Patent US3189704A successfully refreshed from Google Patents.
US3189704A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pneumatic switch actuator
Assignee: Robertshaw Controls Co
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Filing: 1961-11-10
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Granted: 1965-06-15
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Expires: 1981-11-10
Abstract
No abstract record available.
Inventors
- 👤 Roland D Beck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:16
CPC Classifications
H; H01; H01H; H01H35/00; H01H35/24; H01H35/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
171 words
A PNEUMATIC ACTUATOR FOR A SWITCH MECHANISM COMPRISING A SWITCH CASING, SWITCHING DEVICE IN SAID CASING, MEANS DEFINING AN OPENING IN SAID CASING, A PERIPHERAL RECESS SURROUNDING THE OPENING, A CUP-SHAPED FLEXIBLE MEMBER HAVING A BOTTOM WALL ENGAGING SAID SWITCHING DEVICE FOR OPERATING THE SAME AND HAVING A RIM PORTION DISPOSED IN SAID RECESS, AN INTERNAL GROOVE ADJACENT SAID RIM PORTION, A TUBULAR ELEMENT HAVING A FLANGE PORTION DISPOSED IN SAID GROOVE AND A CONNECTING PORTION EXTENDING THROUGH THE OPENING, FASTENING MEANS ON SAID CONNECTING PORTION ENGAGING SAID CASING WHEREBY SAID FLANGE PORTION SEALS SAID RIM PORTION AGAINST SAID RECESS TO DEFINE A PNEUMATIC CHAMBER IN SAID FLEXIBLE MEMBER, COIL SPRING MEANS MOUNTED BETWEEN SAID TUBULAR ELEMENT AND SAID BOTTOM WALL TO MAINTAIN SAID BOTTOM WALL IN BIASED ENGAGEMENT WITH SAID SWITCHING DEVICE, AND MEANS ON SAID TUBULAR ELEMENT FOR SUBJECTING THE PNEUMATIC CHAMBER TO A PNEUMATIC CONDITION, SAID CUP-SHAPED FLEXIBLE MEMBER BEING FLEXED IN RESPONSE TO THE PNEUMATIC CONDITION WHEREBY SAID BOTTOM WALL IS MOVED TO ACTUATE SAID SWITCHING DEVICE.
Claim 2
Dependent Claim
171 words
A PNEUMATIC ACTUATOR FOR A SWITCH MECHANISM COMPRISING A SWITCH CASING, SWITCHING DEVICE IN SAID CASING, MEANS DEFINING AN OPENING IN SAID CASING, A PERIPHERAL RECESS SURROUNDING THE OPENING, A CUP-SHAPED FLEXIBLE MEMBER HAVING A BOTTOM WALL ENGAGING SAID SWITCHING DEVICE FOR OPERATING THE SAME AND HAVING A RIM PORTION DISPOSED IN SAID RECESS, AN INTERNAL GROOVE ADJACENT SAID RIM PORTION, A TUBULAR ELEMENT HAVING A FLANGE PORTION DISPOSED IN SAID GROOVE AND A CONNECTING PORTION EXTENDING THROUGH THE OPENING, FASTENING MEANS ON SAID CONNECTING PORTION ENGAGING SAID CASING WHEREBY SAID FLANGE PORTION SEALS SAID RIM PORTION AGAINST SAID RECESS TO DEFINE A PNEUMATIC CHAMBER IN SAID FLEXIBLE MEMBER, COIL SPRING MEANS MOUNTED BETWEEN SAID TUBULAR ELEMENT AND SAID BOTTOM WALL TO MAINTAIN SAID BOTTOM WALL IN BIASED ENGAGEMENT WITH SAID SWITCHING DEVICE, AND MEANS ON SAID TUBULAR ELEMENT FOR SUBJECTING THE PNEUMATIC CHAMBER TO A PNEUMATIC CONDITION, SAID CUP-SHAPED FLEXIBLE MEMBER BEING FLEXED IN RESPONSE TO THE PNEUMATIC CONDITION WHEREBY SAID BOTTOM WALL IS MOVED TO ACTUATE SAID SWITCHING DEVICE.
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) | 1968-06-14 | 1968-12-14 | 1969-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-14 | 1972-12-14 | 1973-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-14 | 1976-12-14 | 1977-06-15 | $7700.00 | Window Closed / Lapsed |