US3391900A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diaphragm flow control device
Assignee: Dole Valve Co
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Filing: 1966-09-16
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Granted: 1968-07-09
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Expires: 1986-09-16
Abstract
No abstract record available.
Inventors
- 👤 Howard L Erickson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:54
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/12; F16K31/36; F16K31/40; F16K31/402; F16K31/404
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
A DIAPHRAGM FLOW CONTROL DEVICE COMPRISING: A RESILIENT DIAPHRAGM HAVING A CENTRAL FLUID PASSAGEWAY FORMED THERETHROUGH, A RESILIENT BOSS FORMED AT A FIRST SIDE OF THE DIAPHRAGM AND HAVING A VALVE SEAT FORMED THEREON ABOUT SAID CENTRAL FLUID PASSAGEWAY, AN ANNULAR INSERT MOLDED WITHIN SAID DIAPHRAGM AND FORMED CONCENTRICALLY WITH SAID CENTRAL FLUID PASSAGEWAY, SAID ANNULAR INSERT HAVING A DIVERGING NECK PORTION FACING AWAY FROM SAID FIRST SIDE OF THE DIAPHRAGM, A WAFER OF PRESSURE DEFORMABLE MATERIAL OVERLYING SAID DIVERGING NECK PORTION, MEANS DISPOSED BETWEEN SAID WAFER AND SAID NECK PORTION TO REDUCE THE SLIDING FRICTION THEREBETWEEN, SAID SUBSTANTIALLY RIGID TABS EXTENDING FROM A SECOND SIDE OF THE DIAPHRAGM OPPOSITELY OF SAID FIRST SIDE AND GIVING RIGIDITY TO SAID DIAPHRAGM.
Claim 2
Dependent Claim
120 words
A DIAPHRAGM FLOW CONTROL DEVICE COMPRISING: A RESILIENT DIAPHRAGM HAVING A CENTRAL FLUID PASSAGEWAY FORMED THERETHROUGH, A RESILIENT BOSS FORMED AT A FIRST SIDE OF THE DIAPHRAGM AND HAVING A VALVE SEAT FORMED THEREON ABOUT SAID CENTRAL FLUID PASSAGEWAY, AN ANNULAR INSERT MOLDED WITHIN SAID DIAPHRAGM AND FORMED CONCENTRICALLY WITH SAID CENTRAL FLUID PASSAGEWAY, SAID ANNULAR INSERT HAVING A DIVERGING NECK PORTION FACING AWAY FROM SAID FIRST SIDE OF THE DIAPHRAGM, A WAFER OF PRESSURE DEFORMABLE MATERIAL OVERLYING SAID DIVERGING NECK PORTION, MEANS DISPOSED BETWEEN SAID WAFER AND SAID NECK PORTION TO REDUCE THE SLIDING FRICTION THEREBETWEEN, SAID SUBSTANTIALLY RIGID TABS EXTENDING FROM A SECOND SIDE OF THE DIAPHRAGM OPPOSITELY OF SAID FIRST SIDE AND GIVING RIGIDITY TO SAID DIAPHRAGM.
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) | 1971-07-09 | 1972-01-08 | 1972-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-09 | 1976-01-08 | 1976-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-09 | 1980-01-08 | 1980-07-09 | $7700.00 | Window Closed / Lapsed |