US3224540A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetically operated multiple disc clutch or brake
Assignee: ZF Friedrichshafen AG
•
Filing: 1962-02-26
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Granted: 1965-12-21
•
Expires: 1982-02-26
Abstract
No abstract record available.
Inventors
- 👤 Straub Hermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:10
CPC Classifications
F; F16; F16D; F16D27/00; F16D27/10; F16D27/108; F16D27/02; F16D27/04; F16D27/08; F16D7/00; F16D7/007; F16D2027/008
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
45 words
IN AN ELECTROMAGNETIC CLUTCH, THE COMBINATION OF A PLURALITY OF AXIALLY MOVABLE ROTATIVE FRICTIONAL ELEMENTS, ENERGIZABLE MAGNETIC MEANS ADJACENT SAID FRICTIONAL ELEMENTS, RESILIENT BIAS MEANS DISPOSED TO EFFECT ENGAGEMENT OF SAID PLURALITY OF FRICTIONAL ELEMENTS, SAID MAGNETIC MEANS COMPRISING A MAGNETIZABLE BODY CAPABLE OF RE-
Claim 2
Dependent Claim
45 words
IN AN ELECTROMAGNETIC CLUTCH, THE COMBINATION OF A PLURALITY OF AXIALLY MOVABLE ROTATIVE FRICTIONAL ELEMENTS, ENERGIZABLE MAGNETIC MEANS ADJACENT SAID FRICTIONAL ELEMENTS, RESILIENT BIAS MEANS DISPOSED TO EFFECT ENGAGEMENT OF SAID PLURALITY OF FRICTIONAL ELEMENTS, SAID MAGNETIC MEANS COMPRISING A MAGNETIZABLE BODY CAPABLE OF RE-
References Cited (Backward Citations)
US959569A
Cited
US1265911A
Cited
US1928301A
Cited
US2267114A
Cited
US2437871A
Cited
US2641344A
Cited
US2695687A
Cited
AT178107B
Cited
US2956658A
Cited
US3034365A
Cited
US3102931A
Cited
US3028737A
Cited
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 |