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US20050246975A1 - Interlocking concrete joint forms - Google Patents

Interlocking concrete joint forms Download PDF

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Publication number
US20050246975A1
US20050246975A1 US11/108,188 US10818805A US2005246975A1 US 20050246975 A1 US20050246975 A1 US 20050246975A1 US 10818805 A US10818805 A US 10818805A US 2005246975 A1 US2005246975 A1 US 2005246975A1
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United States
Prior art keywords
side portion
metal
shorter
stake
concrete joint
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Abandoned
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US11/108,188
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Eric Weisbach
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CARDINAL Manufacturing Co
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CARDINAL Manufacturing Co
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Application filed by CARDINAL Manufacturing Co filed Critical CARDINAL Manufacturing Co
Priority to US11/108,188 priority Critical patent/US20050246975A1/en
Assigned to CARDINAL MANUFACTURING reassignment CARDINAL MANUFACTURING CORRECTIVE ASSIGNMENT TO CORRECT ASSIGNOR NAME AND THE ASSIGNEE ADDRESS, PREVIOUSLY RECORDED AT REEL/FRAME 016487/0616 (ASSIGNMENT OF ASSIGNOR'S INTEREST) Assignors: WEISBACH, ERIC P.
Assigned to CARDINAL MANUFACTURING reassignment CARDINAL MANUFACTURING ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: WEISBACH, ERIC P.
Publication of US20050246975A1 publication Critical patent/US20050246975A1/en
Abandoned legal-status Critical Current

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    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C11/00—Details of pavings
    • E01C11/02—Arrangement or construction of joints; Methods of making joints; Packing for joints
    • E01C11/04—Arrangement or construction of joints; Methods of making joints; Packing for joints for cement concrete paving
    • E01C11/08—Packing of metal
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F15/00—Flooring
    • E04F15/12—Flooring or floor layers made of masses in situ, e.g. seamless magnesite floors, terrazzo gypsum floors
    • E04F15/14—Construction of joints, e.g. dividing strips

Definitions

  • This invention relates to metal concrete joint forms which utilize adjustable stakes.
  • it relates to an interlocking concrete joint form containing a metal stake having a plurality of serrations which interact with a locking pawl contained in a lower edge of one side of an elongated metal form, wherein the metal form does not include a key-joint portion.
  • Concrete is used for flooring in most major buildings and in other commercial utilizations both inside and out of doors because of its strength, durability and reliability. However, because concrete tends to expand and contract depending on the temperature, concrete slabs frequently crack once they have dried. Concrete also tends to buckle and rise at the point of any fractures caused by the cracking of the concrete slabs.
  • metal divider strips adapted to form a key-joint between two adjacent concrete slabs have been developed such as those shown for example, in U.S. Pat. No. 4,455,104.
  • These key-joints are used in concrete slabs on a premade surface or on the ground.
  • vertical stakes are driven into the ground or subground and arranged with their upper ends near the proposed height of the concrete slab.
  • These stakes contain a means for attachment to the key-joint forms to hold those forms at a preset height.
  • One means of attachment of the stake to the key-joint forms is shown in U.S. Pat. No. 4,455,104.
  • Conventional key-joint forms extend a significant distance into the concrete and include key joints which frequently prevent the placement of wires, conduits and wire mesh under the key-joint forms prior to or during the pouring of the concrete.
  • conventional key-joint metal concrete joint forms are expensive to produce.
  • a metal or plastic strip can be installed into the concrete after it has been poured, but before it sets, to form a joint.
  • This system also has disadvantages based on the nature of the joint strips.
  • an interlocking concrete joint form ( 10 ) containing a supporting metal stake ( 20 ) having a generally flattened end ( 22 ) containing a plurality of serrations ( 26 ) formed on one side ( 23 ) of the flattened end ( 22 ), and
  • an elongated metal form ( 30 ) having a generally flat top portion ( 32 ) with generally parallel planer side portions ( 34 , 36 ), each of which extends at angle of about 90° away from the top portion ( 32 ), wherein one of the side portions ( 34 ) is preferably shorter than the other side portion ( 36 ), wherein the horizontal edge ( 38 ) of the shorter side portion ( 34 ) furthest from the top portion ( 32 ) comprises a hook portion ( 40 ) having a downwardly turned flange ( 42 ) and an inwardly facing inner portion ( 44 ) which forms a locking pawl, wherein the longer side portion ( 36 ) contains an outwardly extending horizontal section ( 46 ) located approximately the same distance from the top portion ( 32 ) as the flange ( 42 ) of the shorter side portion ( 34 ), and wherein neither side portion contains a key-joint portion.
  • FIG. 1 is an exploded, perspective view of the interlocking metal concrete joint form of the invention.
  • FIG. 2 is an exploded, side elevational view of the concrete joint form with the stake separated from the elongated metal form.
  • FIG. 3 is a side elevational view similar to FIG. 2 with the concrete joint form in interlocking relationship with the supporting stake.
  • FIG. 4 is a perspective view showing a building site wherein interlocking concrete joint forms have been installed prior to the pouring of concrete.
  • the metal stake ( 20 ) of the interlocking concrete joint form ( 10 ) is an extended vertical stake designed for driving into the area to be covered by concrete.
  • the metal stake locates and levels the metal form ( 30 ) before the concrete is poured.
  • the metal stake ( 20 ) is constructed of heavy steel. It contains a flattened, top end ( 22 ) with a generally pointed bottom end ( 24 ).
  • the flattened, top end ( 22 ) includes a generally flat side portion ( 23 ) on one side of the stake ( 20 ) for engagement with the elongated metal form ( 30 ).
  • each serration ( 26 ) is in the shape of an upwardly tapered, semi-conical tooth ( 27 ) having a lower, generally horizontal undercut ( 28 ) separating it from the next lower serration. It will be understood by those skilled in the art that other shapes for the serrations ( 26 ) can be utilized without departing from the present invention.
  • These serrations ( 26 ) are preferably formed as embossments by striking the flattened end ( 22 ) of the stake ( 20 ) from the backside ( 29 ) at the same time that the flattened end ( 22 ) is flattened.
  • the elongated metal form ( 30 ) is comprised of a generally flat top portion ( 32 ), a generally planar, shorter side portion ( 34 ) and a generally planar longer side portion ( 36 ) as shown in FIGS. 1-3 .
  • the generally planar longer side portion ( 36 ) is generally no more than about 1 ⁇ 2-2 inches longer than the generally planar, shorter side portion ( 34 ).
  • Each side portion ( 34 , 36 ) is preferably no more than about 1-3 inches in height from the top portion ( 32 ) to the respective horizontal edges of the side portions ( 34 , 36 ).
  • Each of the planar side portions ( 34 , 36 ) extends at approximately a 90 degree angle from the generally flat top portion ( 32 ) of the metal form ( 30 ) as shown in FIGS. 2 and 3 .
  • the generally flat top portion ( 32 ) can be of any width, but generally is relatively narrow, being slightly wider than the width of the flattened end ( 22 ) of the metal stake ( 20 ), as shown in FIG. 3 .
  • the two generally planar side portions ( 34 , 36 ) extend in a generally parallel direction to each other downwardly from the generally flat top portion ( 32 ).
  • the generally planar, shorter side portion ( 34 ) contains a lower horizontal edge ( 38 ) with a downward turned flange ( 42 ), a hook portion ( 40 ) and inwardly facing inner portion ( 44 ).
  • the lower horizontal edge ( 38 ) of the generally planar, shorter side portion ( 34 ) is formed while the downwardly turned flange ( 42 ) is formed with a hem on the inside of the flange ( 42 ). Then the hemmed edge ( 38 ) is folded outward at an angle of about 45 degrees and then folded inwardly to form the inner portion ( 44 ), as shown in FIGS. 2 and 3 .
  • This inwardly facing inner portion ( 44 ) serves as the pawl for cooperation with the plurality of serrations ( 26 ) on the flattened end ( 22 ) of the metal stake ( 20 ), as is shown in FIG. 3 .
  • Sufficient space ( 28 ) is provided between each of serrations ( 26 ) on the flattened end ( 22 ) of the metal stake ( 20 ) so that the inwardly facing inner portion ( 44 ) fits into the space ( 28 ) between the serrations ( 26 ).
  • the vertically arranged serrations ( 26 ) are considered a ratchet and the inwardly facing inner portion ( 44 ) is considered a locking pawl that is stressed in compression in the event a lifting force is applied to the joint form ( 10 ), tending to lift the elongated metal form ( 30 ) from the stake ( 20 ). While it is relatively easy to insert the flattened end ( 22 ) of the metal stake ( 20 ) into the space between the generally planar shorter ( 34 ) and longer ( 36 ) side portions, these portions ( 34 , 36 ) cannot be inadvertently disengaged from the metal form ( 30 ).
  • a screwdriver or other tool should be inserted from the under side up into the space between the planar shorter side portion ( 34 ) and the planar longer side portion ( 36 ) to spread the downward turned flange ( 42 ) outwardly and disengage the inwardly facing inner portion ( 44 ) from the plurality of serrations ( 26 ) of the metal stake ( 20 ).
  • the generally planar, longer side portion ( 36 ) is roughly parallel to the generally planar shorter side portion ( 34 ), as shown in FIGS. 2 and 3 .
  • the longer side portion ( 36 ) extends downward in a generally straight plane except for an outwardly extending, horizontal section ( 46 ) which runs the length of the generally planar, longer side portion ( 36 ).
  • This outwardly extending, horizontal section ( 46 ) is located approximately opposite the downwardly turned flange ( 44 ) of the generally planar, shorter side portion ( 34 ).
  • the longer planar side portion ( 36 ) extends only a short distance beyond the outwardly extending horizontal section ( 46 ) as, shown in FIGS. 2 and 3 , preferably about 0.5 to about 2 inches beyond.
  • joint form ( 10 ) of the invention also eliminates the need for use of a concrete saw to cut joints into already formed concrete slabs. Further, the use of the concrete joint form ( 10 ) of the invention without a key-joint eliminates the need for using metal or plastic pieces placed in the concrete after the concrete has been poured to form a joint.
  • a simplified joint form ( 10 ) is provided for the consumer to produce joints in concrete at a specific depth while still permitting the placement of all components, such as wires, conduits and wire mesh, beneath the joint form ( 10 ) within the concrete.
  • a mechanism is introduced to permit placement of metal stakes ( 20 ) at the site where a concrete slab is to be poured.
  • stretch lines ( 50 ) can be erected across the area where the concrete is to be poured, as shown in FIG. 4 .
  • the metal stakes ( 20 ) are then driven into the ground a sufficient distance until the top of the flattened end ( 22 ) is near the desired height for the concrete determined by the stretch lines.
  • Sufficient metal stakes ( 20 ) are driven to support the full length of the elongated metal forms ( 30 ) that are necessary to form the cracks in the particular concrete slab.
  • the appropriate elongated metal forms ( 30 ) are cut to the appropriate length and are then driven onto the flattened end ( 22 ) of the metal stakes ( 20 ) until the elongated metal form ( 30 ) is in the proper level position. Because of the easy placement of the inwardly facing inner portions ( 44 ) of the elongated metal form between the plurality of serrations ( 26 ) of the metal stake ( 20 ), it is not necessary to use significant force to drive the elongated metal form ( 30 ) onto the metal stake ( 20 ). Once sufficient elongated metal forms ( 30 ) are in place on the metal stakes ( 20 ), the concrete can be poured and the concrete slab prepared.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)

Abstract

An interlocking concrete joint form including a metal stake having a flattened end containing a plurality of serrations and an elongated metal form having a generally flat top portion and a pair of parallel planer side portions, wherein one of the side portions contains an inwardly facing inner portion which forms a locking pawl for interacting with the serrations of the metal stake and wherein neither side portion contains a key-joint portion.

Description

    RELATED APPLICATIONS
  • This application claims priority from Provisional application Ser. No. 60/568,832, filed on May 6, 2004.
    • BACKGROUND OF INVENTION
  • This invention relates to metal concrete joint forms which utilize adjustable stakes. In particular, it relates to an interlocking concrete joint form containing a metal stake having a plurality of serrations which interact with a locking pawl contained in a lower edge of one side of an elongated metal form, wherein the metal form does not include a key-joint portion.
  • Concrete is used for flooring in most major buildings and in other commercial utilizations both inside and out of doors because of its strength, durability and reliability. However, because concrete tends to expand and contract depending on the temperature, concrete slabs frequently crack once they have dried. Concrete also tends to buckle and rise at the point of any fractures caused by the cracking of the concrete slabs.
  • To allow for expansion and contraction while at the same time preventing the vertically displacement of the concrete, metal divider strips adapted to form a key-joint between two adjacent concrete slabs have been developed such as those shown for example, in U.S. Pat. No. 4,455,104. These key-joints are used in concrete slabs on a premade surface or on the ground. To set up these key-joint forms before pouring the concrete, vertical stakes are driven into the ground or subground and arranged with their upper ends near the proposed height of the concrete slab. These stakes contain a means for attachment to the key-joint forms to hold those forms at a preset height. One means of attachment of the stake to the key-joint forms is shown in U.S. Pat. No. 4,455,104.
  • Conventional key-joint forms extend a significant distance into the concrete and include key joints which frequently prevent the placement of wires, conduits and wire mesh under the key-joint forms prior to or during the pouring of the concrete. In addition, conventional key-joint metal concrete joint forms are expensive to produce.
  • In some situations when the area to be covered by concrete is relatively small, instead of using key-joint forms in the concrete, a slab of concrete is poured. The concrete slab is then cut with a concrete saw. The concrete saw forms expansion joints in the concrete. However, the preparation of these joints in concrete slabs can be difficult because of the need for the use of expensive concrete saw cutting equipment.
  • As an alternate process a metal or plastic strip can be installed into the concrete after it has been poured, but before it sets, to form a joint. This system also has disadvantages based on the nature of the joint strips.
  • Because of the cost of conventional metal concrete key-joint forms and because of the difficulties associated with the use of concrete saws and metal or plastic pieces used to form joints in concrete, an improved concrete joint form for use with adjustable stakes is necessary.
  • Therefore, it is an object of the inventors to provide an inexpensive concrete joint form that does not include a key-joint.
  • The objects and features of the present invention will become apparent to those skilled in the art from a consideration of the following detailed description, drawings and claims. The description along with the accompanying drawings provides a selected example of construction of the device to illustrate the invention, but does not place any limitation on the scope of the claims of the invention.
    • SUMMARY OF THE INVENTION
  • In accordance with the present invention there is provided an interlocking concrete joint form (10) containing a supporting metal stake (20) having a generally flattened end (22) containing a plurality of serrations (26) formed on one side (23) of the flattened end (22), and
  • an elongated metal form (30) having a generally flat top portion (32) with generally parallel planer side portions (34, 36), each of which extends at angle of about 90° away from the top portion (32), wherein one of the side portions (34) is preferably shorter than the other side portion (36), wherein the horizontal edge (38) of the shorter side portion (34) furthest from the top portion (32) comprises a hook portion (40) having a downwardly turned flange (42) and an inwardly facing inner portion (44) which forms a locking pawl, wherein the longer side portion (36) contains an outwardly extending horizontal section (46) located approximately the same distance from the top portion (32) as the flange (42) of the shorter side portion (34), and wherein neither side portion contains a key-joint portion.
    • BRIEF DESCRIPTION OF DRAWINGS
  • FIG. 1 is an exploded, perspective view of the interlocking metal concrete joint form of the invention.
  • FIG. 2 is an exploded, side elevational view of the concrete joint form with the stake separated from the elongated metal form.
  • FIG. 3 is a side elevational view similar to FIG. 2 with the concrete joint form in interlocking relationship with the supporting stake.
  • FIG. 4 is a perspective view showing a building site wherein interlocking concrete joint forms have been installed prior to the pouring of concrete.
    • DESCRIPTION OF A PREFERRED EMBODIMENT
  • Although the invention is adaptable to a wide variety of uses, it is shown in the drawings for purpose of illustration as embodied in an interlocking concrete joint form (10) comprised of a metal stake (20) interconnected with an elongated metal form (30), as shown in FIGS. 1-3.
  • The metal stake (20) of the interlocking concrete joint form (10) is an extended vertical stake designed for driving into the area to be covered by concrete. The metal stake locates and levels the metal form (30) before the concrete is poured. Preferably, the metal stake (20) is constructed of heavy steel. It contains a flattened, top end (22) with a generally pointed bottom end (24). Preferably, the flattened, top end (22) includes a generally flat side portion (23) on one side of the stake (20) for engagement with the elongated metal form (30).
  • On the generally flat side portion (23) of the stake (20) is formed a plurality of closely spaced, vertical serrations (26), as shown in FIGS. 1-3. In a preferred embodiment each serration (26) is in the shape of an upwardly tapered, semi-conical tooth (27) having a lower, generally horizontal undercut (28) separating it from the next lower serration. It will be understood by those skilled in the art that other shapes for the serrations (26) can be utilized without departing from the present invention. These serrations (26) are preferably formed as embossments by striking the flattened end (22) of the stake (20) from the backside (29) at the same time that the flattened end (22) is flattened.
  • The elongated metal form (30) is comprised of a generally flat top portion (32), a generally planar, shorter side portion (34) and a generally planar longer side portion (36) as shown in FIGS. 1-3. The generally planar longer side portion (36) is generally no more than about ½-2 inches longer than the generally planar, shorter side portion (34). Each side portion (34, 36) is preferably no more than about 1-3 inches in height from the top portion (32) to the respective horizontal edges of the side portions (34, 36). By keeping these sides portions (34, 36) relatively short, there is significant room below them in the concrete to place wires, cables and mesh. Each of the planar side portions (34, 36) extends at approximately a 90 degree angle from the generally flat top portion (32) of the metal form (30) as shown in FIGS. 2 and 3. The generally flat top portion (32) can be of any width, but generally is relatively narrow, being slightly wider than the width of the flattened end (22) of the metal stake (20), as shown in FIG. 3. The two generally planar side portions (34, 36) extend in a generally parallel direction to each other downwardly from the generally flat top portion (32).
  • The generally planar, shorter side portion (34) contains a lower horizontal edge (38) with a downward turned flange (42), a hook portion (40) and inwardly facing inner portion (44). The lower horizontal edge (38) of the generally planar, shorter side portion (34) is formed while the downwardly turned flange (42) is formed with a hem on the inside of the flange (42). Then the hemmed edge (38) is folded outward at an angle of about 45 degrees and then folded inwardly to form the inner portion (44), as shown in FIGS. 2 and 3. This inwardly facing inner portion (44) serves as the pawl for cooperation with the plurality of serrations (26) on the flattened end (22) of the metal stake (20), as is shown in FIG. 3. Sufficient space (28) is provided between each of serrations (26) on the flattened end (22) of the metal stake (20) so that the inwardly facing inner portion (44) fits into the space (28) between the serrations (26). The interaction between the inwardly facing inner portion (44) of the generally planar shorter side portion (34) and the plurality of serrations (26) of the metal stake (20) permit the metal stake (20) to slide into the space between the shorter (34) and longer (36) planar side portions, snapping into place to form a strong, adjustable locking action between the metal stake (20) and the elongated metal form (30). The vertically arranged serrations (26) are considered a ratchet and the inwardly facing inner portion (44) is considered a locking pawl that is stressed in compression in the event a lifting force is applied to the joint form (10), tending to lift the elongated metal form (30) from the stake (20). While it is relatively easy to insert the flattened end (22) of the metal stake (20) into the space between the generally planar shorter (34) and longer (36) side portions, these portions (34, 36) cannot be inadvertently disengaged from the metal form (30). If it is necessary to remove the metal form (30) from the metal stake (20), a screwdriver or other tool should be inserted from the under side up into the space between the planar shorter side portion (34) and the planar longer side portion (36) to spread the downward turned flange (42) outwardly and disengage the inwardly facing inner portion (44) from the plurality of serrations (26) of the metal stake (20).
  • The generally planar, longer side portion (36) is roughly parallel to the generally planar shorter side portion (34), as shown in FIGS. 2 and 3. The longer side portion (36) extends downward in a generally straight plane except for an outwardly extending, horizontal section (46) which runs the length of the generally planar, longer side portion (36). This outwardly extending, horizontal section (46) is located approximately opposite the downwardly turned flange (44) of the generally planar, shorter side portion (34).
  • In contrast to conventional metal key-joint forms, such as is disclosed in U.S. Pat. No. 4,454,104, the longer planar side portion (36) extends only a short distance beyond the outwardly extending horizontal section (46) as, shown in FIGS. 2 and 3, preferably about 0.5 to about 2 inches beyond. No key-joint, as designated by element 18 in U.S. Pat. No. 4,454,104, is included as part of this generally planar, longer side portion (36). Without this component more space is provided below the elongated metal form (30) in the concrete for placement of wires, conduits and wire mesh. Such unimpeded space is not present with a conventional key-joint, as provided by conventional concrete key-joint forms of the prior art. In addition, by eliminating the key-joint and any further extension of the generally planar, longer side portion (36), the interlocking concrete joint form (10) of the invention is particularly useful for smaller jobs, where fewer joints are necessary.
  • Use of the joint form (10) of the invention also eliminates the need for use of a concrete saw to cut joints into already formed concrete slabs. Further, the use of the concrete joint form (10) of the invention without a key-joint eliminates the need for using metal or plastic pieces placed in the concrete after the concrete has been poured to form a joint.
  • Further, by use of a combination of the elongated metal form (30) with a generally planar, longer side portion, (36) which does not contain a key-joint, with the metal stake (20), a simplified joint form (10) is provided for the consumer to produce joints in concrete at a specific depth while still permitting the placement of all components, such as wires, conduits and wire mesh, beneath the joint form (10) within the concrete.
  • In operation, a mechanism is introduced to permit placement of metal stakes (20) at the site where a concrete slab is to be poured. For example, stretch lines (50) can be erected across the area where the concrete is to be poured, as shown in FIG. 4. The metal stakes (20) are then driven into the ground a sufficient distance until the top of the flattened end (22) is near the desired height for the concrete determined by the stretch lines. Sufficient metal stakes (20) are driven to support the full length of the elongated metal forms (30) that are necessary to form the cracks in the particular concrete slab. The appropriate elongated metal forms (30) are cut to the appropriate length and are then driven onto the flattened end (22) of the metal stakes (20) until the elongated metal form (30) is in the proper level position. Because of the easy placement of the inwardly facing inner portions (44) of the elongated metal form between the plurality of serrations (26) of the metal stake (20), it is not necessary to use significant force to drive the elongated metal form (30) onto the metal stake (20). Once sufficient elongated metal forms (30) are in place on the metal stakes (20), the concrete can be poured and the concrete slab prepared.
  • Modifications of this invention can be made by those skilled in the art. Therefore, it is understood that this invention is not limited to the particular embodiment disclosed in the specification but is intended to cover all modifications which are within the scope of the invention.

Claims (12)

1. An interlocking concrete joint form comprising
a metal stake having a generally flattened end, wherein the flattened end contains a plurality of serrations formed on one side of the flattened end, and
an elongated metal form capable of interlocking with the metal stake, wherein the elongated metal form comprises a generally flat, top portion and generally parallel, planer side portions, each extending at a angle of about 90° in the same direction away from the top portion, wherein one of the side portions is shorter than the other side portion, wherein the bottom edge of the shorter side portion furthest away from the top portion comprises a hook portion having a downwardly turned flange and an inwardly facing inner portion which forms a locking pawl, wherein the second longer side portion containing an outwardly extending horizontal section, located approximately the same distance from the flat top portion as the hook portion of the first side portion and wherein neither side portion contains a key-joint portion.
2. An interlocking concrete joint form comprising
a metal stake having a generally flattened end, wherein the flattened end contains a plurality of serrations formed on one side of the flattened end, and
an elongated metal form capable of interlocking with the metal stake, wherein the elongated metal form comprises a generally flat, top portion and generally parallel, planer side portions, each extending at a angle of about 90° in the same direction away from the top portion, wherein one of the side portions is shorter than the other side portion, wherein the bottom edge of the shorter side portion furthest away from the top portion comprises a hook portion having a downwardly turned flange and an inwardly facing inner portion which forms a locking pawl, wherein the second longer side portion containing an outwardly extending horizontal section, located approximately the same distance from the flat top portion as the hook portion of the first side portion and wherein neither side portion contains a key-joint portion and wherein the metal stake further comprises an extended, raised portion, raised from the plurality of serration, wherein the raised portion prevents the shorter side portion from extending further down the metal stake.
3. An interlocking concrete joint form comprising
a metal stake having a generally flattened end, wherein the flattened end contains a plurality of serrations formed on one side of the flattened end, and
an elongated metal form capable of interlocking with the metal stake, wherein the elongated metal form comprises a generally flat, top portion and generally parallel, planer side portions, each extending at a angle of about 90° in the same direction away from the top portion, wherein one of the side portions is shorter than the other side portion, wherein the bottom edge of the shorter side portion furthest away from the top portion comprises a hook portion having a downwardly turned flange and an inwardly facing inner portion which forms a locking pawl, wherein the second longer side portion containing an outwardly extending horizontal section, located approximately the same distance from the flat top portion as the hook portion of the first side portion and wherein neither side portion contains a key-joint portion and wherein each of the serration are formed in the shape of an upwardly tapered tooth having a lower, generally horizontal undercut separating it from the next lower serration.
4. The interlocking concrete joint form of claim 1, wherein the space between the serrations of the metal stake is approximately equal to the thickness of the locking pawl of the first side portion of the elongated metal form.
5. The interlocking concrete joint form of claim 1, wherein the height of the shorter side portion and the longer side portion is from about 1 to about 3 inches.
6. The interlocking concrete joint form of claim 1, wherein the difference in height between the shorter side portion and the longer side portion is from about ½ inch to about 2 inches.
7. The interlocking concrete joint form of claim 2, wherein the space between the serrations of the metal stake is approximately equal to the thickness of the locking pawl of the first side portion of the elongated metal form.
8. The interlocking concrete joint form of claim 3, wherein the space between the serrations of the metal stake is approximately equal to the thickness of the locking pawl of the first side portion of the elongated metal form.
9. The interlocking concrete joint form of claim 2, wherein the height of the shorter side portion and the longer side portion is from about 1 to about 3 inches.
10. The interlocking concrete joint form of claim 3, wherein the height of the shorter side portion and the longer side portion is from about 1 to about 3 inches.
11. The interlocking concrete joint form of claim 2, wherein the difference in height between the shorter side portion and the longer side portion is from about ½ inch to about 2 inches.
12. The interlocking concrete joint form of claim 3, wherein the difference in height between the shorter side portion and the longer side portion is from about ½ inch to about 2 inches.
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US5450699A (en) * 1993-12-23 1995-09-19 Lee; Nam-Seung Flexible partitioning member for use in forming concrete slab
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US5830378A (en) * 1994-08-29 1998-11-03 Butler; Michael G. Concrete slab foundation forming devices
US6021994A (en) * 1997-09-05 2000-02-08 Shartzer, Jr.; Michael E. Flexible concrete form
US6173937B1 (en) * 1999-01-15 2001-01-16 Feather Lite Innovations, Inc. Cap clip and spreader for poured concrete wall forms
US6598364B1 (en) * 1999-01-17 2003-07-29 Diuk Energy Adjustable height concrete contraction and expansion joints
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US3401612A (en) * 1965-12-14 1968-09-17 Richard N Tone Stake for concrete form
US3429241A (en) * 1966-11-28 1969-02-25 Ankortite Co Inc The Concrete form
US3497172A (en) * 1967-04-05 1970-02-24 Superior Concrete Accessories Concrete form and joint forming member therefor
US3437018A (en) * 1968-01-08 1969-04-08 Meadow Steel Products Inc Concrete slab key-joint forming member
US3572225A (en) * 1968-06-05 1971-03-23 Duane C Burton Concrete form
US3561721A (en) * 1968-08-09 1971-02-09 Vulcan Metal Products Inc Joint member for concrete slabs
US3628764A (en) * 1968-10-31 1971-12-21 Duane C Burton Concrete form
US3677145A (en) * 1970-05-25 1972-07-18 Ind De Precontrainte Et D Equi Expansion joint for road works
US3665778A (en) * 1970-09-02 1972-05-30 Ford Motor Co Energy absorbing steering column
US3770237A (en) * 1971-09-23 1973-11-06 D Burton Concrete form
US3782846A (en) * 1972-02-28 1974-01-01 R Johnson Joint forming and sealing device
US3784313A (en) * 1972-04-13 1974-01-08 Burke Concrete Accessories Means for attaching a key-joint forming strip to a support stake
US3880539A (en) * 1973-05-14 1975-04-29 Brown Co D S Expansion joint and seal
US4050206A (en) * 1974-11-26 1977-09-27 Akira Utsuyama Expansion jointing material for placing concrete, mortar or the like
US4007994A (en) * 1975-12-18 1977-02-15 The D. S. Brown Company Expansion joint with elastomer seal
US4022437A (en) * 1976-01-12 1977-05-10 French Raymond L Batter-board support
US4012024A (en) * 1976-02-03 1977-03-15 Superior Concrete Accessories, Inc. Key-joint forming divider strip with upstanding screed adapted for use with concrete slabs
US4012159A (en) * 1976-03-22 1977-03-15 Superior Concrete Accessories, Inc. Key-joint forming divider strip and screed for use with concrete slabs
US4127352A (en) * 1976-06-03 1978-11-28 Peters Harlan J Placement and support system for strips in concrete
US4198176A (en) * 1978-09-22 1980-04-15 Delta National, Inc. Concrete expansion joint forming structure
US4346542A (en) * 1979-07-09 1982-08-31 Kohkichi Tateno Joint for use in concrete deposit
US4321024A (en) * 1979-10-22 1982-03-23 Paul Terraillon Formwork apparatus for casting directly on the ground accurate concrete slabs
US4340200A (en) * 1979-11-26 1982-07-20 Stegmeier William J Spring clip and molding form utilizing same
US4388016A (en) * 1981-06-02 1983-06-14 Construction Materials, Inc. Expansion joint and seal for use in concrete structures
US4455104A (en) * 1982-04-28 1984-06-19 Cardinal Manufacturing Company Metal concrete joint form and adjustable stakes
US4516675A (en) * 1982-06-01 1985-05-14 Koskovich Jerome E Conveyor feed mechanism
US4411404A (en) * 1982-06-09 1983-10-25 Cardinal Manufacturing Co. Holding clips for stakes supporting metal concrete forms
US4540309A (en) * 1982-07-20 1985-09-10 Hansson Erik G Attachment device
US4579312A (en) * 1984-07-30 1986-04-01 White Lee R Flexible form
US4659247A (en) * 1984-11-09 1987-04-21 Steiner Silidur Ag Andelfingen Edging element with interlaceable elastic anchoring strip
US4712764A (en) * 1986-05-23 1987-12-15 Lee Roy White Flexible forms
US5015117A (en) * 1987-02-06 1991-05-14 Pawlicki Patrick S Construction materials with end connectors
US5205942A (en) * 1987-02-12 1993-04-27 Fitzgerald Leonard R Lipped channel formwork
US4826117A (en) * 1988-01-15 1989-05-02 Hamilton Industries, Inc. Clamp assembly and method for installing the assembly
US4875801A (en) * 1988-05-11 1989-10-24 Anthony Montrym Expansion joint brace and aligner
US4904111A (en) * 1989-02-21 1990-02-27 Cardinal Manufacturing Co. Adjustable support for use with metal keyway forms for above grade concrete slab
US5092091A (en) * 1990-05-07 1992-03-03 Hull Harold L Concrete control key-joint and divider form
US5154837A (en) * 1990-12-03 1992-10-13 Jones A Alan Flexible form
US5048249A (en) * 1990-12-26 1991-09-17 Construction Specialties, Inc. Gasket for flush expansion joint cover
US5492303A (en) * 1991-05-18 1996-02-20 Paschal-Werk G. Maier Gmbh Formwork for surfaces varying in curvature
US5261635A (en) * 1991-12-09 1993-11-16 Symons Corporation Slab joint system and apparatus for joining concrete slabs in side-by-side relation
US5332191A (en) * 1992-10-26 1994-07-26 Nolan Terry L Apparatus for making concrete slabs
US5380122A (en) * 1993-09-28 1995-01-10 Bometals, Inc. Joint forms for concrete slabs and method for installation of joint forms
US5450699A (en) * 1993-12-23 1995-09-19 Lee; Nam-Seung Flexible partitioning member for use in forming concrete slab
US5830378A (en) * 1994-08-29 1998-11-03 Butler; Michael G. Concrete slab foundation forming devices
US6021994A (en) * 1997-09-05 2000-02-08 Shartzer, Jr.; Michael E. Flexible concrete form
US6173937B1 (en) * 1999-01-15 2001-01-16 Feather Lite Innovations, Inc. Cap clip and spreader for poured concrete wall forms
US6598364B1 (en) * 1999-01-17 2003-07-29 Diuk Energy Adjustable height concrete contraction and expansion joints
US6629681B1 (en) * 2000-02-18 2003-10-07 Metal Forms Corporation Flexible form assembly

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