Patent US3380729A successfully refreshed from Google Patents.
US3380729A
Expired / Lapsed
US
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Hydropneumatic apparatus
Assignee: Fried Krupp AG Hoesch Krupp
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Filing: 1966-04-11
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Granted: 1968-04-30
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Expires: 1986-04-11
Abstract
No abstract record available.
Inventors
- 👤 Hoffmann Hans-Jurgen
- 👤 Lohr Manfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:45
CPC Classifications
F; F16; F16F; F16F9/00; F16F9/06; F16F9/08; F16F9/092; B; B60; B60G; B60G17/00; B60G17/02; B60G17/04; B60G17/044
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
A STRUCTURE OF THE CHARACTER DESCRIBED PARTICULARLY FOR USE AS A SHOCK ABSORBER IN AUTOMOTIVE VEHICLES, COMPRISING A CYLINDER AND A PLUNGER EACH CONNECTABLE TO ONE OF TWO MEMBERS WHICH ARE MOVABLE TOWARD AND AWAY FROM EACH OTHER, SAID CYLINDER HAVING A CYLINDER CHAMBER AND SAID PLUNGER BEING RECIPROCABLE IN SAID CHAMBER; A WORKING CHAMBER AND A STORAGE CHAMBER EACH CONTAINING A SUPPLY OF GASEOUS AND LIQUID FLUID; FIRST AND SECOND ONE-WAY VALVE MEANS RESPECTIVELY CONNECTING SAID CYLINDER CHAMBER WITH SAID WORKING CHAMBER AND SAID STORAGE CHAMBER TO RESPECTIVELY PERMIT FLOW OF LIQUID FLUID INTO SAID WORKING CHAMBER AND FROM SAID STORAGE CHAMBER, SAID CYLINDER HAVING FIRST AND SECOND OPENINGS RESPECTIVELY CONNECTING SAID CYLINDER CHAMBER WITH SAID WORKING
Claim 2
Dependent Claim
118 words
A STRUCTURE OF THE CHARACTER DESCRIBED PARTICULARLY FOR USE AS A SHOCK ABSORBER IN AUTOMOTIVE VEHICLES, COMPRISING A CYLINDER AND A PLUNGER EACH CONNECTABLE TO ONE OF TWO MEMBERS WHICH ARE MOVABLE TOWARD AND AWAY FROM EACH OTHER, SAID CYLINDER HAVING A CYLINDER CHAMBER AND SAID PLUNGER BEING RECIPROCABLE IN SAID CHAMBER; A WORKING CHAMBER AND A STORAGE CHAMBER EACH CONTAINING A SUPPLY OF GASEOUS AND LIQUID FLUID; FIRST AND SECOND ONE-WAY VALVE MEANS RESPECTIVELY CONNECTING SAID CYLINDER CHAMBER WITH SAID WORKING CHAMBER AND SAID STORAGE CHAMBER TO RESPECTIVELY PERMIT FLOW OF LIQUID FLUID INTO SAID WORKING CHAMBER AND FROM SAID STORAGE CHAMBER, SAID CYLINDER HAVING FIRST AND SECOND OPENINGS RESPECTIVELY CONNECTING SAID CYLINDER CHAMBER WITH SAID WORKING
References Cited (Backward Citations)
US3033556A
Cited
US3094317A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-30 | 1971-10-30 | 1972-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-30 | 1975-10-30 | 1976-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-30 | 1979-10-30 | 1980-04-30 | $7700.00 | Window Closed / Lapsed |