US3235010A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Load depth control valve
Assignee: Case LLC
•
Filing: 1964-01-30
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Granted: 1966-02-15
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Expires: 1984-01-30
Abstract
No abstract record available.
Inventors
- 👤 Max R North
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:03
CPC Classifications
A; A01; A01B; A01B63/00; A01B63/02; A01B63/10; A01B63/111; A01B63/112; Y; Y10; Y10S; Y10S60/00; Y10S60/907
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
IN A TRACTOR HYDRAULIC SYSTEM HAVING A VALVE CASE INTERPOSED BETWEEN AN IMPLEMENT-ACTUATING CYLINDER AND A PUMP AND INCLUDING A SUMP CONNECTION, AND A VALVE SPOOL AXIALLY DISPLACEABLE IN SAID VALVE CASE IN ACCORDANCE WITH THE DRAFT-INDUCED PERFORMANCE OF THE IMPLEMENT, THE IMPROVEMENTS OF AXIALLY DISPLACEABLE FLOW-DIVIDING MEANS HAVING AN INFLUENT OPENING THROUGH WHICH ESSENTIALLY ALL OF THE PUMP OUTPUT FLOWS AND A PLURALITY OF EFFLUENT OPENING FOR SPLITTING THE PUMP OUTPUT INTO TOW COMPONENTS, MEANS RESPONSIVE TO THE DISPLACEMENT OF THE SPOOL VALVE TO A FIRST LIFT POSITION TO CONNECT ONLY ONE OF
Claim 2
Dependent Claim
94 words
IN A TRACTOR HYDRAULIC SYSTEM HAVING A VALVE CASE INTERPOSED BETWEEN AN IMPLEMENT-ACTUATING CYLINDER AND A PUMP AND INCLUDING A SUMP CONNECTION, AND A VALVE SPOOL AXIALLY DISPLACEABLE IN SAID VALVE CASE IN ACCORDANCE WITH THE DRAFT-INDUCED PERFORMANCE OF THE IMPLEMENT, THE IMPROVEMENTS OF AXIALLY DISPLACEABLE FLOW-DIVIDING MEANS HAVING AN INFLUENT OPENING THROUGH WHICH ESSENTIALLY ALL OF THE PUMP OUTPUT FLOWS AND A PLURALITY OF EFFLUENT OPENING FOR SPLITTING THE PUMP OUTPUT INTO TOW COMPONENTS, MEANS RESPONSIVE TO THE DISPLACEMENT OF THE SPOOL VALVE TO A FIRST LIFT POSITION TO CONNECT ONLY ONE OF
References Cited (Backward Citations)
CA626604A
Cited
US2737196A
Cited
US2958384A
Cited
US2847030A
Cited
US2851938A
Cited
FR1222459A
Cited
FR1233544A
Cited
US3120278A
Cited
FR1314084A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-14 | 1969-08-16 | 1970-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-14 | 1973-08-16 | 1974-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-14 | 1977-08-16 | 1978-02-15 | $7700.00 | Window Closed / Lapsed |