US1651998A - Valve-spring lifter - Google Patents

Description

PatentedDec. 6 1927.

A tarima verve-SEEING; METER;

Application led February 16, 192,6; Serial No. 88,527.

This invention relates to valve spring litters whichV are adapted for, compressing the helical spring 'around the rstem yof `the valve of a engine for the purpose of 'freen ing from the spring pressure'pthe 4cross-pin orcotter-pin which holds the: spring on the valve stem, so that y the said pin may be readily removed to enable the removal of the spring Vand the valve'. of" the present invention is to provide simple and eiiiei'ent operatinov means for the working jaws of the device, adaptedv to be held-in the itslength aloc'ling dog having a plurality i of teetlrsetreversely to the yteeth of the tion betweenl "and vFig- 6 rack,I the dog being( so constructed and operable that when the dog is* released bythe operator its spring willucause av binding rela` theteeth of the* dog and-a biting edge ofy the dog on the lui'itoothed edlgreoffthel rack. g

These being among the objects of Vthe presentiinvention,thesame Consists of certain features ofconstruction and Combinations of parts 'to be hereinafter described and i then claimed with reference tothev aco-empanying drawings illustrating Lthe prefer-red form of the invention andin which, f y

Fig. 1 isa side elevation of the improved valve spring lifting tool show-ingit in `actual use, parts of the engine being shown in elevation 'and parts in section;

Fig.` 2 is aly top plan view? of the device; Eig. 3 is a detaflsectional view 'ehowing the locking dogfandtraol released so that the jaws of the two maybe adjusted; l

Fig,-4"is a" section konthe line Fig.. 1 ;y Fig. 5=is a section on the line 5-i-5 Fig.1; l is a broken' detail view illustrating a modified jawl locking and releasingv niechanism;

l Referring to Fig. 1,1the portion yl of the engine, valve 11, valve stem 12,

Awith the guide post or member One ofthe objects' a very efrcient ,adapted helical valve-'w seating spring 13, spring. retaining cup 14' and securingpinl 1li' are illustratedtogether y 16 inV which the valve stem push rod is guided, These part-s ortheirequivalents are Sowell known inthe gas `engineart that'theutility 'ofthe improved valvespring lifteriaccording to the present invention 'will become readily apparentl to those skilled in theart; i f

y The improved valve spring'lifter or toolv of the present invention comprises apair'o'f arms l?, 18 and theerm 17: may' be Cork y sidered the'upper arm,A and theharm'lS the lower one, said arms being connected atV their innerends a pivot 19. Riveted or other@ wise'rigidly secured to the arms l17, 18 are levers 21, respectively, their points Aof attachment to the Yarms being "in adi'iancel o f the pivot 19, that is, sulelrpointsare locatedV between the pivot 19 and' the Vopposite ends of the armsl 1T, 18. ljl'andles` 22, 23 are pro'- vided at theouter ends of the levers 20, 21,

to be conveniently and mutually grasped by one hand, andthe location of the pivot 19 4with respect to the points where the power is applied to the arinsl, 18 issuch that a. considerable leverage Canbe obtained on the arms by means of the levers 20 21. leihen the handles areY bro 'ight together-the outer' ends of the` arms willbe spreadapart,V and vice versa; i "Y in arcuate link member ouracl; 2l is pivoted preferably to the lever 21`for the arm 18, by means of a pivotf, so that'the said racl 2li maybe positioned to extendtoward-s the other lever 20, whereatvthe locking means are arranged which cooperate with the raclr. The raek'shown in Figs.` 1 and 3 is bowed in a direction away from theconv aov necting pivot 19, and at the outwardly curved Y edge of the rackl it ofratlchet teeth 25, which extend over considerable length oft-he rack` A locking dog is mounted for pivotal'movement on the stud Y S28 extending fromy the lever 20,' andV is" provided with a lseries v said dog isi provided with aahook-lile guide rwhichl l receives portion Y,29' at' its outerend 24a Thereby and guides Ythe pivoted *rack valso,the backofithe'raok is adapted to engage the extremevv outer. portion of the guide 29. The general inclination or the effect ,of

shoulders 'of/'g the ratchet teeth 'are disposed towards the pivot of the raclrand'thaft the posi-tively and i"eliably-'h eld in their outwardly spread position.

` Referring to rl" ig. 6 wherein a modification of the jaw adjusting andV locking means is shown the handle levers 52, 53 will be understood to be attached to arms 17, 18 similar to those before described. ,A rack member 54 is pivoted to thelever 58, but in this moditication the rack is bowedV in the direction oli the handles ,of the tool while the ratchet teeth thereof 'face in the direction of the arms which carry the jaws. provided with a guide 56 and connected by a pivot stud 57 with the lever 52, and said dog is provided with a thumb-piece 58. The

ktension spring 59 connects the dog with the lever 52 and has a tendency 'to' cause the tooth Ga of the dog to bite between the teeth 5a-av o the series of ratchet teeth. The use and action of this modilied construction or' adjusting and locking mechanism should be clear without Jfurther description.

Obviously the invention is susceptible to modification, as parts may be omitted,

added and substituted without departing from the scope of theappended claims.

What I claim, is:v i

l. A tool of the character described, coinprising, in combination, arms pivotally con-- nected at corresponding ends and provided with jaws at theother ends, handle levers rigidly secured to the arms at points between the pivot of the arms and the jaws, wherebyV the ksaid pivot and the pivotally connected ends of the arms are located to the rear of Y, the inner ends of the levers, and automatic levers,

' one lever,

locking -means for retaining the arms and jaws as adjusted by the handles.

2. A tool of the character described, comprising, in combination, pivotally connected levers, arms provided with jaws and operable bv the levers, a ratchet rack pivoted to one lever, a locking dog pivoted to the other lever and having a thumb member adapted to release the dog 'from the ratchet teeth of the rack, when the levers are pressed t0- gether, a tension spring connecting the thumb member with the corresponding lever, and means `for mutually locking the dog and rack and causing the rack to prevent separation of the handles. c n p Y 3'. A tool or" the character described, comprising, in combination, pivotally connected arms provided with jaws and operable by the levers, a ratchet rack pivoted to sented in a. direction away from .the pivot, a locking dog pivoted'to the other lever and having a thumb member adapted to `release A dog is and the teethof which are pre-n the dog from the.l ratchetctgeeth of the raclr, y

when the levers are. pressedv together, said dogv having a tooth arranged tangentially of' the pivot of the dog, a4 tension spring actuating the thumb member from the corre-l sponding lever, and means for mutually locking the dog and rack and. causing the rack to prevent separation ot the liandles.`

4. A tool of the character described, comprising, in combination, pivotally connected levers, arms provided' with jaws and operable by the levers, a bowed ratchetk rack pivoted to one lever and the teeth oi:p which are at the outwardly bowed edge, a manually operable locking dog pivoted to the other lever and having -a tooth presented in opposite direction to the teeth of the rack, a f

spring for acting'on the teeth to engage the teeth oit the rack, and a guide on the dog for the rack, said guide cooperating with the engaged teeth to bind the rack between them in said'guide.

5. A tool ot' the characterfdescribed, Lcomprising, in combination, pivotally connected levers, arms provided with jaws ,and Voperable by the levers, a ratchet'rack pivoted to one lever and having the square shoulders or" its teeth presented toward its pivot, spring actuated locking dog pivoted to the other lever and having its tooth directed toward the free end of thel rack, whereby the levers are locked against relative outward movement, said dog riding freely over the inclined surfaces of the ratchet teeth when the levers are pressed towards each other, means for releasing the dog from the square shoulders of therack when the levers are to be moved apart, and an abutment carried by the lever to which the dog is pivoted for holding the rack and dog in mutually locked position and :tor causing the rack to prevent separa-tion of they levers.

6. A tool of the character described, coinprising, in combination, pivotally connected levers, armsprovided with jaws and operable bythe levers, a ratchet rack pivoted to one lever and having of itsteeth presented toward its pivot, a spring actuated lockii'ig dog pivoted' to the other lever and. having its tooth directed toward the 'free end of the rack, whereby the levers are locked against relative outward movement, said dog riding freely over the inclined surfaces or' the ratchet teeth the mutual locking engagement ot the teeth and the holding, by the rack, of the leversY against separation, positively released. Y f

7'. A tool or' tliecharacter described, coin- Aexcept when the dog is prising, in combination, `pivotally connected 5"' do@ to cause its lll) the` square shoulders levers, arms provided with jews ndeper-` able by the levers, u ratchet mek piv'eted to one lever, L locking; deg piveted te the other lever `and having' :1 thumb member adapted te release the deg from the ratchet teeth of the mehr when thelevers have been pressed together, u tension spring mounted en the sume lever as the `locking `deg and acting thereon te threw its tooth inte engagement with the ratchet teeth, und abutment means 10 fer n'xutlmlly locking the deg and rack and Causing the ruck te prevent separation of the levers.

DOMINICK CLERICO.

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