Patent US3933230A successfully refreshed from Google Patents.
US3933230A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Clutch with disc release spring
Assignee: Exedy Corp
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Filing: 1974-06-03
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Granted: 1976-01-20
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Expires: 1994-06-03
Abstract
Abstract A device comprising a clutch disc having clutch facings between a flywheel and a pressure plate, a main drive shaft splined to a spline hub of the clutch disc for conjoint rotation therewith, a pilot bearing for supporting an end of the main drive shaft rotatably on the flywheel, a spring member interposed between the splined hub and a portion of the pilot bearing to be rotated conjointly with the main drive shaft for moving the clutch disc to a neutral position upon disengagement of the clutch, and means for determining the neutral position.
Inventors
- 👤 Kazuma Adachi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 10:00
CPC Classifications
F; F16; F16D; F16D13/00; F16D13/22; F16D13/38; F16D13/46; F16D13/48; F16D13/50; F16D13/505
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
201 words
A device for preventing improper disengagement of a clutch comprising a combination of: a clutch disc having clutch facings disposed between a flywheel and a pressure plate, a main drive shaft fitted in a spline hub of the clutch disc through spline engagement to support the clutch disc in an axially movable manner, a pilot bearing for rotatably supporting an end of the main drive shaft on the flywheel, and spring means interposed between the inner ring of the pilot bearing and the spline hub to accumulate therein a resilient force when the clutch is in an engaged state, the spring means including a combination of a plurality of dished springs housed and retained in a cylindrical holder, the cylindrical holder having one end slidably fitted around a cylindrical portion of the spline hub and the other end in abutting contact with the inner ring of the pilot bearing, the dished springs being arranged in alternate orientation, the spring means being operable to forcibly push the clutch disc to its neutral position upon a clutch disengaging operation, the pushing force of the spring means being so determined as to be reduced to zero when the clutch disc reaches the neutral position.
Claim 2
Independent Claim
201 words
A device for preventing improper disengagement of a clutch comprising a combination of: a clutch disc having clutch facings disposed between a flywheel and a pressure plate, a main drive shaft fitted in a spline hub of the clutch disc through spline engagement to support the clutch disc in an axially movable manner, a pilot bearing for rotatably supporting an end of the main drive shaft on the flywheel, and spring means interposed between the inner ring of the pilot bearing and the spline hub to accumulate therein a resilient force when the clutch is in an engaged state, the spring means including a combination of a plurality of dished springs housed and retained in a cylindrical holder, the cylindrical holder having one end slidably fitted around a cylindrical portion of the spline hub and the other end in abutting contact with the inner ring of the pilot bearing, the dished springs being arranged in alternate orientation, the spring means being operable to forcibly push the clutch disc to its neutral position upon a clutch disengaging operation, the pushing force of the spring means being so determined as to be reduced to zero when the clutch disc reaches the neutral position.
Claim 3
Dependent Claim
28 words
The device as set forth in claim 1 wherein the spring means is provided with a plurality of removable shims between one end thereof and the seat thereof.
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) | 1979-01-19 | 1979-07-21 | 1980-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-19 | 1983-07-21 | 1984-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-19 | 1987-07-21 | 1988-01-20 | $7700.00 | Window Closed / Lapsed |