US4020861A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vapor recovery valve
Assignee: ITT Inc
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Filing: 1975-08-20
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Granted: 1977-05-03
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Expires: 1995-08-20
Abstract
Abstract A flow control valve particularly useful for a vapor recovery system of a gasoline station. Gasoline and gasoline vapor flow through separate passages in the valve. A restriction (venturi) is provided in the gasoline passage so that a pressure differential will be produced in the passage as a function of the rate of flow of gasoline passing therethrough. A first diaphragm carrying a valve element which controls the flow of fluid through the vapor passage is responsive to said pressure differential so that the flow rate of vapor passing through the valve will be proportional to the flow rate of gasoline. In each of two alternative embodiments, another diaphragm responsive to gasoline pressure is ganged to the valve to compensate for gasoline pressure variations. In a further embodiment, the vapor control valve operates in an "on-off" mode so that a maximum vapor "draw back" is effected whenever gasoline flow of any magnitude is extant.
Inventors
- 👤 Marwan S. Shihabi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:31
CPC Classifications
B; B67; B67D; B67D7/00; B67D7/04; B67D7/0476; B67D7/0478; B67D7/048; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2514; Y10T137/2521; Y10T137/5109
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
215 words
A control comprising: a valve housing including means defining first and second passage therethrough constructed to receive gasoline vapor and gasoline, respectively, said first passage being adapted to be coupled to a first line and said second passage being adapted to be coupled to a second line; a restriction in said second passage for producing a pressure differential proportional to the rate of flow of fluid passing through said second line, said housng being divided into first and second cavities by a movable member; first means providing flow communication between said first cavity and said restriction; second means providing flow communication between said second cavity and an unrestricted portion of said second passage whereby said movable member is subjected to said pressure differential; a valve seat formed in said first passage; and a valve element in said first passage fixed to said movable member and positioned to close said valve seat, said valve element shifting away from said valve seat in response to said pressure differential whereby the rate of flow of fluid passing through said first passage will be a predetermined function of the rate of flow of fluid passing through said second passage; and means biasing said valve element against said valve seat to normally prevent flow of fluid through said first passage.
Claim 2
Dependent Claim
215 words
A control comprising: a valve housing including means defining first and second passage therethrough constructed to receive gasoline vapor and gasoline, respectively, said first passage being adapted to be coupled to a first line and said second passage being adapted to be coupled to a second line; a restriction in said second passage for producing a pressure differential proportional to the rate of flow of fluid passing through said second line, said housng being divided into first and second cavities by a movable member; first means providing flow communication between said first cavity and said restriction; second means providing flow communication between said second cavity and an unrestricted portion of said second passage whereby said movable member is subjected to said pressure differential; a valve seat formed in said first passage; and a valve element in said first passage fixed to said movable member and positioned to close said valve seat, said valve element shifting away from said valve seat in response to said pressure differential whereby the rate of flow of fluid passing through said first passage will be a predetermined function of the rate of flow of fluid passing through said second passage; and means biasing said valve element against said valve seat to normally prevent flow of fluid through said first passage.
Claim 3
Dependent Claim
25 words
The invention as defined in claim 1, wherein said valve element is fixed rigidly to said movable member so as to be immovable relative thereto.
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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) | 1980-05-02 | 1980-11-01 | 1981-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-02 | 1984-11-01 | 1985-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-02 | 1988-11-01 | 1989-05-03 | $7700.00 | Window Closed / Lapsed |