Patent US3321173A successfully refreshed from Google Patents.
US3321173A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low flow valve
Assignee: RTX Corp
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Filing: 1964-02-27
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Granted: 1967-05-23
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Expires: 1984-02-27
Abstract
No abstract record available.
Inventors
- 👤 Charles C Seger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:44
CPC Classifications
G; G05; G05D; G05D7/00; G05D7/01; G05D7/0106; G05D7/0113; G05D16/00; G05D16/04; G05D16/06; G05D16/063; G05D16/0638; G05D16/0641; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7793; Y10T137/7805
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
167 words
FOR A FLUID METERING DEVICE ADAPTED TO METER SMALL QUANTITIES OF FLOW, COMPRISING A HOLLOW VALVE HOUSING, A DIAPHRAGM SUPPORTED IN SAID HOUSING, A CLOSURE ELEMENT HAVING A SLEEVE SECURED TO SAID DIAPHRAGM AND EXTENDING TOWARD AN OPENING FORMED IN SAID HOUSING, AN ELEMENT MADE FROM A FLEXIBLE AND RESILIENT MATERIAL SECURED TO AND MOVABLE WITH SAID SLEEVE, A POROUS PLUG INSERTED IN SAID OPENING AND PROJECTING INTO SAID HOLLOW VALVE HOUSING, A NONPOROUS SURFACE SURROUNDING THE OUTER PERIPHERY OF SAID PLUG, SAID POROUS PLUG ALLOWING FLUID TO FLOW AXIALLY FROM THE BOTTOM SURFACE TO THE TOP SURFACE OF SAID PLUG AND MEANS FOR IMPARTING MOVEMENT TO SAID SLEEVE SO AS TO PERMIT SAID RESILIENT MATERIAL TO ENGAGE THE TOP SURFACE OF SAID PLUG WHICH IS PROJECTING INTO SAID HOLLOW VALVE HOUSING TO PROGRESSIVELY DEFORM ABOUT SAID TOP SURFACE TO ENCIRCLE THE SAME SO AS TO PROGRESSIVELY BLOCK OFF THE PORES OF SAID PLUG TO PERMIT A SMALL FLOW FOR A RELATIVELY LARGE DISPLACEMENT OF SAID SLEEVE.
Claim 2
Dependent Claim
167 words
FOR A FLUID METERING DEVICE ADAPTED TO METER SMALL QUANTITIES OF FLOW, COMPRISING A HOLLOW VALVE HOUSING, A DIAPHRAGM SUPPORTED IN SAID HOUSING, A CLOSURE ELEMENT HAVING A SLEEVE SECURED TO SAID DIAPHRAGM AND EXTENDING TOWARD AN OPENING FORMED IN SAID HOUSING, AN ELEMENT MADE FROM A FLEXIBLE AND RESILIENT MATERIAL SECURED TO AND MOVABLE WITH SAID SLEEVE, A POROUS PLUG INSERTED IN SAID OPENING AND PROJECTING INTO SAID HOLLOW VALVE HOUSING, A NONPOROUS SURFACE SURROUNDING THE OUTER PERIPHERY OF SAID PLUG, SAID POROUS PLUG ALLOWING FLUID TO FLOW AXIALLY FROM THE BOTTOM SURFACE TO THE TOP SURFACE OF SAID PLUG AND MEANS FOR IMPARTING MOVEMENT TO SAID SLEEVE SO AS TO PERMIT SAID RESILIENT MATERIAL TO ENGAGE THE TOP SURFACE OF SAID PLUG WHICH IS PROJECTING INTO SAID HOLLOW VALVE HOUSING TO PROGRESSIVELY DEFORM ABOUT SAID TOP SURFACE TO ENCIRCLE THE SAME SO AS TO PROGRESSIVELY BLOCK OFF THE PORES OF SAID PLUG TO PERMIT A SMALL FLOW FOR A RELATIVELY LARGE DISPLACEMENT OF SAID SLEEVE.
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) | 1970-05-22 | 1970-11-21 | 1971-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-22 | 1974-11-21 | 1975-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-22 | 1978-11-21 | 1979-05-23 | $7700.00 | Window Closed / Lapsed |