Patent US3415284A successfully refreshed from Google Patents.
US3415284A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flap valve
Assignee: Parker Hannifin Manufacturing Switzerland SA
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Filing: 1966-10-26
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Granted: 1968-12-10
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Expires: 1986-10-26
Abstract
No abstract record available.
Inventors
- 👤 Stampfli Harald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:52
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/12; F16K31/126; F16K31/1266; F16K11/00; F16K11/02; F16K11/04; F16K11/044; F16K11/048; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/86622; Y10T137/8663
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
170 words
A FLAP VALVE COMPRISING AN ELONGATED SHELL PROVIDED WITH AT LEAST ONE FLAP SEAT FACING ONE LONGITUDINAL DIRECTION OF THE SHELL AND AT LEAST ONE FLAP SEAT FACING THE OPPOSITE LONGITUDINAL DIRECTION AND WITH COMMUNICATION PORTS TO EITHER SIDE OF EACH SEAT, A FLAP ADAPTED TO COOPERATE WITH EACH SEAT, AN ELONGATED MEMBER RIGIDLY CARRYING THE FLAPS AND ADAPTED TO MOVE LONGITUDINALLY OF THE SHELL BETWEEN A FIRST POSITION RAISING THE FLAP COOPERATING WITH THE FIRST-MENTIONED SEAT OFF ITS SEAT AND URGING THE FLAP COOPERATING WITH THE LAST-MENTIONED SEAT INTO ITS CLOSED POSITION WITH REFERENCE TO ITS SEAT AND A SECOND POSITION URGING THE FLAP COOPERATING WITH THE FIRST-MENTIONED SEAT INTO ITS CLOSED POSITION WITH REFERENCE TO ITS SEATS AND RAISING THE FLAP COOPERATING WITH THE LAST-MENTIONED SEAT OFF ITS SEAT AND A YIELDING WASHER EXTENDING BETWEEN EACH SEAT AND THE COOPERATING FLAP AND ADAPTED TO FLUIDTIGHTLY ENGAGE BOTH SAID SEAT AND FLAP AS LONG AS THE MOVABLE MEMBER IS NEAR THE POSITION FOR WHICH SAID FLAP ENGAGES THE SEAT.
Claim 2
Dependent Claim
170 words
A FLAP VALVE COMPRISING AN ELONGATED SHELL PROVIDED WITH AT LEAST ONE FLAP SEAT FACING ONE LONGITUDINAL DIRECTION OF THE SHELL AND AT LEAST ONE FLAP SEAT FACING THE OPPOSITE LONGITUDINAL DIRECTION AND WITH COMMUNICATION PORTS TO EITHER SIDE OF EACH SEAT, A FLAP ADAPTED TO COOPERATE WITH EACH SEAT, AN ELONGATED MEMBER RIGIDLY CARRYING THE FLAPS AND ADAPTED TO MOVE LONGITUDINALLY OF THE SHELL BETWEEN A FIRST POSITION RAISING THE FLAP COOPERATING WITH THE FIRST-MENTIONED SEAT OFF ITS SEAT AND URGING THE FLAP COOPERATING WITH THE LAST-MENTIONED SEAT INTO ITS CLOSED POSITION WITH REFERENCE TO ITS SEAT AND A SECOND POSITION URGING THE FLAP COOPERATING WITH THE FIRST-MENTIONED SEAT INTO ITS CLOSED POSITION WITH REFERENCE TO ITS SEATS AND RAISING THE FLAP COOPERATING WITH THE LAST-MENTIONED SEAT OFF ITS SEAT AND A YIELDING WASHER EXTENDING BETWEEN EACH SEAT AND THE COOPERATING FLAP AND ADAPTED TO FLUIDTIGHTLY ENGAGE BOTH SAID SEAT AND FLAP AS LONG AS THE MOVABLE MEMBER IS NEAR THE POSITION FOR WHICH SAID FLAP ENGAGES THE SEAT.
References Cited (Backward Citations)
US3186430A
Cited
US3294120A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-10 | 1972-06-10 | 1972-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-10 | 1976-06-10 | 1976-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-10 | 1980-06-10 | 1980-12-10 | $7700.00 | Window Closed / Lapsed |