Patent US3216623A successfully refreshed from Google Patents.
US3216623A
Expired / Lapsed
US
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Apparatus for controlling fluid flow
Assignee: Individual
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Filing: 1963-03-19
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Granted: 1965-11-09
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Expires: 1983-03-19
Abstract
No abstract record available.
Inventors
- 👤 John F Grundmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:19
CPC Classifications
A; A47; A47J; A47J31/00; A47J31/44; A47J31/52
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
182 words
HOT WATER DISPENSING APPARATUS COMPRISING: A TANK; AN INVERTED U-SHAPED TUBE HAVING DOWNWARDLY EXTENDING LEGS CONNECTED TO SAID TANK AT DIFFERENT CORRESPONDING POSITIONS; DISPENSING MEANS CONNECTED WITH SAID TUBE AT THE TOP THEREOF BETWEEN SAID LEGS; A FIRST CHECK VALVE IN ONE OF SAID LEGS, SAID FIRST CHECK VALVE BEING ADAPTED TO CLOSE WHEN THE PRESSURE IN A PORTION OF SAID ONE LEG BETWEEN SAID FIRST CHECK VALVE AND SAID DISPENSING MEANS IS GREATER THAN THAT IN A PORTION OF SAID ONE LEG BETWEEN SAID FIRST CHECK VALVE AND SAID TANK; A SECOND CHECK VALVE IN THE OTHER OF SAID LEGS, SAID SECOND CHECK VALVE BEING ADAPTED TO CLOSE WHEN THE PRESSURE IN SAID OTHER LEG THEREABOVE EXCEEDS THAT IN SAID OTHER LEG THEREBELOW BY A PREDETERMINED AMOUNT; A CYLINDER BETWEEN SAID CHECK VALVES, SAID CYLINDER HAVING A PISTON THEREIN TO MOVE WATER OUTWARDLY OF SAID DISPENSING MEANS; AND MEANS TO MOVE SAID PISTON INTO SAID CYLINDER AT A RATE TO CAUSE PRESSURE IN SAID TUBE BETWEEN SAID CHECK VALVES TO RISE TO A MAGNITUDE SUFFICIENT TO CLOSE BOTH OF SAID VALVES.
Claim 2
Dependent Claim
182 words
HOT WATER DISPENSING APPARATUS COMPRISING: A TANK; AN INVERTED U-SHAPED TUBE HAVING DOWNWARDLY EXTENDING LEGS CONNECTED TO SAID TANK AT DIFFERENT CORRESPONDING POSITIONS; DISPENSING MEANS CONNECTED WITH SAID TUBE AT THE TOP THEREOF BETWEEN SAID LEGS; A FIRST CHECK VALVE IN ONE OF SAID LEGS, SAID FIRST CHECK VALVE BEING ADAPTED TO CLOSE WHEN THE PRESSURE IN A PORTION OF SAID ONE LEG BETWEEN SAID FIRST CHECK VALVE AND SAID DISPENSING MEANS IS GREATER THAN THAT IN A PORTION OF SAID ONE LEG BETWEEN SAID FIRST CHECK VALVE AND SAID TANK; A SECOND CHECK VALVE IN THE OTHER OF SAID LEGS, SAID SECOND CHECK VALVE BEING ADAPTED TO CLOSE WHEN THE PRESSURE IN SAID OTHER LEG THEREABOVE EXCEEDS THAT IN SAID OTHER LEG THEREBELOW BY A PREDETERMINED AMOUNT; A CYLINDER BETWEEN SAID CHECK VALVES, SAID CYLINDER HAVING A PISTON THEREIN TO MOVE WATER OUTWARDLY OF SAID DISPENSING MEANS; AND MEANS TO MOVE SAID PISTON INTO SAID CYLINDER AT A RATE TO CAUSE PRESSURE IN SAID TUBE BETWEEN SAID CHECK VALVES TO RISE TO A MAGNITUDE SUFFICIENT TO CLOSE BOTH OF SAID VALVES.
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) | 1968-11-08 | 1969-05-10 | 1969-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-08 | 1973-05-10 | 1973-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-08 | 1977-05-10 | 1977-11-09 | $7700.00 | Window Closed / Lapsed |