Patent US2241070A successfully refreshed from Google Patents.
US3669142A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expansible tube valve with low pressure bleed
Assignee: Grove Valve and Regulator Co
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Filing: 1970-10-16
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Granted: 1972-06-13
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Expires: 1990-10-16
Abstract
Abstract A pressure regulating system including a main valve with an expansible tube stretched over a cylindrical barrier so that flow occurs around the barrier only when a pressure fluid in a control chamber around the tube is overcome by upstream pressure. A pilot valve senses downstream pressure and opens when it drops to a predetermined level to exhaust the control chamber to a low pressure zone. Flow around the barrier is increased by evacuating the control chamber to a zone within the valve housing at a pressure lower than downstream. This occurs in a zone wherein the static pressure of the downstream fluid line is converted by the flowing stream to a high velocity, low static pressure. In areas where an atmospheric bleed is not objectionable, a second pilot valve may be provided to exhaust the control chamber to atmosphere if downstream pressure drops to a set lower level.
Inventors
- 👤 Charles C Gerbic
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:21
CPC Classifications
F; F16; F16K; F16K7/00; F16K7/02; F16K7/04; F16K7/07; F16K7/075; G; G05; G05D; G05D16/00; G05D16/14; G05D16/16; G05D16/163; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7758; Y10T137/7762; Y10T137/7764
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
179 words
In an expansible tube valve comprising: a housing having inlet and outlet flow passages, a core sleeve secured in said housing with opposite ends thereof aligned with said flow passages, two axially spaced, inlet and outlet series of through openings around said core sleeve, a cylindrical barrier extending across said core sleeve intermediate said inlet and outlet series of openings, a sealing surface around said barrier, a flexible, expansible tube having an intermediate sealing portion normally snugly embracing said sealing surface and sealed around said housing at opposite ends thereof, and a port in said housing for introducing a control pressure fluid around said expansible sleeve, said housing being adapted for connection to a pilot valve duct system which opens in response to deterioration of pressure downstream of said outlet passage below a predetermined level, the improvement comprising: a bleed duct adapted to connect the outlet of said pilot valve system to a zone at a pressure lower than said downstream pressure within said core sleeve adjacent the radial plane of the upstream portions of said outlet through openings.
Claim 2
Dependent Claim
179 words
In an expansible tube valve comprising: a housing having inlet and outlet flow passages, a core sleeve secured in said housing with opposite ends thereof aligned with said flow passages, two axially spaced, inlet and outlet series of through openings around said core sleeve, a cylindrical barrier extending across said core sleeve intermediate said inlet and outlet series of openings, a sealing surface around said barrier, a flexible, expansible tube having an intermediate sealing portion normally snugly embracing said sealing surface and sealed around said housing at opposite ends thereof, and a port in said housing for introducing a control pressure fluid around said expansible sleeve, said housing being adapted for connection to a pilot valve duct system which opens in response to deterioration of pressure downstream of said outlet passage below a predetermined level, the improvement comprising: a bleed duct adapted to connect the outlet of said pilot valve system to a zone at a pressure lower than said downstream pressure within said core sleeve adjacent the radial plane of the upstream portions of said outlet through openings.
Claim 3
Dependent Claim
39 words
The combination defined by claim 1 wherein: said outlet through openings are configurated as longitudinal slots, and said bleed duct opens into the interior of said core sleeve adjacent the radial plane of the upstream ends of said slots.
Claim 4
Dependent Claim
175 words
In a pressure regulating system comprising: an expansible tube valve, a pilot valve operable by a controlled fluid pressure to open when said controlled pressure falls to a predetermined level, sensing duct means connecting said pilot valve to control pressure of fluid downstream of said expansible tube valve, said expansible tube valve comprising: a housing having inlet anD outlet flow passages, a cylindrical barrier extending partially across the interior of said housing intermediate said inlet and outlet flow passages, a sealing surface around said barrier, a flexible, expansible tube having an intermediate sealing portion normally snugly embracing said sealing surface and sealed around said housing at opposite ends thereof, a port in said housing introducing a control pressure fluid into a chamber around said expansible tube, the improvement comprising: exhaust duct means connecting said chamber to the inlet of said pilot valve, and bleed duct means connecting the outlet of said pilot valve to a zone within said housing near the downstream side of said barrier at a pressure lower than said controlled fluid pressure.
Claim 5
Dependent Claim
175 words
In a pressure regulating system comprising: an expansible tube valve, a pilot valve operable by a controlled fluid pressure to open when said controlled pressure falls to a predetermined level, sensing duct means connecting said pilot valve to control pressure of fluid downstream of said expansible tube valve, said expansible tube valve comprising: a housing having inlet anD outlet flow passages, a cylindrical barrier extending partially across the interior of said housing intermediate said inlet and outlet flow passages, a sealing surface around said barrier, a flexible, expansible tube having an intermediate sealing portion normally snugly embracing said sealing surface and sealed around said housing at opposite ends thereof, a port in said housing introducing a control pressure fluid into a chamber around said expansible tube, the improvement comprising: exhaust duct means connecting said chamber to the inlet of said pilot valve, and bleed duct means connecting the outlet of said pilot valve to a zone within said housing near the downstream side of said barrier at a pressure lower than said controlled fluid pressure.
Claim 6
Dependent Claim
49 words
The combination defined by claim 3 including: a core sleeve secured in said housing with opposite open ends thereof aligned with said flow passages, two axially spaced, inlet and outlet series of through openings around said sleeve, said barrier extending across said sleeve intermediate said inlet and outlet openings.
Claim 7
Dependent Claim
34 words
The pressure regulating system defined by claim 4 wherein: said outlet through openings are configurated as longitudinal slots, and said bleed duct opens adjacent the radial plane of the upstream ends of said slots.
Claim 8
Dependent Claim
21 words
The pressure regulating system defined by claim 4 wherein: said bleed duct opens at approximately the axis of said core sleeve.
Claim 9
Dependent Claim
82 words
The pressure regulating system defined by claim 3 including: a second pilot valve, second sensing duct means connecting said second pilot valve to control pressure of fluid downstream of said expansible tube valve, a second exhaust duct connecting said bleed duct to the inlet of said second pilot valve, a check valve in said bleed duct preventing flow of fluid away from said lower pressure zone, and a second bleed duct connecting the outlet of said second pilot valve to the atmosphere.
Claim 10
Dependent Claim
28 words
The pressure regulating system defined by claim 7 wherein: said second pilot valve is adjustable to open selectively at pressure levels higher or lower than said predetermined level.
Claim 11
Dependent Claim
27 words
The pressure regulating system defined by claim 7 wherein: said first pilot valve is adjustable to open selectively at pressure levels at or below said predetermined level.
Claim 12
Dependent Claim
19 words
The combination defined by claim 1 wherein: said bleed duct opens at approximately the axis of said core sleeve.
Claim 13
Dependent Claim
15 words
The combination defined by claim 1 wherein: the downstream side of said barrier is concave.
Claim 14
Dependent Claim
15 words
The combination defined by claim 3 wherein: the downstream side of said barrier is concave.
Claim 15
Dependent Claim
239 words
In a pressure regulating system comprising: an expansible tube valve, a first pilot valve operable by a controlled fluid pressure to open when said controlled pressure falls to a predetermined level, first sensing duct means connecting said pilot valve to control pressure of fluid downstream of said expansible tube valve, said expansible tube valve comprising: a housing having inlet and outlet flow passages, a cylindrical barrier extending partially across the interior of said housing intermediate said inlet and outlet flow passages, a sealing surface around said barrier, a flexible, expansible tube having an intermediate sealing portion normally snugly embracing said sealing surface and sealed around said housing at opposite ends thereof, a port in said housing introducing a control pressure fluid into a chamber around said expansible tube, the improvement comprising: exhaust duct means connecting said chamber to the inlet of said first pilot valve, first bleed duct means connecting the outlet of said first pilot valve to a low pressure zone downstream of said barrier, a second pilot valve, second sensing duct means connecting said second pilot valve to control pressure of fluid downstream of saiD expansible tube valve, a second exhaust duct connecting said bleed duct to the inlet of said second pilot valve, a check valve in said bleed duct preventing flow of fluid away from said low pressure zone, and a second bleed duct connecting the outlet of said second pilot valve to the atmosphere.
Claim 16
Dependent Claim
239 words
In a pressure regulating system comprising: an expansible tube valve, a first pilot valve operable by a controlled fluid pressure to open when said controlled pressure falls to a predetermined level, first sensing duct means connecting said pilot valve to control pressure of fluid downstream of said expansible tube valve, said expansible tube valve comprising: a housing having inlet and outlet flow passages, a cylindrical barrier extending partially across the interior of said housing intermediate said inlet and outlet flow passages, a sealing surface around said barrier, a flexible, expansible tube having an intermediate sealing portion normally snugly embracing said sealing surface and sealed around said housing at opposite ends thereof, a port in said housing introducing a control pressure fluid into a chamber around said expansible tube, the improvement comprising: exhaust duct means connecting said chamber to the inlet of said first pilot valve, first bleed duct means connecting the outlet of said first pilot valve to a low pressure zone downstream of said barrier, a second pilot valve, second sensing duct means connecting said second pilot valve to control pressure of fluid downstream of saiD expansible tube valve, a second exhaust duct connecting said bleed duct to the inlet of said second pilot valve, a check valve in said bleed duct preventing flow of fluid away from said low pressure zone, and a second bleed duct connecting the outlet of said second pilot valve to the atmosphere.
Claim 17
Dependent Claim
28 words
The pressure regulating system defined by claim 13 wherein: said second pilot valve is adjustable to open selectively at pressure levels higher or lower than said predetermined level.
Claim 18
Dependent Claim
27 words
The pressure regulating system defined by claim 13 wherein: said first pilot valve is adjustable to open selectively at pressure levels at or below said predetermined level.
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) | 1975-06-13 | 1975-12-13 | 1976-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-13 | 1979-12-13 | 1980-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-13 | 1983-12-13 | 1984-06-13 | $7700.00 | Window Closed / Lapsed |