Patent US3304077A successfully refreshed from Google Patents.
US3304077A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Suspension unit
Assignee: LeTourneau Westinghouse Co
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Filing: 1964-12-31
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Granted: 1967-02-14
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Expires: 1984-12-31
Abstract
No abstract record available.
Inventors
- 👤 Lyle E Eaton
- 👤 John M Dickerson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:16
CPC Classifications
F; F16; F16F; F16F9/00; F16F9/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
A SUSPENSION UNIT FOR A VEHICLE COMPRISING: A CYLINDER, A FIRST PISTON HAVING A ROD PORTION RECIPROCABLY RETAINED IN THE CYLINDER, THE FIRST PISTON AND THE ROD PORTION DEFINING WITH THE CYLINDER A HEAD CHAMBER AND A RODCHAMBER, ORFICE MEANS PROVIDING FLUID COMMUNICATION BETWEEN THE HEAD AND ROD CHAMBERS, A FLOATING PISTON RECIPROCABLY RETAINED IN ONE OF SAID FIRST PISTON AND SAID CYLINDER AND FORMING A THIRD CHAMBER THEREWITH, THE ROD CHAMBER BEING FILLED WITH A NON-COMPRESSIBLE FLUID, THE HEAD CHAMBER BEING FILLED WITH A NON-COMPRESSIBLE FLUID, A COMPRESSIBLE FLUID UNDER PRESSURE, A SOURCE OF VARIBLE FLUID PRESSURE, AND MEANS CONNECTING SAID SOURCE OF VARIABLE FLUID PRESSURE TO THE THIRD CHAMBER, WHEREBY THE LENGTH OF SAID UNIT CAN BE INCREASED AND DECREASED BY RESPECTIVELY INCREASING AND DECREASING THE VOLUME OF FLUID ADMITTED TO THE THIRD CHAMBER.
Claim 2
Dependent Claim
136 words
A SUSPENSION UNIT FOR A VEHICLE COMPRISING: A CYLINDER, A FIRST PISTON HAVING A ROD PORTION RECIPROCABLY RETAINED IN THE CYLINDER, THE FIRST PISTON AND THE ROD PORTION DEFINING WITH THE CYLINDER A HEAD CHAMBER AND A RODCHAMBER, ORFICE MEANS PROVIDING FLUID COMMUNICATION BETWEEN THE HEAD AND ROD CHAMBERS, A FLOATING PISTON RECIPROCABLY RETAINED IN ONE OF SAID FIRST PISTON AND SAID CYLINDER AND FORMING A THIRD CHAMBER THEREWITH, THE ROD CHAMBER BEING FILLED WITH A NON-COMPRESSIBLE FLUID, THE HEAD CHAMBER BEING FILLED WITH A NON-COMPRESSIBLE FLUID, A COMPRESSIBLE FLUID UNDER PRESSURE, A SOURCE OF VARIBLE FLUID PRESSURE, AND MEANS CONNECTING SAID SOURCE OF VARIABLE FLUID PRESSURE TO THE THIRD CHAMBER, WHEREBY THE LENGTH OF SAID UNIT CAN BE INCREASED AND DECREASED BY RESPECTIVELY INCREASING AND DECREASING THE VOLUME OF FLUID ADMITTED TO THE THIRD CHAMBER.
References Cited (Backward Citations)
US2769632A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-13 | 1970-08-15 | 1971-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-13 | 1974-08-15 | 1975-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-13 | 1978-08-15 | 1979-02-14 | $7700.00 | Window Closed / Lapsed |