US1494131A - Valve-cage extractor - Google Patents

Description

May 13 1924.

G. F. RENFTLE VALVE CAGE EXTRACTOR Filed May 10 1919 fiat] amva-wio'c 5;. FR an f6 Z c Patented May 13, 1924.

NITED STATES" GEORGE E. RENFTLE, OF CLEVELAND, OHIO, ASSIGNOR OF'ONE-HALF T JOHN A.

BURKE, OF" CLEVELAND, OHIO.

VALVE-GAGE Application filed May 10,

T0 osZZ whom it may concern:

Be it known that I, GEORGE F. RENFTLE, a citizen of the United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented certain new and useful Improvements in Valve-Gage Extractors, of which the following is a specification.

This invention relates to tools for removing valve cages from the cylinders of internal-combustion engines, and more particularly to a tool for pulling the valve cages from automobile engines after they have adhered to the walls of their openings and it is desired to regrind the valves or replace them, or make repairs.

The principal object of the invention is to provide a simple and powerful tool of said character, which is easily and quickly applied, and will withdraw a valve cage with little effort on the part of the operator.

With the above and other objects in view as will be readily understood, the invention will be hereinafter fully described as illustrated in the accompanying drawings, and the novel features thereof will be distinctly pointed out in the appended claims.

In the drawings like characters of reference are used to indicate corresponding parts.

Figure 1 is a front elevation of a tool constructed in accordance with my invention, applied for removing a valve cage,

Fig. 2 is a side view of the same,

Fig. 3 is a rear view of the tool,

Fig. 4 is a plan sectional view of the movable member taken on line H, and

Fig. 5 is a similar view, the movable member being omitted.

Referring to the drawings, 1 represents the cylinder of an automobile engine, 2 the opening therein for the valve cage 3, in which is slidably mounted the stem 4, of a valve 5, and 6 the coiled spring between the cupped washer 7 and the washer 8 secured by a pin 9 in the valve stem. The valve cage 3 is held in position by means of a sleeve nut threaded into the cylinder at 10. All of said parts are of the usual construction. It is often necessary to remove the valve cage 3 for the purpose of regrinding the valve seat thereof, or to permit the regrinding of the valve 5, or to replace the valve by a new one. After the engine has been in use for some time, the valve cages nx'rnnciro'a.

1919. Serial no. zeaoeo.

thereof become more or less stuck to the walls of their openings, which makes it dif ficult to remove them. 7

The tool now to be described was designed to make it' easy for extracting the valve cages. It consists of a frame 11 having an inturned head 12, and a pair of inturned feet 13 and 14 sufliciently spread apart to clear the valve cage and permit it to pass therebetween as it is withdrawn. The inturned head 12 of the frame is thickened at 15 and provided with a threaded opening 16 for receiving a screw 17 the lower end of which is reduced to form a neck 18. A member 19, of a somewhat similar form to said frame, is adapted to move therein between the head and the feet thereof. Said movable member has an inturned head 20, which is provided with an opening 21, slightly larger in diameter than the neck 18 of the screw 17, for receiving said neck and allowing free movement'thereon. Said neck is riveted down at 22, to form a head for retaining the movable member thereon and also to form a ball and socket joint for permitting free movement thereof. The lower end of the movable member 19 is also inturned to form a bifurcated foot 23 for straddling the valve stem a and engaging the coiled spring 6. Force is exerted upon the movable member 19 by the turning of the screw 17, by means of a suitable handle 24.

In extracting a valve cage, the movable member 19 is lowered to a suitable position in the frame 11, so that when the feet 13 and 14 thereof rest upon the engine, the bifurcated foot 23 of said movable member may engage the coiled spring 6. It is not necessary that the movable member 19 be lowered to an exact position, for the ball and socket joint at 22 will allow it to swing forwardly or laterally with relation to the frame 11, so that its bifurcated foot 23 may be easily applied to the coiled spring 6. After applying the tool, the turning of the screw 17 by means of the handle 24, will exert a great pulling force upon the valve cage and thus withdraw it from the engine.

Having fully described my invention, what I claim is:

1. A tool comprising a frame, a movable member, means supporting the movable member from the frame and adapted to actuate it, and the frame having inturned separated feet for bearing against a fixed the frame having inturned feet, a movable member, the movable member having an inturned head, the movable member having an inturned foot, the foot being bifurcated, a screw threaded in the head of the frame, the head of the movable member having an opening therethrough, the screw having a neck smaller than the opening in the movable member for passing therethrough, and said neck of the screw being headed in a rounding shape to form with said opening a ball and socket joint, substantially as described.

In testimony whereof I affix my signature.

GEORGE F. RENFTLE.

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