US2577474A - Valve lifter - Google Patents

Description

R. G. MILLER VALVE LIFTER Dec. 4, 1951 Filed May 12, 194'? INVENTOR.

neg Q MY/er ATTD RN EYE Patented Dec. 4, 1951 UNITED STATES PATENT OFFICE VALVE LIFTER Roy G. Miller, Tacoma, Wash.

Application May 12, 1947, Serial No. 747,477

6 Claims. 29-221) This invention relates to a valve lifter'for valves of internal combustion engines. I This application is a continuation-in-part of my copending application Serial No. 671,605, filed May 22, 1946, now abandoned.

It is an object of the present invention to provide a valve lifter which is adjustable to give added leverage to the same and so as to better fit the lifter to the particular valve arrangement and engine being worked upon.

Other objects of the present invention are to provide a valve lifter which is of simple construction, durable in use and efficient in operation.

For other objects and for a better understanding of the invention, reference may be had to the following detailed description taken in connection with the accompanying drawing, in which Fig. 1 is a side elevational view of the lifter applied to a valve spring and in a locked condition to retain the spring in the raised position allowing freedom of the hands to remove the spring lock plate on the valve stem.

Fig. 2 is a fragmentary top plan view of the lifter as viewed on line 2-2 of Fig. 1.

Fig. 3 is a detail perspective view of the ad iustable pivot block for the foot.

Fig. 4 is a perspective view of the foot adapted to be connected to the engine block.

Fig. 5 is a side elevational view showing the pivot block connected to the foot.

Referring now to the figures, It] represents an engine block with an opening H in the. side thereof through which access is had to a valve l2.

This valve has a stem and on this stem there is connected a spring I3. On lifting the spring l3 a spring retainer or locking element which is held in the groove l 4 on the stem can be removed whereby to release the valve and permit its withdrawal from the top of the engine block.

To efiect this result I have provided a valve lifter l5 which can be inserted through the opening H and adaptedto raise and retain the spring IS in a compressed condition. This lifter comprises an arm or upper handle I 6 which is pivoted as indicated at IT to an arm or lower handle l8. Both of these arms have handle portions l9 adapted to be brought together when the lifting or spring-compressing operation is effected. Extending upwardly from the arm H} are extensions 2| located respectively at opposite sides of the arm l6 and curved to better adapt the same for insertion through the opening I l.. Each of these extensions has a spring SL631??? thereon including an upwardly extending pore tion 23. These extensions are held in transversely spaced relationship by an adjusting screw'24. By turning the adjusting screw the valve lifter can be adapted to different width springs. The arm It has a laterally extending pin 23' .over which the extensions 2! are extended. The lower edges of the extensions have notches 25 adapted to receive the transversely extending pin 23'. Spring means 21 fixed to the arm It as indicated at 28 bears against the ex-.- tensions 2! to retain them over the transversely extending pivot pin 23'- These extensions 21 can accordingly be advanced or retracted to better condition them for application with the spring [3. The rear ends of the extension 2| have elongated slots 28' through which a retain Vine pin 29 in the arm l8 extends. "I

To anchor the tool to the engine block, there is provided a foot member or support 3| adapted to extend vertically across the opening II. This foot member has a bifurcated portion 32 on its lower end and has a plurality of holes 33 into which a pivot block, Fig. 3, as indicated at 34 may be extended and secured by a cotter pin 35. The pivot block can be disposed on the foot 31 at difierent elevations depending upon the type of engine being worked upon. On opposite sides of the pivot block 34 there are connected links 3'! having elongated slots 38 at their rear ends through which extends a pin 39 for connecting the same to the arm 16. On these links 31 is a spring 4| which reacts between the links and the foot'Sl for maintaining the same pivoted against an adjustable stop 42 in the forward end of the arm It. An internally threaded projection 43 is provided on the arms l6 for the purpose of centralizing spring seat 22 with valve stem [2.

In order to retain the handle portions after they have been drawn together, there is provided on the handle portion of the arm IS a link or pivotally mounted ratchet arm 45 pivotally connected as indicated at 46 to the handle 19, On the handle of the arm 18 is a spring catch 41 adapted to engage with ratchet portions 48; thereon. This catch or pawl 41 has a handle 49 which can be used to disengage the catch 41 from the ratchet links 45.

The notches 25 on the underside of the arm l6 permit adjustment of the bifurcated portion 32 so as to be squarely under the spring which it is to lift. However, there are but five of these notches, which will not permit the desired amount of adjustment. Further adjustment of the bifurcated portion 32 can be obtained by use of the threaded projection 43, the general function being similar to that which might be found in tuning a radio where some station may be punched in and then a truer tune-in obtained by the use of an auxiliary permitting a finer graduation of adjustment.

While various changes may be made in the detail construction, it shall be understood that such changes shall be within the spirit and scope of the present invention as defined by the appended claims.

I claim:

1. In a valve lifting tool, the combination which comprises a pair of spaced parallel bars having oppositely positioned flanged segments, on the outer ends providing a valve spring gripping jaw with the said segments providing spring seats, said parallel bars having elongated slots in their outer ends, a thumb screw extended through the bars spaced from the segments for adjustably holding the jaws in spaced relation, said bars having arcuate intermediate sections therein with spaced notches in the under edges of the said intermediate sections, an upper handle positioned with the inner end thereof between the said parallel bars and having a pin extended through the inner end and positioned with the ends thereof extended for engagement with the notches of the said parallel bars, said upper handle having a thumb screw threaded in the inner end thereof and extended between the said parallel bars, links having slots in the outer ends positioned beyond the sides of the parallel bars, a pin carried by the inner ends of the links, said upper handle having studs on the sides thereof extended through the slots of the links and having a lug extended from the under surface and positioned midway of the length thereof, a lower handle having a lug on the upper surface and positioned with the inner end thereof pivotally mounted on the pin carried by the inner ends of the links, said lower handle having a pin therethrough with ends of the pin extending at the sides and positioned in the slots in the ends of the parallel bars, a pin pivotally connecting the said upper and lower handles through the lugs thereon, ratchet links pivotally mounted on the upper handle and depending therefrom, a spring catch pivotally mounted on the lower handle and positioned to coact with the ratchet links for retaining the handles in adjusted positions, a vertically disposed support having a foot on the lower end extended between the said parallel bars and positioned to coact with the thumb screw in the inner end of the upper handle to adjust the position of the spring seats in relation to a spring to be held thereby, and means adjustably mounting the said pin carried by the links on the said support.

2. A valve lifter adapted to be inserted through an opening in the block of an engine, said valve lifter comprising upper and lower lever arms pivotally interengaged intermediate their ends, link members interconnecting the lever arms and slidably engaging the same, one of the link members projecting outwardly a spaced distance from the upper lever arm and having thereon means for engaging a valve spring, and a support member pivotally connected to the forward terminal portion of the lower lever arm and engageable with the lower edge of the opening in the engine block, the support member having thereon a stem portion adapted to span the opening and to bear against the block adjacent the upper end of the opening, thereby positioning the spring engaging means precisely with respect to the valve spring, the link members and their connections with the lever arms providing movement in parallel planes of the spring engaging means and support memher.

3. A valve lifter adapted to be inserted through an opening in the block of an engine, the valve lifter comprising upper and lower lever arms. means for pivotally interengaging the lever arms intermediate their ends, link members interconnecting the lever arms and slidably engaging the same, one of the link members projecting outwardly a spaced distance from the upper lever arm and having thereon means for engaging a valve spring, a support member engageable with the engine block, the link members and their connections .with the lever arms providing movement in parallel planes of the spring engaging means and the support member, the support member having thereon a perforated stem portion adapted to span the opening and to bear against the block adjacent the upper end of the opening, a pivot block adapted to be inserted in a selected one of the perforations on the stem portion of the support member, and means for pivotally connecting the pivot block to the lower lever arm.

4; A'valve lifter adapted to be inserted through an opening in the block of an engine, said valve lifter comprising upper and lower lever arms, pivot means for pivotally interconnecting the lever arms intermediate their ends, link members interconnecting the lever arms and slidably engaging the same, one of the link membersprojecting outwardly a spaced distance from the upper lever arm and having thereon means for engaging a valve spring, a support member pivotally connected to the forward terminal portion of the lower lever arm and engageable with the engine block, the support member having thereon a stem portion adapted to span the opening and to bear against the block adjacent the upper end of the opening, the link members and their connections with the lever arms providing movement in parallel planes of the spring engaging means and the support member, and screw means mounted on the upper lever arm and bearing against the stem portion of the support member for positioning the spring engaging means a selected but variable distance forwardly with respect to the upper lever arm.

5. A valve lifter adapted to be inserted through an opening in the block of an engine, the valve lifter comprising an upper lever arm bifurcated at its upper terminal portion, a lower lever arm, pivot means for pivotally interconnecting the lever arms intermediate their ends, link members interconnecting the lever arms and slidably engaging the same, one of the link members projecting outwardly a spaced distance from the upper lever arm and having thereon means for engaging a valve spring, a support member pivotally connected to the forward terminal portion of the lower lever arm and engageable with the lower edge of the opening in the engine block, the support member having thereon a stem portion adapted to span the opening, the link members andtheir connections with the lever arms providing movement in parallel planesof the spring engaging means and support member, a transverse bar extending across the bifurcated portion of the upper lever arm, and a screw threaded into the transverse bar and adapted to contact the stem of the support bar for positioning the spring engaging means a selected distance forwardly with respect to the upper lever arm.

6. A valve litter adapted to be inserted through an opening in the block of an engine, said valve lifter comprising upper and lower lever arms, pivot means for pivotally interconnecting the lever arms intermediate their ends, link members interconencting the lever arms and slidably engaging'the same, one of the link members projecting outwardly a spaced distance from the upper lever arm and having thereon means for engaginga valve spring, a support member piv- 10 otally connected to the'forward terminal portion of the lower lever arm and engageable with the lower edge of the opening in the engine block, the support member having thereon a stem portion adapted to span the opening and to bear against the block adjacent the upper end of the opening, the link members and their connections with the lever arms providing movement in parallel planes of the spring engaging means and the support member, screw means mounted on the upper lever arm and bearing against the stem portion of the support member for positioning the spring engaging means a selected but variable distance forwardly with respect to the upper lever arm, and resilient means mounted on the lower lever arm and bearing against the support member for maintaining the stem of the same normall: contacting the screw means.

ROY G. MIHJLER.

7 REFERENCES crrnn The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,299,496 Melrose Apr. 8, 1919 1,322,433 Harsley Nov. 18, 1919 1,352,407 Guinand Sept. 7, 1920 1,718,841 Touchette June 25, 1929 1,815,980 Kulp et al July 28, 1931 1,890,466 Lemmerman Dec. 13, 1932 2,064,264 Kulp Dec. 15, 1936 FOREIGN PATENTS Number Country Date 210,588 Great Britain Feb. 7, 1924 236,722 Great Britain July 16, 1925 271,289

Great Britain May 26, 1927

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