Patent US3752182A successfully refreshed from Google Patents.
US3752182A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure compensated flow control valve
Assignee: Individual
•
Filing: 1971-04-21
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Granted: 1973-08-14
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Expires: 1991-04-21
Abstract
Abstract A valve for regulating the volume of fluid flow through a fluid line by the automatic movement of a cylindrical piston within a cylinder, the piston having an orifice in its one end and a plunger slidably disposed in its other end, the automatic movement being brought about by a pressure differential across the orifice and the regulation of flow being accomplished by the movement of the piston relative to the plunger.
Inventors
- 👤 G Brand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:32
CPC Classifications
F; F16; F16K; F16K3/00; F16K3/30; F16K3/34; F15; F15B; F15B13/00; F15B13/02; F15B13/04; F15B13/0416; F15B13/0417; F16K3/22; F16K3/24; F16K3/26; F16K3/265; F16K31/00; F16K31/12; F16K31/36; G; G05; G05D; G05D7/00; G05D7/01; G05D7/0126; G05D7/0133; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7784; Y10T137/7792
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
334 words
A fluid flow control valve comprising: a hollow housing having an interior wall, an exterior wall, an inlet end and an outlet end; a hollow piston slidably disposed in said housing and having an orifice wall closing one end thereof, said orifice wall disposed proximate said inlet end and having an orifice formed therethrough fluidly communicating said inlet end with the interior of said piston, said piston other end having an outer diameter of smaller dimension than said piston one end outer diameter thus forming a cavity area between said piston other end and said housing interior wall, said piston other end having a plurality of spaced inlet ports formed radially therein thereby fluidly connecting said piston interior with said cavity area, said orifice wall having an outer side and an inner side with said outer side facing said housing inlet end and said inner side facing said housing outlet end; a plunger slidably disposed in said piston other end, said plunger being imperforate axially and having a recess formed axially in one end thereof in fluid communication with said housing outlet end, said plunger one end having a plurality of spaced outlet ports formed radially therein for fluidly connecting said recess with said cavity area; a stopper disposed in said piston and against said orifice wall inner side wherein said orifice is closed, said stopper having an aperture formed axially therethrough to fluidly connect said housing inlet end with said piston interior; and a spring disposed in said piston interior between said stopper and said plunger for biasing said stopper against said orifice wall inner side and said piston toward said housing inlet end; wherein, when the volume of fluid passing through said aperture reaches a predetermined amount the pressure differential thereacross will cause said piston to slide on said plunger against said spring toward said housing outlet end thereby causing said piston other end to restrict said plunger outlet ports and thus reduce the flow of fluid through said housing outlet end.
Claim 2
Dependent Claim
334 words
A fluid flow control valve comprising: a hollow housing having an interior wall, an exterior wall, an inlet end and an outlet end; a hollow piston slidably disposed in said housing and having an orifice wall closing one end thereof, said orifice wall disposed proximate said inlet end and having an orifice formed therethrough fluidly communicating said inlet end with the interior of said piston, said piston other end having an outer diameter of smaller dimension than said piston one end outer diameter thus forming a cavity area between said piston other end and said housing interior wall, said piston other end having a plurality of spaced inlet ports formed radially therein thereby fluidly connecting said piston interior with said cavity area, said orifice wall having an outer side and an inner side with said outer side facing said housing inlet end and said inner side facing said housing outlet end; a plunger slidably disposed in said piston other end, said plunger being imperforate axially and having a recess formed axially in one end thereof in fluid communication with said housing outlet end, said plunger one end having a plurality of spaced outlet ports formed radially therein for fluidly connecting said recess with said cavity area; a stopper disposed in said piston and against said orifice wall inner side wherein said orifice is closed, said stopper having an aperture formed axially therethrough to fluidly connect said housing inlet end with said piston interior; and a spring disposed in said piston interior between said stopper and said plunger for biasing said stopper against said orifice wall inner side and said piston toward said housing inlet end; wherein, when the volume of fluid passing through said aperture reaches a predetermined amount the pressure differential thereacross will cause said piston to slide on said plunger against said spring toward said housing outlet end thereby causing said piston other end to restrict said plunger outlet ports and thus reduce the flow of fluid through said housing outlet end.
Claim 3
Dependent Claim
56 words
A flow control valve as defined in claim 1 and including an annular indent formed in said housing interior wall proximate said outlet end and an auxiliary port drilled radially through said housing and fluidly communicating with said indent, said indent being closed by said piston when said piston is biased toward said housing inlet end.
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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) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |