Patent US3654835A successfully refreshed from Google Patents.
US3654835A
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US
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Regeneration valve
Assignee: Scott Technologies Inc
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Filing: 1970-05-25
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Granted: 1972-04-11
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Expires: 1990-05-25
Abstract
Abstract A valve comprising a housing having an elongated chamber therein and first, second and third passages intersecting the chamber for connecting the chamber to corresponding valve ports. A generally hollow cylindrical flow controlling member is biased by a spring in a position normally closing the third passage from the chamber, and a generally hollow cylindrical flow responsive member is biased in the chamber axially adjacent and normally abutting the flow controlling member. The flow controlling member and the flow responsive member together define a flow path between the first and second passages, and the flow responsive member is provided with a restricted passage which defines a constriction in the flow path. In an illustrative application, the second and third passages of the valve are connected to the piston and rod ends, respectively, of an hydraulic cylinder, and fluid is supplied to and exhausted from the valve in a direction and at a rate determined by a conventional directional control valve. The valve of the present invention functions to provide a direct flow path from the piston to the rod end of the hydraulic cylinder when the rate of fluid flow, as controlled externally by the direction control valve, reaches a predetermined magnitude.
Inventors
- 👤 Donald A Sievenpiper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:49
CPC Classifications
F; F15; F15B; F15B11/00; F15B11/02; F15B11/024; F15B13/00; F15B13/02; F15B13/021; F15B2011/0243; F15B2211/00; F15B2211/30; F15B2211/305; F15B2211/30525; F15B2211/3056; F15B2211/30565; F15B2211/3058; F15B2211/31; F15B2211/3105; F15B2211/3111; F15B2211/315; F15B2211/3157; F15B2211/31576; F15B2211/80; F15B2211/86; F15B2211/8609; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2574; Y10T137/2579; Y10T137/2587; Y10T137/8593; Y10T137/87169
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
190 words
A valve comprising: a. a housing; b. a chamber in said housing; c. first, second and third passages intersecting said chamber for connecting said chamber to corresponding valve ports; d. metering means in said chamber and comprising a pair of individually biased members movable in response to the flow of fluid, said members normally biased in contact and defining therethrough a path placing said first and second passages in fluid communication with each other and closing said third passage, one of said members moving away from the other member to increase the amount of fluid flow between said first and second passages in response to an increase in the rate of fluid flow in one direction through said chamber, said members moving to open said third passage to said chamber when the fluid flow in another direction through said chamber reaches a predetermined rate, said third passage being opened by an amount depending upon the rate of fluid flow; and e. check valve means located in said third passage and arranged to permit flow from said third passage to the corresponding port but to prevent flow in the reverse direction.
Claim 2
Dependent Claim
190 words
A valve comprising: a. a housing; b. a chamber in said housing; c. first, second and third passages intersecting said chamber for connecting said chamber to corresponding valve ports; d. metering means in said chamber and comprising a pair of individually biased members movable in response to the flow of fluid, said members normally biased in contact and defining therethrough a path placing said first and second passages in fluid communication with each other and closing said third passage, one of said members moving away from the other member to increase the amount of fluid flow between said first and second passages in response to an increase in the rate of fluid flow in one direction through said chamber, said members moving to open said third passage to said chamber when the fluid flow in another direction through said chamber reaches a predetermined rate, said third passage being opened by an amount depending upon the rate of fluid flow; and e. check valve means located in said third passage and arranged to permit flow from said third passage to the corresponding port but to prevent flow in the reverse direction.
Claim 3
Dependent Claim
124 words
A valve according to claim 1 wherein said chamber is elongated and said passages are axially spaced therealong, and wherein said members of said metering means comprise: a. a flow controlling member biased in a position normally closing said third passage from said chamber; b. a flow responsive member axially adjacent said flow controlling member and biased normally in contact with said flow controlling member; and c. said flow controlling member and said flow responsive member together defining a flow path between said first and second passages and having a constriction therein whereby in response to a flow of fluid from said second passage into said path, a pressure reduction is created in the portion of the path defined by said flow controlling member.
Claim 4
Dependent Claim
48 words
A valve according to claim 2 wherein said flow controlling member is generally hollow cylindrical in shape, open at the end axially adjacent said flow responsive member, and having a port in the wall thereof placing the interior of said member in fluid communication with said first passage.
Claim 5
Dependent Claim
38 words
A valve according to claim 3 wherein said flow controlling member is provided with an annular shoulder adapted to engage a surface in said chamber for limiting travel of said member in a direction closing said third passage.
Claim 6
Dependent Claim
27 words
A valve according to claim 4 wherein a spring is included in said chamber for urging said flow controlling member in contact with said flow responsive member.
Claim 7
Dependent Claim
73 words
A valve according to claim 2 wherein said flow responsive member is generally hollow cylindrical in shape and provided with a first opening in the axial end wall which is adjacent said flow controlling member and a second opening in the sidewall thereof positioned so as to place said second passage in fluid communication with the interior of said flow responsive member, the first opening being of smaller area than the second opening.
Claim 8
Dependent Claim
28 words
A valve according to claim 6 wherein a portion of said axial end wall is in the path of fluid flowing from said first to said second passages.
Claim 9
Dependent Claim
27 words
A valve according to claim 6 wherein a spring is included in said chamber for urging said flow responsive member in contact with said flow controlling member.
Claim 10
Dependent Claim
166 words
In combination with the valve defined in claim 1: a. an hydraulic cylinder having a piston reciprocable therein; b. a first conduit connecting the piston end of said hydraulic cylinder with the port communicating with said second valve passage; c. a second conduit connecting the rod end of said hydraulic cylinder with the port communicating with said third valve passage; d. a directional flow control valve having an inlet port adapted to be connected to a source of fluid under pressure, an exhaust port adapted to be connected to a reservoir, a pair of motor ports and a movable control element for connecting each of said motor ports to either of said inlet and exhaust ports and for controlling the rate of flow of fluid therethrough; e. a third conduit connecting one of said motor ports with the port communicating with said first valve passage; and f. a fourth conduit connecting the other of said motor ports with the port communicating with said third valve passage.
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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) | 1975-04-11 | 1975-10-11 | 1976-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-11 | 1979-10-11 | 1980-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-11 | 1983-10-11 | 1984-04-11 | $7700.00 | Window Closed / Lapsed |