US3074708A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vehicle suspension
Assignee: Dowty Technical Developments Ltd
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Filing: 1960-10-31
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Granted: 1963-01-22
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Expires: 1980-10-31
Abstract
No abstract record available.
Inventors
- 👤 Gerald W M Lush
- 👤 Peter G C Whittall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:14
CPC Classifications
B; B60; B60G; B60G17/00; B60G17/02; B60G17/04; B60G17/044; Y; Y10; Y10S; Y10S267/00; Y10S267/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
146 words
A SUSPENSION UNIT INTENDED FOR DISPOSITION UPRIGHTLY IN USE, AND COMPRISING A LIQUID FILLED PRESSURE RESISTING CONTAINER, A PLUNGER DEVICE EXTENDING THROUGH THE CONTAINER, AN UPPER AND A LOWER HIGH PRESSURE SEAL, RESPECTIVELY, ENGAGING THE PLUNGER WHERE IT PROJECTS FROM THE CONTAINER, AND FORMING PART OF THE CONTAINER, THE PLUNGER DEVICE HAVING DIFFERING CROSS-SECTIONAL AREAS AT THE TWO SEALS SO THAT LONGITUDINAL MOVEMENT OF THE PLUNGER WITHIN THE CONTAINER VARIES THE EFFECTIVE VOLUME WITHIN THE CONTAINER, A LIQUID RESERVOIR EXTENDING FROM THE CONTAINER TO ENCLOSE THE LOWER END OF THE PLUNGER DEVICE EXTENDING FROM THE CONTAINER, PASSAGE MEANS FOR LEAKAGE FLOW FROM THE CONTAINER PAST AT LEAST THE LOWER ONE OF SAID SEALS TO THE RESERVOIR, AND A PUMP OPERATIVELY CONNECTED BETWEEN THE PLUNGER DEVICE AND THE CONTAINER TO PUMP LIQUID FROM THE RESERVOIR TO THE CONTAINER ON RECIPROCATION OF THE PLUNGER DEVICE WITHIN THE CONTAINER.
Claim 2
Dependent Claim
146 words
A SUSPENSION UNIT INTENDED FOR DISPOSITION UPRIGHTLY IN USE, AND COMPRISING A LIQUID FILLED PRESSURE RESISTING CONTAINER, A PLUNGER DEVICE EXTENDING THROUGH THE CONTAINER, AN UPPER AND A LOWER HIGH PRESSURE SEAL, RESPECTIVELY, ENGAGING THE PLUNGER WHERE IT PROJECTS FROM THE CONTAINER, AND FORMING PART OF THE CONTAINER, THE PLUNGER DEVICE HAVING DIFFERING CROSS-SECTIONAL AREAS AT THE TWO SEALS SO THAT LONGITUDINAL MOVEMENT OF THE PLUNGER WITHIN THE CONTAINER VARIES THE EFFECTIVE VOLUME WITHIN THE CONTAINER, A LIQUID RESERVOIR EXTENDING FROM THE CONTAINER TO ENCLOSE THE LOWER END OF THE PLUNGER DEVICE EXTENDING FROM THE CONTAINER, PASSAGE MEANS FOR LEAKAGE FLOW FROM THE CONTAINER PAST AT LEAST THE LOWER ONE OF SAID SEALS TO THE RESERVOIR, AND A PUMP OPERATIVELY CONNECTED BETWEEN THE PLUNGER DEVICE AND THE CONTAINER TO PUMP LIQUID FROM THE RESERVOIR TO THE CONTAINER ON RECIPROCATION OF THE PLUNGER DEVICE WITHIN THE CONTAINER.
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) | 1966-01-21 | 1966-07-23 | 1967-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-21 | 1970-07-23 | 1971-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-21 | 1974-07-23 | 1975-01-22 | $7700.00 | Window Closed / Lapsed |