US3703913A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic rate of flow control valve
Assignee: CVC CO
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Filing: 1971-08-02
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Granted: 1972-11-28
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Expires: 1991-08-02
Abstract
Abstract An automatic rate of flow control valve comprising an orifice plate and a conically shaped helical spring including a series of coils of decreasing diameter from a base coil on an upstream face of the plate, the inner diameter of each coil being equal to or greater than the outer diameter of the coils upstream thereof.
Inventors
- 👤 Paul W Carsten
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:42
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/32; F16K1/34; F16K1/36; F16K1/40; F16K15/00; F16K15/14; F16K15/144; F16K15/145; F16K2200/00; F16K2200/30; F16K2200/305; F16K2200/3053; Y; Y10; Y10S; Y10S251/00; Y10S251/902; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7838; Y10T137/7839; Y10T137/7869; Y10T137/7879; Y10T137/8593; Y10T137/87265; Y10T137/87555
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
128 words
An automatic rate of flow-control valve comprising: an orifice member for mounting in a fluid line and including a substantially flat upstream face having a plurality of orifices therethrough; and a conically shaped helical spring including a series of coils of decreasing diameter from a base coil of relatively large diameter on said upstream face around said orifices to an apex coil of relatively small diameter upstream of said orifice member, the inner diameter of at least the radially outermost coils being equal to or greater than the outer diameter of the coils upstream thereof, whereby said coils axially and in series close against and open from said upstream face with changes in pressure differential across said orifice member to maintain a uniform flow rate in said line.
Claim 2
Dependent Claim
128 words
An automatic rate of flow-control valve comprising: an orifice member for mounting in a fluid line and including a substantially flat upstream face having a plurality of orifices therethrough; and a conically shaped helical spring including a series of coils of decreasing diameter from a base coil of relatively large diameter on said upstream face around said orifices to an apex coil of relatively small diameter upstream of said orifice member, the inner diameter of at least the radially outermost coils being equal to or greater than the outer diameter of the coils upstream thereof, whereby said coils axially and in series close against and open from said upstream face with changes in pressure differential across said orifice member to maintain a uniform flow rate in said line.
Claim 3
Dependent Claim
46 words
The valve of claim 1 further comprising a housing including a fluid inlet and a fluid outlet for connection in said line and internal means for mounting said orifice member between said inlet and outlet such that fluid flows from upstream to downstream through said orifices.
Claim 4
Dependent Claim
18 words
The valve of claim 2 further comprising adjustable means extending into said housing for axially precompressing said spring.
Claim 5
Dependent Claim
46 words
The valve of claim 2 wherein: said housing is generally tubular; said orifice member comprises a flat plate; and said internal means comprises a seat on an inner surface of said housing for mounting said plate transverse to the direction of fluid flow through said housing.
Claim 6
Dependent Claim
71 words
The valve of claim 2 wherein: said internal means comprises a hollow member seated in said housing and including an open downstream facing end and a plurality of ports each having a seat for receiving an orifice member; and said valve includes a plurality of said orifice members mounted on said seats and a plurality of said conically shaped helical springs having base coils on upstream faces of said orifice members.
Claim 7
Dependent Claim
22 words
The valve of claim 5 further including adjustable means extending into said housing for axially precompressing at least one of said springs.
Claim 8
Dependent Claim
24 words
The valve of claim 5 wherein said hollow member is of generally triangular cross section including three substantially flat sides having said ports therein.
Claim 9
Dependent Claim
58 words
The valve of claim 7 wherein said hollow member is substantially co-axial with said housing in the direction of fluid flow and includes an upstream facing end having a port therein with one of said orifice members mounted therein With one of said conically shaped helical springs secured thereon with its base coil on an upstream face thereof.
Claim 10
Dependent Claim
89 words
The valve of claim 5 wherein: said housing is a globe-type body including a partition extending from a top of said housing transverse to the direction of flow through said inlet, an access hole in said top adjacent said partition and a seat on said partition and inner surface of said housing for vertically supporting said hollow member under said access hole whereby said hollow member, orifice members, and springs may be inserted and removed from said housing; and said valve includes a cap for sealing said access hole.
Claim 11
Dependent Claim
65 words
The valve of claim 9 wherein: said hollow member includes a port in an upper end facing said access hole with one of said orifice members mounted therein with one of said springs secured thereon with its base coil on an upper face thereof; and said valve further includes adjustable means extending through said cap to axially precompress said one spring under said access hole.
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) | 1975-11-28 | 1976-05-29 | 1976-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-28 | 1980-05-29 | 1980-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-28 | 1984-05-29 | 1984-11-28 | $7700.00 | Window Closed / Lapsed |