US3230711A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic motor means
Assignee: Westinghouse Air Brake Co
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Filing: 1964-02-13
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Granted: 1966-01-25
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Expires: 1984-02-13
Abstract
No abstract record available.
Inventors
- 👤 James C Swain
- 👤 George E Manning
- 👤 David L Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:55
CPC Classifications
B; B25; B25D; B25D9/00; B25D9/06; B25D9/12; E; E21; E21B; E21B6/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
A HYDRAULIC DRIVING APPARATUS COMPRISING, A HOUSING, A SOURCE OF HYDRAULIC FLUID PRESSURE COMMUNICATING WITH SAID HOUSING, A STRIKER ELEMENT SLIDABLY CARRIED FOR RECIPROCATION IN SAID HOUSING, RESILIENT MEANS URGING SAID STRIKER ELEMENT IN A FIRST DIRECTION, AN IMPACT PISTON CARRIED FOR RECIPROCATION IN SAID HOUSING TO MOVE SAID STRIKER ELEMENT IN A SECOND DIRECTION TO MOMENTARILY OVERCOME SAID RESILIENT MEANS, A VALVE PISTON CARRIED FOR RECIPROCATION IN SAID HOUSING FOR CONTROLLING FLUID PRESSURE FROM SAID SOURCE TO SAID IMPACT PISTON, AND AN ACCUMULATOR COMMUNICATING WITH THE HYDRAULIC CIRCUIT CLOSELY ADJACENT TO SAID IMPACT PISTON TO STORE ENERGY AND MAINTAIN FLUID PRESSURE SIMULTANEOUSLY ON SAID VALVE PISTON AND SAID IMPACT PISTON AND THEREBY OFFSET THE VARIATIONS IN FLOW REQUIREMENTS DURING CYCLING OF SAID IMPACT PISTON.
Claim 2
Dependent Claim
125 words
A HYDRAULIC DRIVING APPARATUS COMPRISING, A HOUSING, A SOURCE OF HYDRAULIC FLUID PRESSURE COMMUNICATING WITH SAID HOUSING, A STRIKER ELEMENT SLIDABLY CARRIED FOR RECIPROCATION IN SAID HOUSING, RESILIENT MEANS URGING SAID STRIKER ELEMENT IN A FIRST DIRECTION, AN IMPACT PISTON CARRIED FOR RECIPROCATION IN SAID HOUSING TO MOVE SAID STRIKER ELEMENT IN A SECOND DIRECTION TO MOMENTARILY OVERCOME SAID RESILIENT MEANS, A VALVE PISTON CARRIED FOR RECIPROCATION IN SAID HOUSING FOR CONTROLLING FLUID PRESSURE FROM SAID SOURCE TO SAID IMPACT PISTON, AND AN ACCUMULATOR COMMUNICATING WITH THE HYDRAULIC CIRCUIT CLOSELY ADJACENT TO SAID IMPACT PISTON TO STORE ENERGY AND MAINTAIN FLUID PRESSURE SIMULTANEOUSLY ON SAID VALVE PISTON AND SAID IMPACT PISTON AND THEREBY OFFSET THE VARIATIONS IN FLOW REQUIREMENTS DURING CYCLING OF SAID IMPACT PISTON.
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) | 1969-01-24 | 1969-07-26 | 1970-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-24 | 1973-07-26 | 1974-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-24 | 1977-07-26 | 1978-01-25 | $7700.00 | Window Closed / Lapsed |