US1431731A - Valve spring lifter - Google Patents

Description

L. J. GENETT.

VALVE SPRING LIFTER. APPLICATION man mmsl, m9.

Patented Oct. 10, 1922.

penis snnn'rr, itnnannrrn, lrrroriisan,

haw lmi a aeerenonoronnirntr To JOHN ivr.

I nonernan, are, or ivmnennr'rn, nn e-an.

VALVE SPRING LIFTER.

'0, all whontifimay concern-f i Bewit known that 1, Lou s J. Gnnn'rr, a citizen OlEth(-3.Uni,ted States, residing at Marquette, in the county of Marquette and a, j the State .of Michigan, have invented certain ncwand useful Improvements in Valve Springlntters, 01 which the following is a specification, reference being had to the accOm nymg drawings, forming a part thereof, 1 1 i -;The purpose of this invention is to provide a tool orappliance tofacilitate the re- 1 movalxofthe poppetvalves from an internal shown in the combustion engine, lt consists in'the elements and features of construction and their combination hereinafter described and u drawings and as indicated by the claims. j U-Inthe .drawingsi a j {-Figure- 1 is aside elevation with certain par-ts insection illustrating a device embodymg islnvention,

Figure 2 is a, detail section taken as cated 1ine2 2 OnFigure 1. i

, Figure 3,,is itgdlttlil plansection taken as indicated liI leBk-S on Figure 1. igure 1 shows, in dotted outline a portion of the cylinder and valvechamber of a 3 an internal combijistion engine or similar machine, i d cated 1 a an 1 s ocia ed therewith a poppet valve,B, andits stem 13 shown full line, Ordinarilyeach of said valves is provided with a spring, C, reacting between a seat as and, on the cylinder casting, and a flange or collar',l), associated with theend of thevalve stem, B distant from its head, 3, such spring tending to hold the valve closed, or to return it to'closed position after its actuat on by the usual cam meohanisim ot shown; The valve actuating mechanism *usuallyincludes a tappet member" of which a fragmentisshown at, E, to

gether with: an adjusting screw, ll, through which movement is transmitted from the i tappet, E, to; the valve stem, B The collar,

D,-isstolpped on the valve; stem, B by it shapedretainer, G, which is merely a disc having a central aperture and, a radialslot or notch ,leadlng, therefrom to engage a groove, ldfiin the valve stem, the disc, G, "heingmlimensioned to fit in counterbored recess, D in thelower side of the collar, D.

so as not to be removable from the valve stemexcept by raising the collar, D, out of engagement with said disc, a

hol

ing substantially in the plane of the arm, 3

Application filed March 31, 1919. Serial No. 286,330.

It is, something of a problem to accomplish this disengagement ofthe parts while they are under stressof the spring, G, and forthis purpose the device embodying this invention is provided. It consists of a rigid frame member, 1, preferably formed with a handle or hand hold at; 2, and including a rigid arm, 3, extending approximately at rightangles to the portion having the hand 2, and continuous with the upper end of said portion while, atfthe lower end thereof, there ispivotedan arin,l4@, extendwithiits free end movable toward and frond the extended end of saidarm, 3. The arms, 3 and 4,,arefitted with jaws, that provided on the arm, 8, being in theform of a conically pointed member, 5, having a bifurcated shank, 6,which is slidably carried on a slotted 1 guideway, 7, formed on the lend of the arm, 3,acl an1p screw, 8,eXtending through the slot, 9, for adjustably securing it. The adjustment thus provided is toward and from the opposite jaw carried by the arm, 4, said jaw being in the form of a bifurcated plate, 10, with its two arms, 11, spaced apart to extend under the collar, D, in contact therewith outside of its counterbored recess, D1 and therefore out of engagement with the disc, Gr, therein. Pins, 12, maybe providedin theupper face of each arm, 11, at points to engage opposite sides of the col lar, D, for centering the latter with respect to the opening between the arms, 11, and a, third pin, 13, similarly servesto locate the collar,-D, longitudinally of the said opening between arms, 11. This pin,13, may also project downwardly into a hole in the materiatofthe arm, 4, for positioning the plate,

10, thereon, a screw, 14, being provided for detachably securing the plate, so that'if de sired it may be readily replaced with a simi lar plate of slightly modified dimensions and with different spacing of the pins, 12 and 13, to fit a collar, D, of different size.

For forcing the arm, 41, toward the arm, 3, to compress the spring, C, when the pointedljaw member, member, 10, are adjusted as shown in Figure 1, there is provided a link, 15, preferably bifurcated at its upper and lower ends, and there provided with pivots, 16 and 17, respectively. At the upper end, the pivot, 16, engages in an eccentric hole, in a circularlyiformedl cam, 18,'which is rotatively engaged 5, andthe bifurcated jaw in a circular notch or cradle,-19, in the upper edge of the arm, 3, some distance back from its end to which the cone polnt, 5, is

secured. A second and similar cradle or notch, 20, may be provided still farther back on said arm, 3, for receiving the cam, 18, if

it is desired to alter the initial spacing of the partsv in adjusting the device to various designs of engines. The cam, 18, is provided with an operating handle, 21, which is stopped against the edge of the arm, 3, at either limit of rotation of said cam, 18; said arm or handle, 21, being so formed as to limit such rotation to approximately 180, so that this movement will carry the pivot, 16, from its lower position shown in full lineson Figure 1, to an upper position indicated in dotted lines, at which the line of thestress in the link member, 15, passes the enter of the cam member, 18, at the side of said center from which the handle, 21, then extends in engagement with the rigid frame member, this eccentric relation of the parts serving to lock them in this position.

The pivotal connection of the lower end of the link, 15,-t0 the pivoted arm, 4, is preferably made by means of a block, 22, which constitutes the lower pivot bearing, said block being formed with a tooth, 23, adapted to engage any one of a series of notches, 24, provided in the lower edge of the arm, 4, so that the block, 22, and with it the pivot, 17, may be longitudinally adjusted along said arm, 4, to vary the initial distance between the jaw members, 5 and 10. The tooth,'23, of block, 22, is yieldingly held in engagement withsuch notch, 24, of the ,a'rm by means of a. spring, 25, stretched between said-arm and an extension, 26, on the lower} end of the frame member,-l.

Further adjustment of the efiective length of the link, 15, maybe had by providing a series'of pivot apertures, 27, for the pivot, 17, at the lower end of the link, and a like series of apertures, 28, for the upper pivot, 16; and further, by forming in the lower end of the frame member, 1, a series of notches, 29, to receive the fulcrum pivot, 30, of the arm, 4, this point may be made quickly adjustable to adapt the device to a wide variety of engine dimensions.

'From the foregoing description, it will ibe'clearthat the device is operative by first applying the cone member, 5, to the head of the valve, B, which is usually already provided witha slight conical recess,or, if no such "recess exists, the point, 5, being suitably hardened and tempered, will form sucha recess upon being lightly tapped with a hammer, and will thus be secured against slipping out of position. The arms,

'11, of the jaw, 10, are then placed under thecollar, D, with their'opening clearing the disc, G, and the cam member, 18, is ret'ated by its handle,21, to the position shown in dotted line, whereby the arm, 4, is swung upward about its fulcrum pivot, 30, to position also illustrated in dotted line, thus compressing the spring, C, and carrying the collar, D, away from the disc, G. Said disc may then be removed from its engagement with the valve stem groove, B", whereupon the cam, 18, is rotated back to its initial position, lowering the arm, 4, slackening the spring, G, permitting the arms, 11, on the jaw, 10, to be slidably withdrawn from the collar, D, and the cone point, 5, to be removel from the head of the valve, so that the valve may be lifted out through the opening, H, in the valve chamber. After the desired work has been done upon the valve, or its seat, the parts may be replaced, the spring, U, being slightly compressed by hand in order to lift the collar, D, sufficiently for insertion of the bifurcated jaw, 10, under it, and the spring being furthercompressed by actuation of the cam, 18, to permit replacement of the retaining disc, G, in the groove, 13, in the valve stem.

I claim 1. A valve-spring lifter comprising a frame member, a pair of arms substal'itially parallel to each other, each arm having at its termination a jaw removably secured thereto, one arm rigid with the frame, said frame extending downwardly from said rigid arm, the other arm adjustably connected directly to the frame at the lower end thereof, said connected arm, which is arranged to extend under the valve spring, having contractile means connected thereto for drawing the jaws toward each other to compress the spring.

2. In a valve spring lifter as set out in claim 1,'said contractile means comprising a link connected to the adjustable arm and a cam fulcrumed on the frame engaging said link.

3. A valve spring lifter comprising a frame member with a rigid arm extending transversely therefrom, an arm pivotally carried on said frame and extending transversely therefrom substantially in the plane of the rigid arm, said two arms carrying relatively opposed jaws; a link pivotal y engaged with the pivotally carried arm, and an eccentric member journaled on said link and bearing on the rigid arm for contracting the jaws by its rotation. 4. In a valve spring lifter as set out in claim 3, a plurality of seats for said eccentric on the rigid arm at different distances from its jaw.

5. In a valve spring lifter as set out in claim 3, the pivotal engagement of the link with the arm being effected by means adjust-able toward and from the jaw of said arm.

. 6. In a valve spring lifter as set out in claim 1, the frame having near its lower end a plurality of open slots and the adjustable arm having a rigid pin adaptedfor selectively engaging said slots.

7. A valve spring lifter comprising a frame member having a rigid arm extending transversely therefrom; an arm hinged to said frame member extending transversely therefrom substantially in the plane of the rigid arm, said two arms carrying relatively opposed jaws, means connecting the two arms intermediate the hinge pivotand the jaw of one arm, said means including a pivoted eccentric member bearing on a seat provided on one of the arms, and means for rocking the eccentric on its pivot, the other arm being pivotally engaged with the connecting means by a member which is adjustable along said arm, and means for retaining said adjustable member against displacement therealong.

8. In the construction defined in claim 7 the arm which engages the eccentric member having a plurality of seats therefor at different distances along the arm from its jaw.

9. In a valve spring lifter as set out in claim 1, a spring reacting between the adjustable arm and the frame for yieldingly holding the jaws apart.

10. In a valve spring lifter as set out in claim 1., said contractile means comprising a link with a toothed member pivoted on one end, the adjustable arm being hinged to the frame and having a series of notches along its edge to selectively engage the tooth of said member for adjusting the pointof connection of the link along said arm.

11. A valve spring lifter comprising a frame member and a rigid arm extending transversely therefrom; an arm pivotally carried on said frame and extending transversely therefrom substantially in the plane of the rigid arm, said two arms carrying relatively opposed jaws with a link pivotally connected to said arms and a cam interposed at one of the pivotal connections with means for adjusting said cam to vary the effective length of the link.

12. In a valve spring lifter as set out in claim a, said frame having a series of notches at different distances from the jaw which is carried by the frame, and each adapted to i receive the pivot of said pivoted arm, to

permit varying the initial distance between the jaws.

13. In a valve spring lifter as set out in claim 4;, said frame having a series of notches at different distances from the jaw which is carried by the frame, and each adapted to receive the pivot of said pivoted arm to permit varying the initial distance between the jaws, together with a spring tensioned between the frame and said pivoted arm for yieldingly holding such pivot in one of said notches.

In testimony whereof, I have hereunto set my hand at Chicago, Illinois, this 26th day of March, 1919.

LOUIS GENETT;

Images