US3716069A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valves
Assignee: African Wire Ropes Ltd
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Filing: 1970-12-08
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Granted: 1973-02-13
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Expires: 1990-12-08
Abstract
Abstract A valve closure member formed as a piston in a sleeve with the valve being lifted out of the sleeve to enable slurry to pass, the piston being supplied with a special wiper provided to clean the sleeve on reciprocation therein with the valve also being guided back into the sleeve on closure. A peripheral track is provided around the sleeve to act as a trap for pebbles passing through the sleeve.
Inventors
- 👤 R Reynolds
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:15
CPC Classifications
F; F16; F16K; F16K3/00; F16K3/22; F16K3/24; F16K3/243; F16K25/00; Y; Y10; Y10T; Y10T137/00; Y10T137/4238; Y10T137/4245; Y10T137/4273; Y10T137/4336; Y10T137/7722; Y10T137/7837; Y10T137/7904; Y10T137/7908; Y10T137/7909; Y10T137/7913; Y10T137/7915; Y10T137/7916; Y10T137/7917; Y10T137/794; Y10T137/8013
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
216 words
A valve comprising a valve housing including a cylindrical sleeve forming a bore in the valve housing; a chamber into which the sleeve passes; a valve closure member reciprocable in the sleeve and capable of being raised into the chamber clear of the sleeve to permit fluid, sludge or the like to flow through the sleeve towards the chamber; a circumferentially disposed wiper means mounted around the closure member which is biased into engagement with the walls of the sleeve bore and which sweeps over said walls to cleanse the bore as the closure member reciprocates in the sleeve, the wiper means being located within the sleeve in the closed position of the valve; and a guide means including a mushroom headed pedestal connected to the valve closure member which acts to constrain the closure member for movement gravitationally in a path which returns it to the bore of the sleeve on closure of the valve and which limits the return travel of the closure member, and a compartment operatively connected to the chamber and into which the pedestal passes with the mushroom head trapped in the compartment, the compartment being adapted to be filled with liquid under pressure to ensure that any bleeding from the chamber into the compartment will be at a minimal level.
Claim 2
Dependent Claim
216 words
A valve comprising a valve housing including a cylindrical sleeve forming a bore in the valve housing; a chamber into which the sleeve passes; a valve closure member reciprocable in the sleeve and capable of being raised into the chamber clear of the sleeve to permit fluid, sludge or the like to flow through the sleeve towards the chamber; a circumferentially disposed wiper means mounted around the closure member which is biased into engagement with the walls of the sleeve bore and which sweeps over said walls to cleanse the bore as the closure member reciprocates in the sleeve, the wiper means being located within the sleeve in the closed position of the valve; and a guide means including a mushroom headed pedestal connected to the valve closure member which acts to constrain the closure member for movement gravitationally in a path which returns it to the bore of the sleeve on closure of the valve and which limits the return travel of the closure member, and a compartment operatively connected to the chamber and into which the pedestal passes with the mushroom head trapped in the compartment, the compartment being adapted to be filled with liquid under pressure to ensure that any bleeding from the chamber into the compartment will be at a minimal level.
Claim 3
Dependent Claim
216 words
A valve comprising a valve housing including a cylindrical sleeve forming a bore in the valve housing; a chamber into which the sleeve passes; a valve closure member reciprocable in the sleeve and capable of being raised into the chamber clear of the sleeve to permit fluid, sludge or the like to flow through the sleeve towards the chamber; a circumferentially disposed wiper means mounted around the closure member which is biased into engagement with the walls of the sleeve bore and which sweeps over said walls to cleanse the bore as the closure member reciprocates in the sleeve, the wiper means being located within the sleeve in the closed position of the valve; and a guide means including a mushroom headed pedestal connected to the valve closure member which acts to constrain the closure member for movement gravitationally in a path which returns it to the bore of the sleeve on closure of the valve and which limits the return travel of the closure member, and a compartment operatively connected to the chamber and into which the pedestal passes with the mushroom head trapped in the compartment, the compartment being adapted to be filled with liquid under pressure to ensure that any bleeding from the chamber into the compartment will be at a minimal level.
Claim 4
Dependent Claim
216 words
A valve comprising a valve housing including a cylindrical sleeve forming a bore in the valve housing; a chamber into which the sleeve passes; a valve closure member reciprocable in the sleeve and capable of being raised into the chamber clear of the sleeve to permit fluid, sludge or the like to flow through the sleeve towards the chamber; a circumferentially disposed wiper means mounted around the closure member which is biased into engagement with the walls of the sleeve bore and which sweeps over said walls to cleanse the bore as the closure member reciprocates in the sleeve, the wiper means being located within the sleeve in the closed position of the valve; and a guide means including a mushroom headed pedestal connected to the valve closure member which acts to constrain the closure member for movement gravitationally in a path which returns it to the bore of the sleeve on closure of the valve and which limits the return travel of the closure member, and a compartment operatively connected to the chamber and into which the pedestal passes with the mushroom head trapped in the compartment, the compartment being adapted to be filled with liquid under pressure to ensure that any bleeding from the chamber into the compartment will be at a minimal level.
Claim 5
Dependent Claim
15 words
The valve claimed in claim 1 in which the wiper means is a brush member.
Claim 6
Dependent Claim
31 words
The valve claimed in claim 1 further including a second guide means including a guide shaft mounted on the opposite end of the valve closure member from the first guide means.
Claim 7
Dependent Claim
31 words
The valve claimed in claim 1 including a resilient sealing means anchored around the periphery of the closure member which is biased into engagement with the bore walls of the sleeve.
Claim 8
Dependent Claim
41 words
The valve claimed in claim 4 in which the sealing means is a resilient sealing ring which defines a circumferential channel with its mouth directed towards the chamber and its outer wall flared to engages the walls of the sleeve bore.
Claim 9
Dependent Claim
25 words
The valve claimed in claim 4 where a pair of end plates hold the sealing means and wiper means in place between the end plates.
Claim 10
Dependent Claim
52 words
The valve claimed in claim 1 in which the sleeve projects into the chamber so that when the sleeve is substantially vertically located an annular duct is provided around the sleeve zone located in the chamber which serves as a trap preventing return of pebbles, grit or the like down the sleeve.
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) | 1976-02-13 | 1976-08-14 | 1977-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-13 | 1980-08-14 | 1981-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-13 | 1984-08-14 | 1985-02-13 | $7700.00 | Window Closed / Lapsed |