Patent US2991772A successfully refreshed from Google Patents.
Patent US3331394A successfully refreshed from Google Patents.
US3331394A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas valve
Assignee: Ingersoll Rand Co
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Filing: 1964-11-23
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Granted: 1967-07-18
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Expires: 1984-11-23
Abstract
No abstract record available.
Inventors
- 👤 Paul R Hefler
- 👤 Thomas J Hefler
- 👤 William C Meyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:38
CPC Classifications
F; F16; F16K; F16K11/00; F16K11/10; F16K11/14; F16K11/16; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87265; Y10T137/8741; Y10T137/87442; Y10T137/877; Y10T137/87788; Y10T137/87812
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
157 words
A GAS FLOW VALVE COMPRISING: (A) A THREE-WAY CONDUIT JUNCTION FOR USE IN A GAS FLOW CONDUIT AND HAVING AN INLET LEG AND TWO OUTLET LEGS; (B) A CENTRAL DAMPER PIVOTED IN THE JUNCTION SUBSTANTIALLY MIDWAY BETWEEN THE TWO OUTLET LEGS WHERE IT CAN PIVOT TO ALTERNATE POSITIONS EXTENDING PARTIALLY ACROSS EACH OF SAID OUTLET LEGS; (C) A SIDE DAMPER PIVOTED IN EACH OF SAID OUTLET LEGS AND MOVABLE BETWEEN A CLOSING POSITION WHEREIN IT COOPERATES WITH SAID CENTRAL DAMPER TO CLOSE ITS OUTLET LEG AND AN OPENING POSITION WHEREIN IT DOES NOT SUBSTANTIALLY OBSTRUCT THE FLOW OF GAS INTO ITS OUTLET LEG; AND (D) ACTUATING MEANS INTERCONNECTING SAID DAMPERS TOGETHER FOR SIMULTANEOUS MOVEMENT BETWEEN ALTERNATE POSITIONS WHEREIN SAID SIDE DAMPERS ARE MOVED ALTERNATELY INTO THEIR CLOSING AND OPENING POSITIONS WITH THE SIDE DAMPER WHICH IS IN ITS CLOSING POSITION COOPERATING WITH THE CENTRAL DAMPER TO CLOSE THAT OUTLET LEG WHILE THE OTHER OUTLET LEG IS OPEN.
Claim 2
Dependent Claim
157 words
A GAS FLOW VALVE COMPRISING: (A) A THREE-WAY CONDUIT JUNCTION FOR USE IN A GAS FLOW CONDUIT AND HAVING AN INLET LEG AND TWO OUTLET LEGS; (B) A CENTRAL DAMPER PIVOTED IN THE JUNCTION SUBSTANTIALLY MIDWAY BETWEEN THE TWO OUTLET LEGS WHERE IT CAN PIVOT TO ALTERNATE POSITIONS EXTENDING PARTIALLY ACROSS EACH OF SAID OUTLET LEGS; (C) A SIDE DAMPER PIVOTED IN EACH OF SAID OUTLET LEGS AND MOVABLE BETWEEN A CLOSING POSITION WHEREIN IT COOPERATES WITH SAID CENTRAL DAMPER TO CLOSE ITS OUTLET LEG AND AN OPENING POSITION WHEREIN IT DOES NOT SUBSTANTIALLY OBSTRUCT THE FLOW OF GAS INTO ITS OUTLET LEG; AND (D) ACTUATING MEANS INTERCONNECTING SAID DAMPERS TOGETHER FOR SIMULTANEOUS MOVEMENT BETWEEN ALTERNATE POSITIONS WHEREIN SAID SIDE DAMPERS ARE MOVED ALTERNATELY INTO THEIR CLOSING AND OPENING POSITIONS WITH THE SIDE DAMPER WHICH IS IN ITS CLOSING POSITION COOPERATING WITH THE CENTRAL DAMPER TO CLOSE THAT OUTLET LEG WHILE THE OTHER OUTLET LEG IS OPEN.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-07-17 | 1971-01-16 | 1971-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-17 | 1975-01-16 | 1975-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-17 | 1979-01-16 | 1979-07-18 | $7700.00 | Window Closed / Lapsed |