US3815636A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure reducing valve and flow control device
Assignee: Ris Irrigation Systems Pty Ltd
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Filing: 1972-06-20
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Granted: 1974-06-11
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Expires: 1992-06-20
Abstract
Abstract A flow control device for fluids in which an elastomeric member in contact with a body, has an elongated channel formed between body and elastomeric member with at least one wall of the channel formed by the elastomeric member, fluid being admitted to the channel at one end and allowed to flow from the other end, but the channel is so arranged that fluid fed to the channel exerts pressure on the elastomeric member to press the member to the body whereby to deform the elastomeric member to vary the crosssectional area of the said channel in accordance with the applied pressure.
Inventors
- 👤 S Menzel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:00
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/12; F16K31/36; F16K31/365; A; A01; A01G; A01G25/00; A01G25/02; A01G25/023; G; G05; G05D; G05D7/00; G05D7/01; G05D7/0106; G05D7/012; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7784; Y10T137/7792
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
171 words
A flow control device for fluids, comprising: a. a hollow body having an open end and a closed end and a frusto-conical inner wall that tapers from a larger diaMeter at the open end to a smaller diameter at the closed end; b. a fluid inlet adjacent the closed end and a fluid outlet adjacent the open end of said body; c. an open ended elastomeric sleeve disposed within said body and conformingly engaging said inner wall; d. an open elongated helical channel interposed between said sleeve and said inner wall and formed in either said body or said sleeve; e. a removable plug engaging the open end of said body, said elastomeric sleeve being confined at its one end between said plug and said body to seal said body and sleeve at that end, whereby fluid enters the body adjacent said closed end and flows into said sleeve and also into said channel and along said channel to said outlet while under control of fluid pressure exerted within said sleeve.
Claim 2
Dependent Claim
171 words
A flow control device for fluids, comprising: a. a hollow body having an open end and a closed end and a frusto-conical inner wall that tapers from a larger diaMeter at the open end to a smaller diameter at the closed end; b. a fluid inlet adjacent the closed end and a fluid outlet adjacent the open end of said body; c. an open ended elastomeric sleeve disposed within said body and conformingly engaging said inner wall; d. an open elongated helical channel interposed between said sleeve and said inner wall and formed in either said body or said sleeve; e. a removable plug engaging the open end of said body, said elastomeric sleeve being confined at its one end between said plug and said body to seal said body and sleeve at that end, whereby fluid enters the body adjacent said closed end and flows into said sleeve and also into said channel and along said channel to said outlet while under control of fluid pressure exerted within said sleeve.
Claim 3
Dependent Claim
37 words
A flow control device according to claim 1 characterized by a hollow strainer extending from said plug into the hollow of said body and engaging the said fluid inlet at the closed end of the said body.
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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) | 1977-06-10 | 1977-12-10 | 1978-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-10 | 1981-12-10 | 1982-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-10 | 1985-12-10 | 1986-06-11 | $7700.00 | Window Closed / Lapsed |