Patent US4531539A successfully refreshed from Google Patents.
US4531539A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control valve for flow of solids
Assignee: TAPCO INTERNATIONAL Inc A DELAWARE Corp
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Filing: 1984-08-10
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Granted: 1985-07-30
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Expires: 2004-08-10
Abstract
Abstract Disclosed is a control valve for flow of solids or fluids which controls flow over a full range and provides a full opening for solids dumping. The control valve includes an orifice plate, a pair of slides disposed adjacent to and downstream of the orifice plate which are relatively moveable toward and away from one another to closed and open positions, and a flow control port in one of the slides which is closed when the slides are in the closed position and which is progressively opened as the slides are moved away from one another. An exit liner is provided downstream of the slides which centers flow after passage through the control port protecting the downstream side of the valve body from serious erosion. Guides for the slides are spaced apart at the center of the flow passage in the valve so that any buildup of solids are cleared on closing the slides. The wear prone parts of the valve are removable from the valve for repair or replacement without removing the valve from the line.
Inventors
- 👤 Frank J. Jandrasi
- 👤 Eric P. Ringle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:01
CPC Classifications
F; F16; F16K; F16K3/00; F16K3/30; F16K3/32; F16K3/02; F16K3/029; Y; Y10; Y10T; Y10T137/00; Y10T137/6851; Y10T137/7036
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
152 words
A flow control valve comprising, a body provided with a flow passage therethrough, an orifice plate removably secured in the flow passage, a pair of slides disposed adjacent to and downstream of the orifice plate and relatively moveable toward and away from one another to a closed position and to an open position, respectively, operable to close and open the flow passage, a flow control port in one of the slides permitting flow therethrough positioned to be closed when the slides are in the closed position and to be progressively opened as the slides are moved away relative to one another, and guides in the body, and interfitting groves and tongues in and on the guides and the slides disposed out of flow through the flow passage, there being a space between the guides at the flow passage whereby closing of the slides clears any build up of solids in the guides.
Claim 2
Dependent Claim
152 words
A flow control valve comprising, a body provided with a flow passage therethrough, an orifice plate removably secured in the flow passage, a pair of slides disposed adjacent to and downstream of the orifice plate and relatively moveable toward and away from one another to a closed position and to an open position, respectively, operable to close and open the flow passage, a flow control port in one of the slides permitting flow therethrough positioned to be closed when the slides are in the closed position and to be progressively opened as the slides are moved away relative to one another, and guides in the body, and interfitting groves and tongues in and on the guides and the slides disposed out of flow through the flow passage, there being a space between the guides at the flow passage whereby closing of the slides clears any build up of solids in the guides.
Claim 3
Dependent Claim
19 words
The flow control valve of claim 1 where, the guides comprise a separate guide for each of the slides.
Claim 4
Dependent Claim
128 words
A flow control valve comprising, a body provided with a flow passage therethrough, a chamber in the body disposed about and in fluid communication with the flow passage, a valve orifice removably disposed in the flow passage upstream and adjacent to the chamber, a pair of slides disposed in the chamber downstream of and adjacent to the orifice, the slides being slideable to and away from one another to a closed position and to an open position, respectively, and guides in the chamber, the guides and the slides having interfitting tongues and grooves disposed out of direct flow in the flow passage, there being a space between the guides at the flow passage whereby any buildup of solids is cleared upon moving the slides to the closed position.
Claim 5
Dependent Claim
128 words
A flow control valve comprising, a body provided with a flow passage therethrough, a chamber in the body disposed about and in fluid communication with the flow passage, a valve orifice removably disposed in the flow passage upstream and adjacent to the chamber, a pair of slides disposed in the chamber downstream of and adjacent to the orifice, the slides being slideable to and away from one another to a closed position and to an open position, respectively, and guides in the chamber, the guides and the slides having interfitting tongues and grooves disposed out of direct flow in the flow passage, there being a space between the guides at the flow passage whereby any buildup of solids is cleared upon moving the slides to the closed position.
Claim 6
Dependent Claim
28 words
The flow control valve of claim 3 where, the guides comprise a separate guide for each of the slides, and the guides are removably disposed in the chamber.
Claim 7
Dependent Claim
167 words
A flow control valve comprising, a body provided with a flow passage therethrough, a chamber in the body disposed about and in fluid communication with the flow passage, a valve orifice removably disposed in the passageway upstream of and adjacent to the chamber, a pair of slides disposed in the chamber downstream of and adjacent to the orifice, the slides being slideable to and away from one another to a closed position and to an open position, respectively, a flow control port in one of the slides permitting flow therethrough positioned to be closed when the slides are in the closed position and to be progressively opened as the slides are moved away from one another, and guides in the chamber, the guides and the slides having interfitting tongues and grooves disposed out of direct flow in the flow passage, there being a space between the guides at the flow passage whereby any buildup of the solids is cleared upon moving the slides to the closed position.
Claim 8
Dependent Claim
167 words
A flow control valve comprising, a body provided with a flow passage therethrough, a chamber in the body disposed about and in fluid communication with the flow passage, a valve orifice removably disposed in the passageway upstream of and adjacent to the chamber, a pair of slides disposed in the chamber downstream of and adjacent to the orifice, the slides being slideable to and away from one another to a closed position and to an open position, respectively, a flow control port in one of the slides permitting flow therethrough positioned to be closed when the slides are in the closed position and to be progressively opened as the slides are moved away from one another, and guides in the chamber, the guides and the slides having interfitting tongues and grooves disposed out of direct flow in the flow passage, there being a space between the guides at the flow passage whereby any buildup of the solids is cleared upon moving the slides to the closed position.
Claim 9
Dependent Claim
28 words
The flow control valve of claim 5 where, the guides comprise a separate guide for each of the slides, and the guides are removably disposed in the chamber.
Claim 10
Dependent Claim
192 words
A flow control valve comprising, a body provided with a flow passage therethrough, a chamber in the body disposed about and in fluid communication with the flow passage, a valve orifice removably disposed in the flow passage upstream of and adjacent to the chamber, a pair of slides disposed in the chamber downstream of and adjacent to the orifice, the slides being slideable to and away from one another to a closed position and to an open position, respectively, a flow control port permitting flow therethrough in one of the slides positioned to be closed when the slides are in the closed position and to be progressively opened as the slides are moved away from one another, guides in the chamber, the guides and the slides having interfitting tongue and grooves disposed out of direct flow in the passageway, the guides being spaced apart from one another adjacent the flow passage whereby any buildup of solids is cleared upon moving the slides to the closed position, and an exit liner downstream of and adjacent to the pair of slides operative to center flow in the flow passage downstream of the orifice plate.
Claim 11
Dependent Claim
192 words
A flow control valve comprising, a body provided with a flow passage therethrough, a chamber in the body disposed about and in fluid communication with the flow passage, a valve orifice removably disposed in the flow passage upstream of and adjacent to the chamber, a pair of slides disposed in the chamber downstream of and adjacent to the orifice, the slides being slideable to and away from one another to a closed position and to an open position, respectively, a flow control port permitting flow therethrough in one of the slides positioned to be closed when the slides are in the closed position and to be progressively opened as the slides are moved away from one another, guides in the chamber, the guides and the slides having interfitting tongue and grooves disposed out of direct flow in the passageway, the guides being spaced apart from one another adjacent the flow passage whereby any buildup of solids is cleared upon moving the slides to the closed position, and an exit liner downstream of and adjacent to the pair of slides operative to center flow in the flow passage downstream of the orifice plate.
Claim 12
Dependent Claim
15 words
The flow control valve of claim 7 where, the control port comprises an elongate slot.
Claim 13
Dependent Claim
21 words
The flow control valve of claim 7 where, the slides overlap one another, and the control port comprises an elongate slot.
Claim 14
Dependent Claim
36 words
The flow control valve of claim 7 where, the slides abut one another, and the control port comprises an elongate slot in one of the slides and a corresponding projection in the other of the slides.
Claim 15
Dependent Claim
55 words
The flow control valve of claim 7 where, the orifice plate, the guides and the exit liner are all releasably secured in place, the chamber has an opening of a size sufficient for removal of the guides, the slide valves, the exit liner and the valve orifice therethrough, and a cover relesably covering the opening.
Claim 16
Dependent Claim
38 words
The flow control valve of claim 7 including, a truncated conical section disposed in the passageway upstream of and adjacent to the valve orifice operative to prevent buildup of solids in an upstream portion of the flow passage.
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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) | 1988-07-29 | 1989-01-28 | 1989-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-29 | 1993-01-28 | 1993-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-29 | 1997-01-28 | 1997-07-30 | $7700.00 | Window Closed / Lapsed |