US1553623A - Parallel valve-spring lifter - Google Patents

Description

Sept. 15. 1925. 1,553,623

J. H. M LEOD.

/ rARALLEL VALVE'SPRING LIFTER Filed Aug. 20, 1924- INVENTOR Patented Sept. 15, 1925.

UNITED Joint :n. Manson, :o r 's rocn'ron, can-mennm, AssIGNon or ONE-HALF TO Fain) cmmx, or s rocxroN, oanrronnm.

EPARALLEL meme-me mam.

Application fiiQa-lm' u t 20,1324. seams. 7333390.

To all whom it mag ;c0n0ern:

'Be it known that I, JOHN H. MCLEQD,'.a

citizen ,of the United States, residing' at ,Stockton, ;c oiinty of San Joaquin, State or" California, have invented .certainnew and useful ,Improvements inv @Paralflel =Valve- Sprii' gLitters and ,I. do declare the followingztoibea full, clear, and exactdescr ption otsame, reference being hadto the accompanying drawings, .and to (the characters of reference marked thereon, which fforni a ,pm

of .this application.

, This invent on relates (to. improvements ,in

devices. :for compressing the springs of the valves. of gas engines, while said springs, are grill :in" place, (in order to {enable the springcupho ding means to .be;removed from the valve stem, and the valve then \WlthdITHIWII from'the engine. I

The (principal objectofmy invention is to ,provide a device for the .purpose so constructed that the cup ,in which one end of the spring seats, will be moved along the stem parallel to itsinormalpositionregard- .lBSS-idf the distance which sai d cup is moved and the spring compressed.

The spring will also ofcorifsefbe (compressed without lateral deflection, andthe valve stem can thereforebe easilyturned 11 1 or withdrawn gfrom the cup and sprmgwvrthout any binding between the stem and .the

otherfparts beinghad.

Another objectds to provide a safety lock or catch means .on thedevice-zso arranged that .whenonce compressed, a spri ngiwillbe maintained .in ,that positionwlt'hout danger I physical effort on the part of the operator being necessary.

A further object of the invention is to produce a simple and inexpensive device and yet one which will be exceedingly efitective for the purpose for which it is designed.

These objects I accomplish by means of such structure and relative arrangement of ,erence indicate l'correspondilig ,parts willfj fully:appearby va' perusal of [the {following specification and claims.

In the drawings similar characters of ref parts ind'the severailviews; l a

iFig. 1is aside viewofthe tool, showing the actual spring compressing'members in their closed .or. adjacent positions, and as linitially ,placedlinlconnection with a valve Sp s I Fig. 2,1sfa s milar view, y-showm-g said members separated and the spring .com-

gpressed' to expose the, spring-cup lock.

3 is top .pan view or ,the spring- :cup engaging member ofthe tool.

. Referring ,now -:n1or 'e particularly to .the characters of reference. on the;v drawings, the jinnneralsil and 2 .denote a -pair or, symmetricaland rigid bars, having atone end .rork d orslotted heads 3 and .4,:.forming I jaws which are (disposed at an angle :to {the m jor. portions lofithehars so .thatwhen the heads, are abutted, the bars will diverge from eachother.

The head 3 is recessed @around its opening as at5, the bottoin of this recesslbeingisubjstan ially parallel to" the outer face". of the head .4. v L Y s 'Proj ecting"v betweenlthe bars [from the ends .f thereof opposite'the heads are; cooperating ,and.:symin-etrical handle members 6 and "7 said Ilianfdle ,membersbeing pivoted to each other intermediate their ends, abut .not crossed, as indicated at f 8, .lVhenthe heads are abutted," the innerfends .of the handle inen ibfer's are likewise. abvutted against each other. The handlebar Gthen rests against V the inner ffacQQfithe bar 1, while the handle bar? ,res'ts against the inner face of the handle barsfthereffore fjdiverge from each other, outwa'rdlyofthe pivot 8, as do the bars 1 and 2. The actual hand grip portions 9 ofthe handle members of course extend beyond the ends of the bars 1 and 2.

The inner ends of the handle members 6 and 7 are pivoted onto the bars 1 and 2 respectively, as shown at 10. Between the handle 7, outwardly of the pivot 8, and the outer end of the bar 1, link means 11 extend, pivoted at both ends, while similar link means 12 similarl dis osed extend between i a y a I the bar 6 and bar 2.

The distance from the pivots 10 to the pivot 8 is the same as from said pivot 8 to the pivots of the links 11 and 12 with the members 6 and 7 while the pivots of said links with the bars 1 and 2 lie in a line projected through the first named link pivots.

This arrangement of connection between the handles and bars 1 and 2 causes the latter, when the handles are moved about their main pivot 8, to always move parallel to each other, the heads 3 and 4 of course maintaining their parallel relationship.

To hold the heads at different distances apart against a pressure tending to force them together, I pivot on the handle memher 6, just beyond the outer end of the bar 1, a short bar 13 projecting outwardly of and substantially at right angles to the member 6. This bar, on its face nearest the bar 1, has a plurality of transverse pawlteeth 14 adapted to engage a notch15 cutin the end of the bar 1. A finger pad 16 is provided with the member 13, to enable it to be swung clear of the bar 1, and a spring 17 is disposed between said pad and bar 6.

to force the member 13 toward the end of the bar 1. This locking device is so arranged that the outer ends of the handles may be brought together without interference, but the bar 6 cannot approach the bar 1 unless the pawl member is released from engagement with the bar 1. Since said bars 6 and 1 must move toward each other to bring the heads 3 and 4 together, it will be evident that by thus preventing movement of the bars 6 and 1 in this direction, the heads cannot approach each other.

In operation, the heads are allowed to come together, and the operator, grasping the tool by the handles, slides the heads over the valve stem 18 between the spring seating cup 19 on the stem and the push rod 20, as shown in Fig. 1. Upon the'handles being brought together, the head t will bear on top of the push rod, while the cup 19 will seat in the recess 5 of the head 3, and a sufficient contraction of the handles will cause the cup to be lifted clear of the look ing member 21 on the valve stem, exposing the latter between the heads and permitting of its ready removal. The heads moving parallel to each other, the cup will be raised without deflection from its normal setting,

and hence no binding of the same against the stem will be had.

- From the foregoing description it will be readily seen that I have produced such a device as substantially fulfills the objects ,ed to each other intermediate their ends,

said handle members partially projecting b tween the members and from the ends thereof opposite to the jaws, the handles at their inner ends being pivoted on the members intermediate their ends, and link means pivoted to the handles intermediate the outer ends and the pivotal connection thereof, and to the members, in a manner to cause the members to move in parallel relation to each other with any movement of the handles.

2. A valve-spring lifter comprising a pair of rigid members having jaws at their corresponding ends, cooperating handles pivoted to each other intermediate their ends, said handle members partially projecting be tween the members and from the ends thereof opposite to the jaws, the handles at their inner ends being pivoted on the members intermediate their ends, link means pivoted to the handles intermediate the outer ends and the pivotal connection thereof, and to the members, in relatively opposed relation; the distance from the pivots of the handles with the members to the pivotal connection of the handles themselves being equal to the distance from said pivotal connection to the pivots of the links with the handles, and the pivotal connection of the links with the members being on a line projected through said handle and link pivots.

In testimony whereof I aflix my signature.

JOHN H. MoLEOD.

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