Patent US4770212A successfully refreshed from Google Patents.
US4770212A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure compensated flow rate controllers
Assignee: Halliburton Co
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Filing: 1987-01-07
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Granted: 1988-09-13
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Expires: 2007-01-07
Abstract
Abstract A flow controller apparatus having few moving parts that may be inserted directly into a flow line to be responsive to flow pressure and maintain the flow rate constant. The flow controller consists of a tubular frame section having an internal bore that is a revolutional chamber having a maximum cross-sectional diameter at the inlet end and tapering, either linearly or non-linearly, toward a minimum cross-sectional area across a throat portion. A control rod and differential pressure plate supported axially movably in said chamber is spring biased toward the inlet end of the chamber, and is movable in response to upstream flow pressure to adjust the cross-sectional fluid flow area to maintain a constant flow rate.
Inventors
- 👤 Dennis A. Wienck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:30
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/20; F16K17/22; F16K17/24; F16K17/28; F16K17/30; G; G05; G05D; G05D7/00; G05D7/01; G05D7/0126; G05D7/0133
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
188 words
Apparatus for controlling fluid flow rate, comprising: frame means for allowing a fluid to flow therethrough having an inlet end, an outlet end, a throat portion therebetween and an interior wall defining a flow chamber that is an equi-centric, elongated volume having a linear central axis extending between said inlet and outlet ends, said flow chamber having a cross-sectional area perpendicular to said central axis, that varies between a maximum at the inlet end and a minimum at the throat portion proximate said inlet end; flow restrictor means for varying the flow rate of said fluid, having a cross-sectional area relative to said minimum at the throat portion, said flow restrictor means being supported for axial reciprocation between the inlet end and said throat portion; support means for slidably supporting said flow restrictor means having a cross-sectional area normal to the axis of said flow chamber; and spring means circumferentially disposed around said support means, for biasing said flow restrictor means toward a position in said flow chamber adjacent the inlet end having a maximum cross-sectional area, and away from the throat portion having a minimum cross-sectional area.
Claim 2
Dependent Claim
188 words
Apparatus for controlling fluid flow rate, comprising: frame means for allowing a fluid to flow therethrough having an inlet end, an outlet end, a throat portion therebetween and an interior wall defining a flow chamber that is an equi-centric, elongated volume having a linear central axis extending between said inlet and outlet ends, said flow chamber having a cross-sectional area perpendicular to said central axis, that varies between a maximum at the inlet end and a minimum at the throat portion proximate said inlet end; flow restrictor means for varying the flow rate of said fluid, having a cross-sectional area relative to said minimum at the throat portion, said flow restrictor means being supported for axial reciprocation between the inlet end and said throat portion; support means for slidably supporting said flow restrictor means having a cross-sectional area normal to the axis of said flow chamber; and spring means circumferentially disposed around said support means, for biasing said flow restrictor means toward a position in said flow chamber adjacent the inlet end having a maximum cross-sectional area, and away from the throat portion having a minimum cross-sectional area.
Claim 3
Dependent Claim
126 words
Apparatus as set forth in claim 1 wherein: said frame means includes a cylindrical conduit with an inside diameter defining said flow chamber having a constant cross-sectional area, said frame means includes an orifice plate secured transversely across said flow chamber proximate the inlet end, said orifice plate having an axial orifice defining a cross-sectional area less than said flow chamber cross-sectional area; and said flow restrictor means includes a control plug having a tapered surface adjacent the inlet end that presents less than the cross-sectional area of said flow chamber and tapers toward said orifice plate, and a differential plate rigidly connected to said control plug in spaced, axial alignment and approximating a selected cross-sectional area less than the cross-sectional area of said flow chamber.
Claim 4
Dependent Claim
67 words
Apparatus as set forth in claim 2 wherein said support means comprises: rod guide means for maintaining axial alignment of said flow restrictor means, secured axially in said flow chamber adjacent the outlet end; and rod means, slidably retained by said rod guide means in-line with said flow chamber axis, said rod means for rigidly securing and supporting said control plug and differential plate in spaced relationship.
Claim 5
Dependent Claim
29 words
Apparatus as set forth in claim 3 wherein said spring means comprises: a compression spring retained on said rod means between said differential plate and said rod guide means.
References Cited (Backward Citations)
US1635040A
Cited
FR74260E
Cited
US3106226A
Cited
US3431944A
Cited
US3952776A
Cited
US3952776B1
Cited
US4022113A
Cited
US4361166A
Cited
US4383550A
Cited
US4542766A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-09-13 | 1992-03-14 | 1992-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-13 | 1996-03-14 | 1996-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-13 | 2000-03-14 | 2000-09-13 | $7700.00 | Window Closed / Lapsed |