Patent US331328A successfully refreshed from Google Patents.
Patent US3235683A successfully refreshed from Google Patents.
US3235683A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air compressor control mechanism
Assignee: Individual
•
Filing: 1961-04-12
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Granted: 1966-02-15
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Expires: 1981-04-12
Abstract
No abstract record available.
Inventors
- 👤 Beeman Lyle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:25
CPC Classifications
H; H01; H01H; H01H35/00; H01H35/24; H01H35/26; H01H35/2607; H01H35/2614; H01H35/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
IN AN AIR COMPRESSOR SWITCH, THE COMBINATION COMPRISING A HOUSING, SAID HOUSING HAVING A WALL WITH AN OPENING THEREIN, A DIAPHRAGM TYPE PRESSURE OPERATED SWITCH POSITIONED WITHIN SAID HOUSING WITH A DIAPHRAGM THEREOF ADJACENT SAID OPENING, SAID SWITCH BEING OPENED WHEN THE PRESSURE THEREON EXCEEDS A PREDETERMINED LIMIT AND BEING CLOSED WHEN THE PRESSURE THEREON FALLS BELOW A PREDETERMINED LIMIT, A MAGNETIC COIL ELECTRICALLY CONNECTED TO SAID SWITCH AN ENERGIZED BY THE CLOSING OF SAID SWITCH, SAID COIL HAVING A MOVABLE ARMATURE, AN UNLOADER VALVE MOUNTED ON SAID HOUSING AND HAVING AN INLET ADAPTED TO BE CONNECTED TO A HEAD END OF CYLINDERS OF A COMPRESSOR AND AN OUTLET CONNECTED TO THE ATMOSPHERE, MEANS IN SAID VALVE FOR OPENING AND CLOSING SAID VALVE, AND MEANS MECHANICALLY CONNECTING SAID LAST-MENTIONED MEANS TO SAID ARMATURE SUCH THAT SAID VALVE IS
Claim 2
Dependent Claim
138 words
IN AN AIR COMPRESSOR SWITCH, THE COMBINATION COMPRISING A HOUSING, SAID HOUSING HAVING A WALL WITH AN OPENING THEREIN, A DIAPHRAGM TYPE PRESSURE OPERATED SWITCH POSITIONED WITHIN SAID HOUSING WITH A DIAPHRAGM THEREOF ADJACENT SAID OPENING, SAID SWITCH BEING OPENED WHEN THE PRESSURE THEREON EXCEEDS A PREDETERMINED LIMIT AND BEING CLOSED WHEN THE PRESSURE THEREON FALLS BELOW A PREDETERMINED LIMIT, A MAGNETIC COIL ELECTRICALLY CONNECTED TO SAID SWITCH AN ENERGIZED BY THE CLOSING OF SAID SWITCH, SAID COIL HAVING A MOVABLE ARMATURE, AN UNLOADER VALVE MOUNTED ON SAID HOUSING AND HAVING AN INLET ADAPTED TO BE CONNECTED TO A HEAD END OF CYLINDERS OF A COMPRESSOR AND AN OUTLET CONNECTED TO THE ATMOSPHERE, MEANS IN SAID VALVE FOR OPENING AND CLOSING SAID VALVE, AND MEANS MECHANICALLY CONNECTING SAID LAST-MENTIONED MEANS TO SAID ARMATURE SUCH THAT SAID VALVE IS
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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) | 1969-02-14 | 1969-08-16 | 1970-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-14 | 1973-08-16 | 1974-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-14 | 1977-08-16 | 1978-02-15 | $7700.00 | Window Closed / Lapsed |