US1971530A - Valve grinding tool - Google Patents

Description

J Aug. 28,1934. H, w K AL 1,971,530

VALVE GRINDING TOOL Filed July 28, 1932 a mum' M14 Patented Aug. 28, 1934 UNITED STATES PATENT orrics VALVE GRINDING TOOL Harry w. Kulp and Martin 0. Dellinger, Lancaster, Pa, assignors to K-D Manufacturing Company, Lancaster, Pa., a corporation of Pennsylvania Application July 28, 1932, Serial No. 625,488

, 4 Claims.

' of the suction cup type intended for use primarily in connection with the poppet valves of internal combustion engines.

Heretofore it has been common practice to provide the upper end or surface of the valves with a slot or with two recesses to e engaged by the suitably formed end portion of a valve grinding tool whereby the valve might be oscillated to grind it onits seat, but more recently this practice has been discontinued in order to 1 obtain a better balance and more uniform shrinkage and expansion of the valve, with the result that the majority of automobile internal combustion engines now produced are provided with poppet valves having smooth upper surfaces of unbroken area, and consequently with such valves there is no provision for obtainingpositive engagement in alateral direction with the operative end of the valve grinding tool.

To meet this condition recourse has been had to a rubber suction cup suitably mounted on or secured to the lower end of a stick or operating handle which is to be rolled alternately in opposite directions between the operators hands. This has in large measure met the situation, but has been open to the objection that in use around the usual garage the lower surface of the suction cup has become greasy, or in some instances oil has been left upon the upper surface of the poppet valves, with the result that in use the suction cup has crept sidewise or in a radial direction with respect to the valve, so getting the valve grinding tool out ofalignment with the valve stem and also breaking the suction grip of the tool on the upper face of the valve.

In several extensively used automobiles as at present produced the poppet valves of their internal combustion engines have their upper surfaces disposed slightly above the upper surface of the engine block, there being a sharp or abrupt radially outer edge or portion of the respective valves extending at an abrupt angle to, and

upward from, the engine block.

Our present invention has been evolved to avoid the above objections and with the above mentioned construction of the present day automobile internal combustion engine particularly in mind and has for its primary objects to provide as an unitary tool a rubber suction cup valve grinder having'a handle and suction cup associated therewith in combination with a guard means inseparable from said handle and cup while they are associated and adapted to engage the radially outer portions of the poppet valve being operated upon to prevent displacement of the suction cup therefrom; and to providespring means for forcing the guard means down against the inclined surface of an engine block of the multiple cylinder V type motor, said spring means being also inseparable from said cup and handle while they are associated and being maintained in proper operative position by said handle and cup.

It has been found in practice that where the valves of a multiple cylinder V type motor such as the new Ford V-8 are being ground the upper and outer ends of the engine block are at such an angle ,to the horizontal that the guard means will not drop down against the same by gravity.

In this application we show and describe only the preferred embodiment of our invention simply by way of illustration of the practice thereof, as by law required. However, we are well aware that our invention is capable of other and different embodiments and that the various details thereof may be modified in several ways, all with- 30 out departing fromour said invention. Therefore, the drawing and description herein are to be considered as merely illustrative and not as exclusive.

In the accompanying drawing:

Figure 1 represents an exploded perspective 5 View of a valve grinding tool embodying our invention;

'Figure 2, a vertical central sectional view through the suction'cup with its sleeve, in association with the guard and spring, and prior to the association of the handle with the suction D;

Figure 3, a view similar to Fig. 2, but with the suction cup and handle associated or in final assembled condition; and 5 Figure 4, a View similar to Fig. 3, showing the tool as operatively applied and suctionally gripping the upper surface of a poppet valve mounted in an engine block, which is shown in fragmentary section, the spring forcing the guard endwise against the engine block.

Referring now in detail to the drawing, A designates the engine block; B, a valve port thereof;

C, a poppet valve closing said port B and having a stem D extending down through a bu'shingE 1G5 mounted in the valve guide F, all as well known and in extensive use at the present time, and all said parts will be of any well known construction and the bushing E may bea split bushing.

However, the valve head C will be of such thickness and so related to its cooperating seat that it will project slightly upward above the upper face of the engine block A and will have a vertically extending surface presented at an abrupt angle to the adjacent portion of the upper surface of said block A, so as to be positively engaged by the vertically extending adjacent portion of the inner wall of the guard 2, whereby movement of the guard 2 radially inward with relation to the valve head C, beyond the radially outer edge or face thereof will be prevented.

1 designates the usual stick or handle of a suction cup type valve grinding tool, said handle being formed adjacent its lower end with a deep annular groove 6 and with a slightly tapered short shank 5 extending downward beyond said groove 6, said shank 5 being forced down into the sleeve 4 integral with the rubber suction cup 3, the upper end of the sleeve 4 fitting into and contracting in the groove 6 to aid in holding the cup 3 and handle 1 in associated relation.

However, before the cup 3 and handle 1 are associated as above, the bell shaped guard 2 is.

dropped down over the upper end of the sleeve 4 with the recessed face of said bell 2 presented downward toward and concentric with relation to the upper face of cup 3, the helical spring 7 being then slipped over the sleeve e and resting on bell 2. The bell 2 is provided with a central perforation or circular hole 2a of suiilcient diameter to receive the sleeve 4, but of less diameter than a portion of the handle 1, and preferably of less diameter than a portion of the shank 5 of said handle 1, as illustrated in Figs. 3 and 4, whereby the guard 2 will be permanently associated with the other two elements of the tool against unintentional separation from the tool. Also the spring '7 will have its lower portion bearing against guard 2 of considerably greater diameter than the hole 2a and its upper portion of less diameter than the greatest diameter of shank 5, being of a gradually coned shape, and will be of such length as to be at all times under some compression tending to force the guard 2 toward the cup 3, as illustrated in Fig. 3, such compression being considerably increased when the cup 3 is forced against a valve C as illustrated in Fig. 4.

Thus normally all four elements of the tool will be permanently associated together and in use the guard 2 will be forced by the spring '7 down upon the upper face of the engine block A about the upper end of the valve C being operated upon, and will engage the abrupt radially outer face of said valve C to prevent creeping of the suction cup 3 on the upper or outer face of said valve C.

The internal diameter of the lower portion of the guard or bell 2 is to be such, as illustrated, as to just comfortably receive the valve head C, or the upper projecting part thereof with a slight allowance for play between the opposed faces of said valve head C and the said guard or bell 2.

In-the drawing all parts of the valve grinding tool, as well as the valve C and stem D, are made to actual full-size scale from actual commercial specimens of said tool and of said valve.

Having thus described our invention, what we claim is:

1. A valve grinding tool consisting of a rubber suction cup having an upwardly presented integral sleeve socket, a guard having an opening slightly larger than the external diameter of said sleeve socket and smaller than the lower part of the cup and adapted to be threaded over the upper end of said sleeve socket, in combination with an operating handle having a shank adapted to be inserted in said sleeve socket to permanently associate said handle and cup, said handle having a portion of greater cross sectional dimension than the diameter of the opening in said guard, and said guard having a portion adapted to extend below the lower edge of the cup in operation and to engage an opposed face of the valve being operated upon to prevent dis placement of the cup from the said valve.

2. A valve grinding tool consisting of a rubber suction cup having an upwardly presented integral sleeve socket, a guard having an opening slightly larger than the external diameter of said sleeve socket and smaller than the lower part of the cup and adapted to be threaded over the upper end of said sleeve socket, in combination with an operating handle having a shank adapted to be inserted in said sleeve socket to permanently associate said handle and cup, said shank having a portion of greater cross sectional dimension than the diameter of the opening in said guard, and said guard having a portion adapted to extend below the lower edge of the cup in operation and to engage an opposed face of the valve being operated upon to prevent displacement of the cup from the said valve.

3. A valve grinding tool consisting of a rubber suction cup having an upwardly presented integral sleeve socket, a guard having an opening slightly larger than the external diameter of said sleeve socket and smaller than the lower part of the cup and adapted to be threaded over the upper end of said sleeve socket, in combination with an operating handle having a shank adapted to be inserted in said sleeve socket to permanently associate said handle and cup, said handle having a portion of greater cross sectional dimension than the diameter of the open ing in said guard, and yielding means disposed about said sleeve and pressing said guard toward said suction cup, said guard having a portion adapted to extend below the lower edge of the cup in operation and to engage an opposed face of the valve being operated upon to prevent displacement of the cup from the said valve.

4. A valve grinding tool consisting of a rubber suction cup having an upwardly presented integral sleeve socket, a guard having an opening slightly larger than the external diameter of said sleeve socket and smaller than the lower part. of the cup and adapted to be threaded over the upper end of said sleeve socket, in combination with an operating handle having a shank adapted to be inserted in said sleeve socket to permanently associate said handle and cup, said shank having a portion of greater cross sectional dimension than the diameter of the opening in said guard, and a helical spring disposed about said sleeve and pressing said guard toward said suction cup, said spring having its lower end bearing against said guard of greater diameter than the opening in said guard and its upper end of less diameter than the upper end portion of said sleeve when expanded by said shank, and said guard having a portion adapted to extend below the lower edge of the cup in operation and to engage an opposed face of the valve being operated upon to prevent displacement of the cup'from the said valve.

HARRY W. KULP. MARTIN C. DELLINGER.

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