Patent US3774639A successfully refreshed from Google Patents.
US3774639A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve
Assignee: Rhone Poulenc SA
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Filing: 1972-02-04
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Granted: 1973-11-27
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Expires: 1992-02-04
Abstract
Abstract The valve for controlling the flow of a fluid, particularly very small flows, comprising a block having at least one smooth face and at least two ducts extending through the block and terminating in the smooth face in an orifice. A slide is guided for movement substantially parallel to the smooth face and is moved, e.g., by means of a screw or pneumatically. A valve element movable with the slide is urged into sliding contact with the smooth face and a recess in the valve element is dimensioned to overlie and connect at least two of the orifices in at least one position of the slide.
Inventors
- 👤 R Commarmot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:42
CPC Classifications
F; F16; F16K; F16K11/00; F16K11/02; F16K11/06; F16K11/065; F16K11/0655; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86879
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
202 words
A valve for precisely controlling the flow of fluid, said valve comprising, in combination: a. a block having at least one smooth face; b. means defining at least two ducts in said block, said ducts each terminating at said smooth face in an orifice; c. a slide movable with respect to said block; d. guide means guiding said slide for movement substantially parallel to said smooth face; e. control means for effecting said movement; f. a separate valve element movable with said slide and in sliding contact with said smooth face, the valve element overlying all of the orifices in all positions of the slide; g. a leaf spring mounted on said slide substantially parallel to said smooth face and supporting said valve element; h. a coil spring mounted between said slide and said valve element with its axis perpendicular to said smooth face, said leaf spring and coil spring effective to urge said valve element against said smooth face; and i. a recess in said valve element dimensioned effective to overlie and connect at least two of said orifices in at least one position of said slide, the flow of liquid from one orifice to another being entirely via said recess.
Claim 2
Dependent Claim
202 words
A valve for precisely controlling the flow of fluid, said valve comprising, in combination: a. a block having at least one smooth face; b. means defining at least two ducts in said block, said ducts each terminating at said smooth face in an orifice; c. a slide movable with respect to said block; d. guide means guiding said slide for movement substantially parallel to said smooth face; e. control means for effecting said movement; f. a separate valve element movable with said slide and in sliding contact with said smooth face, the valve element overlying all of the orifices in all positions of the slide; g. a leaf spring mounted on said slide substantially parallel to said smooth face and supporting said valve element; h. a coil spring mounted between said slide and said valve element with its axis perpendicular to said smooth face, said leaf spring and coil spring effective to urge said valve element against said smooth face; and i. a recess in said valve element dimensioned effective to overlie and connect at least two of said orifices in at least one position of said slide, the flow of liquid from one orifice to another being entirely via said recess.
Claim 3
Dependent Claim
15 words
A valve as claimed in claim 1, wherein said control means comprises a screwthreaded member.
Claim 4
Dependent Claim
26 words
A valve as claimed in claim 1, wherein said control means comprises a pneumatically operated bellows and a lever interposed between Said bellows and said slide.
Claim 5
Dependent Claim
48 words
A valve as claimed in claim 1, wherein said guide means comprise two substantially parallel and non-extensible flexible blades connected to said block and said slide in planes substantially perpendicular to the smooth face, the valve element being positioned in said slide at a location between said blades.
Claim 6
Dependent Claim
19 words
A valve as claimed in claim 4, wherein said blades are the two legs of a single U-shaped member.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-26 | 1977-05-28 | 1977-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-26 | 1981-05-28 | 1981-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-26 | 1985-05-28 | 1985-11-27 | $7700.00 | Window Closed / Lapsed |