Patent US3128885A successfully refreshed from Google Patents.
US3128885A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Long travel hydraulic cushion device
Assignee: —
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Filing: —
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Granted: 1964-04-14
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Expires: 1981-04-14
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:50
CPC Classifications
F; F16; F16F; F16F9/00; F16F9/10; F16F9/14; F16F9/16; F16F9/18; F16F9/32; F16F9/48; F16F2226/00; F16F2230/00; F16F2230/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
155 words
A HYDRAULIC CUSHIONING DEVICE COMPRISING A HYDRAULIC FLUID CONTAINING CYLINDER INCLUDING AN OPEN-ENDED TUBE, A FIRST CYLINDER HEAD CLOSING ONE END OF SAID TUBE, A SECOND CYLINDER HEAD LOCATED BETWEEN THE OPEN AND CLOSED ENDS OF SAID TUBE AND INCLUDING A PERIPHERAL KEYWAY, A PLURALITY OF PERIPHERALLY SPACED OPENINGS EXTENDING THROUGH THE WALL OF SAID TUBE, KEY MEANS DISPOSED IN SAID KEYWAY AND ACCESSIBLE THROUGH SAID OPENINGS FOR POSITIONING SAID KEY MEANS TO FIX SAID SECOND CYLINDER HEAD AGAINST AXIAL MOVEMENT WITHIN SAID TUBE, FLUID DISPLACEMENT MEANS MOVABLE THROUGH SAID SECOND CYLINDER HEAD AND INCLUDING A PISTON HEAD LOCATED BETWEEN SAID CYLINDER HEADS AND DEFINING A HIGH-PRESSURE CHAMBER ADJACENT SAID SAID SECOND CYLINDER HEAD, A FLEXIBLE FLUID RECEPTACLE CONNECTED TO SAID FLUID DISPLACEMENT MEANS AND SAID SECOND CYLINDER HEAD ADJACENT THE OPEN END OF SAID TUBE AND IN CONSTANT COMMUNICATION WITH SAID LOW-PRESSURE CHAMBER, AND ORIFICE MEANS PROVIDING COMMUNICATION BETWEEN SAID HIGH AND LOW-PRESSURE CHAMBERS.
Claim 2
Dependent Claim
155 words
A HYDRAULIC CUSHIONING DEVICE COMPRISING A HYDRAULIC FLUID CONTAINING CYLINDER INCLUDING AN OPEN-ENDED TUBE, A FIRST CYLINDER HEAD CLOSING ONE END OF SAID TUBE, A SECOND CYLINDER HEAD LOCATED BETWEEN THE OPEN AND CLOSED ENDS OF SAID TUBE AND INCLUDING A PERIPHERAL KEYWAY, A PLURALITY OF PERIPHERALLY SPACED OPENINGS EXTENDING THROUGH THE WALL OF SAID TUBE, KEY MEANS DISPOSED IN SAID KEYWAY AND ACCESSIBLE THROUGH SAID OPENINGS FOR POSITIONING SAID KEY MEANS TO FIX SAID SECOND CYLINDER HEAD AGAINST AXIAL MOVEMENT WITHIN SAID TUBE, FLUID DISPLACEMENT MEANS MOVABLE THROUGH SAID SECOND CYLINDER HEAD AND INCLUDING A PISTON HEAD LOCATED BETWEEN SAID CYLINDER HEADS AND DEFINING A HIGH-PRESSURE CHAMBER ADJACENT SAID SAID SECOND CYLINDER HEAD, A FLEXIBLE FLUID RECEPTACLE CONNECTED TO SAID FLUID DISPLACEMENT MEANS AND SAID SECOND CYLINDER HEAD ADJACENT THE OPEN END OF SAID TUBE AND IN CONSTANT COMMUNICATION WITH SAID LOW-PRESSURE CHAMBER, AND ORIFICE MEANS PROVIDING COMMUNICATION BETWEEN SAID HIGH AND LOW-PRESSURE CHAMBERS.
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) | 1967-04-14 | 1967-10-14 | 1968-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-14 | 1971-10-14 | 1972-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-14 | 1975-10-14 | 1976-04-14 | $7700.00 | Window Closed / Lapsed |