US2046203A - Spring-compressing tool - Google Patents

Description

jme 3fm, w36. W A, MQNFORT 2,046,203

SPRING COMPRESSING TOOL Filed June 29, 1934 Patented June 30, 1936 UNITED STATES PATENT OFFICE 2 Claims.

This invention is a tool to facilitate the removal of keepers and washers from the valves of internal combustion engines. A particular object of the invention is to provide a simple tool by the use of which the Valve springs may be compressed to relieve the tension upon the washer or keeper of the Valve and thereby expedite its removal and also to provide a tool by which the spring may be gripped and held to be removed from the valve. These stated objects and other objects which will incidentally appear in the course of the following description are attained in such a tool as is illustrated in the accompanying drawing and the invention resides in certain novel features which will be particularly defined in the appended claims.

In the drawing:

Figures 1 and 2 are sectional elevations showing the manner of using the tool.

Figure 3 is an enlarged plan view of the springengaging end of the tool.

Figure 4 is a section on the line 4-4 of Figure 3.

In the drawing, the reference numeral I designates a valve and 2 designates a portion of the engine block, while 3 designates the Valve stem and 4 the tappet which operates the valve stem in the usual manner. The engine block is provided with a recess 5 which houses the spring 6, said spring resting upon a washer or keeper, indicated at 1.

In carrying out the present invention, there is provided a tool consisting of two bars or members 8 and 9 which are pivoted together near one end, the longer arms of the bars constituting handle members, while the opposite ends thereof constitute spring-engaging jaws. The pivotal connection between the members comprises a shank having a non-circular intermediate portion I@ which ts closely within an opening of the same contour as the said portion of the shank in the lower tool member 9, as clearly shown in Figure 4. The upper end portion of this shank is circular in cross section, as shown at I I, and nts through a circular opening in the upper member 8 so that said member may be turned about the shank and assume Various positions relative to the lower member 9. A washer I2 is tted around the upper end I I of the shank and the upper extremity of the shank is upset over the washer, as shown at I3, whereby the parts will be held together. The somewhat enlarged lower end of the shank is bifurcated, as shown at I4, and within this forked or bifurcated lower end is pivotally secured a depending fulcrum member I5.

(Cl. ,Z9-86.3)

The jaw ends of the tool members are arcuate in form, as clearly shown in Figure 3, and are adapted to t closely about the spring 6 and thereby enable the user to grip the spring and hold the saine as desired. One of the arcuate jaws I6 is provided at its lower edge, on its inner side and at its free end, with an inwardly extending lip or lug Il, while the opposite jaw I8 is provided with a somewhat more extended lip or flange I9 on its inner side and at the end of the handle member 9.

The recess 5, in the engine block, has an upstanding flange 20 upon its lower wall and has an opening or entrance 2I in its side through which a tool may be inserted to engage the spring. In

the use of the present tool, the handle members 15 are spread apart sufficiently to open the jaws I6 and I8 and permit them to clear and pass around the spring 5, as will be understood. As the jaws are closed upon the spring, as shown in Figure l, the lips or lugs I'i and I9 which are in vertically spaced planes, as shown in Figure 4, will enter between the lowest coils of the spring and will, consequently, bear against the spring so as to support the same, as will be understood upon reference to the dotted lines in Figures 3 and 4. With the tool in position, as shown in full lines in Figure 1, the free handle members are raised to the position indicated in dotted lines, while maintaining the grip upon the spring, so that the spring will be slightly compressed and the fulcrum member or foot I5 will be raised to a position in which its lower end may rest upon the lower flange 20 of the chamber or recess 5 in the engine block. Without releasing the grip upon the handle members, said members are then swung downwardly to the position shown in Figure 2, thereby lifting the spring and compressing the same so that the keeper or washer may be easily withdrawn. If the spring be then released, it will expand and extend between the upper and lower walls of the recess 5 but will be retained in said recess by the valve stem. If it be desired to remove the spring, the valve may be lifted sufciently to permit the spring to clear the valve stem and the spring may then be easily withdrawn. In returning the spring to working position, the valve may be lifted slightly and it will remain in the raised position until the parts have been assembled. The spring will then be gripped by and between the jaws I6 and I8 and may be inserted into position about the lower end of the valve stem, a slight pressure by the thumb of the operator being sulicient to bend the spring enough to pass under the end of the stem. While the spring is compressed, the washer or keeper may be inserted and then, if the grip upon the spring be released, the expansion of the spring will hold the parts in assembled relation.V

The opposed curved jaws, with their respective supporting lips or lugs, enable the user of the tool to obtain a firm grip upon the spring so that the spring may be easily compressed and if it be withdrawn, it will not be lost. The tool is very simple in construction and may be produced at little expense while it is highly efficient in use for the purposes for which it is designed.

Having thus described the invention; I claim:

1. A valve tool comprisinghandle members pivotally connected near one end, arcuate shaped jaws at said ends of the handle members adapted to'encircle and grip a coil spring and each extending longitudinally of the handle member at the opposite side of the tool from the other jaw, an

inwardly projecting lip projecting rearwardlyV other end of the shank.

from the lower edge of one jaw at the free outer end of the same, and a cooperating lip projecting forwardly` from the lower edge of the opposed jaw Y tion iitting an opening of like contour in one of the members and having a circular end portion extending through the other member, means co- Vacting with the said circular end portion of the shank to retain the shank in the members, and a fulcrum member pivotally connected with the WILLIAM A. 'MONFORT

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