US3324964A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tractor having hydraulic drive and controls
Assignee: Individual
•
Filing: 1964-06-01
•
Granted: 1967-06-13
•
Expires: 1984-06-01
Abstract
No abstract record available.
Inventors
- 👤 Carey L Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 01:46
CPC Classifications
B; B62; B62D; B62D49/00; B62D49/06; B62D49/0678; B62D49/08; Y; Y10; Y10S; Y10S180/00; Y10S180/90
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
175 words
A TRACTOR INCLUDING A FRAME, A PAIR OF HYDRAULIC MOTORS CARRIED BY SAID FRAME, A PAIR OF DRIVE WHEELS, ONE OF SAID DRIVE WHEELS BEING CARRIED BY EACH OF SAID HYDRAULIC MOTORS TO BE DRIVEN BY THE HYDRAULIC MOTOR, A PRIME MOVER IN SAID FRAME AND MOVABLE LONGITUDINALLY OF SAID FRAME, A PAIR OF HYDRAULIC PUMPS MOUNTED ADJAENT SAID PRIME MOVER AND BEING MOVABLE THEREWITH, EACH OF SAID HYDRAULIC PUMPS BEING ARRANGED TO DRIVE ONE OF SAID HYDRAULIC MOTORS, HYDRAULIC MEANS FOR MOVING SAID PRIME MOVER LONGITUDINALLY OF SAID FRAME, SAID HYDRAULIC MEANS BEING RESPONSIVE TO THE HIGH PRESSURE LINES OF SAID HYDRAULIC MOTORS, THE ARRANGEMENT BEING SUCH THAT WHEN THE PRESSURE IN THE HIGH PRESSURE LINE IS HIGH THE PRIME MOVER WILL BE MOVED AWAY FROM SAID DRIVE WHEELS, AND WHEN THE PRESSURE IN SAID HIGH PRESSURE LINE IS LOW, SAID PRIME MOVER WILL BE MOVED TOWARD SAID DRIVE WHEELS, SAID PAIR OF HYDRAULIC PUMPS HAVING A VARIABLE OUTPUT PRESSURE, AND CONTROL MEANS FOR VARYING THE OUTPUT PRESSURE OF SAID PAIR OF HYDRAULIC PUMPS.
Claim 2
Dependent Claim
175 words
A TRACTOR INCLUDING A FRAME, A PAIR OF HYDRAULIC MOTORS CARRIED BY SAID FRAME, A PAIR OF DRIVE WHEELS, ONE OF SAID DRIVE WHEELS BEING CARRIED BY EACH OF SAID HYDRAULIC MOTORS TO BE DRIVEN BY THE HYDRAULIC MOTOR, A PRIME MOVER IN SAID FRAME AND MOVABLE LONGITUDINALLY OF SAID FRAME, A PAIR OF HYDRAULIC PUMPS MOUNTED ADJAENT SAID PRIME MOVER AND BEING MOVABLE THEREWITH, EACH OF SAID HYDRAULIC PUMPS BEING ARRANGED TO DRIVE ONE OF SAID HYDRAULIC MOTORS, HYDRAULIC MEANS FOR MOVING SAID PRIME MOVER LONGITUDINALLY OF SAID FRAME, SAID HYDRAULIC MEANS BEING RESPONSIVE TO THE HIGH PRESSURE LINES OF SAID HYDRAULIC MOTORS, THE ARRANGEMENT BEING SUCH THAT WHEN THE PRESSURE IN THE HIGH PRESSURE LINE IS HIGH THE PRIME MOVER WILL BE MOVED AWAY FROM SAID DRIVE WHEELS, AND WHEN THE PRESSURE IN SAID HIGH PRESSURE LINE IS LOW, SAID PRIME MOVER WILL BE MOVED TOWARD SAID DRIVE WHEELS, SAID PAIR OF HYDRAULIC PUMPS HAVING A VARIABLE OUTPUT PRESSURE, AND CONTROL MEANS FOR VARYING THE OUTPUT PRESSURE OF SAID PAIR OF HYDRAULIC PUMPS.
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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) | 1970-06-12 | 1970-12-12 | 1971-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-12 | 1974-12-12 | 1975-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-12 | 1978-12-12 | 1979-06-13 | $7700.00 | Window Closed / Lapsed |