US3237407A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic system
Assignee: New York Air Brake LLC
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Filing: 1964-05-25
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Granted: 1966-03-01
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Expires: 1984-05-25
Abstract
No abstract record available.
Inventors
- 👤 Lyston C Jennings
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:30
CPC Classifications
F; F16; F16H; F16H61/00; F16H61/38; F16H61/40; F16H61/4148; F16H39/00; F16H39/02; F16H61/42; F16H61/433; F16H61/44; F16H61/452
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
IN COMBINATION (A) A VARIABLE DELIVERY DISCHARGE PRESSURE COMPENSATED HYDRAULIC PUMP INCLUDING A DELIVERY CONTROL ELEMENT MOVABLE IN DELIVERY-INCREASING AND DELIVERYDECREASING DIRECTIONS; (B) A PAIR OF HYDRAULIC MOTORS; (C) CIRCUIT MEANS INTERCONNECTING THE PUMP AND MOTORS SO THAT THE FLUID DISCHARGED BY THE PUMP MAY BE DELIVERED TO ONE MOTOR OR TO BOTH MOTORS IN PARALLEL; AND (D) PUMP DELIVERY-LIMITING MEANS AUTOMATICALLY EFFECTIVE UPON OPERATION OF ONE MOTOR TO PREVENT MOVEMENT OF THE DELIVERY CONTROL ELEMENT IN THE DELIVERYINCREASING DIRECTION BEYOND A FIRST POSITION, AND EFFECTIVE UPON OPERATION OF BOTH MOTORS TO PERMIT MOVEMENT OF THE DELIVERY CONTROL ELEMENT IN THE DELIVERYINCREASING DIRECTION TO A POSITION BEYOND SAID FIRST POSITION.
Claim 2
Dependent Claim
110 words
IN COMBINATION (A) A VARIABLE DELIVERY DISCHARGE PRESSURE COMPENSATED HYDRAULIC PUMP INCLUDING A DELIVERY CONTROL ELEMENT MOVABLE IN DELIVERY-INCREASING AND DELIVERYDECREASING DIRECTIONS; (B) A PAIR OF HYDRAULIC MOTORS; (C) CIRCUIT MEANS INTERCONNECTING THE PUMP AND MOTORS SO THAT THE FLUID DISCHARGED BY THE PUMP MAY BE DELIVERED TO ONE MOTOR OR TO BOTH MOTORS IN PARALLEL; AND (D) PUMP DELIVERY-LIMITING MEANS AUTOMATICALLY EFFECTIVE UPON OPERATION OF ONE MOTOR TO PREVENT MOVEMENT OF THE DELIVERY CONTROL ELEMENT IN THE DELIVERYINCREASING DIRECTION BEYOND A FIRST POSITION, AND EFFECTIVE UPON OPERATION OF BOTH MOTORS TO PERMIT MOVEMENT OF THE DELIVERY CONTROL ELEMENT IN THE DELIVERYINCREASING DIRECTION TO A POSITION BEYOND SAID FIRST POSITION.
References Cited (Backward Citations)
US2867091A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-28 | 1969-08-30 | 1970-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-28 | 1973-08-30 | 1974-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-28 | 1977-08-30 | 1978-03-01 | $7700.00 | Window Closed / Lapsed |