US3105603A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tractor loaders
Assignee: Frank G Hough Co
•
Filing: 1959-05-28
•
Granted: 1963-10-01
•
Expires: 1979-05-28
Abstract
No abstract record available.
Inventors
- 👤 Ralph L Beyerstedt
- 👤 Jr Julius C Laegeler
- 👤 Don S Strader
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:57
CPC Classifications
E; E02; E02F; E02F9/00; E02F9/20; E02F9/22; E02F9/2221; Y; Y10; Y10S; Y10S8/00; Y10S8/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
IN A TRACTOR LOADER HAVING A SOURCE OF CONSTANT VOLUME HYDRAULIC FLUID UNDER PRESSURE AND A FLUID RESERVOIR, A PAIR OF HYDRAULIC RAMS MECHANICALLY INTERLOCKED FOR PERFORMING THE SAME MATERIAL HANDLING FUNCTION, AS HYDRAULIC VALVE OPERABLE TO TWO POSITIONS, HYDRAULIC FLUID CONDUIT MEANS INTERCONNECTING SAID SOURCE OF HYDRAULIC FLUID, SAID RESERVOIR, THE HEAD AND ROD ENDS OF SAID HYDRAULIC RAMS AND SAID VALVE, SAID HYDRAULIC FLUID CONDUITS BEING CONNECTED AND SAID HYDRAULIC VALVE BEING FORMED SO THAT IN THE FIRST OPERATED POSITION OF SAID HYDRAULIC VALVE, THE HEAD AND ROD ENDS OF ONE OF SAID HYDRAULIC RAMS ARE RESPECTIVELY CONNECTED TO SAID SOURCE OF HYDRAULIC FLUID AND SAID RESERVOIR AND THE HEAD AND ROD ENDS OF THE OTHER SAID HYDRAULIC RAMS ARE CONNECTED IN FREE FLUID COMMUNICATION, AND SO THAT WHEN SAID HYDRAULIC VALVE IS OPERATED
Claim 2
Dependent Claim
136 words
IN A TRACTOR LOADER HAVING A SOURCE OF CONSTANT VOLUME HYDRAULIC FLUID UNDER PRESSURE AND A FLUID RESERVOIR, A PAIR OF HYDRAULIC RAMS MECHANICALLY INTERLOCKED FOR PERFORMING THE SAME MATERIAL HANDLING FUNCTION, AS HYDRAULIC VALVE OPERABLE TO TWO POSITIONS, HYDRAULIC FLUID CONDUIT MEANS INTERCONNECTING SAID SOURCE OF HYDRAULIC FLUID, SAID RESERVOIR, THE HEAD AND ROD ENDS OF SAID HYDRAULIC RAMS AND SAID VALVE, SAID HYDRAULIC FLUID CONDUITS BEING CONNECTED AND SAID HYDRAULIC VALVE BEING FORMED SO THAT IN THE FIRST OPERATED POSITION OF SAID HYDRAULIC VALVE, THE HEAD AND ROD ENDS OF ONE OF SAID HYDRAULIC RAMS ARE RESPECTIVELY CONNECTED TO SAID SOURCE OF HYDRAULIC FLUID AND SAID RESERVOIR AND THE HEAD AND ROD ENDS OF THE OTHER SAID HYDRAULIC RAMS ARE CONNECTED IN FREE FLUID COMMUNICATION, AND SO THAT WHEN SAID HYDRAULIC VALVE IS OPERATED
References Cited (Backward Citations)
US2732963A
Cited
US2292278A
Cited
US2590454A
Cited
US2628731A
Cited
US2912007A
Cited
US2902053A
Cited
US2935852A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-09-30 | 1967-04-01 | 1967-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-30 | 1971-04-01 | 1971-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-30 | 1975-04-01 | 1975-10-01 | $7700.00 | Window Closed / Lapsed |