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Publication numberUS2434456 A
Publication typeGrant
Publication dateJan 13, 1948
Filing dateFeb 10, 1945
Priority dateMay 9, 1944
Publication numberUS 2434456 A, US 2434456A, US-A-2434456, US2434456 A, US2434456A
InventorsCook Nathan B
Original AssigneeCook Nathan B
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Poppet valve assembling tool
US 2434456 A
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Description  (OCR text may contain errors)

Jan. 13, 1948. N, B, COOK 2,434,456

. POPPET VALVE ASSEMBLING TOOL Original Filed May 9, 1944 FT .1. El /'0 v 444? 47 AZ /2 /8 /5 A9 24 M: f 4 k O" y g Q a 9 3 W 71%? W Patented Jan. 13, 1948 POPPET VALVE ASSEMBLING TOOL Nathan B. Cook, Syracuse, N. Y.

Original application May 9, 1944, Serial No.

534,753. Divided and this application February 10, 1945, Serial No. 577,215

1 Claim.

This invention has for its object a tool for assembling or reassembling the valves, springs and abutments in the heads of internal combustion engines, operable to depress the spring abutment against the spring and move valve looks or lock members into interlocking coaction with the valve stem. It is particularly adapted for overhead valves, such as the type used in the engines of Chevrolet cars, trucks, etc.

The invention is shown as embodied as a unit with the tool for disassembling or releasing the valves of the valve springs preliminary to removing the valves.

The invention consists in the novel features and in the combinations and constructions hereinafter set forth and claimed.

This application is a division of my application Serial No. 534,753, filed May 9, 1944, for Poppet valve tool.

In describing this invention, reference is had to the accompanying drawings in which like characters designate corresponding parts in all the views.

Figure 1 is a view showing the use of the assembling tool of the unit, the tool being shown in starting position.

Figure 2 is a View similar to Figure 1 showing the assembling tool of the unit at the time the parts are assembled.

The valve has the usual stem 2 mounted in any suitable manner in the head 3 of an automotive engine. 4 is a spring abutment on the stem and locked thereto by lock members 5; and 6 is a spring thrusting in one direction against the cylinder head 3 in any well known manner and against the spring abutment 4. The spring abutment of this type is formed with a conical recess about the stem in which the lock members 5 are located. These lock members are arcuate or semi-circular in cross-section with their outer surface conical to conform to the conical walls of the recess. They are formed on their inner sides with ribs 8 which interlock in a circumferential groove 9 in the upper end of the stem 2. This is the conventional construction and forms no part of the invention.

The invention resides in the tool for assembling the valve spring, spring abutment and locks or look members. The head [2 is used to reassemble the abutment, spring and lock members on the valve stem, after the valve is placed in the cylinder head. The head I2 is undivided and rigid on the end of a shank l0 and is formed with a socket or bore I! for receiving the end of the valve stem and with a counter bore l8 and with means operable to (1) depress the abutment against its spring and move the locking members into position wherein the ribs 8 are alined with the groove 9 in the valve stem, and (2) move the locking members radially and interlock the ribs 8 in the groove 9; this means being specifically the counter bore 18 having a conical or cam shaped bottom wall l9. The end of the head around the counter bore forms a bearing surface at 20 to be pressed against the abutment 4, as seen in Figure 1, after the lock members 5 have been located partly in the recess of the abutment but are out of or above interlocking engagement with the groove 9 in the valve stem. Now upon force being applied to the tool to depress the head [2, the abutment 4 is depressed, compressing the spring 6 and the conical bottom IB of the counter bore presses against the upper edges of the lock members 5 forcing them also axially along the valve stem until the lock members or the ribs 8 thereon become alined with the groove 9 of the stem, where further depression earns the lock members radially inward, causing the ribs 8 to interlock in the groove 9. The tool can then be removed. The end of the valve stem 2 enters an axial bore I! at the apex of the conical bore I8 when the head [2 is fully depressed.

What I claim is:

A poppet valve tool for spring pressed valves in which the spring thrusts against the spring abutment on the valve stem, and the abutment has a laterally extending annular flange at its outer end and is held in position on the valve stem by lock members fitting in a conical recess in the abutment and having internal ribs interlocking in a groove in the valve stem, said tool comprising a rigid single piece head having a socket extending inwardly from the outer end thereof for receiving the end of the valve stem, the head being provided at its outer end around the socket with a pressure face of flat annular form and of a size for pressing against the flange of the spring abutment to depress the same, said socket having a lower cylindrical end section of a length and interior diameter to freely accommodate therein upper portions of the locking members when partially positioned in the recess of the abutment and when the outer end of the head is in engagement with the flange of the spring abutment, said socket also having a conical section converging inwardly and extending directly from the upper end of the cylindrical wall of said lower section for engaging the upper outer edges of the lock members and moving the latter axially along the valve stem into alignment with the groove therein and also tilting the same inwardly about the ribs thereof into interlocking engagement with the groove in the valve stem during 5 the axial operating movement of the head while the abutment is being depressed by the end of the head; the socket also including a counter bore portion at the apex of the conical portion of the socket for receiving the extreme outer end 10 of the valve stem.

NATHAN B, COOKI REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1536601 *Aug 18, 1922May 5, 1925Anderson Nils AlfredTool for inserting split sleeves
US1779306 *Nov 26, 1929Oct 21, 1930Clark Ira JValve-stem lock-replacing tool
US1791961 *Jan 17, 1930Feb 10, 1931Frye Jason SValve lifter
US1851681 *Jun 2, 1928Mar 29, 1932Edward Gannon ThomasValve spring lock inserter
US1861973 *Apr 8, 1931Jun 7, 1932Frank HoblerValve tool
US2355579 *Jul 31, 1942Aug 8, 1944North American Aviation IncMethod of riveting
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2627653 *Jul 25, 1949Feb 10, 1953Robert H MaccreadyValve spring compressor
US2681622 *Apr 18, 1949Jun 22, 1954Wyott Mfg Co IncSpool valve pump
US2749602 *Jun 4, 1952Jun 12, 1956Sidney BakewellValve assembly machine
US3138855 *Sep 14, 1962Jun 30, 1964Marshall Calvert DTool for removing keys on poppet valves
US3314136 *Aug 5, 1964Apr 18, 1967Trw IncCollet lock removal tools
US3377691 *Oct 7, 1965Apr 16, 1968Inter Lakes Engineering CompanDevice for assembling valve parts
US3793999 *Jun 30, 1971Feb 26, 1974Trw IncValve spring cap-lock assembly and method and tool for assembly onto a valve stem
US3979811 *Oct 11, 1974Sep 14, 1976K-Line Industries, Inc.Overhead camshaft and valve train insertion and removal tools
US4095324 *May 28, 1976Jun 20, 1978William LawsonHandheld valve replacement tool
US4142282 *Jan 6, 1978Mar 6, 1979Caterpillar Tractor Co.Method for assembling a cartridge-type valve
US4667388 *Jul 8, 1985May 26, 1987Browning Ernest CInternal combustion engine valve assembly mounting tool
US5072950 *Aug 24, 1990Dec 17, 1991Seal Technology SystemsValve stem assembly
US5207196 *Jul 31, 1992May 4, 1993Trw Inc.Pre-assembled unit for engine valve system
US5761785 *Jun 30, 1995Jun 9, 1998Abb Flexible Automation, Inc.Vacuum tool for installing valve spring retainer and keys
US5996201 *Jan 30, 1998Dec 7, 1999Ringle; Gerald D.Valve assembly tool
Classifications
U.S. Classification29/215, 81/486, 29/249
International ClassificationB25B27/26, B25B27/14
Cooperative ClassificationB25B27/26
European ClassificationB25B27/26