US1234967A

US1234967A - Valve-removing tool.

Info

Publication number: US1234967A
Application number: US14510217A
Authority: US
Inventors: Clarence Otto Throp
Original assignee: Individual
Current assignee: Individual
Priority date: 1917-01-29
Filing date: 1917-01-29
Publication date: 1917-07-31
Anticipated expiration: 1934-07-31

Description

C. O. THROP.

VALVE REMOVING TOOL.

APPLICATION FILED-JAN.29.1917.

1 234 9 7 Patented July 31, 191?;

. lllll HIH Av VE/V 7'05; Ci 0. THE 0P orrro.

CLARENCE OTTO THROP, OF JEFFERSON, IOWA.

VALVE-REMOVING TOOL.

Specificationof Letters Patent.

Patented July 31, 1917.

Application filed January 29, 1917. Serial No. 145,102.

To all whom it may concern:

Be it known that I, CLARENCE O'r'ro THROP, citizen of the United States of America, and resident of Jefferson, Greene county, Iowa, have invented a new and useful Valve- Removing Tool, of which the following is a specification.

The object of this invention is to provide improved means of simple, durable and inexpensive construction, and adapted for manual actuation for preliminary use in removing valves from internal combustion engines.

A further object of this invention is to provide a hand tool of novel construction adapted to be used in assembling or disassembling valve devices of an internal combustion engine, said tool being so constructed and the parts thereof so arranged that one member of the tool has a fixed relation to the engine while another member is movable relative to the fixed member for the purpose of compressing a valve spring or raising said spring in such manner as to permit manual access to and operation of parts of a valve contained in said engine.

A further object of this invention is to provide a hand tool with a stationary member, a movable member on and in opposition to the stationary member, and. a lever on the movable member, acting on the stationary member and reacting on and moving the movable member.

My invention consists in the construction, arrangement and combination of elements hereinafter set forth, pointed out in my claims and illustrated by the accompanying drawing, in which Figure 1 is a plan of my improved valveremoving tool. Fig. 2 is an elevation, partly in section and on a reduced scale, showing my improved tool in position-for practical use.

It is well known to be difiicult to remove valves of an internal combustion engine especially after said engine has been assembled and used and it is desired to remove the valves for regrinding, or for grinding of their seats. In ordinary construction a valve employed to control the ingress of explosive fluid to the engine is formed with a stem adapted to be engaged and placed in open position by a tappet or supplemental stem operated by a cam. Ordinarily the valve stem is formed with a loose collar held thereon in one direction by a key or pin extending through the stem and a spring is mounted between and expansively impinges said collar and a guide through which the valve stem may reciprocate. The spring is under tension at all times, and, in order to remove the key or pin and permit the Withdrawal of the valve stem through the spring and away from its seat, said spring must be contracted away from and relieved from pressure upon the key or pin. In engines of difi erent construction the valves are diflerently arranged with relation to the cylinders and the same tool, in-respect of dimensions and arrangement of parts, may not ordinarily serve for compressing springs so differently arranged and located. The tool herein shown and described is particularly adapted for use with a variety of types of engines. a

In the construction and application of the device as shown the numeral 10 designates generally those parts of an engine to which the tool is applied, in the construction of which a valve stem 11 is mounted for reciprocation through a guide or bearing member 12. On the stem 11 are mounted an expansive coil spring 13 and collar 14:. One end portion of the spring 13 normally impinges the guide 12 and the opposite end portion of said spring normally impinges the collar 11 and tends to move said collar away from said guide. Movement of the collar away from the guide 12 is limited and determined by a. key or pin 15 removably and replaceably mounted through the extremity of the valve stem 11. I have shown also a tappet 11 opposed to the extremity of the valve stem 11 and adapted when operated in a common manner, the devices for the operation of which 'are not shown, to engage said valve stem and remove the valve from its seat in opposition to and by compression of the spring 13. p

The tool itself has a fixed or stationary member 16 which is'formed on a mild compound curve longitudinally, is concavo-convex in cross-section throughout a major portion of its length, and terminates at one end in a fork 18 expanded laterally and relatively thin. The fixed member 16 is formed with ears 16 and said ears are formed with registering pivot holes. A movable member 17 is formed with a rightangled extension 17 at one end,which rightangled extension is bifurcated, extends between the ears l6, and is formed with transverse holes registering with the holes in said ears and adapted to receive a pivot or bolt 20 whereby the movable member is pivoted to the fixed member. The body portion of the movable member 17 extends substantially parallel with the forked portion of the fixed member 16 and terminates in a fork 19 in opposition to and registration with the fork 18. The movable member 17 also is formed concavo-convex in cross-section throughout a major portion of its length and has its concaved face placed in opposition to the concaved face of the fixed member 16. A lever 21 is mounted through the fork of the right-angled ex tension 17 and is formed with a bent-up end portion 21 which extends through a slot 22 in the movable member 17. The extension 21 is formed with a series of transverse holes 23 registering selectively with transverse holes in the movable member 17 and said holes'are adapted to receive a pivot 25 which serves as a connection for the lever. The handle portion of the lever 21 is concave-convex in cross-section and is arranged with its concaved face in opposition to the concaved face of a handle portion of the fixed member 16. The movable member 17 also is provided with a slot 22 forming an extension of the furcate of the extension 1?" to permit the lever to oscillate from horizontal to vertical position and vice versa. The lever 21 is formed with a cam face 24, indicated partially by dotted lines in Fig. 2, adapted to engage the fixed member 16 within the concavity between the ears 16 and the fork 18, and said cam face serves as a fulcrum for said lever, and also serves as a lock to hold the lever in closed position on said fixed member.

In the practical use of the tool the pivot 25 is selectively mounted in a hole 23, the lever 21 is turned into substantially vertical position, the

forks

18 and 19 are introduced between the collar 14 and tappet 11*, the fork 18 resting on the tappet and the fork 19 engaging the collar. Then the lever 21 is moved through an are manually into the position shown in Fig. 2. During such movement the cam face 24 engages the fixed member 16 and causes the lever to react through the pivot 25 and move the movable member 17 through an arc to the position shown. member 17 efiects a separation of the fork 19 from the fork 18, thus compressing the spring 13 and raising the collar 14 from the key 15, after which the key may be removed conveniently, the tool being re moved by contracting it, and the valve and valve stem be lifted out through the spring.

It will be noted that when the lever 21 has been moved to the position shown in Fig. 2, the cam face 24 thereof is located beneath the pivot 25 and between the bolt Such movement of the movable- 20 and pivot 25, and the parts are locked, because of such arrangement in such position and need not be held manually by the operator.

1 claim as my invention 1. A valve-removing tool, comprising a fixed member formed with ears, a movable member pivoted to and between said ears and formed with a longitudinal slot, a hand lever pivoted to the movable member, extending through and adapted to traverse said slot and having an offset integral part adapted to engage the fixed member between the pivots of the movable member and hand lever respectively and move said movable member relative to said fixed member, and opposed engaging forks on said fixed and movable members adapted to engage respectively a fixed object and a spring-pressed object.

2. A valve-removing tool, comprising a fixed member formed with means for engaging a fixed object, a movable member pivoted to the fixed member and formed with means for engaging a spring-pressed object and also formed with a longitudinal slot, and a hand lever pivoted on said movable member, extending through and adapt ed to traverse said slot and formed with a cam face for engaging said fixed member between the pivots of the movable member and hand lever respectively and moving said movable member away from and looking it relative to said fixed member.

3. A valve-removing tool, comprising a fixed member formed with means for engaging a fixed object, a movable member pivoted to the fixed member and formed with means for engaging a spring-pressed object, and a hand lever adjustably pivoted on said movable member and formed with a cam face for variably engaging said fixed member between the pivots of the movable member and hand lever respectively and moving said movable member away from and locking it relative to said fixed member.

4. A valve-removing tool, comprising a fixed member formed with means for engaging a fixed object, a movable member pivoted to the fixed member and formed with means for engaging a spring-pressed object, and a hand lever pivoted on said movable member and formed with a cam face for engaging said fixed member and moving said movable-.me'mber away from said fixed memher, said cam face also serving to hold the handle and fixed members in closed positions and stationary relative to each other, whereby said movable member is held in separated relation to said fixed member.

5. A valve-removing tool, comprising a fixed member formed with means for engaging a fixed object, a movable member formed with a right-angled extension at one end and pivoted to the central portion of said fixed member and formed at its oppoengage said fixed member between the pivots site end with means for engaging a springof the movablemember and hand lever repressed object, a lever formed at one end spectively. 0 with a. bent-up extension pivoted to and in- Signed by me at J elferson, Iowa, this 23d 5 termediate the ends of said movable member, day of January, 1917.

said lever being formed with a cam face at the base of the bent-up extension adapted to I CLARENCE OTTO THROP.