US3148869A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic cushion device
Assignee: Pullman Inc
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Filing: 1963-01-29
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Granted: 1964-09-15
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Expires: 1983-01-29
Abstract
No abstract record available.
Inventors
- 👤 William H Peterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:04
CPC Classifications
B; B61; B61G; B61G9/00; B61G9/04; B61G9/08; Y; Y10; Y10T; Y10T137/00; Y10T137/598; Y10T137/6154; Y10T137/8593; Y10T137/87917; Y10T137/88054; Y10T137/88062
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
135 words
IN A HYDRAULIC CUSHION DEVICE WHEREIN FLUID FILLED CYLINDER AND PISTON MEANS TELESCOPICALLY COACT TO ABSORB FORCES APPLIED THERETO, AT LEAST ONE OF SAID CYLINDER AND PISTON MEANS BEING FORMED WITH A TUBULAR PORTION CLOSED OFF AT ONE END THEREOF BY A REMOVABLE END PLATE, THE PROVISION OF A FLUID CHARGING AND END PLATE ATTACHMENT UNIT FORMING A PART OF SAID ONE CYLINDER AND PISTON MEANS, SAID UNIT COMPRISING PLUG MEANS FIXED IN SAID TUBULAR PORTION, A FLUID DELIVERY PASSAGE EXTENDING THROUGH SAID PLUG MEANS, SAID PASSAGE INCLUDING A THREADED PORTION, CHECK VALVE MEANS IN AN INNERMOST PORTION OF SAID PASSAGE AND OPERATIVE TO PERMIT ONE-WAY FLOW OF FLUID DURING CHARGING OF SAID CUSHIONING DEVICE, AND END PLATE FASTENER MEANS EXTENDING THROUGH SAID END PLATE AND THREADEDLY RECEIVED IN SAID THREADED PORTION OF SAID PASSAGE.
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) | 1967-09-15 | 1968-03-16 | 1968-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-15 | 1972-03-16 | 1972-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-15 | 1976-03-16 | 1976-09-15 | $7700.00 | Window Closed / Lapsed |