Patent US3113489A successfully refreshed from Google Patents.
US3113489A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Servo motor
Assignee: Wagner Electric Corp
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Filing: 1962-04-09
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Granted: 1963-12-10
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Expires: 1982-04-09
Abstract
No abstract record available.
Inventors
- 👤 Oliver B Cruse
- 👤 Cyril B Fites
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:46
CPC Classifications
F; F15; F15B; F15B17/00; B; B60; B60T; B60T13/00; B60T13/10; B60T13/24; B60T13/241; B60T13/242; B60T13/245
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
234 words
A FLUID PRESSURE OPERATED SERVO MOTOR COMPRISING A HOUSING HAVING ALIGNED BORES THEREIN, A POWER PISTON SLIDABLE IN ONE OF SAID BORES AND HAVING A WORK PRODUCING END EXTENDING EXTERIORLY OF SAID ONE BORE, A PRESSURE FLUID INLET IN SAID POWER PISTON ADJACENT THE WORK PRODUCING END THEREOF, A REACTION PISTON SLIDABLE IN THE OTHER OF SAID BORES, A WORKING CHAMBER BETWEEN SAID POWER AND REACTION PISTONS, PASSAGE MEANS IN SAID POWER PISTON BETWEEN SAID INLET AND WORKING CHAMBER, VALVE MEANS IN SAID PASSAGE MEANS CONTROLLING PRESSURE FLUID COMMUNICATION BETWEEN SAID INLET AND WORKING CHAMBER, A VALVE STEM ON SAID REACTION PISTON HAVING AN EXHAUST PASSAGE THEREIN BETWEEN SAID WORKING CHAMBER AND OTHER BORE, AN EXHAUST PORT IN SAID OTHER BORE, A CYLINDER EXTENDING COAXIALLY INTO SAID OTHER BORE, A SLAVE PISTON SLIDABLE IN SAID CYLINDER AND ENGAGED WITH SAID REACTION PISTON, AND A CONTROL PORT IN SAID CYLINDER, SAID SLAVE PISTON BEING MOVABLE IN RESPONSE TO FLUID PRESSURE IN SAID CONTROL PORT TO MOVE SAID REACTION PISTON AND ENGAGE SAID VALVE STEM WITH SAID VALVE MEANS CLOSING SAID EXHAUST PASSAGE AND TO MOVE SAID VALVE MEANS TO A POSITION ESTABLISHING PRESSURE FLUID COMMUNICATION BETWEEN SAID INLET AND WORKING CHAMBER, AND SAID POWER PISTON BEING MOVABLE IN FOLLOW-UP RELATION WITH SAID REACTION PISTON IN RESPONSE TO FLUID PRESSURE IN SAID WORKING CHAMBER TO MOVE THE WORK PRODUCING END THEREOF IN A WORK PRODUCING DIRECTION.
Claim 2
Dependent Claim
234 words
A FLUID PRESSURE OPERATED SERVO MOTOR COMPRISING A HOUSING HAVING ALIGNED BORES THEREIN, A POWER PISTON SLIDABLE IN ONE OF SAID BORES AND HAVING A WORK PRODUCING END EXTENDING EXTERIORLY OF SAID ONE BORE, A PRESSURE FLUID INLET IN SAID POWER PISTON ADJACENT THE WORK PRODUCING END THEREOF, A REACTION PISTON SLIDABLE IN THE OTHER OF SAID BORES, A WORKING CHAMBER BETWEEN SAID POWER AND REACTION PISTONS, PASSAGE MEANS IN SAID POWER PISTON BETWEEN SAID INLET AND WORKING CHAMBER, VALVE MEANS IN SAID PASSAGE MEANS CONTROLLING PRESSURE FLUID COMMUNICATION BETWEEN SAID INLET AND WORKING CHAMBER, A VALVE STEM ON SAID REACTION PISTON HAVING AN EXHAUST PASSAGE THEREIN BETWEEN SAID WORKING CHAMBER AND OTHER BORE, AN EXHAUST PORT IN SAID OTHER BORE, A CYLINDER EXTENDING COAXIALLY INTO SAID OTHER BORE, A SLAVE PISTON SLIDABLE IN SAID CYLINDER AND ENGAGED WITH SAID REACTION PISTON, AND A CONTROL PORT IN SAID CYLINDER, SAID SLAVE PISTON BEING MOVABLE IN RESPONSE TO FLUID PRESSURE IN SAID CONTROL PORT TO MOVE SAID REACTION PISTON AND ENGAGE SAID VALVE STEM WITH SAID VALVE MEANS CLOSING SAID EXHAUST PASSAGE AND TO MOVE SAID VALVE MEANS TO A POSITION ESTABLISHING PRESSURE FLUID COMMUNICATION BETWEEN SAID INLET AND WORKING CHAMBER, AND SAID POWER PISTON BEING MOVABLE IN FOLLOW-UP RELATION WITH SAID REACTION PISTON IN RESPONSE TO FLUID PRESSURE IN SAID WORKING CHAMBER TO MOVE THE WORK PRODUCING END THEREOF IN A WORK PRODUCING DIRECTION.
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) | 1966-12-09 | 1967-06-10 | 1967-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-12-09 | 1971-06-10 | 1971-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-12-09 | 1975-06-10 | 1975-12-10 | $7700.00 | Window Closed / Lapsed |