US1852794A - Valve lifting tool - Google Patents

Description

April 5, 1932. o. G. STAR K VALVE LIFTING TOOL Filed Feb. 9, 1928 Patented Apr. 5, 1932 UNITED STATES OTTMAR G. STARK, OF ST. LOUIS, MISSOURI VALVE LIF'IING r001.

Application filed February 9, 1928. Serial No. 252,949.

This invention relates to a new and useful improvement in valve lifting tools, one of the objects of the invention being to provide a tool which is simple in its construction and efficient in its use and can be quickly operated.

Another object of the invention is in providing the lifting tool with improved means for locking the jaws in expanded position.

A further object of the invention is in pro- .18 viding the lifting or separating means of the jaws of a construction so as to provide an automatic locking means.

Other and further objects will appear in the specification and be specifically pointed out in the appended claims, reference being had in the accompanying drawings, examplifying the invention, and in which Figure 1 is a side elevation of this improved valve lifting tool in extended position.

Figure 2 is a plan view of Fig. 1.

Figure 3 is a transverse vertical section taken approximately on the line III-III of Fig. 1.

WVith reference to the accompanying drawings, 1 designates the lower jaw member which is made of a single piece of strap metal which is bent at 2 intermediate of its ends so as to provide a pair of forwardly extending legs 3, each leg at its extending end being pair of jaws A.

Disposed upwardly of the jaw member 1 is a jaw member 5 which is made of a single piece of strap metal which is bended intermediate of its ends as designated at 6 so as to provide a pair of forwardly extending arms or legs 7 the free end of each arm being formed into a jaw 8.

The bended end 6 of the arms 7 is mounted between the legs 3 of the jaw member 1 and is pivoted between said legs by the pivot or rivet 9 and mounted on said pivot between the arms 7 of the jaw member 5 is a bell crank lever 10 having a hand engaging portion 11 formed at one end and a connecting portion 12 formed at its opposite end.

Supported transversely in the arms 7 of the jaw member 5 is a relatively long pin 18 and transversely mounted in the legs 8 of the jaw member 1 is a relatively long pin 11 and flattened as designated at 4 so as to provide a mounted on the pin 18 is a pair of depending spaced links 15 having a coil spring 16 locate there between and mounted on the pin 13, and mounted on the pin 14 and extending upwardly therefrom is a pair of spaced links 17 said links 15 and 17 being swingingly secured justing bolt 22.

In the operation of this improved valve lifting tool, the jaw members 1 and 5 are operated to contracted positions as shown'in Fig. 1 in which the jaws A and 8 will be adjacent one another so that they can be engaged against the lower end of the valve spring and the seat thereof and upon engaging and pressing down the end 11 of the bell crank lever 10, the jaws A and 8 will be moved to expanded positions thereby compressing the spring so that the valve can be removed and in which the spring can subsequently be displaced.

In operating the hand engaging portion 11 of the bell crank lever 10 downwardly for swinging the pairs of links 15 and 17 in their vertical positions, this movement of the bell crank lever and the links 15 and 17 expands 35 the jaw members 1 and 5 and the links 15 and 17 when moved to vertical positions will provide an automatic lock for holding the jaw members in the expanded positions. For moving the jaw members to contracted positions, the hand engaging portion 11 is elevated from its abutting position against the bended end 2 of the lower jaw member and swung to the approximate position shown in dotted lines at B in Fig. 1, this elevating movement of the bell crank lever 10 pushing the pivot 18 out of vertical alinement with the pins or pivots 13 or 14 of respective links 15 and 17 and consequently moving said links from locking position.

In order to accommodate the pair of jaws A and the pair of jaws 8 to valve springs of different widths, the adjusting bolts 21 and 22 are provided, and in which when respective nuts of said bolts are manipulated in a tightening or loosening direction, the jaws can be drawn together or imoved farther apart byreason-of the jaw members l and 5 being made of a resilient material.

From the disclosure of this improved valve lifting tool it is obviousfithatvasimp1e,1.eflicient and inexpensive tool is provided and which provides locking means which a're cooperable with the actuating lever and in which said locking means is automatic in'its operation.

What I claim-is:

1. A valve lifting tool comprising a pair of pivoted together jaw members,a lever mounted on the pivot of said jaw members, toggle links connecting said jaws members,

and a rod connecting said lever and the joinmg plvot of said llnks.

2. .A valvelifting tool comprising a'pair of pivoted together jaw members, a bell crank lever mounted'on the pivot of said jaw members, a .-pair of pivoted together links each being-connected to a respective jaw member, and a rod connected'to said lever and the connecting pivot of said links.

3. A valve lifting toolcomprising a pair of cooperable aw members, each of said jaw members being formed of a piece of-strap -metal which is bent on ltself lntermedi-ate of itsends forming paralleling legs, the bent portion of the upper jaw memberbeing inserted between thelegs of the lower jaw member, a pivot passing through the inserted portion of said upper jaw member and the legs of said lower jaw member for securing said members together, a bell crank lever mounted onsaid pivot between the legs of said upper jaw -member, a pair of connected together links'each being connected to a respective jaw member between then-legs thereof, and a rodconnected to said lever and the connectingpivot of'said links.

OTTMAR'G. STAR-K.

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