US1572059A - Valve-spring-lifting mechanism - Google Patents

Description

Feb- 9 Q I M. woop VALVE SPRING LIFTING MECHANISM Filed Nov. 15 1922 2 Sheets-Sheet 1 a 2:2. \wl Fr:

.* kw- L J Patented tee. a 1926.

LOUIS M. wocn, or new mm, 1-I.Y., assienets r0 semen-o Iit L'rieLn VALVE LIFTER ,A'l tlhill tltEFifiE.

conrona'rron, or nnw roan, n. Y., A oonroaarrolv or new YonK.

VALVE-SPRIhl'G-LIFTING MECHANISM.

Application filed November To all whom it may concern Be it known that I, LOUlS M. 7001), a citizen of the United States, residing at IIQ'GW York city, in the county of'New York and State of New .York, have invented certain new and useful Improvements in Valve- Spring-Lifting Mechanism, of which the following is a specification.

This invention relates to valve spring lifting mechanism for internal combustion engines, an objectlof the invention being to provide an in'iproved mechanism for elevating and maintaining under compression a pluralitv of valve springs, which mechanism will be relatively simple in construction, relatively inexpensive to manufacture,

easy to opeate, and eiiicient and effective for the purposes for which it is designed.

A further object of this invention is to provide mechanism for elevating under. compression the valve springs of the engine, the mechanism having improved means for compressing the valve springs by cam action,

thereby minimizing the power neeessary to operate the mechanism. v

A. further ob ect of this invention is to provide an improved. lifting bar for valve spring lifting mechanism, the bar being improved manner.

A further object of this invention is to provide lifting mechanism for valve springs having improved means for maintaining the neclianism in elevated position with the valve springs held under compression.

A further object of this inventionis to provide an improved valve spring lifting lever having one or more cam surfaces adapted to coact with a lifting member for facilitating the operation thereof.

Other objects of this invention will appeia in the following description thereof, reference being had to the accompanying drawings forming a part of this specification, wherein like reference characters;indicate correspondin parts in the several views and wherein Fig. 1 is a front view in elevation illustrating'an en'ibodiment of my improved mechanism adapted for use with a four cylinder engine; Fig. 2 is a sectional elevation guided with relation to the. springs in an 15, 1922. Serial No. 601,090.

taken substantially on lines 2-.-'2 of Fig 1; 'r 1g. 3 s a fragmentary sectionalelevation illustrating the mechanism. 111 elevated position; Fig. i is a perspective view of the lifting member; Fig. 5 is a fragmentary end view of the lifting member in elevated position; Fig. 6 is a fragmentary detail view of a formiof lifting lever; Fig. 7 is a detail view partly in section of a modified form of lifting member; and is a detail sectional view taken through one end of the lifting meniiber.

In the drawings .1 have illustrated a presplate being held in position by a suitable stud 0r bolt 5(land nut 51. Thevalve spring chamber 9 is located within a housing .or casing comprising a rear wall 10 and forwardly extending end walls 1.1, the latter adapted to form guide means for the valve spring lifter bar as hereinafter described. The front of the valve spring housing is also provided with the usual depending hp or flan 'e 12 extendiin alon the to) ed e s b a b thereoi andan upwardly prtuectmg lip or flange 13 extending along thelower edge thereof. The cover plate is bolted against the outer faces of the flanges 12 and 13, and hereinafter shown the lower flange or lip 23 is utilized as a means for fulcruming the iftiug lever. The valves 14; are providcd 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 in normal position, the seats '17 being constructed to receive the ends of the valve springs 18 which areheld between the upper wall of the chamber 9 and the seats 17. The lower wall of the chamber 9 isprovided with the usual guide members 19 through which the valve lifters 2O extend,v the latter being operated by suitable cams on the camshaft of the engine,

The lifting member for the present mecha- 21 and forming a part thereof.v At suitable" intervals the member 23 is provided with recesses 24 adapted to freely embrace the valve stems 15 and permit the seating of the retainers 17 on the uppersurfaces of the mem.

her 23. The latter is also provided with re cesses 25 for permitting the lifting bar to clear the guide sleeves 19.

Intermediatethe ends of the bar 21, the

latter is "preferably enlarged at 26 and a verticalguide slot 27 is formed therein. The.

rear of the lifting bar 21 is also enlarged and reinforced at 28 through which extends a vertical guide slot 29 registering with the guide slot 27 and a horizontal guide slot 30 also registering therewith. Adjacent to theopposite ends of the lifting bar a pair of slots 31 are provided, and within each slot is pivoted at 34 a locking or supporting member or leg -35 having at the lower endthereof a notch or detent 35. Itwill be noted that the upper edge 36 of each locking member 35 e: :te nds at a predeten I mined angle so that when the member or supportingleg 35 is swung outwardlv as shown in Fig. 8, the inclined edge 32 of the slot 31 will form a stop against which the edge 36 impinges. The lower inclined edge 33 of the slot 31 also forms a stop for limiting the rearward swinging of the member 35. p

-The supporting latches or legs are automatically swung into various positions by means of springs 37 pivoted to the bar 21 as by means of screws 33. The springs 37 may be provided at the free'ends thereof with suitable thumb pier-cs3!) engaging notched or recessed edges 39 formed :in the mean bers 35, so that upon swinging the springs 37 so that the thumb pieces 39 will engage theupper part of the recesses the members will be swung outwardly by the action of the springs, and upon shifting the springs sothat the thumb pieces will be located at the lower part of the recesses 39, the members will be swung inwardly by the action of the springs. Thus the springs will swing the members either outwardly orinwardly depending uponwh ether the ends 39 engage the members 35 above or below the pivots 34. v

The lifting bar 21 is operated by means of a lever 40, which in the present instance is provided with fork or bifurcated ends 41 having the. upper. edges 42 thereof curved or inclined to form cam surfaces. The exand the pins 16 replaced.

As illustrated inFig. 7 the bar '21 may be provided with a spring retainer engaging portion 44' suitably recessed at 46 so as to freely embrace the valve stems 15. These re .cesses are countersunk to provide counterrecesses terminating invalve spring retainer seats 45, which arepreferablv curved or shaped so as to correspond to the shape of thespring retainers 17 and into which the retainers are seated. .The seats 45, it will therefore be seen, form guides for receiving and centering the retainers 1'7, and therefore assist in guiding the lifting bar 21 with re lation to the valve springs 18.

. 1n the operation of the present improved liftingmechanism the nut 51 on the outer end of the stud or bolt 50 is removed for the purpose of removing the cover plate and lifting bar 21 placed in position with the bolt 50 extending through the guide slots 27 and 29. :The nut 51 is then screwed onto the end of the bolt.50, the portions 23 or 44 ofthe-liftingbar 21 extending under the valve spring retainer seats 17 and against which the latter are seated. The thumb pieces 39 of the springs 37 are then shifted to the lower portions of the guide recesses 39 and the lever 40 placed in position as illustrated in Fig. 2-. Upon swinging the handle of lever 40 upwardly, the curved or inclined cam surfaces 42 willengage the rounded cam surface 43 at the under side of the bar 21, thereby lifting or elevating the bar 21 and lifting the springs 18 simultaneously under compression. During this operation the :am surfaces 42 will be shifted over and relatively to the cam surface 43 and the construction of these surfaces re duces considerably the amount of power necessary to lift and. compress the valve springs. Also during this operation the springs 37 urge the locking members 35 against the lip or flange 13, and when the notches 35 register with the upper edge of the lip 13 the springs will swing the members 35 inwardly to the, position illustrated in Figs. 8 and 5, the members 35 thus locking and supporting the bar 21 in, elevated position. The lever 40 may. then be removed and the operator may readily remove the re taining pins 16 and the valves 14. .After the grinding operation the valves are reinserted 'lhereupon the lever 40 is again placed in position and the thumb pieces39ofsprings 37 shifted to the upper'ends of the guide recesses 39 so that upon lifting the bar 21 slightly by means of the lever the springs 37 will swing the locking members 85 outwardly with the notches 35 free of the lip or flange 13. The expansion of i the valve springs will then lower the bar at and reseat the valve spring seats 17 on the retaining pins 16.

It will be 'notedthat the guide portions 22, at the ends of the lifting bar 21, engage the housing in front of the valve springs and are guided thereby in a vertical plane, thus preventing the lifting bar from shifting inwardly during the operation of the lifting lever. Furthermore the guide slots 27, 29, and 30 embrace the bolt or stud 50, and without exerting any substantial pressure ti1ereagainst enable the lifting bar to be centered with relation to the retaining seats 17 and also guide the lifting bar againstendwise' movement during operation. Furthermore the seats d5, as shown in'Fig. 7, are adapted to form guides for receiving the valve spring seats 17 and for permitting the lifting bar 21. to be guided with relation to the springs 18, and valve stems 15.

It will be understood that by describing in detail herein any particular form, structure or arrangement it is not intended to limit the invention beyond the terms of the several claims or the requirements of the prior art.

I claim as my invention:

l. Ina valve spring lifter, the combination of a lifting bar having means for operating against a plurality of valve springs, and an operating member supported for operation by the engine beneath said lifting bar, said bar having a curved cam portion and said member having a cam shiftable into engagen'ient with said cam portion for elevating said lifting bar.

2. in a valve spring lifter, the combination of a lifting member adaptedto extend beneath a plurality of valve springs, and means supported for operation by the engine beneath said lifting member for elevating said member and comprising a detachable operating n'ieirdier, said lifting member and means having enacting curved cam surfaces.

3. In a valve spring lifter, the combination of a lifting member, means for operating said lifting member against the valve springs and comprising a plurality of cams operating against said lifting member, and an operating handle for said cams.

i. In a valve spring lifter, the combination of a lifting member havingmeans operative beneath the valve I springs for lifting'the same, means for operating said member and con'iprising a pair of spaced cams having lifting engagement with said member, and'a single operating means for controlling said cams.

5. In a valve spring lifting mechanism, the combination of a lifting member comprising beyond the end of said vertical a vertical portion and a horizontal portion operable against the valve springs, said member having acurved cam surface, and means supported for operation by the engine and engaging said cam surface for lifting .the member. yy r 6,. Valve spring lifting mechanism eomprising an angle bar having horizontal and verticalportions, said vertical portion having a guide portion projecting longitudinally 7 portion and also below the same. i

7. In a valve spring lifter the combination of a lifting bar having means for operating against a plurality of valve springs, and means supported for operation by the engine beneath said lifting bar for elevating the same, said means comprising a curved cam fulcrumed independently of said bar and shiftable transversely thereof for elevating the same;

8. A lifting bar for valve spring mechanism having a plurality of guide portions of greater width than the bar, one of said por-i tions having a vertical guide slot and one thereof having shiftable locking means extending thereinto.

9. A'lifting bar for valve spring lifting mechanism having a pair of transversely extending guide slots for receiving a housing belt of the engine.

10. A lifting bar for valve spring lifting mechanism having intermediate the ends thereof an enlarged portion provided with transverse guide slots adapted to receive the housingbolt of an engine. y 11; In a lifting member for valve spring lifting mechanism, an angle bar comprising a vertically disposed portion having a vertical guide slot for embracing a stud or bolt.

12. A. lifting member for valve spring lifting mechanism comprising an angle bar formed from a pair of transversely extending members, one tl'iereof having recesses for embracing a plurality of valve stems, said members llaving con'mim'iicating guide slots.

13. In a valve spring litter the combination of a lifting bar having means for opei'- ating against a plurality of valve springs,

means for elevating said bar, swinging loo-k ing means for maintaining the bar in elevated position, and means for limiting. the swinging movement thereof.

Ll. In a valve spring lifter, the combination of a lifting member operative against a plurality of valve springs, means for lifting the same, a shiftable locking support for said member, and resilient means shiftably engaging said support for shifting the same.

15. In a valve spring lifting mechanism, a lifting member, a swinging support pivoted thereto, and means adapted toengage said support at opposite sides of the pivot for swinging the same. i Y

16. In a valve spring lifting mechanism,

the combination of a lifting member comprising a vertical portion and a horizontal portion extending beneath aplurality of valve springs, an operating member sup- 5 ported for operation by the engine; and a cam controlled by said operating member and shiftable in-toposition for elevating said liftingmember. I 7

17. In 21 valve spring lifter the combina- 10 tion of an angle bar comprising a vertical portion and ahorizontal portion, one thereof having a curved cam portion, and cam means supported for operation by the engine for operating said angle bar and comprising a detaehable operating member and a cum controlled thereby and engageable with said curved cam portion.

Signed at New York city, N. Y., this 4th day of November, 1922.

V LOUIS M. lVOOD.

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