Patent US3422842A successfully refreshed from Google Patents.
US3422842A
Expired / Lapsed
US
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Adjustable flow control
Assignee: Dole Valve Co
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Filing: 1966-11-16
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Granted: 1969-01-21
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Expires: 1986-11-16
Abstract
No abstract record available.
Inventors
- 👤 Howard L Erickson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:30
CPC Classifications
G; G05; G05D; G05D7/00; G05D7/01; G05D7/0106; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7784; Y10T137/7792
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
AN ADJUSTABLE FLOW CONTROL COMPRISING: A GENERALLY HOLLOW CASING HAVING AN INLET AND AN OUTLET, A PISTON SLIDABLY MOUNTED WITHIN SAID CASING AND HAVING AN OPENING FORMED THEREIN TO ALLOW THE FLOW OF FLUID FROM THE INLET TO THE OUTLET AND HAVING AN EDGE THEREOF COOPERABLE WITH SAID OUTLET FOR REGULATING THE RATE OF FLOW OF FLUID THERETHROUGH IN ACCORDANCE WITH THE AXIAL POSITION OF THE PISTON WITHIN THE CASING, A RESILIENT DIAPHRAGM OPERABLY AND SEALABLY SECURED BETWEEN THE PISTON AND THE CASING AT THE VICINITY OF SAID INLET TO PREVENT THE FLOW OF FLUID FROM THE INLET ABOUT THE EXTERIOR OF THE PISTON TO THE OUTLET, SAID DIAPHRAGM
Claim 2
Dependent Claim
109 words
AN ADJUSTABLE FLOW CONTROL COMPRISING: A GENERALLY HOLLOW CASING HAVING AN INLET AND AN OUTLET, A PISTON SLIDABLY MOUNTED WITHIN SAID CASING AND HAVING AN OPENING FORMED THEREIN TO ALLOW THE FLOW OF FLUID FROM THE INLET TO THE OUTLET AND HAVING AN EDGE THEREOF COOPERABLE WITH SAID OUTLET FOR REGULATING THE RATE OF FLOW OF FLUID THERETHROUGH IN ACCORDANCE WITH THE AXIAL POSITION OF THE PISTON WITHIN THE CASING, A RESILIENT DIAPHRAGM OPERABLY AND SEALABLY SECURED BETWEEN THE PISTON AND THE CASING AT THE VICINITY OF SAID INLET TO PREVENT THE FLOW OF FLUID FROM THE INLET ABOUT THE EXTERIOR OF THE PISTON TO THE OUTLET, 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) | 1972-01-21 | 1972-07-22 | 1973-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-21 | 1976-07-22 | 1977-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-21 | 1980-07-22 | 1981-01-21 | $7700.00 | Window Closed / Lapsed |