US1488174A - Valve lifter - Google Patents

Description

March 25 ,1924.

M. E. STEVENS VALVE LIFTER Filed July 14 I N VENTOR.

MAC ,3 fezvwss Patented Pillar. 25, 192 5.

. MILTON E. STEVENS, 0F RIVER/DON, NEBRASKA.

VALVE LIFTER.

Application filed July 14, 1823. Serial No. 651,516.

I '0 all whom it may concern.

Be it known that I, MILTON E. STEVENS, a citizen of the United States, residing at Riverton, in the county of Franklin and State of Nebraska, have invented certain new and useful Improvements in Valve Lifters, of which the following is a specification, reference being had to the accompanying drawings.

This invention relates to valve lifters and more particularly to a device for compressing the springs of valves so that the retaining pins of the valve can be removed and the valves themselves accordingly removed.

An important object of the invention is to provide a device of this character which is locked against movement in any adjusted position and whichmay be readily moved from one adjusted position to another.

A further object of the invention is to provide a device of this character for simul' taneously lifting a plurality of valves, the device being of such construction that it may not be removed until the valve grinding operation has been completed and the valves are ready to receive their springs.

A still further object of the invention is to provide a device of this character which may be very cheaply produced, which will be Simple and durable in its construction and a general improvement in the art.

These and other objects I attain by the construction shown in the accompanying drawings wherein for the purpose of il1ustration is shown a preferred embodiment of my invention and wherein Figure 1 is a side elevation partially in section showing a valve lifter constructed in accordance with my invention in use;

Figure 2 is an enlarged side elevation the valve lifter detached; 7

Figure 3 is a plan view thereof; and

Figure 1 is an enlarged detail view showv ing the lifting section proper.

Referring now more particularly to the drawings, the numeral 10 designates a sta tionary frame comprising a pair of spaced strap metal bars 11 and 12 which are vertically arranged and connected to one another by transversely extending bars 13, which bars serve to maintain the proper spaced relation between the vertical bars, a bar 13 being arranged upon each side of the bars 11 and 12 at both the top and bottom thereof. The lower end of the bar 12 is provided with an oiiset extension 14 rigidly connected therewith, preferably formed as a part of the same bar, which extension has a fiat lower face having a reduced teat 15 for engagement in one of the bolt holes 16 of the engine block after the'head thereof has been removed. The lower end of the bar 11 is extended slightly below the lower transverse bars 13, as at 17, for a purpose presently to appear.

It will be noted that between the pairs of bars 13 and the bars 11 and 12 guide 0penings are thus formed in the stationary structure and through these guide openings a shiftable bar. 18 is directed which is provided intermediate the bars 13 at one side of the stationary frame with a cam 19 in the form of a disk eccentrically pivoted to the shiftable bar as at 20. This disk is pro vided with a notch 21, for a purpose presently to appear, and at the side of the notch remote from the notch with relation to the pivot 20 with a handle 22, which handle is laterally ofi'set as at 23. Pivoted to the extension 17 of the bar 11 is a rigid member 2% having an angular end portion 25 extending into the notch 21 of the disk cam 19.

It will be seen that the cam 19 being eccentrically pivoted to the shiftable bar 18 will engage against the upper surface of the adjacent transverse bar 13 during movement of the handle in one direction and will cause the bar 18 to be vertically shifted, this vertical shifting providing the movement necessary to compress the spring. During movement of the bar in the opposite direction the engagement of the angular portion 25 of the rigid member 24 and the notch 21 will cause the yoke to'be moved upwardly upon the extension bar thus increasing the dis tance between the lower end of the yoke or stationary frame 10 and the lower end of the bar, this movement permitting expansion of the springs. The lower end of the bar 18 is provided with any suitable valve spring engaging means. In the present instance I have disclosed this means as an elongated bar 26 riveted or otherwise fixedly secured to an angular extension 27 on the lower end of the bar 18. To the ends of the bar are secured braces 28, the opposite ends of which are secured to the bar 18, as at 29. This bar has formed therein a plurality of notches 30 spaced from one another a distance equal to the distance between adjacent valve stems of the engine with which. the device is adapted for use and corresponding in number to 1* the engine.

the number of valve stems which are arranged in series. The structure at present illustrated is particularly adapted for use with engines of the type employed in Ford automobiles and Fordson tractors but may, of course, be altered to permit its use with other engines.

In the use of the device the teeth 15 are engaged in the bolt opening which will be found in the top of the engine block when the head is removed and which is located between two of the engine valves, the flat lower end of the offset portion resting against the engine head. The bar 18 in application is extended to separate the extension lt and lifting bar 26 the greatest possible distance and this lifting bar is then engaged with the valve stems 31'below the spring seats 82 thereof. By shifting the arm 22 in the proper direction the bar 26 will approach the offset extension let of the bar 11 and cause the springs to be compressed, so that the pins employed for retaining the spring seats 32 in position may be removed, after which the valves themselves may be removed for inspection. If upon inspection it is found necessary to grind the valves this may be done without the necessity of removing the lifter from In use the cam due to wear upon the pivot thereof has a tendency to become slightly loose and I accordingly provide a retainer plate 34, the u er edge of which extends above the upper surface of the transverse bar 13 against which the cam abuts to prevent slipping of the cam from the upper surface of this bar.

Many changes being possible in the construction of the device as hereinbefore set forth without in any manner departing from the spirit of my invention I accordingly do not limit myself to such specific structure except as hereinafter claimed.

I claim 1. In a valve lifter, a yoke embodying vertical members and transverse members connecting said vertical members at the upper and lower ends thereof, one of said vertical members having an engine block engaging extension, a longitudinal movable bar vertically directed through the yoke, a disk cam pivoted to the bar at one side thereof intermediate the transverse memwhereby it may be rotated, said cam abutting one of said transverse members t shift the vertically movable bar through the yoke in one direction,a connection between the cam and yoke shifting the bar through the yoke in the opposite direction, and a valve spring compressin implement carried by the lower end of t e bar.

2. In a valve lifter, a yoke embodying vertical members and transverse members connecting said vertical members at theupper and lower ends thereof, one of said vertical members having an engine block engaging extension, a longitudinal movable bar vertically directed through the yoke, a disk cam pivoted to the bar at one side thereof intermediate the transverse members of the yoke, a handle on said cam whereby it may be rotated, said cam abutting one of said transverse members to shift the vertically movable bar through the yoke in one direction, a connection between the cam and yoke shifting the bar through the yoke in the opposite direction, a valve spring compressing implement carried by the lower end of the bar, and a retainer plate carried by the transverse member abutted by said cam and overlying the edge of the cam to prevent disengagement of the cam from the transverse member.

3. In a valve lifter, a yoke embodying vertical members and transverse members connecting said vertical members at the upper and lower ends thereof, one of said vertical members having an engine block engaging extension, a longitudinal movable bar vertically directed through the yoke, a disk cam pivoted to the bar at one side thereof intermediate the transverse members of the yoke, a handle on said cam whereby it may be rotated, said cam abutting one of said transverse members to shift the vertically movable bar through the yoke inv one direction, aconnection between the cam and yoke shifting the'bar through the yoke in the opposite direction, a valve spring compressing implement carried by the lower end of the bar, the connection between the cam and yoke comprising a rigid member pivotally connected to the yoke and having an angular end portion projecting into a notch formed in said cam. v

In testimony whereof I hereunto afiix my signature.

MILTON E. STEVENS.

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