Patent US3691641A successfully refreshed from Google Patents.
US3691641A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tool for establishing ignition timing of a reciprocating internal combustion engine
Assignee: Ford Motor Co
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Filing: 1971-03-15
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Granted: 1972-09-19
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Expires: 1991-03-15
Abstract
Abstract An elongated bar that engages the engine crankshaft for rotation therewith has a pad for contacting a pan rail of the engine block when the number one piston of the engine is at its top dead center position. A pin slidable in the bar then is extended to position a timing plate on the engine block. Tightening the timing plate in this position establishes accurately the location of the plate relative to the number one piston.
Inventors
- 👤 John M Bell
- 👤 Robert A Mooney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:14
CPC Classifications
F; F02; F02P; F02P17/00; F02P17/02; F02P17/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
157 words
A tool for use in establishing ignition timing of a reciprocating internal combustion engine having an engine crankshaft mounted rotatably in an engine block and at least one piston connected to said crankshaft for reciprocating movement in said block comprising; a frame member, engaging means on said frame member for mounting said frame member on said engine crankshaft in a predetermined position, said frame member being rotatable relative to said block with said crankshaft when mounted on said crankshaft, abutment means on said frame member for contacting said engine block when said frame members and crankshaft rotation has moved said piston to a reference position, said engaging means comprises a cylindrical member fitting on an end of said engine crankshaft, a locking means for nonrotatably connecting said frame member to said crankshaft, and a pin means on said frame member for positioning a timing plate on said engine block when said piston is in said reference position.
Claim 2
Dependent Claim
157 words
A tool for use in establishing ignition timing of a reciprocating internal combustion engine having an engine crankshaft mounted rotatably in an engine block and at least one piston connected to said crankshaft for reciprocating movement in said block comprising; a frame member, engaging means on said frame member for mounting said frame member on said engine crankshaft in a predetermined position, said frame member being rotatable relative to said block with said crankshaft when mounted on said crankshaft, abutment means on said frame member for contacting said engine block when said frame members and crankshaft rotation has moved said piston to a reference position, said engaging means comprises a cylindrical member fitting on an end of said engine crankshaft, a locking means for nonrotatably connecting said frame member to said crankshaft, and a pin means on said frame member for positioning a timing plate on said engine block when said piston is in said reference position.
Claim 3
Dependent Claim
31 words
The tool of claim 1 in which the abutment means comprises a pad member for contacting a machined surface of said engine block when said piston is in said reference position.
Claim 4
Dependent Claim
26 words
The tool of claim 2 in which the pad member contacts a pan rail of the engine block when said piston is in said reference position.
Claim 5
Dependent Claim
38 words
The tool of claim 3 comprising spring means for spring loading said pin means toward and extended position where said pin means engages the timing plate and latch means for maintaining said pin means in a retracted position.
Claim 6
Dependent Claim
38 words
The tool of claim 1 comprising spring means for spring loading said pin means toward an extended position where said pin means engages the timing plate and latch means for maintaining said pin means in a retracted position.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-19 | 1976-03-20 | 1976-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-19 | 1980-03-20 | 1980-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-19 | 1984-03-20 | 1984-09-19 | $7700.00 | Window Closed / Lapsed |