US3279558A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flow divider and flow-dividing hydraulic system
Assignee: Fawick Corp
•
Filing: 1962-09-17
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Granted: 1966-10-18
•
Expires: 1982-09-17
Abstract
No abstract record available.
Inventors
- 👤 Jolm D Allen
- 👤 Ray G Holt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:26
CPC Classifications
F; F15; F15B; F15B13/00; F15B13/02; F15B13/022; B; B62; B62D; B62D5/00; B62D5/06; B62D5/07; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2514; Y10T137/2521; Y10T137/2524; Y10T137/2559; Y10T137/2564; Y10T137/2572; Y10T137/2574; Y10T137/2579; Y10T137/2587
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
IN A HYDRAULIC SYSTEM, THE COMBINATION OF FIRST AND SECOND PUMPS, VARIABLE SPEED DRIVE MEANS FOR SAID PUMPS, FIRST AND SECOND FLUID PRESSURE-OPERATED LOAD DEVICES, SAID FIRST PUMP WHEN DRIVEN AT LOW SPEED HAVING AN OUTPUT FLUID FLOW WHICH IS INSUFFICIENT FOR THE OPERATION OF SAID FIRST LOAD DEVICE, AND VALVE MEANS CONNECTED BETWEEN BOTH SAID PUMPS AND BOTH SAID LOAD DEVICES AND OPERATIVE: (A) AT LOW PUMP SPEEDS TO CONNECT BOTH PUMPS TO SAID FIRST LOAD DEVICE; AND (B) AT PROGRESSIVELY HIGHER PUMP SPEEDS TO PROGRESSIVELY RESTRICT THE FLUID FLOW FROM SAID SECOND PUMP TO SAID FIRST LOAD DEVICE AND PROVIDE INCREASING FLUID FLOW FROM SAID SECOND PUMP TO SAID SECOND LOAD DEVICE.
Claim 2
Dependent Claim
114 words
IN A HYDRAULIC SYSTEM, THE COMBINATION OF FIRST AND SECOND PUMPS, VARIABLE SPEED DRIVE MEANS FOR SAID PUMPS, FIRST AND SECOND FLUID PRESSURE-OPERATED LOAD DEVICES, SAID FIRST PUMP WHEN DRIVEN AT LOW SPEED HAVING AN OUTPUT FLUID FLOW WHICH IS INSUFFICIENT FOR THE OPERATION OF SAID FIRST LOAD DEVICE, AND VALVE MEANS CONNECTED BETWEEN BOTH SAID PUMPS AND BOTH SAID LOAD DEVICES AND OPERATIVE: (A) AT LOW PUMP SPEEDS TO CONNECT BOTH PUMPS TO SAID FIRST LOAD DEVICE; AND (B) AT PROGRESSIVELY HIGHER PUMP SPEEDS TO PROGRESSIVELY RESTRICT THE FLUID FLOW FROM SAID SECOND PUMP TO SAID FIRST LOAD DEVICE AND PROVIDE INCREASING FLUID FLOW FROM SAID SECOND PUMP TO SAID SECOND LOAD DEVICE.
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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) | 1969-10-17 | 1970-04-18 | 1970-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-17 | 1974-04-18 | 1974-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-17 | 1978-04-18 | 1978-10-18 | $7700.00 | Window Closed / Lapsed |