US3133501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air control for hydropneumatic system
Assignee: Brady Air Controls Inc
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Filing: 1961-10-23
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Granted: 1964-05-19
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Expires: 1981-10-23
Abstract
No abstract record available.
Inventors
- 👤 Richard F Brady
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:56
CPC Classifications
F; F04; F04D; F04D13/00; F04D13/16; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2931; Y10T137/3115; Y10T137/3127; Y10T137/313; Y10T137/3133
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
IN A WATER SUPPLY SYSTEM, A TANK, A PUMP FOR SUPPLYING WATER TO SAID TANK, MEANS CONTROLLED BY THE PRESSURE IN SAID TANK FOR STARTING AND STOPPING SAID PUMP, A FLUID TIGHT HOUSING CONNECTED BETWEEN SAID TANK AND SAID PUMP, A SENSING TUBE CONNECTED TO SAID TANK AT THE DESIRED WATER LEVEL, A CHECK VALVE MOUNTED IN SAID HOUSING AND OPENING TO ATMOSPHERE, SAID HOUSING HAVING A VENTURI PASSAGE THERETHROUGH COMMUNICATING BETWEEN SAID PUMP AND SAID TANK, AND A SECOND PASSAGE THERETHROUGH COMMUNICATING BETWEEN SAID VENTURI PASSAGE AND SAID CHECK VALVE, AND VALVE MEANS COUPLED TO SAID SENSING TUBE AND SAID VENTURI PASSAGE FOR CONTROLLING SAID CHECK VALVE TO ADMIT AIR TO SAID VENTURI PASSAGE WHEN TANK WATER IS ABOVE THE DESIRED LEVEL AND TO SHUT OFF SAID CHECK VALVE WHEN TANK WATER IS BELOW THE DESIRED LEVEL.
Claim 2
Dependent Claim
138 words
IN A WATER SUPPLY SYSTEM, A TANK, A PUMP FOR SUPPLYING WATER TO SAID TANK, MEANS CONTROLLED BY THE PRESSURE IN SAID TANK FOR STARTING AND STOPPING SAID PUMP, A FLUID TIGHT HOUSING CONNECTED BETWEEN SAID TANK AND SAID PUMP, A SENSING TUBE CONNECTED TO SAID TANK AT THE DESIRED WATER LEVEL, A CHECK VALVE MOUNTED IN SAID HOUSING AND OPENING TO ATMOSPHERE, SAID HOUSING HAVING A VENTURI PASSAGE THERETHROUGH COMMUNICATING BETWEEN SAID PUMP AND SAID TANK, AND A SECOND PASSAGE THERETHROUGH COMMUNICATING BETWEEN SAID VENTURI PASSAGE AND SAID CHECK VALVE, AND VALVE MEANS COUPLED TO SAID SENSING TUBE AND SAID VENTURI PASSAGE FOR CONTROLLING SAID CHECK VALVE TO ADMIT AIR TO SAID VENTURI PASSAGE WHEN TANK WATER IS ABOVE THE DESIRED LEVEL AND TO SHUT OFF SAID CHECK VALVE WHEN TANK WATER IS BELOW THE DESIRED LEVEL.
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) | 1967-05-19 | 1967-11-18 | 1968-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-19 | 1971-11-18 | 1972-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-19 | 1975-11-18 | 1976-05-19 | $7700.00 | Window Closed / Lapsed |