Patent US3240295A successfully refreshed from Google Patents.
US3240295A
Expired / Lapsed
US
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Motion damping device
Assignee: Union Oil Company of California
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Filing: 1962-11-28
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Granted: 1966-03-15
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Expires: 1982-11-28
Abstract
No abstract record available.
Inventors
- 👤 Thomas W Martinek
- 👤 Donald L Klass
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:18
CPC Classifications
F; F16; F16F; F16F9/00; F16F9/32; F16F9/53; F16F9/532
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
IN A MOTION DAMPING DEVICE COMPRISING A PAIR OF MEMBERS SUPPORTED IN RELATIVELY RECIPROCATING MOVABLE RELATION, A FIELD-RESPONSIVE FLUID IN CONTACT WITH SAID MEMBERS, AND AN ELECTRIC CIRCUIT FOR APPLYING AN ENERGIZING FIELD TO SAID FLUID WHEREBY THE IMPEDANCE TO RELATIVE MOVEMENT OF SAID MEMBERS IS CONTROLLED, THE IMPROVEMENT COMPRISING MEANS IN SAID CIRCUIT RESPONSIVE TO MOVEMENT OF EITHER OF SAID MEMBERS IN A DIRECTION AWAY FROM A PREDETERMINED POSITION FOR APPLYING A FIELD TO SAID FLUID AND FOR INTERRUPTING SAID FIELD WHEN MOVEMENT OF EITHER MEMBER IS TOWARD SAID PREDETERMINED POSITION.
Claim 2
Dependent Claim
92 words
IN A MOTION DAMPING DEVICE COMPRISING A PAIR OF MEMBERS SUPPORTED IN RELATIVELY RECIPROCATING MOVABLE RELATION, A FIELD-RESPONSIVE FLUID IN CONTACT WITH SAID MEMBERS, AND AN ELECTRIC CIRCUIT FOR APPLYING AN ENERGIZING FIELD TO SAID FLUID WHEREBY THE IMPEDANCE TO RELATIVE MOVEMENT OF SAID MEMBERS IS CONTROLLED, THE IMPROVEMENT COMPRISING MEANS IN SAID CIRCUIT RESPONSIVE TO MOVEMENT OF EITHER OF SAID MEMBERS IN A DIRECTION AWAY FROM A PREDETERMINED POSITION FOR APPLYING A FIELD TO SAID FLUID AND FOR INTERRUPTING SAID FIELD WHEN MOVEMENT OF EITHER MEMBER IS TOWARD SAID PREDETERMINED POSITION.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-14 | 1969-09-13 | 1970-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-14 | 1973-09-13 | 1974-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-14 | 1977-09-13 | 1978-03-15 | $7700.00 | Window Closed / Lapsed |