US3145055A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spring motor operated tilting dump truck
Assignee: Individual
•
Filing: 1959-02-12
•
Granted: 1964-08-18
•
Expires: 1979-02-12
Abstract
No abstract record available.
Inventors
- 👤 Joseph H Carter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 02:51
CPC Classifications
A; A63; A63H; A63H17/00; A63H17/05; A63H17/06; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7847; Y10T137/7849
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
A DUAL PISTON AND CYLINDER STRUCTURE COMPRISING TWO CYLINDERS HAVING INNER AND OUTER ENDS, THE INNER ENDS HAVING A WALL SEPARATING THEM WITH OPENINGS PROVIDED THEREIN THROUGH WHICH SAID CYLINDERS HAVE COMMUNICATION, CHECK VALVE MEANS HOUSED IN SAID WALL COOPERATING WITH SAID OPENINGS TO CONTROL FLUID FLOW BETWEEN SAID CYLINDERS TO PROVIDE A CERTAIN RATE OF FLOW IN ONE DIRECTION BETWEEN SAID CYLINDERS WITH SAID CHECK VALVE MEANS SEATED AND A DIFFERENT RATE OF FLOW IN THE OPPOSITE DIRECTION WITH SAID CHECK VALVE MEANS UNSEATED, THE OUTER ENDS OF SAID CYLINDERS HAVING WALLS THEREIN, A PISTON RECIPROCABLE IN ONE OF SAID CYLINDERS HAVING A ROD CONNECTED THEREWITH AND EX-
Claim 2
Dependent Claim
109 words
A DUAL PISTON AND CYLINDER STRUCTURE COMPRISING TWO CYLINDERS HAVING INNER AND OUTER ENDS, THE INNER ENDS HAVING A WALL SEPARATING THEM WITH OPENINGS PROVIDED THEREIN THROUGH WHICH SAID CYLINDERS HAVE COMMUNICATION, CHECK VALVE MEANS HOUSED IN SAID WALL COOPERATING WITH SAID OPENINGS TO CONTROL FLUID FLOW BETWEEN SAID CYLINDERS TO PROVIDE A CERTAIN RATE OF FLOW IN ONE DIRECTION BETWEEN SAID CYLINDERS WITH SAID CHECK VALVE MEANS SEATED AND A DIFFERENT RATE OF FLOW IN THE OPPOSITE DIRECTION WITH SAID CHECK VALVE MEANS UNSEATED, THE OUTER ENDS OF SAID CYLINDERS HAVING WALLS THEREIN, A PISTON RECIPROCABLE IN ONE OF SAID CYLINDERS HAVING A ROD CONNECTED THEREWITH AND EX-
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-08-18 | 1968-02-17 | 1968-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-18 | 1972-02-17 | 1972-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-18 | 1976-02-17 | 1976-08-18 | $7700.00 | Window Closed / Lapsed |