EP0105017B1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Flow control device
Assignee: RTX Corp
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Filing: 1983-09-09
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Granted: 1987-06-03
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Expires: 2003-09-09
Abstract
No abstract record available.
Inventors
- 👤 Kenneth Peter Hansen
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-25 18:41
CPC Classifications
F; F02; F02C; F02C9/00; F02C9/26; F02C9/263; G; G05; G05D; G05D16/00; G05D16/04; G05D16/10; G05D16/101; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7737; Y10T137/7781; Y10T137/7784; Y10T137/7787; Y10T137/7788
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
490 words
Flow control device, comprising: a housing (10) having fluid inlet and fluid outlet passages (15, 20) therein, a metering valve element (70) disposed in said housing (10) and having inlet and outlet windows (85, 90) therein corresponding to, and communicating with said fluid inlet and outlet passages (15, 20), respectively, said metering valve element (70) being selectively posjtionable within said housing (10) such that one (85) of said windows (85, 90) is disposed in selectively variable registry with one (15) of said inlet and outlet passages (15, 20) for adjusting the effective flow area therebetween; a pressure regulating valve element (95) disposed in said housing (10) for maintaining a constant pressure drop across said one metering valve window (85), said pressure regulating valve element having a first land (100) at one end thereof, and a second land (105) at the opposite end thereof, said pressure regulating valve element (95) being grounded to said housing (10) for movement independent of that of said metering element (70); a first pressure chamber (78) at said one end of said pressure regulating valve element (95) and passageway means providing fluid communication between said one (15) of said inlet and outlet passages (15, 20) and said first chamber (78); a second pressure chamber (80) at said opposite end of said pressure regulating valve element (95) and passageway means providing fluid communication between said one window (85) on a side thereof opposite said one (15) of said inlet and outlet passages (15, 20), and said second chamber (80); and spring means for balancing said pressure regulating valve element against fluid pressure in said first and second chamber (85, 90) for establishing the position of the pressure regulating valve element to maintain a relatively constant pressure drop across said window (85), said spring means comprising a spring (130) having one end thereof connected to said housing (10) and the opposite end thereof connected to said pressure regulating valve element (95), characterized in that said metering valve element (70) comprises a sleeve open at one end thereof, that the connection of said spring (130) to said pressure regulating valve element (95) extends through the open end of said metering valve element (70), that the pressure regulating valve element (95) is disposed within said metering valve element (70) defining said first pressure chamber (78) within said metering valve element (70) between the metering valve element (70) and the pressure regulating valve element (95), that one (100) of said lands (100, 105) of the pressure regulating valve elements (95) is in variable registry with the other (90) of said windows (85, 90) in said metering valve element (70) for adjusting the flow therethrough, and that the passageway means providing fluid communication between said one window (85) at a side thereof opposite said one (15) of said inlet and outlet passages (15, 20) and said second chamber (80) comprises a passageway (115, 120) formed in said pressure regulating valve element (95).
Claim 2
Dependent Claim
490 words
Flow control device, comprising: a housing (10) having fluid inlet and fluid outlet passages (15, 20) therein, a metering valve element (70) disposed in said housing (10) and having inlet and outlet windows (85, 90) therein corresponding to, and communicating with said fluid inlet and outlet passages (15, 20), respectively, said metering valve element (70) being selectively posjtionable within said housing (10) such that one (85) of said windows (85, 90) is disposed in selectively variable registry with one (15) of said inlet and outlet passages (15, 20) for adjusting the effective flow area therebetween; a pressure regulating valve element (95) disposed in said housing (10) for maintaining a constant pressure drop across said one metering valve window (85), said pressure regulating valve element having a first land (100) at one end thereof, and a second land (105) at the opposite end thereof, said pressure regulating valve element (95) being grounded to said housing (10) for movement independent of that of said metering element (70); a first pressure chamber (78) at said one end of said pressure regulating valve element (95) and passageway means providing fluid communication between said one (15) of said inlet and outlet passages (15, 20) and said first chamber (78); a second pressure chamber (80) at said opposite end of said pressure regulating valve element (95) and passageway means providing fluid communication between said one window (85) on a side thereof opposite said one (15) of said inlet and outlet passages (15, 20), and said second chamber (80); and spring means for balancing said pressure regulating valve element against fluid pressure in said first and second chamber (85, 90) for establishing the position of the pressure regulating valve element to maintain a relatively constant pressure drop across said window (85), said spring means comprising a spring (130) having one end thereof connected to said housing (10) and the opposite end thereof connected to said pressure regulating valve element (95), characterized in that said metering valve element (70) comprises a sleeve open at one end thereof, that the connection of said spring (130) to said pressure regulating valve element (95) extends through the open end of said metering valve element (70), that the pressure regulating valve element (95) is disposed within said metering valve element (70) defining said first pressure chamber (78) within said metering valve element (70) between the metering valve element (70) and the pressure regulating valve element (95), that one (100) of said lands (100, 105) of the pressure regulating valve elements (95) is in variable registry with the other (90) of said windows (85, 90) in said metering valve element (70) for adjusting the flow therethrough, and that the passageway means providing fluid communication between said one window (85) at a side thereof opposite said one (15) of said inlet and outlet passages (15, 20) and said second chamber (80) comprises a passageway (115, 120) formed in said pressure regulating valve element (95).
Claim 3
Dependent Claim
49 words
Flow control device according to claim 1, characterized in that said housing (10) includes a spring preload adjuster accessible from the exterior of said housing (10) and connected to said spring (130) for adjusting the reaction force applied by said spring (130) to said pressure regulating valve element (95).
Claim 4
Dependent Claim
52 words
Flow control device according to claim 2, characterized in that said preload adjuster comprises a spring mount connected to said spring (130), a guide (140) on which said spring mount is seated and means connected to said guide for adjusting the position of said guide (140) with respect to said housing (10).
Claim 5
Dependent Claim
42 words
Flow control device according to claim 3, characterized in that said means for adjusting the position of said guide (140) comprises a follower extending through said housing (10) and engageable with a cam manually adjustable from the exterior of said housing (10).
Claim 6
Dependent Claim
51 words
Flow control device according to claim 1, characterized by means for adjusting the preload of said spring (130) in response to the temperature of fluid handled by said flow control device, said preload adjusting means being grounded to said housing (10) for accurate preload adjustment independent of flow through said valve.
Claim 7
Dependent Claim
20 words
Flow control device of claim 5, characterized in that said temperature responsive means comprises a plurality of bimetallic elements (145).
Claim 8
Dependent Claim
93 words
Flow control device of claim 6, characterized by said metering valve element (70) including first and second fluid reaction surfaces (165, 170), a first (165) of said surfaces (165, 170) being pressurized by the admission of servo fluid thereagainst, the second fluid reaction surface (170) being pressurized with fluid handled by said flow control device to balance said metering valve element (70) against pressurization of said first fluid reaction surface (165), said open end of said metering valve (70) preventing pressurization thereof in opposition to the pressurization of said second reaction surface (170).
Claim 9
Dependent Claim
30 words
Flow control device according to claim 7, characterized by said second reaction surface (170) delimiting the first chamber (78) at said one end of said pressure regulating valve element (95).
References Cited (Backward Citations)
No citation records indexed.
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