Patent US3390742A successfully refreshed from Google Patents.
US3390742A
Expired / Lapsed
US
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Friction shock absorber
Assignee: United States Department of the Air Force
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Filing: 1966-12-13
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Granted: 1968-07-02
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Expires: 1986-12-13
Abstract
No abstract record available.
Inventors
- 👤 Louis C Hrusch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:29
CPC Classifications
B; B64; B64C; B64C25/00; B64C25/32; B64C25/58; B64C25/62; F; F16; F16F; F16F7/00; F16F7/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
A SHOCK ABSORBER WHICH UTILIZES FRICTION AS THE ENERGY DISSIPATOR COMPRISING: A PAIR OF MEMBERS LINEARLY AND RELATIVELY MOVEABLE, AN OVERHAULING SCREW MEANS CONNECTED TO ONE OF SAID MEMBERS, A ROTATING NUT IN ENGAGEMENT WITH SAID SCREW, SAID NUT BEING MOUNTD FOR ROTATION UPON LINEAR MOVEMENT OF SAID SCREW, A MULTIPLE DISC TYPE BRAKE UNIT HAVING STATIONARY AND ROTATING DISCS,
Claim 2
Dependent Claim
60 words
A SHOCK ABSORBER WHICH UTILIZES FRICTION AS THE ENERGY DISSIPATOR COMPRISING: A PAIR OF MEMBERS LINEARLY AND RELATIVELY MOVEABLE, AN OVERHAULING SCREW MEANS CONNECTED TO ONE OF SAID MEMBERS, A ROTATING NUT IN ENGAGEMENT WITH SAID SCREW, SAID NUT BEING MOUNTD FOR ROTATION UPON LINEAR MOVEMENT OF SAID SCREW, A MULTIPLE DISC TYPE BRAKE UNIT HAVING STATIONARY AND ROTATING DISCS,
References Cited (Backward Citations)
US2856179A
Cited
US3059727A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-02 | 1972-01-01 | 1972-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-02 | 1976-01-01 | 1976-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-02 | 1980-01-01 | 1980-07-02 | $7700.00 | Window Closed / Lapsed |