US3154652A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for protecting diaphragm controlled switches against excessive pressure
Assignee: Individual
•
Filing: 1961-03-06
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Granted: 1964-10-27
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Expires: 1981-03-06
Abstract
No abstract record available.
Inventors
- 👤 Morris A Gilman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:26
CPC Classifications
H; H01; H01H; H01H35/00; H01H35/24; H01H35/26; H01H35/2685
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
A LIQUID LEVEL CONTROL COMPRISING A SWITCH HOUSING MOUNTED IN A LOCATION IN WHICH IT IS SUBJECTED TO WATER OF VARYING DEPTH INCLUDING A DEPTH SUFFICIENT TO COMPLETELY IMMERSE SAID HOUSING, A SWITCH ENCLOSED IN SAID HOUSING, PRESSURE SENSITIVE MEANS IN SAID HOUSING FOR CLOSING SAID SWITCH AT A PREDETERMINED PRESSURE, ONE SURFACE OF SAID PRESSURE SENSITIVE MEANS BEING EXPOSED TO SAID WATER, AND MEAN AUTOMATICALLY FORMING AN AIR BUFFER BETWEEN SAID WATER AND THE OPPOSITE SURFACE OF SAID PRESSURE SENSITIVE MEANS WHEN SAID HOUSING IS COMPLETELY IMMERSED IN SAID WATER TO COUNTERACT ANY PRESSURE AGAINST SAID PRESSURE SENSITIVE MEANS IN EXCESS OF SAID PREDETERMINED PRESSURE.
Claim 2
Dependent Claim
106 words
A LIQUID LEVEL CONTROL COMPRISING A SWITCH HOUSING MOUNTED IN A LOCATION IN WHICH IT IS SUBJECTED TO WATER OF VARYING DEPTH INCLUDING A DEPTH SUFFICIENT TO COMPLETELY IMMERSE SAID HOUSING, A SWITCH ENCLOSED IN SAID HOUSING, PRESSURE SENSITIVE MEANS IN SAID HOUSING FOR CLOSING SAID SWITCH AT A PREDETERMINED PRESSURE, ONE SURFACE OF SAID PRESSURE SENSITIVE MEANS BEING EXPOSED TO SAID WATER, AND MEAN AUTOMATICALLY FORMING AN AIR BUFFER BETWEEN SAID WATER AND THE OPPOSITE SURFACE OF SAID PRESSURE SENSITIVE MEANS WHEN SAID HOUSING IS COMPLETELY IMMERSED IN SAID WATER TO COUNTERACT ANY PRESSURE AGAINST SAID PRESSURE SENSITIVE MEANS IN EXCESS OF SAID PREDETERMINED PRESSURE.
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) | 1967-10-27 | 1968-04-27 | 1968-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-27 | 1972-04-27 | 1972-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-27 | 1976-04-27 | 1976-10-27 | $7700.00 | Window Closed / Lapsed |