US3563268A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve systems
Assignee: THORN EMI INDUSTRIAL BOILERS Ltd
•
Filing: 1968-09-23
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Granted: 1971-02-16
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Expires: 1988-09-23
Abstract
Abstract A valve system for a liquid-containing vessel such as a boiler in which a valve chamber between connections leading to the vessel, to a control device and to exhaust contains a valve head which can close the connections to the vessel and to exhaust but can not close the connections to the control device.
Inventors
- 👤 Robert S Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:41
CPC Classifications
F; F16; F16K; F16K11/00; F16K11/02; F16K11/04; F16K11/044; F22; F22D; F22D11/00; Y; Y10; Y10T; Y10T137/00; Y10T137/7287
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
212 words
In equipment comprising a vessel for containing a liquid, a pipe connecting said vessel to a control device for controlling the supply of liquid to said vessel to maintain the liquid in the vessel at a substantially constant level, an exhaust outlet and a valve located in the pipe Between the vessel and the control device, which valve is arranged to control the flow of liquid between the control device and the vessel and between both the control device and the vessel and exhaust, the improvement wherein the valve comprises a valve body containing a chamber, a pair of valve seats within the chamber, which valve seats are located between the interior of the chamber and connections to the vessel and to exhaust, a connection to the control device leading from the valve chamber between the valve seats, and a valve-operating member comprising a stem and a head, the head being movable between a pair of limiting positions in each of which it is in engagement with one of the valve seats to close either the connection to the vessel or the connection to exhaust and the valve head being arranged so that, in each limiting position and in any intermediate position, it does not close the connection to the control device.
Claim 2
Dependent Claim
212 words
In equipment comprising a vessel for containing a liquid, a pipe connecting said vessel to a control device for controlling the supply of liquid to said vessel to maintain the liquid in the vessel at a substantially constant level, an exhaust outlet and a valve located in the pipe Between the vessel and the control device, which valve is arranged to control the flow of liquid between the control device and the vessel and between both the control device and the vessel and exhaust, the improvement wherein the valve comprises a valve body containing a chamber, a pair of valve seats within the chamber, which valve seats are located between the interior of the chamber and connections to the vessel and to exhaust, a connection to the control device leading from the valve chamber between the valve seats, and a valve-operating member comprising a stem and a head, the head being movable between a pair of limiting positions in each of which it is in engagement with one of the valve seats to close either the connection to the vessel or the connection to exhaust and the valve head being arranged so that, in each limiting position and in any intermediate position, it does not close the connection to the control device.
Claim 3
Dependent Claim
35 words
Equipment according to claim 1 wherein the valve chamber is of elongated form with the valve seats located one at each end of the chamber and the valve-operating member is movable axially of the chamber.
Claim 4
Dependent Claim
51 words
Equipment according to claim 1 wherein the valve chamber is of generally cylindrical form with the valve seats located diametrically opposite each other, the head of the valve-operating member being rotatable between its limiting positions and stop means being provided for preventing movement of the operating member beyond its limiting positions.
Claim 5
Dependent Claim
44 words
Equipment according to claim 1 wherein the vessel is a steam boiler and there are a pair of control devices and a pipe between each control device and the boiler with said valve located in each pipe between the boiler and the control device.
Claim 6
Dependent Claim
14 words
Equipment according to claim 4 wherein the control devices include chambers containing float valves.
Claim 7
Dependent Claim
13 words
Equipment according to claim 4 wherein the control devices include electronic sensing devices.
Claim 8
Dependent Claim
49 words
Equipment according to claim 5 in which there is a line extending from the top of the boiler to the top of each float chamber, said line comprising a first pipe extending from the boiler and a T-junction to which pipes extending to the two float chambers are connected.
Claim 9
Dependent Claim
82 words
Equipment according to claim 7 wherein there is a manually operable valve located in the pipe between the boiler and the T-junction, said manually operable valve including an operating member movable from an open position in which the boiler communicates with the two pipes leading from the T-junction and a closed position in which the connection from the boiler is shut off but an exhaust outlet is opened whereby the two pipes leading to the T-junction are in communication with the atmosphere.
References Cited (Backward Citations)
US210261A
Cited
US598572A
Cited
US682162A
Cited
US1253989A
Cited
US1602443A
Cited
US1793869A
Cited
GB499047A
Cited
US2189473A
Cited
GB877445A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |