Patent US2219694A successfully refreshed from Google Patents.
Patent US3402732A successfully refreshed from Google Patents.
US3402732A
Expired / Lapsed
US
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Liquid level and pressure control system with precheck means for tanks
Assignee: Schulz Tool and Manufacturing Co
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Filing: 1966-06-07
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Granted: 1968-09-24
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Expires: 1986-06-07
Abstract
No abstract record available.
Inventors
- 👤 Artson P Hardison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:52
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/12; F16K31/18; F16K31/20; F16K31/24; F16K31/26; Y; Y10; Y10T; Y10T137/00; Y10T137/7287; Y10T137/7297; Y10T137/73; Y10T137/7358; Y10T137/7368; Y10T137/7371; Y10T137/7374
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
162 words
IN A PRESSURE SENSITIVE VALVE HAVING A PAYCHECK MEANS, (A) A VALVE BODY; (B) A CHAMBER IN SAID BODY; (C) A DIAPHRAGM DIVIDING SAID CHAMBER INTO TWO PARTS; (D) A VALVE HAVING A STEM EXTENDING THROUGH ONE OF SAID PARTS AND BEING CONNECTED TO MOVE WITH SAID DIAPHRAGM, (E) SAID ONE PART BEING CLOSED. (F) SAID DIAPHRAGM BEING SPRING BIASED TO HOLD SAID VALVE IN AN OPEN POSITION; (G) FIRST PASSAGE TO SAID ONE PART TO COMMUNICATE PRESSURE MEANS TO BE SENSED TO SAID DIAPHRAGM WHEREBY A PREDETERMINED PRESSURE WILL ACTUATE SAID DIAPHRAGM TO MOVE SAID VALVE TO A CLOSED POSITION; (H) THE IMPROVEMENT COMPRISING PRECHECK MEANS IN COMMUNICATION WITH SAID FIRST PASSAGE MEANS TO PRECHECK THE OPERATION OF SAID DIAPHRAGM AND VALVE, SAID PRECHECK MEANS INCLUDING; (I) SAID FIRST PASSAGE MEANS HAVING A LIQUID PRESSURE SOURCE TO SUPPLY LIQUID UNDER PRESSURE TO SAID ONE PART THROUGH SAID FIRST PASSAGE MEANS TO ACTUATE SAID DIAPHRAGM AND VALVE AT SAID PREDETERMINED PRESSURE; AND
Claim 2
Dependent Claim
162 words
IN A PRESSURE SENSITIVE VALVE HAVING A PAYCHECK MEANS, (A) A VALVE BODY; (B) A CHAMBER IN SAID BODY; (C) A DIAPHRAGM DIVIDING SAID CHAMBER INTO TWO PARTS; (D) A VALVE HAVING A STEM EXTENDING THROUGH ONE OF SAID PARTS AND BEING CONNECTED TO MOVE WITH SAID DIAPHRAGM, (E) SAID ONE PART BEING CLOSED. (F) SAID DIAPHRAGM BEING SPRING BIASED TO HOLD SAID VALVE IN AN OPEN POSITION; (G) FIRST PASSAGE TO SAID ONE PART TO COMMUNICATE PRESSURE MEANS TO BE SENSED TO SAID DIAPHRAGM WHEREBY A PREDETERMINED PRESSURE WILL ACTUATE SAID DIAPHRAGM TO MOVE SAID VALVE TO A CLOSED POSITION; (H) THE IMPROVEMENT COMPRISING PRECHECK MEANS IN COMMUNICATION WITH SAID FIRST PASSAGE MEANS TO PRECHECK THE OPERATION OF SAID DIAPHRAGM AND VALVE, SAID PRECHECK MEANS INCLUDING; (I) SAID FIRST PASSAGE MEANS HAVING A LIQUID PRESSURE SOURCE TO SUPPLY LIQUID UNDER PRESSURE TO SAID ONE PART THROUGH SAID FIRST PASSAGE MEANS TO ACTUATE SAID DIAPHRAGM AND VALVE AT SAID PREDETERMINED PRESSURE; AND
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) | 1971-09-24 | 1972-03-25 | 1972-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-24 | 1976-03-25 | 1976-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-24 | 1980-03-25 | 1980-09-24 | $7700.00 | Window Closed / Lapsed |