US1619162A - Valve lifter - Google Patents

Description

Patented Mar. 1, 1927.

UNITE@ .STATS NORBERT J. STBODEL, OF SYRACUSE, NEVI YORK.

VALVE LIFTER.

Application iiled July 2, 1924. Serial No. 73,723.

This invention relates to a device for compressing retracting springs of valves for internal combustion engines to permit said valves to be more easily removed for cleaning, regrinding and other repairs when necessary.

These devices are commonly known as valve litters and generally consist of a pair of hand levers pivoted to each other and provided with cooperative jaws adapted to be wedged between the spring seat and underlying portion of the frame so that when opened, the spring seat will be moved axially lengthwise of the valve rod against Vthe action of its retracting spring to permit the removal of the usual stop pin and valve, but most of these devices with which I am familiar involve the use of three or more parts with more or less complicated mechanisms for adj ustingthe jaws in place and for locking the levers in their open positions.

The main object ofmy present invention is to provide a two-part valve lifter in which both parts are made of comparatively light steel bars or rods which may be easily and quickly forged to the desired form and in which the interlocking connections for holding the jaws open form integral parts of the handles at the extreme ends thereof where the leverage is greatest and the holding power required, the least.

Another ob 'ect is to make both of the jaws substantially alike and tapered or wedgeshaped and comparatively thin so that they may be more easily forced between the spring seat and underlying portion of the engine frame preparatory to compressing the spring for releasing the valve.

Other objects and uses relating to specific parts of the device will be brought out in the following description.

Figure l is a side elevation, partly in section, of a valve lifting device embodying vthe various feat-ures of my invention and shown in operative connection with the valve and adjacent portions of an internal combustion engine.

Figure 2 is an enlarged transverse sectional view of the same device taken on line 2 2, Figure 1.

Figure 3 is a detail sectional'view taken on line 3 3, Figure 1.

In order that this invention may be clearly understood, I have shown a portion of an internal combustion engine -A-' and one of the port-controlling valves B+ having the usual stem -bguided in va suitable opening -ain the portion of the engine frame -A 1 The lower end of the valve is adapted to be engaged by the usual cam-operated Yt-app'et -C which is guidedA in a suitableiopening -ain the engine frame -A-.

The valve stem is provided near its lower end with the usual removal stop pin and seat UZ- for receiving t-heV lower end of a coil spring ,-D- which surrounds the valve stem and has its upper. end seated against the under side of the portion ofthe frame -A- in which the guide opening czis formed. l

The spring seat -CZ- for the lower end of thespring is movable Aaxially and is limited in its downward movement by the pin which also serves to limit the upward movement of the valve -B-.

It is evident however, that by removing the pin the valve -B- may be removed by upward displacement for repairs when desired.

The valve lifter forming the subject mat ter of my invention is adapted Vto lift the spring seat -cZ- against the action of the spring -D- to permit the removal of the pin -band valve -B- and for this purpose is made in two similar L-shaped parts or angle levers -1- and -14-, superposed one upon thefother and having .the portions thereof near the angles as a2-f and -g/-- provided with overlapping lugs 2- and -2-, the adjacent faces of each lug being recessed to receive the other lug and both lugs are pivoted to each other by a pivotal pin -8-.

This pivotal pin constitutes a fulcrum about which Vboth levers are adapted to rock so thatl the handle portions are relatively long and straight while the jaw portions as 4iand -4- are relatively short to enable the spring to be easily compressed by the application of a relatively small amount of power to the outer ends of the handles.

The jaw portions -4- and -lof the levers are offset in the same direction from the handle portion thereof, and are preferably flat and tapered toward their free ends which are provided with lengthwise slots -5- and receiving the adjacent portion of the valve stem -bwhen the jaws are wedged between the spring seat dand underlylng portion ofi thefraine olz the engine as shown in Figure 1.

`-1"- is provided with a laterally olfset hoolteshaped extremity -6 forming;r an integral part thereof and projecting therefrom toward the corresponding end ot the lever -1- which is `preferably round in cross section at its point of engagement with its hooksshaped member -6- so that when the jaws LL and meV- are opened in the `act of lifting the spring seat -danfanist theV act-ion `of the spring -D-, the hookshaped` extremity will he brought into interlocking engagement with the corresponding end ofthue lever -1- for holding `the purs in` their open positions, thus permitting the removal of the stop pin W and valve --B-.

Owing to the length ot the handles olf the levers from their fnleruni pivot -3. the. free ends thereof may7 be readily sprung laterally relatively to each otherto permit the interlocking engagement ot the hook 6M with the eorreslmnding end ol the lever -1-.

The tree ends of the levers -`land -1- move about the axis of the pivot 2lin substantially the same `plane and the end of the hook is disposed in the ath ofi movement of the free end ot the ever -1- so that when the. handles of the leverare closed in the aet` of liftingr the spring seat -flagainst the action of the springr -D-, the free ends of the handles of the levers 1- and --lwill have to be sprung laterally relatively to each other a sutlieient distance to permit the tree end ot the handle olf the lever -1- to enter the recess as -G in the hook --(3m `where it is held b v the free end of said hook `against accidental. opening.

ln releasing the jaws :from their open positions the l'ree ends olf the handles ol the levers may be sprung laterally to disengap'e the 'tree end ol the lever im 'from the recess of the hook -(lthus permittinge:r they handles of the levers to be opened when the jaws -t and --lm are closed h v the distention et the spring Uw.

that I` elaim is:

A valve liftingdevice comprising similar inner and outer levers, each comprising` a relati lv long'` straight handle portieri and a relatively short straight wedge-shaped jaw portion longitudinally hifureatedand extending at an obtuse angle to the handle portion, said handle portions having` pivotally connected lateral ears thereon adjat-ent to but slightlyr spaced from the june ture ol the handle and jaw portions, whereb v the levers are pivotally connected in non- ^rossedrelation so as to permit positioniingn of the jaws horizontally in substantially llatl'v contacting relation for beine' readili7 wedged hetween the lower al'iutnient o't a valve stein spring' and an adjacent fixed part. with the handle portions positioned at a nearly vertical upward and outward inrlination and in slight upwardly divergi'ing` relation, l'or being grasped to press the hanlle portion ot the inner lever outwardly and downivardl)7 toward the handle portion ot the outer level' and to thereby7 raise the jaw portion of the inner lever awayv `l'rom the jaw portion ot the outer lever and compress the valve stem spring.

In witness whereof l have hereunto` set my hand this 12th day ot June, 1925A i NORBERT J. STRGDEL.

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