US1603735A

US1603735A - Lifter for valve springs

Info

Publication number: US1603735A
Application number: US684272A
Authority: US
Inventors: Wood Louis Marcellus
Original assignee: SPEED O MULTIPLE VALVE LIFTER
Current assignee: SPEED O MULTIPLE VALVE LIFTER; SPEED-O MULTIPLE VALVE LIFTER Corp
Priority date: 1924-01-04
Filing date: 1924-01-04
Publication date: 1926-10-19
Anticipated expiration: 1943-10-19

Description

Oct. 19 1926.

' L. M. WOOD LIFTER FOR VALVE SPRINGS 2 sheetssheet 1 Filed Jan. 4, 1924 RW@ www mf f m A 1 n..- ,nu ....HHU HAMM o V Q 1 j WW HMI- r1! B @w n u il@ um Q@ ,f Nm QW FQ, I QN HT; bw l) 4NI iufm? u n n.. u u n u @l QM 1 1 1i r w.

Oct. 19 1926.

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narra sf'ra'rs Parnu-r LG?) 1S MAECEI'LLUS YORK.

Woon, or*- NEW YORK. n, Y.. Assrofnoa To srnnn-o MU'nrrrLi-i' vanvn nrr'rnn oonronn'rron. or new renie.. n. Y.. a. oonronarrorior eine! LIFTER FR VALVE SEEENGS.

Application iiled. January This invention relates to lifters adapted for the purpose of lifting or elevating under con'ipression a plurality of valve springs in internal combustion engines, and more particularly to lifters adapt-,ed to siimilt'aneously lift a multiple number' of valve springe7 an object of the invention being to provide an improved valve spring lifter which vv'ill be relative-ly simple in construction, relatively easy and cheap to manu'fact'ureyand'so con'- structed that a number of valve springs may' be elevated under compression With a kmini-Y mum of cfl'ort and Without the exertion of any considerable amount of strength.

A further object of thisl invention is to provide a valve spring lifter having improved cam means forI lifting the valve springs of the engine under compression whereby in operation the force exerted by the cam means ivill be so applied and dierected as to elevate the lifting member in a substantially straight vertical plane7 thereby limiting any material tendency of the lift' ing member to move or shift' relatively tothe valves during operation.

A further object of this invention is to" ency of the littingm'ember to shift in transverse directions relatively to the valves during operation.

Other objects of this invention vWill appear in the following description and aps pended claims, reference being had to the accompanying drawings forming a part. of this specification wherein like refer-ence characters indicate co'rres'ponding` parts'in' the several views and wherein Fig. l is a front elevation illustrating an embodiment of my invention inoperative position; Fig., 2 is a tially on line .2-2 of Fig. l; Figi 3 is a ginent'ary sectional sideeljevation taken ou seccional side elevation taken substane serial no. Geneva line 3 3 of Fig. l and illustrating the valve springs 1n lifted' position; Fig. l is a p`ersp'ective view illustrating a present embodiment of my invention; Fig. 5 is a perspec tive vieiv of a cam member; Fig. 6 is a fragmentary longitudinal sect-ion taken through the cam block and illustrating the position of one ofthe cams with the lifting member in eleva-ted position, andv Figiv is atransverse section taken substantially on line 7-7 of Fig. 6. n

n Before explaining in detail the present improvement and mode ofvoperation there of, I desire to have itunderstood that the invention'is not limited-tothe details of construction and arrangement of parts WhichA are illustrated in the accompanying drawings, since the invention is capable of other embodiments, and that thev phraseology which I employ is for the purpose of de scription and not of'limit-ation.

rEhe present improved mechanism for elevating or liftingunder compression the several valve springs of the engine is of course, adapted to be used in connection with various types ofv engines. and although one form of' engine is herein illustrated by Way of enample it is obvious that. the mechan,i "i may be adapted to other engines having di .'erent numbers of cylinders. It is also understood that the form and design ofthe mechanism may be altered in order to adapt the mecha n ism to different engines having different forms vand arrangement of parts.

Referring to. the drawings wherein a present preferred form of myv invention is( shown, it will be seen that the engine block is provided? With the usual valve spring chamber 9 which is adapted to be closed at the front thereof with a suitable cover or door plate (not shown). The cover plate in the engine illustrated herein by vvay of ezrample is held in lposition by means oi'k a ixedfbolt orstud'() having a nut ladapted to be'screyvedon tothe outer end of the bolt l or' stud; ln soineinstancesthe cover or door plate is held in positionv means of a bolt ornstud which is headed at. its outer end and adapted to be screwed Vinto the rear' ivall of thevalvespring chamber. The valve spring l chamber 9`is located Within` a housing or casing comprising rear cylinder xvallsj l0 and forwardly extending `end Walls l rlheA front of the'` valve: spring housing is also providedwith a dependingy lipV l2 and also with the usual upwardly projecting lip or flange 13 extending along the lower edge thereof and against which the cover or door plate is normally bolted. The valves 14 are provided with valve stems 15 which extend into the chamber 9, and adjacent to the lower ends of the valve stems are located retaining pins 16 against which the valve spring retaining seats 17 impinge when the valve springs are in normal position, the seats or retainers 17 being constructed to receive the lower ends of the valve springs 18 which are held between the retainers and the upper wall of the chamber 9. The bottom of the valve spring housing is provided with the usual guide members or bearings 19 through which the valve lifters 20 extend, the latter being operated by cams on the cam shaft of the engine for the purpose of operating the valves.

The valve lifter in the present instance is preferably in the form of an angle bar which may be readily made in a single casting, the angle bar comprising a vertically extending member 21 and a horizontally eX- tending member 22. The part 21 of the angle bar extends across or in front of the four valves and valve springs, and the horizontal part 22 of the bar forms a means adapted to extend beneath the valve springs and retainers for operating thereagainst. Centrally of the lifter the member 21 is provided with a. rearward extension or enlarged portion 23` and the member 22 is provided with an enlarged portion 24, the

parts

23 and 24 being cast integrally. rlhe central enlarged portion 23 of the lifting member is provided with a vertical guide slot 25 which communicates with a horizontally extending slot or groove 26 formed in the central eXtensi'on 24 of the lifting member. The purpose and function of the slots 25 and 26 are to receive the housing bolt and to permit the lifting member to be guided by such bolt against endwise movement relatively to the valve springs, and also to enable the lifting member to be readily positioned with relation to the valve springs.

The rear face of the central portion 23 of the lifting member is recessed at 27, and at the bottom of such recess a pair of projections or abutments 28 are formed, the projections 28 being located at opposite sides of the guide slot 25. These projections are bored to permit the passage therethrough of the gu-fle screws as hereinafter described.

The horizontal member 22 of the lifter is provided at suitable intervals with rearwardly extending slots or recesses 29 into which the valve stems extend, the sides of the recesses 29 forming seats .for the valve spring retainers 17.

It will be noted that the valve spring recesses 29 extend rearwardly the full width Of the horizontal member 22, and that these recesses or slots terminate at the rear thereof in vertically extending recesses 30 formed in the vertical member 21 of the lifting bar. It will be seen that an important advantage is derived for forming the valve spring re cesses 29, 30 in this manner, since it is posrsible for the operator after the valve lifter has been elevated against the valve springs to insert the fingers for the purpose of removing the pins 1G or replacing them.

The lifting member in the present intance is operated by a cam means which comprises a suitable supporting block 31 having a transversely extending slot or groove 32 for receiving a rotatable spindle 33. The spindle 33 is provided with a pair of spaced cams 34, each cam at one side having a curved working face 35 terminating in an approximately flat face 35a. It will be seen that the spindle 33 carrying the spaced cams has a bearing in the cam block 31 and is adapted to be rotated for the purpose of swinging the cams from a horizontal to a vertical position, and vice versa, by means of a suitable wrench 52 which may be inserted over the .squared end 37 of the spindle or shank It will be noted that the transverse slot or recess 32 is open at the top thereby permitting the spindle 33 to be readily inserted therein and removed. It will also be noted that the supporting block 31 is provided at one side with a pair of spaced slots 31a for receiving and housingl the cams 34 when the latter are shifted downwardly into the position shown in Fig. 4, thereby causing the lifting bar to rest upon the upper face of the cam block when in lowered position.

At opposite sides of the spindle 33 the cam block 31 is tapped to provide a pair of holes into which are screwed a pair of guide screws or pins 38` these screws extending freely through holes in the projections 28 and in the .extension 24. Between the heads of the .screws 38 and the upper faces of projections 28 are located a pair of coiled springs 39. These springs function normally to force the upper face of the cam block 31 against the lower face of the extension 24, thus holding these-parts 4together rigidly when the lifting device is not in use and when it is being placed in position under the valve springs.

In using the present valve lifter the nut 51 is unscrew-ed from the end of the stud bolt 50 and the cover or door plate for1 the valve spring housing removed. The angle bar is then slipped over the stud bolt 50, it being understood that the latter extends through the guide slot 25 as shown in Fig. 1, whereupon the nut 51 is screwed on to the end of the bolt 50 sufficiently to hold the valve lifter in proper position. The v-.irench 52 is inserted over the squared end 3?' of spindle 33, and by manipulating the wrench.

IUS

means for normally maintaining said member and cam means together.

6. In a valve spring lifter, the combination of a lifting bar constructed to simultaneously cooperate with a plurality of valve springs, a supporting block located below said lifting bar, means for shiftably connecting said lifting bar with said block, and rotatable cam means located above the supporting block and below the lifting bar and pivotally supported therebetween cross wise of the lifting bar and operative on the rotation thereof to lift said lifting bar relative to said supporting block, said cam means comprising a plurality of cams spaced transversely of the lifting bar.

7. A valve spring lifter comprising a lifting member, a support, a spindle carried thereby and having a wrench-engaging portion and a pair of spaced cams carried by said spindle, said cams being in position and operating as a unit against the lifting member directly under the line of engagement of the lifting member with the bottoms of the valve springs thereby to elevate the lifting member whereby the action of the cams is exerted directly under and between the margins of the springs.

8. A valve spring lifter comprising a lifting member, a support, a cam carried thereby for elevating said lifting member and a spring carrying member connecting said lifting member and support.

9. A valve spring lifter comprising a lifting member having means adapted to eX- tend beneath a plurality of valve springs, said member having c-entrally thereof a vertical slot adapted to receive an engine stud or bolt, a support, and a cam carried there" by for elevating said member, said support being connected centrally to said lifting member.

10. A valve spring lifter comprising a lifting member having a vertically extending guide slot adapted to receive a housing stud or bolt, cam means operative adjacentto said slot for elevating said member, and guide means for connecting said cam means and member together.

11. A valve spring lifter comprising a .cam block having a transverse recess, a rotatable spindle having a bearing in said recess, a pair of spaced cams carried by said spindle, and a lifting member controlled by said cams.

12. A valve spring lifter comprising a cam lock having a transverse recess. a rotatable spindle having a bearin in said recess, a pair of spaced cams carried by said spindle, and a lifting member controlled by said cams, each of said cams having at one side a curved working face terminating in an end portion having a working face of less curvature.

13, A valve spring lifter comprising a lifting member having a guide slot adapter to receive the housing stud or bolt of the engine, cam means for elevating said member, and guide means located at opposite sides of said guide slot for connecting said cam means and member together.

14:, A valve spring lifter comprising a lifting member having a guide slot adapted to receive the housing stud or bolt of the engine, cam means for elevating said meinber, and guide means located at opposite sides of said guide slot for connecting said cam means and member together, said guide means having springs for maintaining said member and cam means in predetermined position.

1 15. A valve spring lifter comprising a lifting member, cam means for elevating the same, and guide means connecting said cani means and member together and located in rear of said cam means.

16. A valve spring lifter comprising a lifting memberl` a support, a cam carried thereby for elevating said lifting member, and a pair of spaced guide members connecting said support and lifting member in rear of said cam.

17. A valve spring lifter comprising a lifting member, a support, a cam carried by said support for elevating the lifting member, and a guide pin slidably connecting said support and lifting member and detachably connected to one thereof.

18, A valve spring lifter comprising a support, a shiftable cam carried thereby for elevating the lifting member, and a vertical member slidably connecting said support and lifting member and having a detachable threaded connection with one thereof.

19. A valve spring lifter comprising a vertical member and a horizontal member, a cam block located beneath said horizontal member, a shiftable cam carried by said block and adapted to Operate against the under face of said horizontal member, a guide pin carried by said cam block and eX- tending through said horizontal member.

20. A valve spring lifter comprising a vertical member and a horizontal member, said vertical member having a guide slot, cam means rlocated beneath said horizontal member and adapted t0 operate thereagainst for elevating the same, a pair of guide pins carried by said cam means and extending through said horizontal member at opposite sides of said guide slot.

21. In a valve spring lifter, the combina` tion of a lifting member, a cam support, a rotatable spindle carried thereby, a cam carried by said spindle for elevating said lifting member, said support having an open slot permitting removal of said spindle.

22. ln a valve spring lifter, the combination of a lifting member, a cam support having a transverse recess open at the top, a rotatalole spindle journal-ed in said recess and recess, a spindle journaled in said transverse a cam carried by said spindle for elevating recess, and a pair of spaced cams carried by said lifting member. said spindle and adapted to be shifted into 10 23. ln a. valve spring lifter, the combina and out of said spaced recesses.

F- tion of a lifting member, a cam support hav- Signed at New York city, N. Y., this 17th ing a transverse recess and a pair of spaced day of December, 1923. recesses communicating with said transverse LOUIS MAROELLUS WOOD.