US1760725A - Valve tool - Google Patents

Description

, y 0- J. c. STRIBLING 1,760,725

VAL E TOOL Filed April 5, 1929 IN VEN TOR.

ATTORNEYS.

Patented May 27, 1930 UNITED STATES PATENT oF icE JESSE C. STRIBLING, OF ANDERSON,'SOUTH CAROLINA, ASSIGNOR E ONE-HALF TO RALPH J". EAMER, 0F ANDERSON, SOUTH CAROLINA vALvn 'rooL Application filed April 5,

This invention relates to improvements in Valve-displacing devices, such as are employed to facilitate the removal of poppetvalves. In a valve of this type, it is normally held closed on its seat by a coiled spring on its stem,interposed between an abutment and a washer held on the extremity of the valve stem by a cotter pin passing through the stem. As the spring is under compression, the pressure against the cotter pin prevents a ready withdrawal of the pin when it is desired to dismount the valve. One of the objects of the present invention is to provide a device that is operative to compress the spring to relieve the cotter pin of the pressure so that it can be easily removed and the dismounting of the valve thereby facilitated. The device or tool for carrying out this object is described in detail hereinafter, pointed out in the appended claims and illustrated by the accomanying drawing.

In the accompanying, in which similar reference characters designate correspond ing parts,

Figure 1 is a side elevation of a tool em bodying the invention, showing the same operatively mounted to compress the spring of a poppet-valve of an explosive engine, the proportionate size of the tool being exces sive to illustrate the tool to better advantage.

of Fig. 1.

Figures 3, 4, 5 and 6, are detail perspective Views, respectively showing the claw-actuating spring, the latch, the claw and the bracket.

Referring to the drawings in detail, 5 designates a part of an engine casing, in which is mounted the poppet-valve 6, the casing being broken away to show the valve. On the stem 7 of the valve is a spiral spring 8 compressed between an abutment formed by the engine casing and the washer 9 held on the lower end of the valve stem by the cotter pin 10 passing through the stem. The spring, under compression between the abutment and the washer, normally tends to hold the valve on its seat. When it is desired to dismount the valve for grinding and other purposes, the cotter pin must be removed to free the valve stem from the washer 1929. Serial No. 352,804.

and spring so that the stem can he slipped through the casing part to displace the valve. To compress the spring preliminary to the removal of the cotter pin, the instant valve tool is provided and is particularly adapted to the purpose.

The operative partsof the valve tool are mounted on a main-frame or support comprising arms 11 and 12, respectively, angular.- ly disposed to each other. With the tool in operative position, as shown in Fig. 1, the horizontal arm 11 has a downwardly turned end provided with a shoe 13 adapted to en gage the under side-of the valve 6. On the vertical arm 12 'is slidably mounted the bracket 14. This bracket consists of a strip of metal bent at an intermediate-part to form parallel sides in longitudinal extension of i the bracket. Between these parallel sides is welded'the elongated block 15 to hold the sides in spaced relation and to stiffen the bracket. At an end of the bracket, the block 15 and the adjacent end wall of the bracket form a socket 16 fitting somewhat closely the arm 12 to maintain the bracket laterally extended from said arm. In the inner edge of the arm 12 is a series of'notches 17. A catch 18 is pivoted to the block 15 to engage the notches 17 to hold the bracket in its adjustments on the arm 12. Figure 2 is a sectional view on the line 22 Mounted on the upper side of the bracket 14 1s the claw 19 extending the same general direction as the bracket, theclaw being U- shape in cross-section. At one end theclaw enters between the sides of the bracket 14 above the block 15. A pin 20 passing through the sides of the bracket and the interposed end of the claw, pivots the claw to the bracket adjacent to the sliding connection ofthe bracket with the arm 12. At its free end, which is forked as shown in Fig. 2, the claw extends beyond the outer end of the bracket. A spring 21 is pivoted at an intermediate part between the sides of the claw by the pin 22. This spring bears at its respective ends against the arm 12 and the claw 19 and normally tends to-press the claw toward the bracket.

Straddling the outer end'of the bracket 14 is the bifurcated lever 23, pivoted thereto by the pin 24. This lever is angularly bent adjacent to its pivotal connection with the bracket to provide the comparatively long operating handle 25 and the comparatively short arm 26. Extending across the free end moval of a cotter pin, the bracket His adjusted on the arm 12 0f the support so that the arm 11 and the claw l9.are approximately parallel with the shoe 13. positioned to contact with the upper side of the val-v'e 6 and the'claw opposite to the upper endof the valve stem 7 WVith the parts so adjusted andthe handle 25 turned downward, the free end of the claw is forced between the washer 9 and the cotter pin lO with the recessed end of the claw straddling the valve stem, and the shoe 13 is placed above the valve 6. l/Vith the several parts so adjusted and positioned, as shown in Fig. 1, by means of the handle 25 the operating lever 25 is turned to the dotted line position. This movement of the operatinglever causes the short arm 26', through the pin 27, to effect a c amming action on the claw 19 and forcesthe free end-of the latter upward. This upward movement of the claw comprises the spring 8 sothat the cotter pin 11 is relieved of the pressure of the spring'and can be readily removed. After the cotter pin has been removed, the

operating lever 25, is turned back to. the full linevposition and-the device isdetached from the valve. Whenthisis done the valve can be readily removed from-the engine casing. In replacingthe valve,the device'is employed to compress the spring so, that the cotter pin canbe readily inserted in the valve stem. With the tool mounted as shown in Fig. '1 and the operative parts moved to dotted line ,positions, the tool is clamped in place so that both hands can be employed to remove the cotter pin.

YVhat I claim is: 1, In a valve-displacing device, the comb nation with a support comprising angularlyjdisposed arms, one of said .armshaving an abutment at its extremity,the other arm having a series of notches spacedalong said arm, of a bracket havinga socketat one end nation with a support comprising angularly v disposed arms, one of said arms having an abutment at its extremity, of a bracket having a socket slidable on the other of said arms,- said socket operating to'maintain the bracket approximately parallel to the arm having the abutment, means for holding the bracket in its adjustments on the arm carrying said bracket, a'claw pivoted to the bracket to operate at its free end in opposition to the abutment, a spring mounted on-theclaw and b ing against the support, said spring normally tending to press the claw toward the bracket,

and a lever pivoted to the bracket and having an angularly disposed arm engaging the free end of the'claw,-said lever arm being actuated by movement of the lever to effect a camm-ing actionon the, claw to move the latter toward the abutment a ainst' thela'ction of theis ring and a'utoniat'icilly locking in'this' osit onl' In testimony whereof I aflix my. si nature.

JESSE (l STRI IN G.

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