US3222047A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealing arrangement for piston of suspension unit for motor vehicles
Assignee: ZF Boge GmbH
•
Filing: 1963-08-12
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Granted: 1965-12-07
•
Expires: 1983-08-12
Abstract
No abstract record available.
Inventors
- 👤 Tuczek Franz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:10
CPC Classifications
B; B60; B60G; B60G17/00; B60G17/02; B60G17/04; B60G17/0416; F; F16; F16F; F16F9/00; F16F9/32; F16F9/36; F16F9/368; B60G2202/00; B60G2202/10; B60G2202/15; B60G2202/154
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
A HYDROPNEUMATIC SUSPENSION DEVICE FOR MOTOR VEHICLES COMPRISING, IN COMBINATION: A CYLINDER HAVING PISTON MEANS RECIPROCABLE THEREIN DIVIDING SAID CYLINDER INTO A HIGH PRESSURE AND LOW PRESSURE FLUID CHAMBER, SAID PIS TON MEANS HAVING FIRST AND SECOND AXIALLY SPACED AND CIRCUMFERENTIALLY ARRANGED ANNULAR GROOVES AND A FLUID PASSAGEWAY PROVIDED THEREBETWEEN; A PISTON RING SEATED WITHIN RADIALLY OUTWARD PORTIONS OF SAID FIRST GROOVE ENGAGING THE WALL OF SAID CYLINDER FOR SEALINGLY SEPARATING SAID CHAMBERS; AND SAID CYLINDER HAVING A FLUID PRESSURE RELIEF PORT ASSOCIATED WITH FLUID PRESSURE CONTROL MEANS, SAID PORT BEING LOCATED FOR PERIODIC JUXTAPOSITION WITH SAID
Claim 2
Dependent Claim
97 words
A HYDROPNEUMATIC SUSPENSION DEVICE FOR MOTOR VEHICLES COMPRISING, IN COMBINATION: A CYLINDER HAVING PISTON MEANS RECIPROCABLE THEREIN DIVIDING SAID CYLINDER INTO A HIGH PRESSURE AND LOW PRESSURE FLUID CHAMBER, SAID PIS TON MEANS HAVING FIRST AND SECOND AXIALLY SPACED AND CIRCUMFERENTIALLY ARRANGED ANNULAR GROOVES AND A FLUID PASSAGEWAY PROVIDED THEREBETWEEN; A PISTON RING SEATED WITHIN RADIALLY OUTWARD PORTIONS OF SAID FIRST GROOVE ENGAGING THE WALL OF SAID CYLINDER FOR SEALINGLY SEPARATING SAID CHAMBERS; AND SAID CYLINDER HAVING A FLUID PRESSURE RELIEF PORT ASSOCIATED WITH FLUID PRESSURE CONTROL MEANS, SAID PORT BEING LOCATED FOR PERIODIC JUXTAPOSITION WITH SAID
References Cited (Backward Citations)
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Cited
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Cited
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Cited
GB511546A
Cited
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Cited
US2677933A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-06 | 1969-06-07 | 1969-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-06 | 1973-06-07 | 1973-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-06 | 1977-06-07 | 1977-12-07 | $7700.00 | Window Closed / Lapsed |