Patent US2722198A successfully refreshed from Google Patents.
US3340976A
Expired / Lapsed
US
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Speed responsive coupling devices
Assignee: Mobil Oil AS
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Filing: 1965-12-06
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Granted: 1967-09-12
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Expires: 1985-12-06
Abstract
No abstract record available.
Inventors
- 👤 David B Cox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:15
CPC Classifications
F; F16; F16D; F16D43/00; F16D43/28; F16D43/284
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
IN A POWER TRANSMISSION DEVICE COMPRISING A DRIVING MEMBER, A DRIVER MEMBER AXIALLY MOVABLE TOWARD AND FROM THE DRIVING MEMBER, AND MEANS INTERMEDIATE SAID MEMBERS FOR PROVIDING A DRIVING CONNECTION THEREBETWEEN, THE IMPROVEMENT COMPRISING A ROTATABLE PLATE ADJACENT SAID DRIVING MEMBER, A NON-ROTATABLE PLATE SPACED FROM SAID ROTATABLE PLATE BY A NARROW GAP, SAID NONROTATABLE PLATE BEING AXIALLY MOVABLE TOWARD AND FROM THE ROTATABLE PLATE, A VISCOELASTIC LIQUID IN SAID GAP IN CONTACT WITH ADJACENT SURFACES OF SAID PLATES, SAID LIQUID BEING CHARACTERIZED, WHEN SUBJECTED TO A ROTARY STRESS, OF UNDERGOING ROTARY SHEAR AND EXERTING A PRESSURE NORMAL TO SAID SURFACE OF THE NON-ROTATABLE PLATE, MEANS FOR
Claim 2
Dependent Claim
107 words
IN A POWER TRANSMISSION DEVICE COMPRISING A DRIVING MEMBER, A DRIVER MEMBER AXIALLY MOVABLE TOWARD AND FROM THE DRIVING MEMBER, AND MEANS INTERMEDIATE SAID MEMBERS FOR PROVIDING A DRIVING CONNECTION THEREBETWEEN, THE IMPROVEMENT COMPRISING A ROTATABLE PLATE ADJACENT SAID DRIVING MEMBER, A NON-ROTATABLE PLATE SPACED FROM SAID ROTATABLE PLATE BY A NARROW GAP, SAID NONROTATABLE PLATE BEING AXIALLY MOVABLE TOWARD AND FROM THE ROTATABLE PLATE, A VISCOELASTIC LIQUID IN SAID GAP IN CONTACT WITH ADJACENT SURFACES OF SAID PLATES, SAID LIQUID BEING CHARACTERIZED, WHEN SUBJECTED TO A ROTARY STRESS, OF UNDERGOING ROTARY SHEAR AND EXERTING A PRESSURE NORMAL TO SAID SURFACE OF THE NON-ROTATABLE PLATE, MEANS FOR
References Cited (Backward Citations)
US1618644A
Cited
US3209874A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-11 | 1971-03-13 | 1971-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-11 | 1975-03-13 | 1975-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-11 | 1979-03-13 | 1979-09-12 | $7700.00 | Window Closed / Lapsed |