US3293992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid actuator
Assignee: AW Cash Co
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Filing: 1964-08-25
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Granted: 1966-12-27
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Expires: 1984-08-25
Abstract
No abstract record available.
Inventors
- 👤 Hans D Baumann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:51
CPC Classifications
G; G05; G05D; G05D16/00; G05D16/14; G05D16/16; G05D16/163; F; F15; F15B; F15B15/00; F15B15/08; F15B15/10; F16; F16K; F16K31/00; F16K31/12; F16K31/122; F16K31/1221; G05D16/04; G05D16/06; G05D16/063; G05D16/0644; G05D16/0663
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
210 words
AN ACTUATOR, COMPRISING (A) A HOUSING INCLUDING A CYLINDRICAL BORE, (B) A PISTON SLIDABLE IN THE BORE AT ONE END THEREOF, (C) A PISTON ROD EXTENDING FROM THE PISTON TO THE EXTERIOR OF THE HOUSING FOR THE ACTUATING FUNCTION, (D) A DIAPHRAGM EXTENDING ACROSS THE BORE AT THE OTHER END AND ADAPTED TO HAVE A CONTROL SIGNAL APPLIED TO IT, (E) A SPRING EXTENDING BETWEEN THE PISTON AND THE DIAPHRAGM, (F) A PILOT VALVE OPERATED BY THE DIAPGRAGM HAVING AN INPUT TO WHICH PRESSURE OPERATING FLUID IS CONNECTED, (G) A CONDUIT CONNECTING THE OUTPUT OF THE PILOT VALVE TO THE PISTON FOR THE OPERATION THEREOF, AND (H) A SECOND SPRING EXTENDING BETWEEN THE PISTON AND THE HOUSING AT THE OTHER END OF THE BORE, WHEREIN THE PISTON IS PROVIDED WITH A SEAL CONSISTING OF A DIAPHRAGM OF RUBBER-LIKE MATERIAL WHOSE PERIPHERY IS FASTENED RELATIVE TO THE SURFACE OF THE BORE ADJACENT ONE END OF THE PISTON, WHOSE CENTRAL PORTION IS FASTENED TO THE UNDERSIDE OF THE PISTON AT THE SAID ONE END, AND WHOSE INTERMEDIATE PORTION IS NORMALLY DOUBLED BETWEEN THE SURFACE OF THE PISTON AND THE SURFACE OF THE BORE, THE PISTON BEING PROVIDED AT ITS OTHER END WITH A SEAL WHICH SLIDES ALONG THE SURFACE OF THE BORE.
Claim 2
Dependent Claim
210 words
AN ACTUATOR, COMPRISING (A) A HOUSING INCLUDING A CYLINDRICAL BORE, (B) A PISTON SLIDABLE IN THE BORE AT ONE END THEREOF, (C) A PISTON ROD EXTENDING FROM THE PISTON TO THE EXTERIOR OF THE HOUSING FOR THE ACTUATING FUNCTION, (D) A DIAPHRAGM EXTENDING ACROSS THE BORE AT THE OTHER END AND ADAPTED TO HAVE A CONTROL SIGNAL APPLIED TO IT, (E) A SPRING EXTENDING BETWEEN THE PISTON AND THE DIAPHRAGM, (F) A PILOT VALVE OPERATED BY THE DIAPGRAGM HAVING AN INPUT TO WHICH PRESSURE OPERATING FLUID IS CONNECTED, (G) A CONDUIT CONNECTING THE OUTPUT OF THE PILOT VALVE TO THE PISTON FOR THE OPERATION THEREOF, AND (H) A SECOND SPRING EXTENDING BETWEEN THE PISTON AND THE HOUSING AT THE OTHER END OF THE BORE, WHEREIN THE PISTON IS PROVIDED WITH A SEAL CONSISTING OF A DIAPHRAGM OF RUBBER-LIKE MATERIAL WHOSE PERIPHERY IS FASTENED RELATIVE TO THE SURFACE OF THE BORE ADJACENT ONE END OF THE PISTON, WHOSE CENTRAL PORTION IS FASTENED TO THE UNDERSIDE OF THE PISTON AT THE SAID ONE END, AND WHOSE INTERMEDIATE PORTION IS NORMALLY DOUBLED BETWEEN THE SURFACE OF THE PISTON AND THE SURFACE OF THE BORE, THE PISTON BEING PROVIDED AT ITS OTHER END WITH A SEAL WHICH SLIDES ALONG THE SURFACE OF THE BORE.
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) | 1969-12-26 | 1970-06-27 | 1970-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-26 | 1974-06-27 | 1974-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-26 | 1978-06-27 | 1978-12-27 | $7700.00 | Window Closed / Lapsed |