Patent US3175581A successfully refreshed from Google Patents.
US3175581A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-way poppet valve
Assignee: Modernair Corp
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Filing: 1962-09-04
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Granted: 1965-03-30
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Expires: 1982-09-04
Abstract
No abstract record available.
Inventors
- 👤 Karl A Brandenberg
- 👤 Peter F Carels
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:24
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/12; F16K31/42; F16K31/423; F15; F15B; F15B13/00; F15B13/02; F15B13/04; F15B13/0401; F15B13/0405; F16K27/00; F16K27/003; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87169; Y10T137/87193; Y10T137/87201; Y10T137/87209
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
176 words
IN A MULTI-WAY VALVE HAVING AN INLET CONNECTABL WITH A SOURCE OF PRESSURIZED FLUID, AN EXHAUST, AND A PLURALITY OF CONTROL PORTS TO BE SELECTIVELY COMMUNICATED WITH SAID INLET AND EXHAUST, THE COMBINATION COMPRISING A PLURALITY OF PRIMARY VALVE UNITS EACH HAVING ONE PORT CONNECTED WITH SAID INLET, A SECOND PORT CONNECTED WITH SAID EXHAUST, A THIRD PORT CONNECTED WITH ONE OF SAID CONTROL PORTS, AND A FOURTH PORT, SAID VALVE UNITS EACH HAVING A TWO POSITION VALVING ELEMENT FOR SHIFTING COMMUNICATION FROM BETWEEN SAID THIRD AND SECOND PORTS TO BETWEEN SAID THIRD AND FIRST PORTS IN RESPONSE TO MOVEMENT OF THE ELEMENT BETWEEN THE TWO POSITIONS THEREOF, EACH SAID VALVING ELEMENT MOVABLE BETWEEN SAID TWO POSTIONS IN RESPONSE TO SHIFTS IN PRESSURE AT SAID FOURTH PORTS BETWEEN RELATIVELY HIGH AND LOW VALUES, PILOT MEAND HAVING FIRST AND SECOND PILOT PRTS, SAID FIRST PILOT PORT COMMUNICATED WITH SAID FOURTH PORTS, SAID PILOT MEANS INCLUDING A PILOT VALVE HAVING FIRST AND SECOND PASSAGES SAID FIRST PASSAGE OF SAID PILOT VALVE COMMUNICATED WITH FIRST PORTS, SAID SECOND PAS-
Claim 2
Dependent Claim
176 words
IN A MULTI-WAY VALVE HAVING AN INLET CONNECTABL WITH A SOURCE OF PRESSURIZED FLUID, AN EXHAUST, AND A PLURALITY OF CONTROL PORTS TO BE SELECTIVELY COMMUNICATED WITH SAID INLET AND EXHAUST, THE COMBINATION COMPRISING A PLURALITY OF PRIMARY VALVE UNITS EACH HAVING ONE PORT CONNECTED WITH SAID INLET, A SECOND PORT CONNECTED WITH SAID EXHAUST, A THIRD PORT CONNECTED WITH ONE OF SAID CONTROL PORTS, AND A FOURTH PORT, SAID VALVE UNITS EACH HAVING A TWO POSITION VALVING ELEMENT FOR SHIFTING COMMUNICATION FROM BETWEEN SAID THIRD AND SECOND PORTS TO BETWEEN SAID THIRD AND FIRST PORTS IN RESPONSE TO MOVEMENT OF THE ELEMENT BETWEEN THE TWO POSITIONS THEREOF, EACH SAID VALVING ELEMENT MOVABLE BETWEEN SAID TWO POSTIONS IN RESPONSE TO SHIFTS IN PRESSURE AT SAID FOURTH PORTS BETWEEN RELATIVELY HIGH AND LOW VALUES, PILOT MEAND HAVING FIRST AND SECOND PILOT PRTS, SAID FIRST PILOT PORT COMMUNICATED WITH SAID FOURTH PORTS, SAID PILOT MEANS INCLUDING A PILOT VALVE HAVING FIRST AND SECOND PASSAGES SAID FIRST PASSAGE OF SAID PILOT VALVE COMMUNICATED WITH FIRST PORTS, SAID SECOND PAS-
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) | 1968-03-29 | 1968-09-28 | 1969-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-29 | 1972-09-28 | 1973-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-29 | 1976-09-28 | 1977-03-30 | $7700.00 | Window Closed / Lapsed |