US3387840A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Suspension unit
Assignee: Dresser Industries Inc
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Filing: 1966-10-07
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Granted: 1968-06-11
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Expires: 1986-10-07
Abstract
No abstract record available.
Inventors
- 👤 William H Bechman
- 👤 Jack O Winsor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:32
CPC Classifications
F; F16; F16F; F16F9/00; F16F9/06; F16F9/063
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
161 words
A SUSPENSION UNIT FOR A VEHICLE COMPRISING: A CYLINDER ASSEMBLY; A PISTON ASSEMBLY HAVING A ROD PORTION RECIPROCALLY RETAINED WITHIN SAID CYLINDER ASSEMBLY AND DEFINING THEREWITH A HEAD CHAMBER AND A ROD CHAMBER; A FLOATING PISTON RECIPROCALLY RETAINED IN ONE OF SAID ASSEMBLIES AND DEFINING THEREWITH A THIRD CHAMBER; SEAL MEANS ON SAID FLOATING PISTON INTERPOSED BETWEEN SAID HEAD CHAMBER AND SAID THIRD CHAMBER AND PROVIDING A FLUID SEAL THEREBETWEEN; SAID ROD CHAMBER CONTAINING AN INCOMPRESSIBLE FLUID; SAID HEAD CHAMBER CONTAINING AN INCOMPRESSIBLE FLUID AND A COMPRESSIBLE FLUID UNDER PRESSURE, SAID INCOMPRESSIBLE FLUID CONTACTING SAID SEAL MEANS; CONDUIT MEANS FOR PERMITTING FLOW OF SAID COMPRESSIBLE FLUID BETWEEN SAID HEAD AND ROD CHAMBERS; SAID THIRD CHAMBER CONTAINING A VOLUME OF INCOMPRESSIBLE FLUID AND A VOLUME OF COMPRESSIBLE FLUID UNDER PRESSURE, SAID VOLUME OF INCOMPRESSIBLE FLUID CONTACTING SAID SEAL VOLUME OF CINCOMPRESSIBLE FLUID SAID INCOMPRESSIBLE FLUID IN SAID HEAD CHAMBER, A BARRIER OF INCOMPRESSIBLE FLUID ON BOTH OPERATIONAL SIDES OF SAID SEAL MEANS.
Claim 2
Dependent Claim
161 words
A SUSPENSION UNIT FOR A VEHICLE COMPRISING: A CYLINDER ASSEMBLY; A PISTON ASSEMBLY HAVING A ROD PORTION RECIPROCALLY RETAINED WITHIN SAID CYLINDER ASSEMBLY AND DEFINING THEREWITH A HEAD CHAMBER AND A ROD CHAMBER; A FLOATING PISTON RECIPROCALLY RETAINED IN ONE OF SAID ASSEMBLIES AND DEFINING THEREWITH A THIRD CHAMBER; SEAL MEANS ON SAID FLOATING PISTON INTERPOSED BETWEEN SAID HEAD CHAMBER AND SAID THIRD CHAMBER AND PROVIDING A FLUID SEAL THEREBETWEEN; SAID ROD CHAMBER CONTAINING AN INCOMPRESSIBLE FLUID; SAID HEAD CHAMBER CONTAINING AN INCOMPRESSIBLE FLUID AND A COMPRESSIBLE FLUID UNDER PRESSURE, SAID INCOMPRESSIBLE FLUID CONTACTING SAID SEAL MEANS; CONDUIT MEANS FOR PERMITTING FLOW OF SAID COMPRESSIBLE FLUID BETWEEN SAID HEAD AND ROD CHAMBERS; SAID THIRD CHAMBER CONTAINING A VOLUME OF INCOMPRESSIBLE FLUID AND A VOLUME OF COMPRESSIBLE FLUID UNDER PRESSURE, SAID VOLUME OF INCOMPRESSIBLE FLUID CONTACTING SAID SEAL VOLUME OF CINCOMPRESSIBLE FLUID SAID INCOMPRESSIBLE FLUID IN SAID HEAD CHAMBER, A BARRIER OF INCOMPRESSIBLE FLUID ON BOTH OPERATIONAL SIDES OF SAID SEAL MEANS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-06-11 | 1971-12-11 | 1972-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-11 | 1975-12-11 | 1976-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-11 | 1979-12-11 | 1980-06-11 | $7700.00 | Window Closed / Lapsed |