US1436663A - Valve-spring-lifting device - Google Patents

Description

A. LOVELESS;

VALVE SPRING'LIFTlNG DEVICE.

APPLICATION FILED MAR. 8. 1.921.

Patented Nov. 28, 1922.

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VALVE SPRING LIFTING DEVICE. mwucmwm man MAR. 8. 1921.

Patented Nov. 28; 1 922.

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WITNESSES Patented Nov. 28, 1922.

UNlTEQ ALBERT LOVELESS, OF ABERDEEN, WASHINGTON.

VALVE-SPRING-LIFTING DEVICE.

Application filed March 8, 1921. Serial No. 450685.

To. all whom it may concern:

Be it known that I, ALB RT Lovnnnss, a citizen of the United States, and a resident of Aberdeen, in the county of Grays Harbor and State of Washington, have invented cer" tain new and useful Improvements in Valve- Spring-Lifting Devices, of which the following is a specification. 1 Iy invention relates to devices for lifting the springs of poppet valves to permit the removal, of the valve seat pins, such devices being commonly known as valve lifting devices. f

The purpose of my invention is the provision of a valve lifting device by means of which one or more valve springs can be readily compressed to disengaging position with respect to the valve seat pins, and maintained in such compressed position without necessitating the manual holding of any portion of the deviceso that the operators hands are free to withdraw the pins.

. I will describe one form of valve lifting device embodying my invention and will then point out the novel features thereof in claims.

In the accompanying drawings: a

Figure 1 is a view showing in side elevation a portion of an internal combustion engine having applied thereto two of the valve lifting devices embodying. my invention.

Figures 2 and 3 are vertical sectional views taken on the lines 22 and 3--3, re spectively, of Figure 1.

Figure 4 is an enlarged detail perspective view of the yoke comprised in the device shown in the preceding views.

Figure 5 are enlarged detail perspective views of the spindle and nut comprised in the device shown in the preceding views.

Figure 6 is a perspective view of one form of wrench adapted for the actuationof the nut of the device.

Similar reference characters refer to similar parts in each of the several views.

Referring specifically to the drawings and particularly to Figure 4, my invention in its' present embodiment comprises a yoke designated generally at Y and formed of a metallic angle bar to provide a vertical portion 15 and a horizontal portion 16. The opposite ends of the vertical portion 15 have secured thereto by means of rivets l l, spacing blocks 17, while formed. at regular spaced intervals throughout the length of such portion are circular openings 18 which function as wingitudinal edge of the portion so as to provide entrance passages for inserting the valve stems into the openings 19. Intermediate its ends, the portion 16 is formed with a relatively small opening 16? beneath which is secured a lug L. i

The valve lifting device also includes a spindle designated at 'S and which isscrew threaded for a major portion of its length to receivean adjusting nut N. shown in Figure 5, the spindle S is bifurcated at one end to provide a pair of relatively long positioning lips 21, while the opposite end is slotted transversely to provide relatively short positioning lips 22.

In Figures 1, 2 and 3,1 have shown a portion of a conventional form of internal combustion engine in which one side thereof is formed with the usual. chambers designated at C designed for the purpose of gaining accessto the valve springs and pins. As usual, the edges of the chamber C are formed with flanges,the upper flange being designated at 28, the lower flange at 28 and the end flanges at 28. The valves-terns are designated at 23, and are surrounded by springs 24, the lower ends of which latter repose on seats The valve seats 25 in turn engage the pins 26, and the usual push rods 27 extend inwardly into the chambers and are associatedwith the valve stems in the manner shown. y i y In the applied position of the valve lifting device to either of the chambers G, the yoke Y is applied to the valve stems 23 so that the latter are disposed. within the open ings 19, it being understood that-the stems pass through the entrance passages E JOto en'- ter the openings. As so applied, the horizontal portion 16 of the yoke is interposed between the upper end of the push rods 27 and the seats 25 in the manner clearly shown in Figures 2 and 3. The diameter of the openings 19 exceeds the length of the pins 26 so with the yoke in applied position to the seats 25, the pins 26 are not engaged by the horizontal portion 16 of the yoke thus allowing the free upward movement of the yoke without engaging the pins. In the applied position of the yoke, the spacing blocks 17 engage the flanges 28 and thus maintain the vertical portion 15 in definite spaced relation to the springs 24 of the valves so that the yoke can move forwardly without contacting with the valve springs.

In the application of the spindle S, it is inserted through the lug L and the opening 16 and moved to occupy a vertical position so that its upper positioning lips 21 engage the upper flange 28 while its lower lips 22 engage the flange 28 thereby rigidly se curing the spindle in vertical position. WVith the nut N positioned upon the spindle as shown in Figures 1 and 3, it will, when ro tated in the proper direction, effect the elevation of the yoke as a whole thereby causing the portion 16 to engage and lift the several valve spring seats 25. After the yoke hasbeen moved from its initial position to its upper and final position as shown in Figure 1, the springs 24 have been completely compressed so that the pins 26 are no'wfree to be withdrawn from the valve stems. It is to be particularly noted that all of the valve spring seats can be held in elevated position without necessitating the manual holding of any part of the device so that the operators hands are free to withdraw the pins. Furthermore, the compression of the several valve springs is uniform throughout so that the normal tension of the springs is maintained thus insuring the proper operation of the valves when the springs are again extended and moved into normal position.

a In Figure 6 I have shown a suitable form of wrench adapted to effect rotation of the nut N. This wrench is designated generally at W and includes an open ended socket 29 formed on one end of a handle 30.

Although I have herein shown anddescribed only one form otvalvc lifting device and wrench, each embodying my in vention, it is to be understood. that various changes and modifications may be made herein without departing from the spirit of the invention and the spirit and scopeof the appended claims.

What I claim is: 1. A device for simultaneously compressing a plurality of valve springs. which consists of a yoke inclusiveof vertical and horizontal plates, the horizontal. plate being provided with valve stem receiving openings and the vertical plate being provided with sight openings affording a view of the spring and the valve stem, a vertical spindle extending through said horizontal plate and having its ends slotted to define pairs of attaching lugs adapted to securely engage portions of the engine whereby to hold the spindle against rotation, and an adjusting nut threaded on saidspindle and adapted for holding the yoke in aset position whereby the valve springs may be heldT compressed during removal and attachment of the valve.

2. A device for'simultaneously compressing a plurality of valvesprings, which consists ofa yoke inclusive of vertical and horizontal plates, the horizontal plate being providedwith valve stem receiving openings, a vertical, spindle extending through said horizontal plate and having its ends provided with pairs of attaching lugs adapted to securely engage portions of theengine, and an adjusting nut threaded on said spindle and adapted for holding theyoke in a set position whereby the valve springs may be held compressed during removal and attachment of the valve, the vertical plate of said yoke extending beyond the horizontal plate whereby to' form a means for holding the yoke against transverse tilting.

'3. A device for simultaneously compress ing a plurality of valve springs, which con sists of a yoke inclusive of vertical and horizontal plates, the horizontal plate being provided with valve stem receiving openings and the vertical plate being provided with sight openings affording a view of the spring and the valve stem, a spindle extending through saidhorizontal plate and provided with pairs oil attaching lugs adapted to securely engage portions of the engine, an adjusting nut. threaded on said spindle and adapted for holding the yoke in a set position whereby the valve springs may be held compressed during removal and attachment of the valve, and spacing blocks carried by the ends of said vertical plate and forming a means to hold the yoke against transverse tilting.

ALBERT LQVELESS.

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