Patent US3135164A successfully refreshed from Google Patents.
US3135164A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Servo mechanism
Assignee: Ambac International Corp
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Filing: 1959-11-16
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Granted: 1964-06-02
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Expires: 1979-11-16
Abstract
No abstract record available.
Inventors
- 👤 Dominick P Scotto
- 👤 Daniel J Mager
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:07
CPC Classifications
F; F15; F15B; F15B11/00; F15B11/08; F15B11/12; F15B11/121; F15B15/00; F15B15/20; F15B15/24; F15B9/00; F15B9/02; F15B9/08; F15B9/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
IN A DEVICE OF THE CHARACTER DESCRIBED, A SLEEVE, A CYLINDER MOUNTED WITHIN SAID SLEEVE, SAID SLEEVE AND CYLINDER BEING MOUNTED FOR RELATIVE ROTATIONAL MOVEMENT, MEANS FOR ROTATING SAID SLEEVE WITH RESPECT TO SAID CYLINDER, A PISTON WITHIN SAID CYLINDER, MEANS FOR APPLYING FLUID PRESSURE ON ONE SIDE OF SAID PISTON, MEANS APPLYING PRESSURE ON SAID PISTON OPPOSING SAID FLUID PRESSURE, SAID SLEEVE AND SAID CYLINDER EACH HAVING INTERSECTING PASSAGEWAYS WHEREBY ROTATION OF SAID SLEEVE WILL EFFECT LONGITUDINAL MOTION OF SAID PISTON TO THE POSITION WHERE THE PASSAGEWAYS INTERSECT, TORSIONAL SPRING MEANS CONNECTED TO SAID SLEEVE AND TO SAID CYLINDER AND ADAPTED TO BE STRESSED UPON ROTATION OF SAID SLEEVE, SAID TORSIONAL SPRING MEANS RETURNING SAID SLEEVE TO A PREDETERMINED POSITION UPON DEACTIVATION OF SAID ROTATING MEANS.
Claim 2
Dependent Claim
127 words
IN A DEVICE OF THE CHARACTER DESCRIBED, A SLEEVE, A CYLINDER MOUNTED WITHIN SAID SLEEVE, SAID SLEEVE AND CYLINDER BEING MOUNTED FOR RELATIVE ROTATIONAL MOVEMENT, MEANS FOR ROTATING SAID SLEEVE WITH RESPECT TO SAID CYLINDER, A PISTON WITHIN SAID CYLINDER, MEANS FOR APPLYING FLUID PRESSURE ON ONE SIDE OF SAID PISTON, MEANS APPLYING PRESSURE ON SAID PISTON OPPOSING SAID FLUID PRESSURE, SAID SLEEVE AND SAID CYLINDER EACH HAVING INTERSECTING PASSAGEWAYS WHEREBY ROTATION OF SAID SLEEVE WILL EFFECT LONGITUDINAL MOTION OF SAID PISTON TO THE POSITION WHERE THE PASSAGEWAYS INTERSECT, TORSIONAL SPRING MEANS CONNECTED TO SAID SLEEVE AND TO SAID CYLINDER AND ADAPTED TO BE STRESSED UPON ROTATION OF SAID SLEEVE, SAID TORSIONAL SPRING MEANS RETURNING SAID SLEEVE TO A PREDETERMINED POSITION UPON DEACTIVATION OF SAID ROTATING MEANS.
References Cited (Backward Citations)
US2187513A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-02 | 1967-12-02 | 1968-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-02 | 1971-12-02 | 1972-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-02 | 1975-12-02 | 1976-06-02 | $7700.00 | Window Closed / Lapsed |