Patent US3224539A successfully refreshed from Google Patents.
US3224539A
Expired / Lapsed
US
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Double acting fluid operated clutch
Assignee: Daimler Benz AG
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Filing: 1962-11-30
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Granted: 1965-12-21
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Expires: 1982-11-30
Abstract
No abstract record available.
Inventors
- 👤 Werner R E Hensel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:08
CPC Classifications
F; F16; F16D; F16D25/00; F16D25/06; F16D21/00; F16D21/02; F16D21/06; F16H; F16H63/00; F16H63/02; F16H63/30; F16H63/3023; F16H63/3026
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
AN ACTUATING MECHANISM FOR A FRICTION CLUTCH, ESPECIALLY FOR A SHIFTING CLUTCH IN AUTOMATICALLY SHIFTED MOTOR VEHICLE TRANSMISSIONS, COMPRISING DRUM MEANS, DISK-LIKE MEANS CARRYING SAID DRUM MEANS, CLUTCH MEANS INCLUDING PARTS DISPOSED WITHIN SAID DRUM MEANS AND FURTHER INCLUDING A PRESSURE PLATE DISPOSED ON ONE SIDE OF THE DISKLIKE MEANS, ACTUATING PISTON MEANS DISPOSED ON THE OTHER SIDE OF SAID DISK-LIKE MEANS, AND CONNECTING MEANS INCLUDING A LONGITUDINALLY MOVABLE SLEEVE-LIKE MEMBER DISPOSED OUTWARDLY OF SAID DRUM MEANS FOR OPERATIVELY CONNECTING SAID ACTUATING PISTON MEANS WITH SAID PRESSURE PLATE, SAID ACTUATING PISTON MEANS BEING CONSTRUCTED AS DOUBLE-ACTING PISTON HAVING A RELATIVELY LARGE PISTON AREA EFFECTIVE FOR THE ENGAGEMENT OF THE CLUTCH MEANS AND A RELATIVELY SMALL PISTON AREA, THE LARGE PISTON AREA FACING SAID DISK-LIKE MEANS AND THE SMALL PISTON AREA BEING DISPOSED ON THE SIDE THEREOF OPPOSITE SAID DISK-LIKE MEANS.
Claim 2
Dependent Claim
140 words
AN ACTUATING MECHANISM FOR A FRICTION CLUTCH, ESPECIALLY FOR A SHIFTING CLUTCH IN AUTOMATICALLY SHIFTED MOTOR VEHICLE TRANSMISSIONS, COMPRISING DRUM MEANS, DISK-LIKE MEANS CARRYING SAID DRUM MEANS, CLUTCH MEANS INCLUDING PARTS DISPOSED WITHIN SAID DRUM MEANS AND FURTHER INCLUDING A PRESSURE PLATE DISPOSED ON ONE SIDE OF THE DISKLIKE MEANS, ACTUATING PISTON MEANS DISPOSED ON THE OTHER SIDE OF SAID DISK-LIKE MEANS, AND CONNECTING MEANS INCLUDING A LONGITUDINALLY MOVABLE SLEEVE-LIKE MEMBER DISPOSED OUTWARDLY OF SAID DRUM MEANS FOR OPERATIVELY CONNECTING SAID ACTUATING PISTON MEANS WITH SAID PRESSURE PLATE, SAID ACTUATING PISTON MEANS BEING CONSTRUCTED AS DOUBLE-ACTING PISTON HAVING A RELATIVELY LARGE PISTON AREA EFFECTIVE FOR THE ENGAGEMENT OF THE CLUTCH MEANS AND A RELATIVELY SMALL PISTON AREA, THE LARGE PISTON AREA FACING SAID DISK-LIKE MEANS AND THE SMALL PISTON AREA BEING DISPOSED ON THE SIDE THEREOF OPPOSITE SAID DISK-LIKE MEANS.
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) | 1968-12-20 | 1969-06-21 | 1969-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-20 | 1973-06-21 | 1973-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-20 | 1977-06-21 | 1977-12-21 | $7700.00 | Window Closed / Lapsed |