Patent US6849051B2 successfully refreshed from Google Patents.
US3334488A
Expired / Lapsed
US
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Control system for hydraulic tractor attachments and the like
Assignee: Individual
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Filing: 1965-10-21
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Granted: 1967-08-08
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Expires: 1985-10-21
Abstract
No abstract record available.
Inventors
- 👤 John A Lauck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:58
CPC Classifications
B; B60; B60K; B60K28/00; B60K28/02; B60K28/04; F; F15; F15B; F15B11/00; F15B11/16; F15B2211/00; F15B2211/20; F15B2211/205; F15B2211/20576; F15B2211/30; F15B2211/31; F15B2211/3105; F15B2211/3116; F15B2211/32; F15B2211/321; F15B2211/324; F15B2211/50; F15B2211/505; F15B2211/50509; F15B2211/50518; F15B2211/52; F15B2211/521; F15B2211/70; F15B2211/705; F15B2211/7058; F15B2211/71; F15B2211/78; F15B2211/781; F15B2211/80; F15B2211/85; F15B2211/865
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
125 words
IN COMBINATION, A HYDROSTATIC TRANSMISSION, A MAKEUP PUMP, A HYDRAULIC MOTOR, AND A CONTROL SYSTEM FOR DIRECTING HIGH PRESSURE FLUID FROM SAID MAKE-UP PUMP TO SAID HYDRAULIC MOTOR AND SAID HYDROSTATIC TRANSMISSION, SAID CONTROL SYSTEM BEING DISPOSED BETWEEN SAID HYDROSTATIC TRANSMISSION AND SAID MAKE-UP PUMP WHEREBY THE FLUID FROM SAID MAKE-UP PUMP MUST FIRST PASS THROUGH SAID CONTROL SYSTEM BEFORE ENTERING SAID HYDROSTATIC TRANSMISSION, SAID CONTROL SYSTEM COMPRISING A VALVE MEANS OPERATIVE IN ONE POSITION TO PERMIT SUCH FLUID FROM SAID MAKE-UP PUMP TO BY-PASS SAID HYDRAULIC MOTOR AND FLOW DIRECTLY TO SAID HYDROSTATIC TRANSMISSION, AND OPERATIVE IN ANOTHER POSITION TO DIRECT SUCH FLUID THROUGH SAID HYDRAULIC MOTOR TO ACTUATE THE SAME AND DIRECT THE RETURN FLUID FROM SAID HYDRAULIC MOTOR TO SAID HYDROSTATIC TRANSMISSION.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-08-07 | 1971-02-06 | 1971-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-07 | 1975-02-06 | 1975-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-07 | 1979-02-06 | 1979-08-08 | $7700.00 | Window Closed / Lapsed |