Patent US1460260A successfully refreshed from Google Patents.
US3333597A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic primer valve for drain traps
Assignee: Individual
•
Filing: 1964-11-05
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Granted: 1967-08-01
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Expires: 1984-11-05
Abstract
No abstract record available.
Inventors
- 👤 Richard N Sullivan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:19
CPC Classifications
E; E03; E03C; E03C1/00; E03C1/12; E03C1/28; E03C1/294; E03C1/296; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2544; Y10T137/2931; Y10T137/3115; Y10T137/3118; Y10T137/4456; Y10T137/4463; Y10T137/4516
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
A PRIMER VALVE COMPRISING A SUPPLY CHAMBER AND A DISPENSING CHAMBER SEPARATED BY A FLEXIBLE DIAPHRAGM, A WATER INLET CONNECTION IN SAID SUPPLY CHAMBER, AN OUTLET IN SAID DISPENSING CHAMBER, A VALVE OPERABLE BY PRESSURE ON SAID DIAPHRAGM IN SAID SUPPLY CHAMBER TO CLOSE SAID OUTLET, AN OPENING BETWEEN SAID TWO CHAMBERS, A CHECK VALVE IN SAID OPENING PERMITTING FLOW FROM SAID SUPPLY CHAMBER TO SAID DISPENSING CHAMBER AND PREVENTING BACK FLOW, AND RESILIENT MEANS ARRANGED TO BE COMPRESSED BY THE WATER PRESSURE IN SAID DISPENSING CHAMBER AND MAINTIAN PRESSURE IN SAID DISPENSING CHAMBER TO FLEX SAID DIAPHRAGM AND OPEN SAID OUTLET VALVE WHENEVER THE PRESSURE IS REDUCED IN SAID SUPPLY CHAMBER.
Claim 2
Dependent Claim
112 words
A PRIMER VALVE COMPRISING A SUPPLY CHAMBER AND A DISPENSING CHAMBER SEPARATED BY A FLEXIBLE DIAPHRAGM, A WATER INLET CONNECTION IN SAID SUPPLY CHAMBER, AN OUTLET IN SAID DISPENSING CHAMBER, A VALVE OPERABLE BY PRESSURE ON SAID DIAPHRAGM IN SAID SUPPLY CHAMBER TO CLOSE SAID OUTLET, AN OPENING BETWEEN SAID TWO CHAMBERS, A CHECK VALVE IN SAID OPENING PERMITTING FLOW FROM SAID SUPPLY CHAMBER TO SAID DISPENSING CHAMBER AND PREVENTING BACK FLOW, AND RESILIENT MEANS ARRANGED TO BE COMPRESSED BY THE WATER PRESSURE IN SAID DISPENSING CHAMBER AND MAINTIAN PRESSURE IN SAID DISPENSING CHAMBER TO FLEX SAID DIAPHRAGM AND OPEN SAID OUTLET VALVE WHENEVER THE PRESSURE IS REDUCED IN SAID SUPPLY CHAMBER.
References Cited (Backward Citations)
US2233818A
Cited
US2938530A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-07-31 | 1971-01-30 | 1971-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-31 | 1975-01-30 | 1975-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-31 | 1979-01-30 | 1979-08-01 | $7700.00 | Window Closed / Lapsed |