US4171729A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coolant circulating system for motorcycle
Assignee: Yamaha Motor Co Ltd
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Filing: 1977-05-26
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Granted: 1979-10-23
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Expires: 1997-05-26
Abstract
Abstract A coolant circulating system for a motorcycle having a liquid cooled engine. The system includes a radiator mounted to the front fork, an engine mounted to the frame, pipes from the engine, pipes from the radiator, and a fluid conducting, two-channel swivel connector on the steering shaft to enable the radiator and engine to be interconnected without requiring flexure of the pipes. Preferably the swivel connector is a body separate from and attachable to the steering shaft.
Inventors
- 👤 Hirotaka Shibata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:13
CPC Classifications
B; B62; B62K; B62K11/00; B60; B60K; B60K11/00; B60K11/02; B60K11/04
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
138 words
A cooling water circulating system for a motorcycle of the type which carries a water-cooled engine mounted on a motorcycle frame, a steering shaft rotatably mounted to said frame, and a front fork mounted to said steering shaft and rotatable around the axis of said steering shaft, said system comprising: a radiator mountable to said front fork; inlet and outlet coolant pipes from the engine and from the radiator; and a two-channel swivel connector means adapted to provide two-channel continuous coolant passages from the engine to the radiator and return at all rotary positions of the front fork relative to the frame, said connector means comprising a body separate from said steering shaft, frame and fork; and means for detachably attaching said swivel connector means to said steering shaft without disassembly of the steering shaft, frame, or fork.
Claim 2
Dependent Claim
138 words
A cooling water circulating system for a motorcycle of the type which carries a water-cooled engine mounted on a motorcycle frame, a steering shaft rotatably mounted to said frame, and a front fork mounted to said steering shaft and rotatable around the axis of said steering shaft, said system comprising: a radiator mountable to said front fork; inlet and outlet coolant pipes from the engine and from the radiator; and a two-channel swivel connector means adapted to provide two-channel continuous coolant passages from the engine to the radiator and return at all rotary positions of the front fork relative to the frame, said connector means comprising a body separate from said steering shaft, frame and fork; and means for detachably attaching said swivel connector means to said steering shaft without disassembly of the steering shaft, frame, or fork.
Claim 3
Dependent Claim
45 words
A system according to claim 1 in which the connector means includes a pair of separate chambers for flow therethrough between the two pipes of each pair of pipes, said chambers being disposed one above the other relative to the axis of the steering shaft.
Claim 4
Dependent Claim
46 words
A system according to claim 1 in which the connector means includes a pair of separate chambers for flow therethrough between the two pipes of each pair of pipes, said chambers being disposed laterally adjacent to one another relative to the axis of the steering shaft.
Claim 5
Dependent Claim
39 words
A system according to claim 1 in which said connector means includes an inner tube, and an outer tube, said tubes being concentrically rotatable relative to one another, each of said pipes providing means for communication with two tubes.
Claim 6
Dependent Claim
45 words
A system according to claim 4 in which the connector means includes a pair of separate chambers for flow therethrough between the two pipes of each pair of pipes, said chambers being disposed one above the other relative to the axis of the steering shaft.
Claim 7
Dependent Claim
46 words
A system according to claim 4 in which the connector means includes a pair of separate chambers for flow therethrough between the two pipes of each pair of pipes, said chambers being disposed laterally adjacent to one another relative to the axis of the steering shaft.
Claim 8
Dependent Claim
148 words
In combination: a motorcycle of the type which carries a water-cooled engine mounted on a motorcycle frame, a steering shaft rotatably mounted to said frame, and a front fork mounted to said steering shaft and rotatable around the axis of said steering shaft; and a cooling water circulating system for said engine comprising: a radiator mounted to said front fork; inlet and outlet coolant pipes from the engine and from the radiator; a two-channel swivel connector means detachably attached to said steering shaft and to said pipes, and constituting a body separate from said steering shaft, frame, and fork whereby to provide two-channel continuous coolant passage from the engine to the radiator and return at all rotary positions of the front fork relative to the frame; and means for detachably attaching said swivel connector means to said steering shaft without disassembly of the steering shaft, frame, or fork.
Claim 9
Dependent Claim
148 words
In combination: a motorcycle of the type which carries a water-cooled engine mounted on a motorcycle frame, a steering shaft rotatably mounted to said frame, and a front fork mounted to said steering shaft and rotatable around the axis of said steering shaft; and a cooling water circulating system for said engine comprising: a radiator mounted to said front fork; inlet and outlet coolant pipes from the engine and from the radiator; a two-channel swivel connector means detachably attached to said steering shaft and to said pipes, and constituting a body separate from said steering shaft, frame, and fork whereby to provide two-channel continuous coolant passage from the engine to the radiator and return at all rotary positions of the front fork relative to the frame; and means for detachably attaching said swivel connector means to said steering shaft without disassembly of the steering shaft, frame, or fork.
Claim 10
Dependent Claim
45 words
A combination according to claim 7 in which the connector means includes a pair of separate chambers for flow therethrough between the two pipes of each pair of pipes, said chambers being disposed one above the other relative to the axis of the steering shaft.
Claim 11
Dependent Claim
46 words
A combination according to claim 7 in which the connector means includes a pair of separate chambers for flow therethrough between the two pipes of each pair of pipes, said chambers being disposed laterally adjacent to one another realtive to the axis of the steering shaft.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-10-22 | 1983-04-23 | 1983-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-22 | 1987-04-23 | 1987-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-22 | 1991-04-23 | 1991-10-23 | $7700.00 | Window Closed / Lapsed |