US3583427A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas cock
Assignee: Electricite de France SA
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Filing: 1968-12-12
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Granted: 1971-06-08
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Expires: 1988-12-12
Abstract
Abstract In a gas cock of the kind that has two coaxial bores of different diameter communicating respectively with an inlet and an outlet and a piston slidable into the smaller diameter bore to interrupt communication between the bores, the piston is provided with a plurality of sealing rings and can be advanced into the bore by distances determined by adjustable stop means to allow first one sealing ring and then another to engage the wall of the smaller diameter bore and as the rings become worn.
Inventors
- 👤 Hubert Taulier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:45
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/02; F16K37/00; Y; Y10; Y10T; Y10T137/00; Y10T137/598; Y10T137/6161; Y10T137/6164; Y10T137/8158; Y10T137/8326
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
192 words
In a gas cock of the kind which comprises a body portion formed with an inlet and an outlet and with two coaxial bores of different diameters, the inlet being in communication with one of the bores and the outlet being in communication with the other bore, a piston located in the larger diameter bore, sealing means whereby a seal is formed between the piston and the body portion, a second piston slideable into the smaller diameter bore and secured against axial movement relative to the first-mentioned piston, a sealing ring mounted on the second piston and capable of forming a seal between the second piston and the wall of the smaller diameter bore and so seal the inlet from the outlet and screw means whereby the first-mentioned piston can be moved axially in each direction, the improvement comprising the provision of at least one additional sealing ring on the second piston, and stop means limiting movement of the first-mentioned piston towards the smaller diameter bore, the stop means being adjustable to allow different ones of the sealing rings to come into sealing engagement with the walls of the smaller diameter bore.
Claim 2
Dependent Claim
192 words
In a gas cock of the kind which comprises a body portion formed with an inlet and an outlet and with two coaxial bores of different diameters, the inlet being in communication with one of the bores and the outlet being in communication with the other bore, a piston located in the larger diameter bore, sealing means whereby a seal is formed between the piston and the body portion, a second piston slideable into the smaller diameter bore and secured against axial movement relative to the first-mentioned piston, a sealing ring mounted on the second piston and capable of forming a seal between the second piston and the wall of the smaller diameter bore and so seal the inlet from the outlet and screw means whereby the first-mentioned piston can be moved axially in each direction, the improvement comprising the provision of at least one additional sealing ring on the second piston, and stop means limiting movement of the first-mentioned piston towards the smaller diameter bore, the stop means being adjustable to allow different ones of the sealing rings to come into sealing engagement with the walls of the smaller diameter bore.
Claim 3
Dependent Claim
54 words
A gas cock according to claim 1, wherein the screw means comprises a screw-threaded member in screw-threaded engagement with the body portion and coaxial with the first-mentioned piston and connecting means connecting the screw member to the first-mentioned piston while permitting relative rotation between the member and the first-mentioned piston about their common axis.
Claim 4
Dependent Claim
47 words
A gas cock according to claim 2, wherein the adjustable stop means comprises an axially adjustable stop member mounted on the screw-threaded member and arranged to abut the body portion or a member secured thereto to limit movement of the screw-threaded member towards the smaller diameter bore.
Claim 5
Dependent Claim
114 words
A gas cock according to claim 1, wherein the sealing means comprises a plurality of sealing rings mounted on the first-mentioned piston, the said piston, over at least a part of its length between two adjacent sealing rings, is of reduced diameter forming, together with the wall of the larger diameter bore, a chamber of annular cross section, and the body portion is formed with conduit means, providing communication between the said chamber and the exterior of the body portion, and there is provided valve means for controlling the flow of gas through the conduit means, and a resilient leakage-indicating sleeve surrounding the body portion and covering the outer end of the conduit means.
Claim 6
Dependent Claim
54 words
A gas cock according to claim 4, wherein the conduit means comprises a bore having an inner screw-threaded engagement with the threaded portion of the bore, a sealing washer mounted on the screw member and a head formed on the screw member and arranged to seat on the said shoulder through said sealing washer.
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) | 1974-06-07 | 1974-12-07 | 1975-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-07 | 1978-12-07 | 1979-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-07 | 1982-12-07 | 1983-06-08 | $7700.00 | Window Closed / Lapsed |