Patent US3349880A successfully refreshed from Google Patents.
US3349880A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic spring clutch assembly
Assignee: Precision Specialties Inc
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Filing: 1966-06-15
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Granted: 1967-10-31
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Expires: 1986-06-15
Abstract
No abstract record available.
Inventors
- 👤 Baer John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:22
CPC Classifications
F; F16; F16D; F16D27/00; F16D27/10; F16D27/105
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
159 words
A CLUTCH ASSEMBLY COMPRISING: A FRAME; A DRIVING MEMBER ROTATABLY SUPPORTED ALONG AN AXIS THROUGH SAID FRAME; A DRIVEN MEMBER ROTATABLY SUPPORTED ALONG ESSENTIALLY THE SAME AXIS OF ROTATION AS THE DRIVING MEMBER; A HELICAL CLUTCH SPRING FIXED AT ONE END TO SAID DRIVEN MEMBER AND TIGHTLY ENCIRCLING SAID DRIVING MEMBER; A COLLAR MEANS ENGAGING THE FREE END OF SAID CLUTCH SPRING AND ROTATABLE THEREWITH WHEN SAID SPRING IS DRIVEN BY SAID DRIVING MEMBER; AS BRAKE MEANS ASSOCIATED WITH SAID FRAME FOR STOPPING ROTATION OF SAID COLLAR MEANS TO LOOSEN SAID SPRING FROM SAID DRIVING MEMBER; MEANS FOR ACTUATING SAID BRAKE MEANS BETWEEN A CONDITION TO STOP SAID COLLAR MEANS AND A CONDITION FREE OF ENGAGEMENT WITH SAID COLLAR MEANS; AND CLUTCH MEANS FOR PROVIDING A COUPLING BETWEEN SAID DRIVING MEMBER AND SAID DRIVEN MEMBER FOR PREVENTING OVER-RUNNING OF SAID DRIVEN MEMBER RELATIVE TO SAID DRIVING MEMBER BUT PERMITTING ROTATION OF SAID DRIVING MEMBER RELATIVE TO SAID DRIVEN MEMBER.
Claim 2
Dependent Claim
159 words
A CLUTCH ASSEMBLY COMPRISING: A FRAME; A DRIVING MEMBER ROTATABLY SUPPORTED ALONG AN AXIS THROUGH SAID FRAME; A DRIVEN MEMBER ROTATABLY SUPPORTED ALONG ESSENTIALLY THE SAME AXIS OF ROTATION AS THE DRIVING MEMBER; A HELICAL CLUTCH SPRING FIXED AT ONE END TO SAID DRIVEN MEMBER AND TIGHTLY ENCIRCLING SAID DRIVING MEMBER; A COLLAR MEANS ENGAGING THE FREE END OF SAID CLUTCH SPRING AND ROTATABLE THEREWITH WHEN SAID SPRING IS DRIVEN BY SAID DRIVING MEMBER; AS BRAKE MEANS ASSOCIATED WITH SAID FRAME FOR STOPPING ROTATION OF SAID COLLAR MEANS TO LOOSEN SAID SPRING FROM SAID DRIVING MEMBER; MEANS FOR ACTUATING SAID BRAKE MEANS BETWEEN A CONDITION TO STOP SAID COLLAR MEANS AND A CONDITION FREE OF ENGAGEMENT WITH SAID COLLAR MEANS; AND CLUTCH MEANS FOR PROVIDING A COUPLING BETWEEN SAID DRIVING MEMBER AND SAID DRIVEN MEMBER FOR PREVENTING OVER-RUNNING OF SAID DRIVEN MEMBER RELATIVE TO SAID DRIVING MEMBER BUT PERMITTING ROTATION OF SAID DRIVING MEMBER RELATIVE TO SAID DRIVEN MEMBER.
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) | 1970-10-30 | 1971-05-01 | 1971-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-30 | 1975-05-01 | 1975-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-30 | 1979-05-01 | 1979-10-31 | $7700.00 | Window Closed / Lapsed |