US3572035A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Friction compensator
Assignee: AT&T Inc
•
Filing: 1969-04-01
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Granted: 1971-03-23
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Expires: 1989-04-01
Abstract
Abstract A pressure vessel having an actuating system for advancing and retracting an element, e.g. a piston, slidably into and out of the vessel is provided with means responsive to frictional forces generated by the sliding passage of the element into and out of the vessel to generate a compensating force for opposing the effect of the frictional force on the actuating system.
Inventors
- 👤 John Edward Beroset
- 👤 Francis Joseph Fuchs Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:50
CPC Classifications
F; F15; F15B; F15B21/00; F15B3/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
96 words
In an apparatus for pressurizing fluid including: a working chamber for containing working fluid, a support chamber surrounding said working chamber for receiving support fluid, means for pressurizing said working fluid, and means for pressurizing said support fluid, said working fluid and said support fluid having a predetermined pressure-level relationship, the improvement comprising: sensing means for sensing any variation in said predetermined pressure level relationship; and compensating means responsive to said sensing means for exerting compensating control on said means for pressurizing said support fluid to restore said predetermined pressure level relationship upon the alteration thereof.
Claim 2
Dependent Claim
96 words
In an apparatus for pressurizing fluid including: a working chamber for containing working fluid, a support chamber surrounding said working chamber for receiving support fluid, means for pressurizing said working fluid, and means for pressurizing said support fluid, said working fluid and said support fluid having a predetermined pressure-level relationship, the improvement comprising: sensing means for sensing any variation in said predetermined pressure level relationship; and compensating means responsive to said sensing means for exerting compensating control on said means for pressurizing said support fluid to restore said predetermined pressure level relationship upon the alteration thereof.
Claim 3
Dependent Claim
14 words
The improvement according to claim 1 wherein said sensing means comprises a fluid motor.
Claim 4
Dependent Claim
14 words
The improvement according to claim 1 wherein said sensing means comprises a load cell.
Claim 5
Dependent Claim
167 words
In fluid pressurization apparatus including: a pressure vessel comprising a working fluid chamber for containing working fluid, and a support fluid chamber surrounding said working fluid chamber for containing support fluid; a fluid motor including a piston extending into said working fluid chamber for pressurizing said working fluid; a suppoRt fluid motor for pressurizing said support fluid in a predetermined pressure level relationship with respect to said working fluid; and sealing means mounted in said pressure vessel and in sliding engagement with said piston for preventing leakage of said working fluid from said working fluid chamber, the improvement comprising: sensing means for sensing frictional forces generated by the sliding engagement of said sealing means with said piston, said frictional forces tending to alter said predetermined pressure level relationship; and a compensator fluid motor responsive to said sensing means for exerting controlling force on said support fluid motor to cause said support fluid motor to vary the pressurization of said fluid to restore said predetermined pressure level relationship.
Claim 6
Dependent Claim
167 words
In fluid pressurization apparatus including: a pressure vessel comprising a working fluid chamber for containing working fluid, and a support fluid chamber surrounding said working fluid chamber for containing support fluid; a fluid motor including a piston extending into said working fluid chamber for pressurizing said working fluid; a suppoRt fluid motor for pressurizing said support fluid in a predetermined pressure level relationship with respect to said working fluid; and sealing means mounted in said pressure vessel and in sliding engagement with said piston for preventing leakage of said working fluid from said working fluid chamber, the improvement comprising: sensing means for sensing frictional forces generated by the sliding engagement of said sealing means with said piston, said frictional forces tending to alter said predetermined pressure level relationship; and a compensator fluid motor responsive to said sensing means for exerting controlling force on said support fluid motor to cause said support fluid motor to vary the pressurization of said fluid to restore said predetermined pressure level relationship.
Claim 7
Dependent Claim
14 words
The improvement according to claim 4 wherein said sensing means comprises a fluid motor.
Claim 8
Dependent Claim
70 words
The improvement according to claim 4 wherein said sensing means comprises a rigidly mounted cylinder surrounding and loosely receiving said pressure vessel and defining in cooperation with said pressure vessel, and associated seals, a plurality of fluid chambers for receiving fluids which fluids are respectively pressurized by movement of said pressure vessel in response to said frictional forces generated by said sliding engagement of said sealing means with said piston.
Claim 9
Dependent Claim
14 words
The improvement according to claim 4 wherein said sensing means comprises a load cell.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-22 | 1974-09-21 | 1975-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-22 | 1978-09-21 | 1979-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-22 | 1982-09-21 | 1983-03-23 | $7700.00 | Window Closed / Lapsed |