US3166108A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic shutoff device
Assignee: Symington Wayne Corp
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Filing: 1961-07-18
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Granted: 1965-01-19
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Expires: 1981-07-18
Abstract
No abstract record available.
Inventors
- 👤 Hearn Robert Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:49
CPC Classifications
B; B67; B67D; B67D7/00; B67D7/06; B67D7/42; B67D7/44; B67D7/46; B67D7/48
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
220 words
A PRESSURE CONTROL ARRANGEMENT COMPRISING A FLUID DISPENSING NOZZLE, A FLUID SUPPLY SOURCE, A CONDUIT CONNECTING SAID NOZZLE TO SAID FLUID SUPPLY SOURCE, A SUPPLY SHUTOFF VALVE INSTALLED BETWEEN SAID CONDUIT AND SAID FLUID SUPPLY SOURCE, SAID SUPPLY SHUTOFF VALVE BEING OPERABLE TO PROVIDE NORMAL AND MINIMAL FLOW AREAS FOR NORMAL AND MINIMAL FLOW THERETHROUGH, AN AUTOMATIC SHUTOFF VALVE IN SAID NOZZLE WHICH CLOSES SAID NOZZLE WHEN THE FLOW OF FLUID SUPPLIED TO IT IS CUT OFF, A CHECK VALVE IN SAID NOZZLE BETWEEN SAID AUTOMATIC SHUTOFF VALVE AND AND SUPPLY SHUTOFF VALVE FOR PREVENTING PERMATURE CLOSURE OF SAID AUTOMATIC VALVE, A PRESSURE DETECTING CONDUIT CONNECTING SAID AUTOMATIC VALVE TO A PORTION OF SAID NOZZLE BETWEEN SAID CHECK VALVE AND SAID SUPPLY SHUTOFF VALVE FOR ACTUATING SAID AUTOMATIC VALVE TO CLOSE WHEN THE PRESSURE IN SAID PORTION OF SAID NOZZLE DROPS BELOW A PREDETERMINED MINIMUM PRESSURE, RESILIENT MEANS URGING SAID CHECK VALVE TO CLOSE WHEN THE FLUID SUPPLY PRESSURE APPROACHES SAID PREDETERMINED MINIMUM PRESSURE FOR MAINTAINING SAID PREDETERMINED MINIMUM PRESSURE UNDER SAID MINIMAL FLOW RATE CONDITIONS IN SAID PORTION OF SAID NOZZLE, AND A RESTRICTED BYPASS PASSAGEWAY THROUGH SAID CHECK VALVE OF AN AREA WHICH FACILITATES THE MAINTENANCE OF SAID PREDETERMINED MINIMUM PRESSURE IN SAID PORTION OF SAID NOZZLE WHEN THE RATE OF FLUID FLOW IS SUDDENDLY AND APPRECIABLY REDUCED
Claim 2
Dependent Claim
220 words
A PRESSURE CONTROL ARRANGEMENT COMPRISING A FLUID DISPENSING NOZZLE, A FLUID SUPPLY SOURCE, A CONDUIT CONNECTING SAID NOZZLE TO SAID FLUID SUPPLY SOURCE, A SUPPLY SHUTOFF VALVE INSTALLED BETWEEN SAID CONDUIT AND SAID FLUID SUPPLY SOURCE, SAID SUPPLY SHUTOFF VALVE BEING OPERABLE TO PROVIDE NORMAL AND MINIMAL FLOW AREAS FOR NORMAL AND MINIMAL FLOW THERETHROUGH, AN AUTOMATIC SHUTOFF VALVE IN SAID NOZZLE WHICH CLOSES SAID NOZZLE WHEN THE FLOW OF FLUID SUPPLIED TO IT IS CUT OFF, A CHECK VALVE IN SAID NOZZLE BETWEEN SAID AUTOMATIC SHUTOFF VALVE AND AND SUPPLY SHUTOFF VALVE FOR PREVENTING PERMATURE CLOSURE OF SAID AUTOMATIC VALVE, A PRESSURE DETECTING CONDUIT CONNECTING SAID AUTOMATIC VALVE TO A PORTION OF SAID NOZZLE BETWEEN SAID CHECK VALVE AND SAID SUPPLY SHUTOFF VALVE FOR ACTUATING SAID AUTOMATIC VALVE TO CLOSE WHEN THE PRESSURE IN SAID PORTION OF SAID NOZZLE DROPS BELOW A PREDETERMINED MINIMUM PRESSURE, RESILIENT MEANS URGING SAID CHECK VALVE TO CLOSE WHEN THE FLUID SUPPLY PRESSURE APPROACHES SAID PREDETERMINED MINIMUM PRESSURE FOR MAINTAINING SAID PREDETERMINED MINIMUM PRESSURE UNDER SAID MINIMAL FLOW RATE CONDITIONS IN SAID PORTION OF SAID NOZZLE, AND A RESTRICTED BYPASS PASSAGEWAY THROUGH SAID CHECK VALVE OF AN AREA WHICH FACILITATES THE MAINTENANCE OF SAID PREDETERMINED MINIMUM PRESSURE IN SAID PORTION OF SAID NOZZLE WHEN THE RATE OF FLUID FLOW IS SUDDENDLY AND APPRECIABLY REDUCED
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) | 1968-01-19 | 1968-07-20 | 1969-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-01-19 | 1972-07-20 | 1973-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-01-19 | 1976-07-20 | 1977-01-19 | $7700.00 | Window Closed / Lapsed |