US3785616A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metering valve
Assignee: Moore Products Co
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Filing: 1971-07-15
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Granted: 1974-01-15
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Expires: 1991-07-15
Abstract
Abstract A metering valve for precision flow control of fluids is shown having a body with a valve stem in threaded engagement in a valve holding member in the body for advancing and retracting movement to adjust the position of the stem. The body has a bushing or sleeve, preferably of resilient synthetic plastic material interposed between inlet and outlet fluid connections and exposed to the upstream pressure and a portion of the valve stem extends into the sleeve which portion is provided with a tapered helical thread or groove for fluid flow. The pitch of the threads on the threaded portion and the pitch of the tapered helical groove can be the same or slightly different. Provision is made for shut off of flow. The sleeve is preferably of a composition having a reduced coefficient of thermal expansion normal to its axis for use at elevated temperatures.
Inventors
- 👤 C Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:24
CPC Classifications
F; F16; F16K; F16K47/00; F16K47/04; F16K47/06
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
117 words
A metering valve comprising a body having an interior opening with fluid supply and delivery passageways communicating therewith, a metering member in said opening having a longitudinal bore, a valve stem having a portion extending into said bore, said metering member being of resilient synthetic plastic material and having a sleeve portion on the exterior surface of which pressure in said fluid supply passageway is effective for compressing said sleeve portion into engagement with said valve stem portion, said valve stem portion having a helical groove thereon for controlling flow therein as determined by the positioning of said stem portion along said metering member, said grooved valve stem portion and said metering member having an interference fit.
Claim 2
Dependent Claim
117 words
A metering valve comprising a body having an interior opening with fluid supply and delivery passageways communicating therewith, a metering member in said opening having a longitudinal bore, a valve stem having a portion extending into said bore, said metering member being of resilient synthetic plastic material and having a sleeve portion on the exterior surface of which pressure in said fluid supply passageway is effective for compressing said sleeve portion into engagement with said valve stem portion, said valve stem portion having a helical groove thereon for controlling flow therein as determined by the positioning of said stem portion along said metering member, said grooved valve stem portion and said metering member having an interference fit.
Claim 3
Dependent Claim
21 words
A metering valve as defined in claim 1 in which said helical groove is of diminishing cross section between its ends.
Claim 4
Dependent Claim
31 words
A metering valve as defined in claim 1 in which said valve stem and said body have interengageable portions for shutting off fluid flow between said supply and said delivery connections.
Claim 5
Dependent Claim
109 words
A metering valve comprising a body having an interior opening wtth fluid supply and delivery passageways communicating therewith, a metering member in said opening having a longitudinal bore, a valve stem having a portion extending into said bore, said stem portion having a helical groove thereon of diminishing cross section between its ends for controlling flow therein as determined by the positioning of said stem portion along said metering member, said body having mounted thereon a valve stem carrier, said threaded member comprising an internally threaded nut with which said threaded portion of said stem is in engagement, and said nut being of resilient plastic material for eliminating backlash.
Claim 6
Dependent Claim
109 words
A metering valve comprising a body having an interior opening wtth fluid supply and delivery passageways communicating therewith, a metering member in said opening having a longitudinal bore, a valve stem having a portion extending into said bore, said stem portion having a helical groove thereon of diminishing cross section between its ends for controlling flow therein as determined by the positioning of said stem portion along said metering member, said body having mounted thereon a valve stem carrier, said threaded member comprising an internally threaded nut with which said threaded portion of said stem is in engagement, and said nut being of resilient plastic material for eliminating backlash.
References Cited (Backward Citations)
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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) | 1977-01-14 | 1977-07-16 | 1978-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-14 | 1981-07-16 | 1982-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-14 | 1985-07-16 | 1986-01-15 | $7700.00 | Window Closed / Lapsed |