Patent US3247049A successfully refreshed from Google Patents.
US3247049A
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US
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Pressure relief valve for papermaking machine headbox
Assignee: Beloit Corp
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Filing: 1962-10-08
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Granted: 1966-04-19
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Expires: 1982-10-08
Abstract
No abstract record available.
Inventors
- 👤 Thomas G Mckie
- 👤 Donal J Wolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:05
CPC Classifications
D; D21; D21F; D21F1/00; D21F1/02; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7734
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
61 words
IN A STOCK DISTRIBUTION MECHANISM FOR A HIGH SPEED PAPERMAKING MACHINE INCLUDING, MEANS DEFINING A MANHOLE OPENING INTO A HEADBOX, THE COMBINATION COMPRISING A COVER FOR SAID OPENING, AND A PRESSURE RESPONSIVE RELEASABLE SUPPORT FOR SAID COVER FOR HOLDING IT OVER THE MANHOLE AND RELEASING THE COVER AT A PREDETERMINED PRESSURE WITHIN THE HEADBOX IN EXCESS OF A NORMAL OPERATING PRESSURE.
Claim 2
Dependent Claim
61 words
IN A STOCK DISTRIBUTION MECHANISM FOR A HIGH SPEED PAPERMAKING MACHINE INCLUDING, MEANS DEFINING A MANHOLE OPENING INTO A HEADBOX, THE COMBINATION COMPRISING A COVER FOR SAID OPENING, AND A PRESSURE RESPONSIVE RELEASABLE SUPPORT FOR SAID COVER FOR HOLDING IT OVER THE MANHOLE AND RELEASING THE COVER AT A PREDETERMINED PRESSURE WITHIN THE HEADBOX IN EXCESS OF A NORMAL OPERATING PRESSURE.
Claim 3
Dependent Claim
142 words
A PRESSURE RELEASE VALVE MECHANISM FOR RELIEVING PRESSURE AND PERMITTING THE ESCAPE OF A VOLUME OF FLUID FROM A CHAMBER SUCH AS A HIGH SPEED PAPER MACHINE HEADBOX COMPRISING, A MEMBER HAVING A PORT WITH MEANS DEFINING A SEAT SURROUNDING THE PORT, A MOVABLE PLATE MEMBER ADAPTED TO ENGAGE SAID SEAT, A FLEXIBLE DIAPHRAGM SUPPORTING SAID PLATE MEMBER FOR MOVEMENT RELATIVE TO SAID SEAT, A DISPHRAGM COVER SUPPORTING THE DIAPHRAGM AND FORMING A PRESSURE CHAMBER WITH THE DIAPHRAGM. PASSAGE MEANS COMMUNICATING WITH SAID PRESSURE CHAMBER FOR HOLDING THE PLATE MEMBER ON SAID SEAT, MEANS DEFINING A RELIEF VALVE OPENING IN SAID DIAPHRAGM COVER, AND A VALVE MEMBER POSITIONED TO CLOSE SAID VALVE OPENING AND BEING CONNECTED TO SAID PLATE MEMBER AND MOVED OFF THE VALVE OPENING AS THE PLATE MEMBER IS LIFTED OFF OF SAID SEAT BY FLUID PRESSURE IN SAID PORT.
Claim 4
Dependent Claim
142 words
A PRESSURE RELEASE VALVE MECHANISM FOR RELIEVING PRESSURE AND PERMITTING THE ESCAPE OF A VOLUME OF FLUID FROM A CHAMBER SUCH AS A HIGH SPEED PAPER MACHINE HEADBOX COMPRISING, A MEMBER HAVING A PORT WITH MEANS DEFINING A SEAT SURROUNDING THE PORT, A MOVABLE PLATE MEMBER ADAPTED TO ENGAGE SAID SEAT, A FLEXIBLE DIAPHRAGM SUPPORTING SAID PLATE MEMBER FOR MOVEMENT RELATIVE TO SAID SEAT, A DISPHRAGM COVER SUPPORTING THE DIAPHRAGM AND FORMING A PRESSURE CHAMBER WITH THE DIAPHRAGM. PASSAGE MEANS COMMUNICATING WITH SAID PRESSURE CHAMBER FOR HOLDING THE PLATE MEMBER ON SAID SEAT, MEANS DEFINING A RELIEF VALVE OPENING IN SAID DIAPHRAGM COVER, AND A VALVE MEMBER POSITIONED TO CLOSE SAID VALVE OPENING AND BEING CONNECTED TO SAID PLATE MEMBER AND MOVED OFF THE VALVE OPENING AS THE PLATE MEMBER IS LIFTED OFF OF SAID SEAT BY FLUID PRESSURE IN SAID PORT.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-18 | 1969-10-18 | 1970-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-18 | 1973-10-18 | 1974-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-18 | 1977-10-18 | 1978-04-19 | $7700.00 | Window Closed / Lapsed |