US3643683A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Double venturi pressure regulator
Assignee: GERLACH INDUSTRIES Inc A CORP OF
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Filing: 1970-09-23
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Granted: 1972-02-22
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Expires: 1990-09-23
Abstract
Abstract A fluid pressure regulator casing has a piston valve in a cylinder coactive with an adjustable spring-pressed diaphragm to control flow of fluid from an inlet passage through an outlet duct across which extends a venturi tube for subjecting both said diaphragm and said piston valve to the pressure produced by fluid flow through said outlet duct past the venturi tube, so that the regulator may be small and may have greater capacity or outlet flow and less pressure drop in relation to prior regulators. A locking ring coaxially rotatable on a resilient flange on the casing coacts with said flange to lock and release an adjusting knob for the regulation of the spring pressure on the diaphragm with a minimum of possibility of unintentional rotation of the knob from its adjusted position.
Inventors
- 👤 Albert L Semon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:43
CPC Classifications
G; G05; G05D; G05D16/00; G05D16/04; G05D16/06; G05D16/063; G05D16/0644; G05D16/0663; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7754; Y10T137/7756; Y10T137/7757; Y10T137/7781; Y10T137/7793; Y10T137/7801
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
228 words
A fluid pressure regulator comprising a casing having inlet and outlet passages and a partition between said passages provided with a valve port to afford communication between said inlet passage and an outlet chamber which has an outlet duct which leads to said outlet passage and is smaller in cross section than said outlet chamber, said casing having a valve cylinder in which is a piston valve for controlling flow of fluid through said valve port and normally spring biased to cause one end thereof to close said port, a diaphragm secured in said casing and forming a closed space between itself and the side of the partition opposite said valve, a thrust pin slidably mounted in said partition and abuttingly interposed between said piston valve and said diaphragm, a venturi tube extending across said outlet duct and having an orifice in its wall facing in the direction of fluid flow through said outlet duct, the ends of said tube communicating with said closed space and with said valve cylinder beneath the other end of said piston valve, respectively, whereby said piston valve and the side of said diaphragm in said closed space are subject to fluid pressure produced by the fluid flow through said outlet duct past said venturi tube to said outlet passage, and means for applying regulating pressure to the opposite side of said diaphragm.
Claim 2
Dependent Claim
228 words
A fluid pressure regulator comprising a casing having inlet and outlet passages and a partition between said passages provided with a valve port to afford communication between said inlet passage and an outlet chamber which has an outlet duct which leads to said outlet passage and is smaller in cross section than said outlet chamber, said casing having a valve cylinder in which is a piston valve for controlling flow of fluid through said valve port and normally spring biased to cause one end thereof to close said port, a diaphragm secured in said casing and forming a closed space between itself and the side of the partition opposite said valve, a thrust pin slidably mounted in said partition and abuttingly interposed between said piston valve and said diaphragm, a venturi tube extending across said outlet duct and having an orifice in its wall facing in the direction of fluid flow through said outlet duct, the ends of said tube communicating with said closed space and with said valve cylinder beneath the other end of said piston valve, respectively, whereby said piston valve and the side of said diaphragm in said closed space are subject to fluid pressure produced by the fluid flow through said outlet duct past said venturi tube to said outlet passage, and means for applying regulating pressure to the opposite side of said diaphragm.
Claim 3
Dependent Claim
88 words
A fluid pressure regulator as defined in claim 1 wherein said valve port is at one end of said outlet chamber and has a valve seat for said end of said valve, said casing has an opening coaxial with said valve seat, there is a screw plug separably fitted in said opening and having therein said valve cylinder in which said valve is mounted, and said screw plug has a passage communicating at one end with said venturi tube and at its other end with said valve cylinder.
Claim 4
Dependent Claim
172 words
A fluid pressure regulator as defined in claim 1 wherein said casing has a chamber at the second-mentioned side of said diaphragm, the last-named means comprises an adjusting screw rotatably mounted in said casing and having a nut mounted relatively nonrotatably thereon and movable longitudinally thereof, a compression spring interposed between said nut and said diaphragm, and an inverted cup-shaped knob fixed on said screw and having a coaxial side wall fitted over said casing which has a coaxial exterior flange providing between itself and the wall of the casing an annular recess into which extends the side wall of saiD knob, said flange on the casing being slotted and resilient and having a frustoconical surface at its edge, and a clamping ring screw threaded on said casing flange and having a frustoconical surface to coact with said frustoconical surface on said casing flange for compressing said flange to clamp said side wall of the knob between said casing flange and the casing wall and thereby hold the knob in adjusted position.
Claim 5
Dependent Claim
79 words
A fluid pressure regulator as defined in claim 1 wherein said valve port is at one end of said outlet chamber and has a valve seat for said end of the valve, said outlet duct has its axis perpendicular to the axis of said outlet chamber and parallel to the axis of said outlet passage, and said venturi tube has its axis perpendicular to the axis of said outlet duct and lying in a diametral plane of said duct.
Claim 6
Dependent Claim
38 words
A fluid pressure regulator as defined in claim 4 wherein said piston valve is smaller in diameter than said valve seat and has an O-ring packing secured exteriorly thereto to engage said valve seat for closing said port.
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) | 1975-02-21 | 1975-08-23 | 1976-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-21 | 1979-08-23 | 1980-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-21 | 1983-08-23 | 1984-02-22 | $7700.00 | Window Closed / Lapsed |