US3776337A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dry-disc friction clutch
Assignee: Nissan Motor Co Ltd
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Filing: 1971-12-27
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Granted: 1973-12-04
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Expires: 1991-12-27
Abstract
Abstract In order to prevent retarded or incomplete disengagement of the clutch disc from the engine flywheel due to deteriorated sliding engagement between the transmission input shaft and the clutch hub splined thereto and due to the axial thrust imparted to the transmission input shaft as a result of the rotation of the lefthand helical main drive gear on the input shaft, the clutch is provided with pressure means which is adapted to urge the transmission input shaft away from the engine crankshaft thereby to overcome or cancel such axial thrust on the transmission input shaft.
Inventors
- 👤 K Yoshizawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:59
CPC Classifications
F; F16; F16D; F16D13/00; F16D13/22; F16D13/38; F16D13/46; F16D13/48; F16D13/50; F16D13/505
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
217 words
In combination; a rotary driven motive output shaft; a power transmission having a movable input shaft movable in directions toward and away from said output shaft; a friction clutch for coupling and uncoupling said input shaft to said output shaft; connecting means connecting said friction clutch to said input shaft for movement along said input shaft between a clutched position wherein said friction clutch couples said input shaft and said output shaft and a declutched position wherein it uncouples said input shaft and said output shaft and for effecting rotation of said input shaft when said friction clutch couples said input shaft and said output shaft; means in said transmission applying during operation of said transmission an axial thrust force to said input shaft in a direction toward said output shaft thereby effecting movement of said input shaft towards said output shaft; and movement of said friction clutch toward said clutch position; and biasing means biasing said input shaft in a direction away from said ouput shaft for effecting movement of said input shaft away from said output shaft and movement of said friction clutch toward said declutched position thereby preventing coupling of said input shaft and said output shaft by said axial thrust force when said friction clutch uncouples said input shaft and said output shaft.
Claim 2
Dependent Claim
217 words
In combination; a rotary driven motive output shaft; a power transmission having a movable input shaft movable in directions toward and away from said output shaft; a friction clutch for coupling and uncoupling said input shaft to said output shaft; connecting means connecting said friction clutch to said input shaft for movement along said input shaft between a clutched position wherein said friction clutch couples said input shaft and said output shaft and a declutched position wherein it uncouples said input shaft and said output shaft and for effecting rotation of said input shaft when said friction clutch couples said input shaft and said output shaft; means in said transmission applying during operation of said transmission an axial thrust force to said input shaft in a direction toward said output shaft thereby effecting movement of said input shaft towards said output shaft; and movement of said friction clutch toward said clutch position; and biasing means biasing said input shaft in a direction away from said ouput shaft for effecting movement of said input shaft away from said output shaft and movement of said friction clutch toward said declutched position thereby preventing coupling of said input shaft and said output shaft by said axial thrust force when said friction clutch uncouples said input shaft and said output shaft.
Claim 3
Dependent Claim
22 words
A combination according to claim 1: wherein said biasing meaNs comprises a spring disposed between said output shaft and said input shaft.
Claim 4
Dependent Claim
49 words
A combination according to claim 1: including means defining a blind bore in said output shaft housing therein a portion of said input shaft; and wherein said biasing means comprises a spring disposed within said blind bore between the blind end of said blind bore and said input shaft.
Claim 5
Dependent Claim
59 words
A combination according to claim 1: wherein said biasing means comprises a thrust bearing disposed around a portion of said input shaft, spring means biasing said thrust bearing away from said output shaft, and retaining means encasing said thrust bearing and said spring means and axially movably retaining said thrust bearing and said spring means on said input shaft.
Claim 6
Dependent Claim
14 words
A combination according to claim 4: wherein said spring means comprises coned disc springs.
Claim 7
Dependent Claim
17 words
A combination according to claim 4: including seating-spacing means for seating and spacing said coned disc springs.
Claim 8
Dependent Claim
14 words
A combination according to claim 6: wherein said spring means comprises a rubber ring.
Claim 9
Dependent Claim
15 words
A combination according to claim 4: wherein said spring means comprises a coned helical spring.
Claim 10
Dependent Claim
14 words
A combination according to claim 4: wherein said spring means comprises a coil spring.
Claim 11
Dependent Claim
21 words
A combination according to claim 4; wherein said spring means comprises means disposed between said thrust bearing and said output 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) | 1976-12-03 | 1977-06-04 | 1977-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-03 | 1981-06-04 | 1981-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-03 | 1985-06-04 | 1985-12-04 | $7700.00 | Window Closed / Lapsed |