Patent US3752184A successfully refreshed from Google Patents.
US3752184A
Expired / Lapsed
US
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Flow control valve
Assignee: Griswold Controls LLC
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Filing: 1971-12-02
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Granted: 1973-08-14
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Expires: 1991-12-02
Abstract
Abstract A flow control valve employs a ported cup which slides within an opening in a stationary member under increasing pressure differential and against the action of a spring, so that pressure differential changes have little or no effect on the rate of flow through the valve. A cylindrical side wall of the cup is provided with a plurality of axially extending duplicate series of circumferentially staggered separate port segments, the port segments in each of the series decreasing in circumferential width toward a closed end of the cup. Adjacent port segments in the series have end boundaries in substantially the same transverse plane normal to the cup axis, and one side boundary of each port segment in the series lies in a plane containing the axis of the cup. The shape and pattern of the port segments provide greater cup strength and minimize trapping of foreign objects carried by the fluid.
Inventors
- 👤 D Griswold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:51
CPC Classifications
G; G05; G05D; G05D7/00; G05D7/01; G05D7/0126; G05D7/0133; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7784; Y10T137/7792; Y10T137/8593; Y10T137/86493; Y10T137/86718; Y10T137/86734
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
75 words
A flow control valve having, in combination: a stationary member provided with an opening, a ported element mounted to slide axially within said opening and having at least one axially extending series of laterally staggered separate port segments, the port segments in said series each continuously decreasing in lateral width from end to end toward one end of said element, adjacent port segments in the series having end boundaries in substantially the same transverse plane.
Claim 2
Dependent Claim
75 words
A flow control valve having, in combination: a stationary member provided with an opening, a ported element mounted to slide axially within said opening and having at least one axially extending series of laterally staggered separate port segments, the port segments in said series each continuously decreasing in lateral width from end to end toward one end of said element, adjacent port segments in the series having end boundaries in substantially the same transverse plane.
Claim 3
Dependent Claim
37 words
The flow control valve of claim 1 in which each port segment is non-symmetrical and has one straight side boundary defined from end to end by a plane containing the axis of movement of the ported element.
Claim 4
Dependent Claim
69 words
The flow control valve of claim 1 in which each series of separate port segments has a first segment, a second segment and a third segment, the large end of the second segment being identical in shape and width to the small end of the first segment, and the small end of the second segment being identical in shape and width to the large end of the third segment.
Claim 5
Dependent Claim
89 words
In a flow control valve having a stationary member provided with an opening, and having a cup mounted to slide axially within said opening, the improvement comprising: a side wall forming a portion of the cup, said side wall having at least one axially extending series of laterally staggered separate port segments, the port segments in said series each continuously decreasing in lateral width from end to end toward one end of the cup, adjacent port segments in the series having end boundaries in substantially the same transverse plane.
Claim 6
Dependent Claim
89 words
In a flow control valve having a stationary member provided with an opening, and having a cup mounted to slide axially within said opening, the improvement comprising: a side wall forming a portion of the cup, said side wall having at least one axially extending series of laterally staggered separate port segments, the port segments in said series each continuously decreasing in lateral width from end to end toward one end of the cup, adjacent port segments in the series having end boundaries in substantially the same transverse plane.
Claim 7
Dependent Claim
37 words
The flow control valve of claim 4 in which each port segment is non-symmetrical and has one straight side boundary defined from end to end by a plane containing the axis of movement of the ported element.
Claim 8
Dependent Claim
69 words
The flow control valve of claim 4 in which each series of separate port segments has a first segment, a second segment and a third segment, the large end of the second segment being identical in shape and width to the small end of the first segment, and the small end of the second segment being identical in shape and width to the large end of the third segment.
Claim 9
Dependent Claim
44 words
The flow control valve of claim 4 in which a plurality of series of separate port segments are provided, at least one of said series having an additional axially extending port segment of greater lateral width than the adjacent port segment in that series.
Claim 10
Dependent Claim
45 words
The flow control valve of claim 4 in which at least two duplicate series of separate port segments are provided, one only of said two series having an additional axially extending port segment of greater lateral width than the adjacent port segment in that series.
Claim 11
Dependent Claim
85 words
A flow control element for use in a flow control valve, comprising: a cup having a side wall and an end wall, said side wall of the cup having at least one axially extending series of laterally staggered separate port segments, the port segments in said series each continuously decreasing in width from end to end toward said end wall of the cup, and the adjacent port segments in the series having end boundaries in substantially the same transverse plane normal to the cup axis.
Claim 12
Dependent Claim
85 words
A flow control element for use in a flow control valve, comprising: a cup having a side wall and an end wall, said side wall of the cup having at least one axially extending series of laterally staggered separate port segments, the port segments in said series each continuously decreasing in width from end to end toward said end wall of the cup, and the adjacent port segments in the series having end boundaries in substantially the same transverse plane normal to the cup axis.
Claim 13
Dependent Claim
44 words
The flow control element of claim 9 in which a plurality of series of separate port segments are provided, at least one of said series having an additional axially extending port segment of greater circumferential width than the adjacent port segment in that series.
Claim 14
Dependent Claim
45 words
The flow control element of claim 9 in which at least two duplicate series of separate port segments are provided, one only of said two series having an additional axially extending port segment of greater circumferential width than the adjacent port segment in that series.
Claim 15
Dependent Claim
99 words
A flow control element for use in a flow control valve, comprising: a cup having a side wall and an end wall, said side wall of the cup having at least one axially extending series of laterally staggered separate port segments, the port segments in said series each continuously decreasing in width from end to end toward said end wall of the cup, the adjacent port segments in the series having end boundaries in substantially the same transverse plane normal to the cup axis, each port segment having one side boundary defined by a plane containing the cup axis.
Claim 16
Dependent Claim
99 words
A flow control element for use in a flow control valve, comprising: a cup having a side wall and an end wall, said side wall of the cup having at least one axially extending series of laterally staggered separate port segments, the port segments in said series each continuously decreasing in width from end to end toward said end wall of the cup, the adjacent port segments in the series having end boundaries in substantially the same transverse plane normal to the cup axis, each port segment having one side boundary defined by a plane containing the cup axis.
Claim 17
Dependent Claim
86 words
A flow control element for use in a flow control valve, comprising: a cup having a cylindrical side wall and an end wall, said side wall of the cup having at least one axially extending series of circumferentially staggered separate port segments, the port segments in said series each continuously decreasing in circumferential width from end to end toward said end wall of the cup, the adjacent port segments in the series having end boundaries in substantially the same transverse plane normal to the cup axis.
Claim 18
Dependent Claim
86 words
A flow control element for use in a flow control valve, comprising: a cup having a cylindrical side wall and an end wall, said side wall of the cup having at least one axially extending series of circumferentially staggered separate port segments, the port segments in said series each continuously decreasing in circumferential width from end to end toward said end wall of the cup, the adjacent port segments in the series having end boundaries in substantially the same transverse plane normal to the cup axis.
Claim 19
Dependent Claim
148 words
In a flow control valve having a stationary member provided with a circular opening, and having a cup mounted to slide axially within said opening against the action of a spring, the improvement comprising: a cylindrical side wall forming a portion of the cup, said side wall having at least one axially extending series of circumferentially staggered separate port segments, the port segments in said series each continuously decreasing in circumferential width from end to end toward one end of the cup, adjacent port segments in the series having end boundaries in substantially the same transverse plane normal to the cup axis, and the port segments in the series being shaped so that their total exposed area on one side of the circular opening varies in an inverse manner with respect to the force of the spring for any position of the cup relative to the stationary member.
Claim 20
Dependent Claim
148 words
In a flow control valve having a stationary member provided with a circular opening, and having a cup mounted to slide axially within said opening against the action of a spring, the improvement comprising: a cylindrical side wall forming a portion of the cup, said side wall having at least one axially extending series of circumferentially staggered separate port segments, the port segments in said series each continuously decreasing in circumferential width from end to end toward one end of the cup, adjacent port segments in the series having end boundaries in substantially the same transverse plane normal to the cup axis, and the port segments in the series being shaped so that their total exposed area on one side of the circular opening varies in an inverse manner with respect to the force of the spring for any position of the cup relative to the stationary member.
Claim 21
Dependent Claim
115 words
A flow control valve having, in combination: a stationary member provided with a circular opening, a valve element having a cylindrical wall slidable within said opening, said wall having a plurality of axially extending duplicate port segments each continuously decreasing in lateral width from a large end to a small end, the small ends of the duplicate port segments lying in the same transverse plane, said wall having at least one additional axially extending port segment decreasing continuously in lateral width from a wide end to a narrow end, each additional port segment having its wide end lying substantially in said transverse plane, but circumferentially staggered with respect to each of said duplicate port segments.
Claim 22
Dependent Claim
115 words
A flow control valve having, in combination: a stationary member provided with a circular opening, a valve element having a cylindrical wall slidable within said opening, said wall having a plurality of axially extending duplicate port segments each continuously decreasing in lateral width from a large end to a small end, the small ends of the duplicate port segments lying in the same transverse plane, said wall having at least one additional axially extending port segment decreasing continuously in lateral width from a wide end to a narrow end, each additional port segment having its wide end lying substantially in said transverse plane, but circumferentially staggered with respect to each of said duplicate port segments.
Claim 23
Dependent Claim
40 words
The flow control valve of claim 15 in which each of said duplicate port segmeNts is non-symmetrical and has one straight side boundary defined from end to end by a plane containing the axis of movement of said valve element.
Claim 24
Dependent Claim
148 words
A flow control valve having, in combination: a stationary member provided with a circular opening, a valve element having a cylindrical wall slidable within said opening, said wall having a plurality of axially extending duplicate port segments each continuously decreasing in lateral width from a large end to a small end, the small ends of the duplicate port segments lying in the same transverse plane, said wall having a plurality of additional axially extending port segments each decreasing continuously in lateral width from a wide end to a narrow end, each additional port segment having its wide end lying substantially in said transverse plane, but circumferentially staggered with respect to each of said duplicate port segments, the total combined width of said wide ends of the additional port segments having the same transverse width as the total combined width of the small ends of said duplicate port segments.
Claim 25
Dependent Claim
148 words
A flow control valve having, in combination: a stationary member provided with a circular opening, a valve element having a cylindrical wall slidable within said opening, said wall having a plurality of axially extending duplicate port segments each continuously decreasing in lateral width from a large end to a small end, the small ends of the duplicate port segments lying in the same transverse plane, said wall having a plurality of additional axially extending port segments each decreasing continuously in lateral width from a wide end to a narrow end, each additional port segment having its wide end lying substantially in said transverse plane, but circumferentially staggered with respect to each of said duplicate port segments, the total combined width of said wide ends of the additional port segments having the same transverse width as the total combined width of the small ends of said duplicate port segments.
Claim 26
Dependent Claim
40 words
The flow control valve of claim 17 in which each of said duplicate port segments in non-symmetrical and has one straight side boundary defined from end to end by a plane containing the axis of movement of said valve element.
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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 |