US1619870A - Valve-spring compressor - Google Patents

Description

Mmh s, 1927.

R. J. KIRKPATRICK VALVE SPRING COMPRESSOR.`

Filed may 2, 192e RJ [diri/patriot Patented Mar. 8, 1927.

UNITED STATES RICHARD J'. KIRKPTRICK, 0F DODGE CITY, KANSAS.

VALVE-SPRING coMPnnssoR.

Application filed May 29, 1926. Serial No. 112,660,

The valves of internal combustion engines are usually seated by coil springs of the eX- pansible type and when such valvesare required to be removed or replaced it is necessary to compress the valve spring to admit of the spring confining pin being removed from or replaced in the opening of the valve stein.

Therefore, it is the purpose of this invention to provide a tool which may be readily applied to or removed from the valve stem and which admits of the valve spring being compressed and retained in such position during the release, the removal and the re` placement of the valve, if needs be.

ihile the drawings illustrate a preferred embodiment of the invention, it is to be understood that in adapting the means .to meet specific needs and requirements, the design may be varied and such other changes in the minor details of construction may be resorted to within the scope of the invention as claimed, without departing from the spirit thereof.

For full understanding of the invention and the merits thereof, reference is to be had to the following description and the drawings hereto attached, in which,-

Fig 1 is a side view of a valve-spring compressor embodying the invention, showing the same applied, and having parts broken away and in section;

Fig. 2 is a rear elevation of the tool;

Fig. 3 is a detail sectional view on the line 3-3 of Fig. 1, looking in the direction of the arrows;

Fig. 4 is a detail sectional view of the lower portion of the spring on the 'line 4-4 of Fig. 1, the parts being shown on a larger scale; and

Fig. 5 is a detail sectional view on the line 5-5 of Fig. 4, looking in the direction of the arrows.

Corresponding and like parts are referred to in the following description and designated in the several views of the drawings by like reference characters. n

The tool comprises 'a frame including spaced bars or members 1 and a yoke 2 connecting the bars 1 at one end, said yoke having an inturned flange 3 to pass between the coils of a valve spring and sustain the compressive force. A. U-shaped lever 4 is pivoted at one end to the free ends of the bars 1, as indicated at 5, and the pivotal connection of the lever is adjustable to admit of adapting the tool to different types of valves. The pivotal connection 5 consists of a bolt and a spacing sleeve is mounted thereon to maintain the ends of the bars 1 and members of the lever 4 spaced apart. a predetermined The yoke 2 is approximately of V distance. semi-circular outline to fit about one-half of the valve spring and theinturned flange 3 is of corresponding fcrmation to engage adjacent coils of the valve spring in a manner to sustain the end thrust when said spring is compressed, said inturned iiangc fitting around the guide and the valve stem operating therein.

A runner is slidably mounted upon the bars 1 of the frame and comprises guides 7 and a cross-piece 8 connecting the lower ends of the guides and centrally apertured for the passage of the valve stem and spring conning pin. The guides 7 have their longitudinal edge portions recurved so as to loosely embrace edge portions of the bars 1. The guides 7 and cross piece 8 are preferably of integral formation. Links 9 pivotally connect the runner to the operating lever, and

lower ends of the links being pivoted to the lower ends of the guides 7 adjacent the crosspiece 8, as indicated at 10. The upper ends of the links 9`are connected to the members of the lever 4, as indicated at 11, and the portion of the members between the pivot connections 5 and 11 is deflected so that when the free end of the lever 4 is depressed to compress the valve spring the three pivot connections 5, 11 and 10 aline, thereby retaining the lever in the adjusted position with the valve spring compressed.

Referring to Fig. 1 oft-he drawings, the` numeral 12 designates the stem of a valve and 13 the coil spring cooperating therewith. The valve spring 13 is shown confined ben tween the guide 14 and cup-washer 15.

When the tool is in position for compressing the valve spring 13 the flange 3 of the yoke 2 is introduced between adjacent coils of the spring so as to engage a part of the engine and the cross piece 8 is positioned to receive the end of the valve stem 12 and engage the cup washer 15. Upon pressing the free end of the lever 4 towards the bars 1 the runner is lowered, thereby compressing that part of the spring 13 disposed between the i'iange 3 and the cross-piece 8. When the valve spring is fully compressed the free end of the lever 4 engages the bars 1 of the frame end the pivot connections 5, ll and lO are about in line, so that the spring is retained in compressed position, thereby edmitting of the pin or key 16 being removed, Wliereby the valve is released to be ground, or otherwise operated upon, "as will be readily understood.

Having thus described the invention, l claim:

l. A valve-spring compressor, comprising e frame, including spaced members and a yoke connectingthe members end having e portion to engage the coils of the spring` to be compressed, e runner slidably mounted upon the spaced members of the frame and including` a cross-piece adapted to transmit the compressing force to the spring, en operating lever pivoted to tbe Said iframe, and links connecting,` the operating' lever Witli seid runner, the pivot connections between the moving parte being adapted to eline to retain the spring; when compressed.

2. A valve spring compressor, comprising a frame including spaced members, i yoke connecting tbe members at one end and lieving an inturned lzinge, e runner comprising guides slidably mounted upon lsaid spaced members7 and a cross-piece connecting said guides, an operating lever pivoted to tbe free ends oi the4 before-mentioned spaced members, and linksv connecting the operating lever to said runner.

3. A valve s ring compressor, comprising zr frame inclucing'spaced members and a yoke lconnecting` the members at one end and having an inturned flange, a runner comprising e cross-piece and guides, the letter slidably mounted upon seid spaced members, e U-sliaped lever having its members pivoted to the spaced members oft' the freine, and links connectingthe members. of the lever to the guides oi the runner.

4. A vrilvespring compressor comprising spaced bers, e yoke conneUsing` the bers at one end and Vlieving en inturned flange, guides slidably mounted iipontlie seid bers, e cross-piece connecting the guides at one end, a U-shaped lever, a pivot connecting the members of the lever with t-lie spaced bars,e spacing sleeve on seid pvot to meintein the bars in spaced relation, and links connecting the members'oftlie lever with the seid guides.

In testimony rvliereol I afiix my Signature.

RICHARD J. KIRKPATRCK. [n s]

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