Patent US3365188A successfully refreshed from Google Patents.
US3365188A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Buffer with hydrodynamic piston centering bearing
Assignee: Houdaille Industries Inc
•
Filing: 1965-10-21
•
Granted: 1968-01-23
•
Expires: 1985-10-21
Abstract
No abstract record available.
Inventors
- 👤 Rumsey Rollin Douglas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:36
CPC Classifications
F; F16; F16F; F16F9/00; F16F9/32; F16F9/48; F16F9/486
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
A HYDRAULIC BUFFER INCLUDING A HOUSING AFFORDING ONE END OF THE BUFFER AND HAVING THEREIN A WORKING CHAMBER DEFINING A CYLINDRICAL WALL SLIDABLY OPPOSED BY A CYLINDRICAL PERIMETER OF A PISTON RECIPROCABLY OPERATIVE IN THE CHAMBER AND PROVIDED WITH A ROD EXTENDING FROM THE HOUSING TO AFFORD THE OPPOSITE END OF THE BUFFER; RELATIVE MOVEMENT OF THE HOUSING AND THE PISTON IN ONE AXIAL DIRECTION PLACING HYDRAULIC LIQUID IN SAID WORKING CHAMBER ON ONE END OF THE PISTON UNDER SUBSTANTIAL PRESSURE, HYDRODYNAMIC PISTON CENTERING BEARING MEANS INCLUDING CIRCUMFERENTIALLY SPACED POCKETS IN SAID PERIMETER SPACED FROM SAID PRESSURE END OF THE PISTON AND WITH A CONTINUOUS INTERVENING CYLINDRICAL PORTION OF SAID PERIMETER BETWEEN SAID POCKETS AND SAID END, AND MEANS DEFINING COMMUNICATION PASSAGES THROUGH SAID PISTON BETWEEN SAID PRESSURE END AND SAID POCKETS AND BYPASSING SAID INTERVENING PERIMETER PORTION.
Claim 2
Dependent Claim
138 words
A HYDRAULIC BUFFER INCLUDING A HOUSING AFFORDING ONE END OF THE BUFFER AND HAVING THEREIN A WORKING CHAMBER DEFINING A CYLINDRICAL WALL SLIDABLY OPPOSED BY A CYLINDRICAL PERIMETER OF A PISTON RECIPROCABLY OPERATIVE IN THE CHAMBER AND PROVIDED WITH A ROD EXTENDING FROM THE HOUSING TO AFFORD THE OPPOSITE END OF THE BUFFER; RELATIVE MOVEMENT OF THE HOUSING AND THE PISTON IN ONE AXIAL DIRECTION PLACING HYDRAULIC LIQUID IN SAID WORKING CHAMBER ON ONE END OF THE PISTON UNDER SUBSTANTIAL PRESSURE, HYDRODYNAMIC PISTON CENTERING BEARING MEANS INCLUDING CIRCUMFERENTIALLY SPACED POCKETS IN SAID PERIMETER SPACED FROM SAID PRESSURE END OF THE PISTON AND WITH A CONTINUOUS INTERVENING CYLINDRICAL PORTION OF SAID PERIMETER BETWEEN SAID POCKETS AND SAID END, AND MEANS DEFINING COMMUNICATION PASSAGES THROUGH SAID PISTON BETWEEN SAID PRESSURE END AND SAID POCKETS AND BYPASSING SAID INTERVENING PERIMETER PORTION.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-01-22 | 1971-07-24 | 1972-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-22 | 1975-07-24 | 1976-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-22 | 1979-07-24 | 1980-01-23 | $7700.00 | Window Closed / Lapsed |