US3120157A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid pressure drive system
Assignee: Warner and Swasey Co
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Filing: 1961-04-24
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Granted: 1964-02-04
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Expires: 1981-04-24
Abstract
No abstract record available.
Inventors
- 👤 William R Mello
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:07
CPC Classifications
B; B23; B23Q; B23Q5/00; B23Q5/22; B23Q5/26; B23Q5/266; B23Q5/268; F; F15; F15B; F15B15/00; F15B15/20; F15B15/22; F15B15/224
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
202 words
IN A DRIVE SYSTEM FOR A SLIDE MEMBER, AN ACTUATOR COMPRISING A CYLINDER ELEMENT AND COOPERATING CYLINDRICAL PISTON ELEMENT ONE OF SAID ELEMENTS BEING MOVABLE AND CONNECTED TO SAID SLIDE MEMBER TO RECIPROCATE THE LATTER UPON RECIPROCATION OF THE MOVABLE ELEMENT OF THE ACTUATOR, CONTROL MEANS FOR SAID ACTUATOR INCLUDING A CHANGESPEED PORT INTERMEDIATE THE ENDS OF SAID CYLINDER ELEMENT AND ADAPTED TO BE COVERED AND UNCOVERED BY THE PISTON ELEMENT AS THE MOVABLE ELEMENT OF THE ACTUATOR IS RECIPROCATED TO CHANGE THE SPEED OF MOVEMENT OF THE MOVABLE ELEMENT, SAID PISTON ELEMENT HAVING A VALVING PORTION FOR COVERING AND UNCOVERING SAID PORT ON RECIPROCATION OF SAID MOVABLE ELEMENT AND COMPRISING A CYLINDRICALLY CURVED LAND CLOSELY FITTING SAID CYLINDER ELEMENT FOR LESS THAN 360* AND HAVING AN OBLIQUE CONTROL EDGE WHICH IS GENERATED BY MOVING ABOUT AND LENGTHWISE OF SAID PISTON ELEMENT, AND MEANS SUPPORTING SAID VALVING PORTION AND CYLINDER ELEMENT FOR RELATIVE ANGULAR ROTATION ABOUT THE AXIS OF THE ACTUATOR TO POSITION A PARTICULAR PORTION OF SAID CONTROL EDGE TO MOVE OVER SAID PORT UPON RELATIVE RECIPROCATION OF THE PISTON ELEMENT AND CYLINDER ELEMENT TO DETERMINE THE RELATIVE AXIAL POSITION OF SAID ELEMENTS AT WHICH SAID PORT IS COVERED AND UNCOVERED.
Claim 2
Dependent Claim
202 words
IN A DRIVE SYSTEM FOR A SLIDE MEMBER, AN ACTUATOR COMPRISING A CYLINDER ELEMENT AND COOPERATING CYLINDRICAL PISTON ELEMENT ONE OF SAID ELEMENTS BEING MOVABLE AND CONNECTED TO SAID SLIDE MEMBER TO RECIPROCATE THE LATTER UPON RECIPROCATION OF THE MOVABLE ELEMENT OF THE ACTUATOR, CONTROL MEANS FOR SAID ACTUATOR INCLUDING A CHANGESPEED PORT INTERMEDIATE THE ENDS OF SAID CYLINDER ELEMENT AND ADAPTED TO BE COVERED AND UNCOVERED BY THE PISTON ELEMENT AS THE MOVABLE ELEMENT OF THE ACTUATOR IS RECIPROCATED TO CHANGE THE SPEED OF MOVEMENT OF THE MOVABLE ELEMENT, SAID PISTON ELEMENT HAVING A VALVING PORTION FOR COVERING AND UNCOVERING SAID PORT ON RECIPROCATION OF SAID MOVABLE ELEMENT AND COMPRISING A CYLINDRICALLY CURVED LAND CLOSELY FITTING SAID CYLINDER ELEMENT FOR LESS THAN 360* AND HAVING AN OBLIQUE CONTROL EDGE WHICH IS GENERATED BY MOVING ABOUT AND LENGTHWISE OF SAID PISTON ELEMENT, AND MEANS SUPPORTING SAID VALVING PORTION AND CYLINDER ELEMENT FOR RELATIVE ANGULAR ROTATION ABOUT THE AXIS OF THE ACTUATOR TO POSITION A PARTICULAR PORTION OF SAID CONTROL EDGE TO MOVE OVER SAID PORT UPON RELATIVE RECIPROCATION OF THE PISTON ELEMENT AND CYLINDER ELEMENT TO DETERMINE THE RELATIVE AXIAL POSITION OF SAID ELEMENTS AT WHICH SAID PORT IS COVERED AND UNCOVERED.
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) | 1967-02-03 | 1967-08-05 | 1968-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-02-03 | 1971-08-05 | 1972-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-02-03 | 1975-08-05 | 1976-02-04 | $7700.00 | Window Closed / Lapsed |