US3210869A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic circuit having two pumps for self-loading scrapers
Assignee: Caterpillar Inc
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Filing: 1963-04-19
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Granted: 1965-10-12
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Expires: 1983-04-19
Abstract
No abstract record available.
Inventors
- 👤 Allyn J Hein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:52
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/64; E02F3/65; E02F3/651; B; B60; B60J; B60J1/00; B60J1/02; B60J1/04; E02F3/6454; E02F3/6481; E02F3/652; E02F3/654; E02F3/656
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
170 words
IN A SELF-LOADING SCRAPER INCLUDING A VERTICALLY ADJUSTABLE SCRAPER BOWL HAVING A MOVABLE FLOOR, AN EJECTOR PLATE IN THER EAR OF SAID BOWL AND A CONVEYOR IN THE FRONT OF SAID BOWL COMPRISING IN COMBINATION; FIRST SECOND AND THIRD JACKS AND A MOTOR FOR ACTUATING RESPECTIVELY SAID BOWL, FLOOR AND EJECTOR PLATE, AND CONVEYOR; A HYDRAULIC SYSTEM FOR ACTUATING SAID JACKS AND MOTOR INCLUDING A FIRST VALVE CONNECTED TO SAID FIRST JACK AND SELECTIVELY OPERABLE TO SUPPLY FLUID TO EITHER END OF SAID JACK, A SECOND VALVE CONNECTED TO SAID SECOND AND THIRD JACKS AND SELECTIVELY OPERABLE TO SUPPLY FLUID TO EITHER END OF SAID SECOND AND THIRD JACKS, A THIRD VALVE CONNECTED TO SAID MOTOR AND SELECTIVELY OPERABLE TO SUPPLY FLUID TO DRIVE SAID MOTOR IN EITHER DIRECTION, AND MEANS FOR SUPPLYING FLUID UNDER PRESSURE TO SAID VALVES INCLUDING A PAIR OF PUMPS OF DIFFERENT CAPACITIES, THE LOWER CAPACITY PUMP BEING CONNECTED TO SAID FIRST AND SECOND VALVES AND THE HIGHER CAPACITY PUMP BEING CONNECTED TO SAID THIRD VALVE.
Claim 2
Dependent Claim
170 words
IN A SELF-LOADING SCRAPER INCLUDING A VERTICALLY ADJUSTABLE SCRAPER BOWL HAVING A MOVABLE FLOOR, AN EJECTOR PLATE IN THER EAR OF SAID BOWL AND A CONVEYOR IN THE FRONT OF SAID BOWL COMPRISING IN COMBINATION; FIRST SECOND AND THIRD JACKS AND A MOTOR FOR ACTUATING RESPECTIVELY SAID BOWL, FLOOR AND EJECTOR PLATE, AND CONVEYOR; A HYDRAULIC SYSTEM FOR ACTUATING SAID JACKS AND MOTOR INCLUDING A FIRST VALVE CONNECTED TO SAID FIRST JACK AND SELECTIVELY OPERABLE TO SUPPLY FLUID TO EITHER END OF SAID JACK, A SECOND VALVE CONNECTED TO SAID SECOND AND THIRD JACKS AND SELECTIVELY OPERABLE TO SUPPLY FLUID TO EITHER END OF SAID SECOND AND THIRD JACKS, A THIRD VALVE CONNECTED TO SAID MOTOR AND SELECTIVELY OPERABLE TO SUPPLY FLUID TO DRIVE SAID MOTOR IN EITHER DIRECTION, AND MEANS FOR SUPPLYING FLUID UNDER PRESSURE TO SAID VALVES INCLUDING A PAIR OF PUMPS OF DIFFERENT CAPACITIES, THE LOWER CAPACITY PUMP BEING CONNECTED TO SAID FIRST AND SECOND VALVES AND THE HIGHER CAPACITY PUMP BEING CONNECTED TO SAID THIRD VALVE.
Claim 3
Dependent Claim
135 words
IN A SELF-LOADING SCRAPER INCLUDING A VERTICALLY ADJUSTABLE SCRAPER BOWL HAVINGA MOVABLE FLOOR, AN EJECTOR PLATE IN THE REAR OF THE BOWL AND AN HYDRAULICALLY DRIVEN CONVEYOR IN THE FRONT OF THE BOWL, THE COMBINATION COMPRISING; A FIRST HYDRAULIC CIRCUIT INCLUDING HYDRAULICALLY ACTUATED JACKS FOR ACTUATING EACH OF THE BOWL, MOVABLE FLOOR AND EJECTOR PLATE; A FIRST PUMP HYDRAULICALLY ASSOCIATED WITH SAID FIRST CIRCUIT TO PROVIDE PRESSURE FLUID THEREFOR; A SECOND HYDRAULIC CIRCUIT INCLUDING THE CONVEYOR DRIVE MEANS; A SECOND PUMP HYDRAULICALLY ASSOCIATED WITH SAID SECOND CIRCUIT TO PROVIDE PRESSURE FLUID THEREFOR; AND VALVE MEANS HYDRAULICALLY DISPOSED BETWEEN SAID FIRST PUMP AND SAID SECOND CIRCUIT, SAID VALVE MEANS SELECTIVELY OPERABLE TO COMMUNICATE SAID FIRST CIRCUIT WITH SAID SECOND PUMP WHEREBY THE PRESSURE FLUID FROM BOTH OF SAID PUMPS IS DIRECTED TO THE CONVEYOR DRIVE MEANS.
Claim 4
Dependent Claim
135 words
IN A SELF-LOADING SCRAPER INCLUDING A VERTICALLY ADJUSTABLE SCRAPER BOWL HAVINGA MOVABLE FLOOR, AN EJECTOR PLATE IN THE REAR OF THE BOWL AND AN HYDRAULICALLY DRIVEN CONVEYOR IN THE FRONT OF THE BOWL, THE COMBINATION COMPRISING; A FIRST HYDRAULIC CIRCUIT INCLUDING HYDRAULICALLY ACTUATED JACKS FOR ACTUATING EACH OF THE BOWL, MOVABLE FLOOR AND EJECTOR PLATE; A FIRST PUMP HYDRAULICALLY ASSOCIATED WITH SAID FIRST CIRCUIT TO PROVIDE PRESSURE FLUID THEREFOR; A SECOND HYDRAULIC CIRCUIT INCLUDING THE CONVEYOR DRIVE MEANS; A SECOND PUMP HYDRAULICALLY ASSOCIATED WITH SAID SECOND CIRCUIT TO PROVIDE PRESSURE FLUID THEREFOR; AND VALVE MEANS HYDRAULICALLY DISPOSED BETWEEN SAID FIRST PUMP AND SAID SECOND CIRCUIT, SAID VALVE MEANS SELECTIVELY OPERABLE TO COMMUNICATE SAID FIRST CIRCUIT WITH SAID SECOND PUMP WHEREBY THE PRESSURE FLUID FROM BOTH OF SAID PUMPS IS DIRECTED TO THE CONVEYOR DRIVE MEANS.
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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) | 1968-10-11 | 1969-04-12 | 1969-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-11 | 1973-04-12 | 1973-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-11 | 1977-04-12 | 1977-10-12 | $7700.00 | Window Closed / Lapsed |