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US20190040854A1 - Baffling system designed for acoustic suppression - Google Patents

Baffling system designed for acoustic suppression Download PDF

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Publication number
US20190040854A1
US20190040854A1 US15/670,080 US201715670080A US2019040854A1 US 20190040854 A1 US20190040854 A1 US 20190040854A1 US 201715670080 A US201715670080 A US 201715670080A US 2019040854 A1 US2019040854 A1 US 2019040854A1
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US
United States
Prior art keywords
baffle
housing section
illustrates
chamber
acoustic suppression
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US15/670,080
Inventor
Justin Manley
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to US15/670,080 priority Critical patent/US20190040854A1/en
Publication of US20190040854A1 publication Critical patent/US20190040854A1/en
Priority to US18/097,219 priority patent/US20230267904A1/en
Abandoned legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/0027—Pulsation and noise damping means
    • F04B39/0055—Pulsation and noise damping means with a special shape of fluid passage, e.g. bends, throttles, diameter changes, pipes
    • F04B39/0061—Pulsation and noise damping means with a special shape of fluid passage, e.g. bends, throttles, diameter changes, pipes using muffler volumes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B11/00—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation
    • F04B11/0091—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation using a special shape of fluid pass, e.g. throttles, ducts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/001—Noise damping
    • F04B53/004—Noise damping by mechanical resonators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2207/00—External parameters
    • F04B2207/70—Warnings
    • F04B2207/701—Sound

Definitions

  • Reciprocating pumps utilize a suction manifold and a discharge manifold for moving the media that is being pumped. These manifolds are equipped with valves that assist the reciprocating pump in media delivery to the piston or plunger chamber. When the valves are opening and closing, this creates a high frequency energy wave that is contained in the pumped media. This high frequency energy wave is commonly referred to as acoustic energy or harmonics, and they are damaging to the pump and piping system. If acoustics aren't properly filtered out of the system, this will create premature failures on pump expendables as well as the piping components.
  • a silencer device for acoustic suppression may include a first housing section; and a second housing section detachably connected to the first housing section.
  • the first housing section may define a first baffle chamber and the second housing section defines a second baffle chamber.
  • the silencer device may include a baffle device positioned within the first baffle chamber and the second baffle chamber.
  • the baffle device may include a first baffle.
  • the baffle device may include a second baffle in a spaced relationship to the first baffle.
  • the first baffle device may include a first arched aperture.
  • the first baffle device may include a second arched aperture.
  • the second baffle device may include a third arched aperture.
  • the second baffle device may include a fourth arched aperture.
  • the first arched aperture may be positioned substantially 90° from the third arched aperture.
  • the second arched aperture may be positioned substantially 90° from the fourth arched aperture.
  • FIG. 1 illustrates an end view of the silencer device of the present invention
  • FIG. 2 illustrates a side view of the silencer device of the present invention
  • FIG. 3 illustrates a top view of the silencer device of the present invention
  • FIG. 4 illustrates a side view of the baffle device of the present invention
  • FIG. 5 illustrates a front view of the first baffle of the present invention
  • FIG. 6 illustrates a front view of the second baffle of the present invention
  • FIG. 7 illustrates a side view of the first baffle or the second baffle of the present invention
  • FIG. 8 illustrates a portion of the baffle chamber of the present invention
  • FIG. 9 illustrates a side view of the baffle rod of the present invention.
  • FIG. 10 illustrates a side view of the groove.
  • Reciprocating pumps utilize a suction manifold and a discharge manifold for moving the media that is being pumped. These manifolds are equipped with valves that assist the reciprocating pump in media delivery to the piston or plunger chamber. When the valves are opening and closing, this creates a high frequency energy wave that is contained in the pumped media. This high frequency energy wave is commonly referred to as acoustic energy or harmonics, and they are damaging to the pump and piping system. If acoustics aren't properly filtered out of the system, this will create premature failures on pump expendables as well as the piping components. The present invention solves this problem.
  • the present invention utilizes an inline, multiple chambered, baffling system positioned between the suction manifold and the discharge manifold to absorb and reorganize high frequency energy waves or acoustic energy.
  • the inline design forces the acoustics into the baffling chambers then restrict and redirects the flow of media, producing a pressure drop across the baffling and absorbing acoustic energy.
  • the discharge of the baffling system produces a smoother, reorganized harmonic Signature safe for the pump and piping system.
  • FIG. 3 illustrates a top view (which may be a mirrored bottom view) of the baffle housing 101 of the silencer device 100 of the present invention.
  • the baffle housing 101 may include a first housing section 103 and a mirrored second housing section 105 which may be detachably connected to the first housing section 103 by a fastener 151 for example an opposed pair of threaded bolts and nuts or other appropriate fasteners.
  • the first housing section 103 and the second housing section 105 may include a first baffle chamber 107 and a mirrored second baffle chamber 109 respectively which may extend through the baffle housing 101 .
  • the first baffle chamber 107 may extend through the first housing section 103 to the first opening 111
  • the second baffle chamber 109 may extend through the second housing section 105 to the second opening 113 where the first opening 111 and the second opening 113 may connect to the suction manifold and the discharge manifold (not shown) respectively.
  • the first baffle chamber 107 and the mirrored second baffle chamber 109 may include a wide portion 131 and a narrow portion 133 which may connect to the wide portion 131 and the first opening 111 and the second opening 113 and may connect to the wide portion 131 by a shoulder 135 .
  • the wide portion 131 may be connected to a baffle device 141 which may include a pair of opposing first baffle 143 and a second baffle 145 which may be connected by a baffle connector rod 147 .
  • the periphery of the first baffle 143 and the second baffle 145 may extend to the surface of the first housing section 103 and the second housing section 105 respectively.
  • the surface of the first housing section 103 and the second housing section may be defined by the wide portion 131 of the first baffle chamber 107 and the second baffle chamber 109 .
  • the first housing section 103 and the second housing section 105 may include apertures 115 for connection to the suction manifold and to the discharge manifold. Additionally, the first housing section 103 and the second housing section 105 may include a groove 149 which may extend around the periphery of the first and second housing section 103 , 105 in order to facilitate the application of a gasket to seal the suction manifold and the discharge manifold.
  • FIG. 10 illustrates a detail of the groove 149 .
  • FIG. 2 illustrates the first housing section 103 (the second housing section 105 may be a mirror of the first housing section 103 ) which may include the first baffle chamber 107 which may include a wide portion 131 and a narrow portion 133 connected by a shoulder 135 .
  • the narrow portion 133 may include an opening 111 to allow fluid to either enter or escape from or to the suction manifold/discharge manifold.
  • a groove 149 may extend around the opening 111 to provide for a gasket to seal the housing section 103 with either the suction manifold or discharge manifold.
  • a fastener 151 may extend through the first housing section 103 and the second housing section 105 to connect the first housing section 103 to the second housing section 105 . These fasteners 151 may extend around the periphery of the silencer device 100 .
  • FIG. 1 illustrates an end view of the silencer device 100 of the present invention and illustrates the first housing section 103 which may include first opening 111 to the narrow portion 113 of the baffle chamber 107 . Additionally illustrated is the aperture 115 the fastener 151 and the groove 149 .
  • FIG. 4 illustrates a side view of the battle device 141 which may include a first baffle 141 and a second baffle 143 both of which may be positioned in a spaced relationship and may be mounted on a baffle connector rod 147 which may extend beyond the first baffle 141 and the second baffle 143 .
  • the baffle connector rod 147 is shown having a circular cross-section, but other configurations are within the scope of the present invention.
  • FIG. 5 illustrates an end view of the first baffle 145 which may include a first arched aperture 171 which may extend through the first baffle 145 and a second opposed arched aperture 173 which may extend through the first baffle 145 .
  • FIG. 5 shows that the first arched aperture 171 is positioned near the top of the first baffle while the second arched aperture 173 is positioned near the bottom of the first baffle 145 .
  • FIG. 6 illustrates an end view of the second baffle 143 which may include a third arched aperture 175 and an opposed fourth arched aperture 177 both of which may extend through the second baffle 143 .
  • the third arched aperture 175 may be positioned along the side of the second baffle 143 (approximately 90° from the first arched aperture 171 ).
  • the fourth arched aperture 177 may be positioned along the opposite side of the second baffle 143 (approximately 90° from the second arched aperture 173 ).
  • FIG. 7 illustrates a side view of either the first baffle 145 or the second baffle 143 .
  • FIG. 8 illustrates a portion of the first housing section 103 , the fastener 151 , the groove 149 and the shoulder 135 .
  • FIG. 9 illustrates a side view of the baffle connector rod 141 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Pipe Accessories (AREA)

Abstract

A silencer device for acoustic suppression may include a first housing section; and a second housing section detachably connected to the first housing section. The first housing section may define a first baffle chamber and the second housing section defines a second baffle chamber. The silencer device may include a baffle device positioned within the first baffle chamber and the second baffle chamber.

Description

    FIELD OF THE INVENTION Background
  • Reciprocating pumps utilize a suction manifold and a discharge manifold for moving the media that is being pumped. These manifolds are equipped with valves that assist the reciprocating pump in media delivery to the piston or plunger chamber. When the valves are opening and closing, this creates a high frequency energy wave that is contained in the pumped media. This high frequency energy wave is commonly referred to as acoustic energy or harmonics, and they are damaging to the pump and piping system. If acoustics aren't properly filtered out of the system, this will create premature failures on pump expendables as well as the piping components.
    • SUMMARY
  • A silencer device for acoustic suppression may include a first housing section; and a second housing section detachably connected to the first housing section. The first housing section may define a first baffle chamber and the second housing section defines a second baffle chamber. The silencer device may include a baffle device positioned within the first baffle chamber and the second baffle chamber.
  • The baffle device may include a first baffle.
  • The baffle device may include a second baffle in a spaced relationship to the first baffle.
  • The first baffle device may include a first arched aperture.
  • The first baffle device may include a second arched aperture.
  • The second baffle device may include a third arched aperture.
  • The second baffle device may include a fourth arched aperture.
  • The first arched aperture may be positioned substantially 90° from the third arched aperture.
  • The second arched aperture may be positioned substantially 90° from the fourth arched aperture.
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • The invention may be understood by reference to the following description taken in conjunction with the accompanying drawings, in which, like reference numerals identify like elements, and in which:
  • FIG. 1 illustrates an end view of the silencer device of the present invention;
  • FIG. 2 illustrates a side view of the silencer device of the present invention;
  • FIG. 3 illustrates a top view of the silencer device of the present invention;
  • FIG. 4 illustrates a side view of the baffle device of the present invention;
  • FIG. 5 illustrates a front view of the first baffle of the present invention;
  • FIG. 6 illustrates a front view of the second baffle of the present invention;
  • FIG. 7 illustrates a side view of the first baffle or the second baffle of the present invention;
  • FIG. 8 illustrates a portion of the baffle chamber of the present invention;
  • FIG. 9 illustrates a side view of the baffle rod of the present invention;
  • FIG. 10 illustrates a side view of the groove.
    •  DETAILED DESCRIPTION
  • Reciprocating pumps utilize a suction manifold and a discharge manifold for moving the media that is being pumped. These manifolds are equipped with valves that assist the reciprocating pump in media delivery to the piston or plunger chamber. When the valves are opening and closing, this creates a high frequency energy wave that is contained in the pumped media. This high frequency energy wave is commonly referred to as acoustic energy or harmonics, and they are damaging to the pump and piping system. If acoustics aren't properly filtered out of the system, this will create premature failures on pump expendables as well as the piping components. The present invention solves this problem.
  • The present invention utilizes an inline, multiple chambered, baffling system positioned between the suction manifold and the discharge manifold to absorb and reorganize high frequency energy waves or acoustic energy. The inline design forces the acoustics into the baffling chambers then restrict and redirects the flow of media, producing a pressure drop across the baffling and absorbing acoustic energy. The discharge of the baffling system produces a smoother, reorganized harmonic Signature safe for the pump and piping system.
  • FIG. 3 illustrates a top view (which may be a mirrored bottom view) of the baffle housing 101 of the silencer device 100 of the present invention. The baffle housing 101 may include a first housing section 103 and a mirrored second housing section 105 which may be detachably connected to the first housing section 103 by a fastener 151 for example an opposed pair of threaded bolts and nuts or other appropriate fasteners. The first housing section 103 and the second housing section 105 may include a first baffle chamber 107 and a mirrored second baffle chamber 109 respectively which may extend through the baffle housing 101. The first baffle chamber 107 may extend through the first housing section 103 to the first opening 111, and the second baffle chamber 109 may extend through the second housing section 105 to the second opening 113 where the first opening 111 and the second opening 113 may connect to the suction manifold and the discharge manifold (not shown) respectively. The first baffle chamber 107 and the mirrored second baffle chamber 109 may include a wide portion 131 and a narrow portion 133 which may connect to the wide portion 131 and the first opening 111 and the second opening 113 and may connect to the wide portion 131 by a shoulder 135.
  • The wide portion 131 may be connected to a baffle device 141 which may include a pair of opposing first baffle 143 and a second baffle 145 which may be connected by a baffle connector rod 147. The periphery of the first baffle 143 and the second baffle 145 may extend to the surface of the first housing section 103 and the second housing section 105 respectively. The surface of the first housing section 103 and the second housing section may be defined by the wide portion 131 of the first baffle chamber 107 and the second baffle chamber 109.
  • The first housing section 103 and the second housing section 105 may include apertures 115 for connection to the suction manifold and to the discharge manifold. Additionally, the first housing section 103 and the second housing section 105 may include a groove 149 which may extend around the periphery of the first and second housing section 103, 105 in order to facilitate the application of a gasket to seal the suction manifold and the discharge manifold. FIG. 10 illustrates a detail of the groove 149.
  • FIG. 2 illustrates the first housing section 103 (the second housing section 105 may be a mirror of the first housing section 103) which may include the first baffle chamber 107 which may include a wide portion 131 and a narrow portion 133 connected by a shoulder 135. The narrow portion 133 may include an opening 111 to allow fluid to either enter or escape from or to the suction manifold/discharge manifold. A groove 149 may extend around the opening 111 to provide for a gasket to seal the housing section 103 with either the suction manifold or discharge manifold. A fastener 151 may extend through the first housing section 103 and the second housing section 105 to connect the first housing section 103 to the second housing section 105. These fasteners 151 may extend around the periphery of the silencer device 100.
  • FIG. 1 illustrates an end view of the silencer device 100 of the present invention and illustrates the first housing section 103 which may include first opening 111 to the narrow portion 113 of the baffle chamber 107. Additionally illustrated is the aperture 115 the fastener 151 and the groove 149.
  • FIG. 4 illustrates a side view of the battle device 141 which may include a first baffle 141 and a second baffle 143 both of which may be positioned in a spaced relationship and may be mounted on a baffle connector rod 147 which may extend beyond the first baffle 141 and the second baffle 143. The baffle connector rod 147 is shown having a circular cross-section, but other configurations are within the scope of the present invention.
  • FIG. 5 illustrates an end view of the first baffle 145 which may include a first arched aperture 171 which may extend through the first baffle 145 and a second opposed arched aperture 173 which may extend through the first baffle 145. FIG. 5 shows that the first arched aperture 171 is positioned near the top of the first baffle while the second arched aperture 173 is positioned near the bottom of the first baffle 145.
  • FIG. 6 illustrates an end view of the second baffle 143 which may include a third arched aperture 175 and an opposed fourth arched aperture 177 both of which may extend through the second baffle 143. The third arched aperture 175 may be positioned along the side of the second baffle 143 (approximately 90° from the first arched aperture 171). The fourth arched aperture 177 may be positioned along the opposite side of the second baffle 143 (approximately 90° from the second arched aperture 173).
  • FIG. 7 illustrates a side view of either the first baffle 145 or the second baffle 143.
  • FIG. 8 illustrates a portion of the first housing section 103, the fastener 151, the groove 149 and the shoulder 135.
  • FIG. 9 illustrates a side view of the baffle connector rod 141.
  • While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof have been shown by way of example in the drawings and are herein described in detail. It should be understood, however, that the description herein of specific embodiments is not intended to limit the invention to the particular forms disclosed.

Claims (9)

1) A silencer device for acoustic suppression, comprising:
a first housing section;
a second housing section detachably connected to the first housing section;
wherein the first housing section defines a first baffle chamber and the second housing section defines a second baffle chamber;
wherein the silencer device includes a baffle device positioned within the first baffle chamber and the second baffle chamber.
2) A silencer device for acoustic suppression as in claim 1, wherein the baffle device includes a first baffle.
3) A silencer device for acoustic suppression as in claim 2, wherein the baffle device includes a second baffle in a spaced relationship to the first baffle.
4) A silencer device for acoustic suppression as in claim 3, wherein the first baffle device includes a first arched aperture.
5) A silencer device for acoustic suppression as in claim 4, wherein the first baffle device includes a second arched aperture.
6) A silencer device for acoustic suppression as in claim 5, wherein the second baffle device includes a third arched aperture.
7) A silencer device for acoustic suppression as in claim 6, wherein the second baffle device includes a fourth arched aperture.
8) A silencer device for acoustic suppression as in claim 7, wherein the first arched aperture is positioned substantially 90° from the third arched aperture.
9) A silencer device for acoustic suppression as in claim 8, wherein the second arched aperture is positioned substantially 90° from the fourth arched aperture.
US15/670,080 2017-08-07 2017-08-07 Baffling system designed for acoustic suppression Abandoned US20190040854A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US15/670,080 US20190040854A1 (en) 2017-08-07 2017-08-07 Baffling system designed for acoustic suppression
US18/097,219 US20230267904A1 (en) 2017-08-07 2023-01-14 Baffling system designed for acoustic suppression

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US15/670,080 US20190040854A1 (en) 2017-08-07 2017-08-07 Baffling system designed for acoustic suppression

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US18/097,219 Continuation-In-Part US20230267904A1 (en) 2017-08-07 2023-01-14 Baffling system designed for acoustic suppression

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Citations (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1184431A (en) * 1915-08-21 1916-05-23 Dodge Brothers Noise-muffler.
US1622692A (en) * 1926-05-12 1927-03-29 Wendling Albert George Exhaust muffler
US1631391A (en) * 1925-12-07 1927-06-07 Williams John Ward Muffler
US1769778A (en) * 1926-06-26 1930-07-01 Charles H Suiter Air cleaner
US1877567A (en) * 1931-09-02 1932-09-13 William P Erbes Hot and cold water mixer for showers
US1927947A (en) * 1931-02-03 1933-09-26 Westinghouse Air Brake Co Muffler
US1983304A (en) * 1929-07-24 1934-12-04 Chicago Pneumatic Tool Co Muffler
US2019746A (en) * 1930-12-08 1935-11-05 Continental Motors Corp Muffler
US2202272A (en) * 1939-02-11 1940-05-28 Harold D Smith Silencer
US2392247A (en) * 1943-05-11 1946-01-01 Katcher Morris Muffler
US2566939A (en) * 1950-05-02 1951-09-04 Howard R Johnson Muffler with plural side branch chambers
US2914133A (en) * 1955-04-28 1959-11-24 Howard R Johnson Outboard motor air intake
US3187837A (en) * 1963-08-28 1965-06-08 Charles G Beeching Free flow acoustic silencer constructed of resilient material
US3559760A (en) * 1970-03-03 1971-02-02 Ford Motor Co Vehicle muffler and particle separator
US3622258A (en) * 1969-06-14 1971-11-23 Mansei Kogyo Kk Ignition system for petroleum burning instrument
US3631853A (en) * 1969-09-25 1972-01-04 Marvin A Burdette Jr Genital erector
US3672354A (en) * 1970-09-04 1972-06-27 Scovill Manufacturing Co Rest-inducing device
US3838749A (en) * 1973-02-15 1974-10-01 H Johnson Pulse noise reducer
US3847513A (en) * 1969-02-10 1974-11-12 Gale W Inc Air pump
US3880110A (en) * 1973-07-30 1975-04-29 Leo J Loesch Shaft operation monitor
US3889672A (en) * 1973-08-27 1975-06-17 Gen Electric Open circuit system for respiration testing
US3966015A (en) * 1975-02-19 1976-06-29 General Motors Corporation Silencer element
US4031979A (en) * 1975-04-24 1977-06-28 Raleigh Roger W Adjustable muffler for model aircraft type engines
US4167987A (en) * 1978-04-24 1979-09-18 W. H. Salisbury & Co. Multiple flow marine muffler constructed of resilient material
DE3743466A1 (en) * 1986-12-30 1988-07-14 Sanahuja Jaime Solsona Silencer for exhaust pipes of vehicles, especially motor vehicles
US5236312A (en) * 1991-12-23 1993-08-17 Ford Motor Company Swash-plate-type air conditioning pump
US6902030B2 (en) * 2003-04-30 2005-06-07 Vilho O. Mantyla Sound muffling apparatus for air operated equipment
US8256571B1 (en) * 2010-10-29 2012-09-04 Butler Boyd L Frequency-modifying muffler
US8523015B2 (en) * 2004-05-17 2013-09-03 Koninklijke Philips N.V. Reciprocating pump with reduced noise level

Patent Citations (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1184431A (en) * 1915-08-21 1916-05-23 Dodge Brothers Noise-muffler.
US1631391A (en) * 1925-12-07 1927-06-07 Williams John Ward Muffler
US1622692A (en) * 1926-05-12 1927-03-29 Wendling Albert George Exhaust muffler
US1769778A (en) * 1926-06-26 1930-07-01 Charles H Suiter Air cleaner
US1983304A (en) * 1929-07-24 1934-12-04 Chicago Pneumatic Tool Co Muffler
US2019746A (en) * 1930-12-08 1935-11-05 Continental Motors Corp Muffler
US1927947A (en) * 1931-02-03 1933-09-26 Westinghouse Air Brake Co Muffler
US1877567A (en) * 1931-09-02 1932-09-13 William P Erbes Hot and cold water mixer for showers
US2202272A (en) * 1939-02-11 1940-05-28 Harold D Smith Silencer
US2392247A (en) * 1943-05-11 1946-01-01 Katcher Morris Muffler
US2566939A (en) * 1950-05-02 1951-09-04 Howard R Johnson Muffler with plural side branch chambers
US2914133A (en) * 1955-04-28 1959-11-24 Howard R Johnson Outboard motor air intake
US3187837A (en) * 1963-08-28 1965-06-08 Charles G Beeching Free flow acoustic silencer constructed of resilient material
US3847513A (en) * 1969-02-10 1974-11-12 Gale W Inc Air pump
US3622258A (en) * 1969-06-14 1971-11-23 Mansei Kogyo Kk Ignition system for petroleum burning instrument
US3631853A (en) * 1969-09-25 1972-01-04 Marvin A Burdette Jr Genital erector
US3559760A (en) * 1970-03-03 1971-02-02 Ford Motor Co Vehicle muffler and particle separator
US3672354A (en) * 1970-09-04 1972-06-27 Scovill Manufacturing Co Rest-inducing device
US3838749A (en) * 1973-02-15 1974-10-01 H Johnson Pulse noise reducer
US3880110A (en) * 1973-07-30 1975-04-29 Leo J Loesch Shaft operation monitor
US3889672A (en) * 1973-08-27 1975-06-17 Gen Electric Open circuit system for respiration testing
US3966015A (en) * 1975-02-19 1976-06-29 General Motors Corporation Silencer element
US4031979A (en) * 1975-04-24 1977-06-28 Raleigh Roger W Adjustable muffler for model aircraft type engines
US4167987A (en) * 1978-04-24 1979-09-18 W. H. Salisbury & Co. Multiple flow marine muffler constructed of resilient material
DE3743466A1 (en) * 1986-12-30 1988-07-14 Sanahuja Jaime Solsona Silencer for exhaust pipes of vehicles, especially motor vehicles
US5236312A (en) * 1991-12-23 1993-08-17 Ford Motor Company Swash-plate-type air conditioning pump
US6902030B2 (en) * 2003-04-30 2005-06-07 Vilho O. Mantyla Sound muffling apparatus for air operated equipment
US8523015B2 (en) * 2004-05-17 2013-09-03 Koninklijke Philips N.V. Reciprocating pump with reduced noise level
US8256571B1 (en) * 2010-10-29 2012-09-04 Butler Boyd L Frequency-modifying muffler

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