Patent US3623320A successfully refreshed from Google Patents.
US3623320A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual source hydrostatic drive
Assignee: Doosan Bobcat North America Inc
•
Filing: 1970-02-09
•
Granted: 1971-11-30
•
Expires: 1990-02-09
Abstract
Abstract A HYDROSTATIC DRIVE FOR OPERATING A SINGLE DEVICE JOINTLY FROM TWO POWER SOURCES, INCLUDING A PAIR OF HYDRALIC PUMPS DRIVE RESPECTIVELY BY THE TWO POWER SOURCES AND A HYDRAULIC MOTOR FOR DRIVING THE DEVICE. TWO RESERVOIRS ARE PROVIDED ALONG WITH A BYPASS VALVE AND THE NECESSARY CONDUITS SO ARRANGED AS TO PROVIDE HIGH EFFCIENCY IN THE OPERATION OF THE SINGLE HYDRAULIC MOTOR JOINTLY BY THE TWO HYDRAULIC PUMPS.
Inventors
- 👤 Sammy R Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:11
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/64; E02F3/6454; E02F3/65; E02F3/651
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-29 | 1975-05-31 | 1975-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-29 | 1979-05-31 | 1979-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-29 | 1983-05-31 | 1983-11-30 | $7700.00 | Window Closed / Lapsed |