Patent US3237794A successfully refreshed from Google Patents.
US3237794A
Expired / Lapsed
US
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Tractor mechanism
Assignee: Case LLC
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Filing: 1964-09-15
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Granted: 1966-03-01
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Expires: 1984-09-15
Abstract
No abstract record available.
Inventors
- 👤 Raymond J Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:31
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/28; E02F3/34; E02F3/3405; E02F3/3408; E02F9/00; E02F9/20; E02F9/22; E02F9/2221; E02F9/2239; E02F9/2278; E02F9/2292
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
A HYDRAULICALLY ACTUATED TRACTOR LOADER HAVING AN ENGINE, AN IMPOSITIVE TYPE OF MAIN DRIVE HAVING AN OUTPUT, TRACTION MEANS DRIVEN FROM THE OUTPUT, A BUCKET ON THE TRACTOR FOR MOVING MATERIAL, A HYDRAULIC MOTOR ON THE TRACTOR FOR RAISING AND LOWERING SAID BUCKET AND HYDRAULIC MOTOR ON THE TRACTOR FOR TILTING SAID BUCKET, CONTROL MEANS ON THE TRACTOR FOR REGULATING THE FLOW OF FLUID TO SAID HYDRALIC MOTORS, AND CONDUIT MEANS FOR CARRYING SAID FLUID, MEANS FOR SUPPLYING HYDRAULIC FLUID UNDER PRESSURE COMPRISING A DIFFERENTIAL GEAR DRIVEN IN PART FROM SAID ENGINE AND IN PART FROM THE MAIN DRIVE OUPUT, AND A FLUID PUMP ARRANGED TO BE RESPONSIVE TO SAID DIFFERENTIAL GEAR WHEREBY SAID PUMP IS DRIVEN SO AS TO SUPPLY FLUID AT A RATE WHICH IS A FUNCTION OF THE DIFFERENCE BETWEEN THE SPEED OF SAID ENGINE AND THE SPEED OF SAID OUTPUT OF SAID MAIN DRIVE.
Claim 2
Dependent Claim
148 words
A HYDRAULICALLY ACTUATED TRACTOR LOADER HAVING AN ENGINE, AN IMPOSITIVE TYPE OF MAIN DRIVE HAVING AN OUTPUT, TRACTION MEANS DRIVEN FROM THE OUTPUT, A BUCKET ON THE TRACTOR FOR MOVING MATERIAL, A HYDRAULIC MOTOR ON THE TRACTOR FOR RAISING AND LOWERING SAID BUCKET AND HYDRAULIC MOTOR ON THE TRACTOR FOR TILTING SAID BUCKET, CONTROL MEANS ON THE TRACTOR FOR REGULATING THE FLOW OF FLUID TO SAID HYDRALIC MOTORS, AND CONDUIT MEANS FOR CARRYING SAID FLUID, MEANS FOR SUPPLYING HYDRAULIC FLUID UNDER PRESSURE COMPRISING A DIFFERENTIAL GEAR DRIVEN IN PART FROM SAID ENGINE AND IN PART FROM THE MAIN DRIVE OUPUT, AND A FLUID PUMP ARRANGED TO BE RESPONSIVE TO SAID DIFFERENTIAL GEAR WHEREBY SAID PUMP IS DRIVEN SO AS TO SUPPLY FLUID AT A RATE WHICH IS A FUNCTION OF THE DIFFERENCE BETWEEN THE SPEED OF SAID ENGINE AND THE SPEED OF SAID OUTPUT OF SAID MAIN DRIVE.
References Cited (Backward Citations)
US2807379A
Cited
US2959070A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-28 | 1969-08-30 | 1970-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-28 | 1973-08-30 | 1974-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-28 | 1977-08-30 | 1978-03-01 | $7700.00 | Window Closed / Lapsed |