US3170575A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cushioning device for railroad car couplers
Assignee: Individual
•
Filing: 1964-01-13
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Granted: 1965-02-23
•
Expires: 1984-01-13
Abstract
No abstract record available.
Inventors
- 👤 James L Gibson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:44
CPC Classifications
B; B61; B61G; B61G9/00; B61G9/12; B61G9/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
150 words
A CUSHIONING DEVICE FOR RAILROAD CAR COUPLERS COMPRISING, IN COMBINATION WITH A RAILROAD CAR HAVING A PAIR OF COUPLERS ON OPPOSITE ENDS THEREOF, THE COMBINATION OF A PAIR OF HYDRAULIC CYLINDERS, EACH HAVING A PISTON THEREIN, SUPPORTED ON THE CAR ADJACENT THE COUPLERS, EACH OF SAID PISTONS BEING OPERATIVELY CONNECTED TO ONE OF THE COUPLERS, AND TWO OTHER HYDRAULIC-PNEUMATIC CYLINDERS EACH HAVING A FREE FLOATING PISTON THEREIN AND HAVING A LIQUID SPACE AND AN AIR SPACE IN OPPOSITE END THEREOF ON OPPOSITE SIDES OF THE PISTON, THE AIR SPACE OF ONE OF SAID HYDRAULIC-PNEUMATIC CYLINDERS BEING FILLED WITH COMPRESSED AIR AND THE AIR SPACE OF THE OTHER OF SAID HYDRAULIC-PNEUMATIC CYLINDERS BEING FILLED WITH ATMOSPHERIC AIR, THE LIQUID SPACED OF THE HYDRAULIC-PNEUMATIC CYLINDERS BEING IN FLUID COMMUNICATION, RESPECTIVELY, THROUGH CONNECTING LINES, WITH LIQUID SPACES IN OPPOSITE ENDS OF THE FIRST MENTIONED HYDRAULIC CYLINDERS ON OPPOSITE SIDES OF THE PISTONS THEREOF.
Claim 2
Dependent Claim
150 words
A CUSHIONING DEVICE FOR RAILROAD CAR COUPLERS COMPRISING, IN COMBINATION WITH A RAILROAD CAR HAVING A PAIR OF COUPLERS ON OPPOSITE ENDS THEREOF, THE COMBINATION OF A PAIR OF HYDRAULIC CYLINDERS, EACH HAVING A PISTON THEREIN, SUPPORTED ON THE CAR ADJACENT THE COUPLERS, EACH OF SAID PISTONS BEING OPERATIVELY CONNECTED TO ONE OF THE COUPLERS, AND TWO OTHER HYDRAULIC-PNEUMATIC CYLINDERS EACH HAVING A FREE FLOATING PISTON THEREIN AND HAVING A LIQUID SPACE AND AN AIR SPACE IN OPPOSITE END THEREOF ON OPPOSITE SIDES OF THE PISTON, THE AIR SPACE OF ONE OF SAID HYDRAULIC-PNEUMATIC CYLINDERS BEING FILLED WITH COMPRESSED AIR AND THE AIR SPACE OF THE OTHER OF SAID HYDRAULIC-PNEUMATIC CYLINDERS BEING FILLED WITH ATMOSPHERIC AIR, THE LIQUID SPACED OF THE HYDRAULIC-PNEUMATIC CYLINDERS BEING IN FLUID COMMUNICATION, RESPECTIVELY, THROUGH CONNECTING LINES, WITH LIQUID SPACES IN OPPOSITE ENDS OF THE FIRST MENTIONED HYDRAULIC CYLINDERS ON OPPOSITE SIDES OF THE PISTONS THEREOF.
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) | 1968-02-23 | 1968-08-24 | 1969-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-23 | 1972-08-24 | 1973-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-23 | 1976-08-24 | 1977-02-23 | $7700.00 | Window Closed / Lapsed |