US3783887A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-closing valve device in a piping system of fluids
Assignee: Nippon Automation Kiki Co Ltd
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Filing: 1972-05-24
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Granted: 1974-01-08
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Expires: 1992-05-24
Abstract
Abstract A self-closing valve device in a piping system of fluids comprising : a permanent magnet provided in the upper part of a valve chamber, a globe valve member hanging down attracted by said permanent magnet, an inlet pipe for a fluid being connected to a primary side including an upper portion of the valve chamber and a piston in a control cylinder, an outlet pipe for a fluid located at the bottom of said valve chamber and adapted to close by fall of said globe valve member, said outlet pipe being connected to a secondary side of said control cylinder, and a shut-off valve disposed in a piping system connecting the inlet pipe to the outlet pipe, said shut-off valve being closed by pressure difference of a fluid through transmission means combined with the piston in the control cylinder.
Inventors
- 👤 A Shoji
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:17
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/44; F16K31/53; F16K31/54; F16K17/00; F16K17/36; F16K17/363; F16K31/02; F16K31/06; F16K31/08; Y; Y10; Y10T; Y10T137/00; Y10T137/0753
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
134 words
A self-closing valve device in a piping system of fluids comprising: a permanent magnet provided in the upper part of a valve chamber, a globe valve member suspended in said chamber and attracted by said permanent magnet, a fluid inlet pipe communicating with an upper portion of the valve chamber and one side of a piston in a control cylinder, a fluid outlet located at the bottom of said valve chamber and adapted to be closed by fall of said globe valve member, an outlet pipe communicating with said outlet and the other side of said control cylinder, and a shut-off valve disposed in a part of the piping system communicating said inlet pipe with said outlet pipe, said shutoff valve being closed through transmission means combined with the piston in the control cylinder.
Claim 2
Dependent Claim
134 words
A self-closing valve device in a piping system of fluids comprising: a permanent magnet provided in the upper part of a valve chamber, a globe valve member suspended in said chamber and attracted by said permanent magnet, a fluid inlet pipe communicating with an upper portion of the valve chamber and one side of a piston in a control cylinder, a fluid outlet located at the bottom of said valve chamber and adapted to be closed by fall of said globe valve member, an outlet pipe communicating with said outlet and the other side of said control cylinder, and a shut-off valve disposed in a part of the piping system communicating said inlet pipe with said outlet pipe, said shutoff valve being closed through transmission means combined with the piston in the control cylinder.
Claim 3
Dependent Claim
24 words
Apparatus as claimed in claim 1 wherein said globe valve member and said shut-off valve are in series in the same fluid flow path.
Claim 4
Dependent Claim
24 words
Apparatus as claimed in claim 1 wherein said globe valve member and said shut-off valve are located in parallel in separate fluid flow paths.
Claim 5
Dependent Claim
22 words
Apparatus as claimed in claim 1 wherein said transmission means comprises a fluid motor controlled by a valve actuated by said piston.
Claim 6
Dependent Claim
24 words
Apparatus as claimed in claim 1 wherein said other side of said control cylinder communicates with said outlet pipe downstream of said shut-off valve.
Claim 7
Dependent Claim
163 words
A self-closing valve device in a piPing system of fluids comprising: a permanent magnet provided in the upper part of a valve chamber, a globe valve member suspended in said chamber and attracted by said permanent magnet, a first control cylinder having first and second sides separated by a piston, and inlet pipe connected from a high pressure main pipe to said first side and the valve chamber, an outlet pipe at the bottom of said valve chamber and connected to a low pressure side of the main piping and the second side of said first control cylinder, the piston of said first control cylinder being connected through linking means to a valve provided in inlet piping from a high pressure side of the main piping, the piping connected to said valve being connected to one side of a second control cylinder having a second piston, and linking means coupled with said second piston for actuating a shut-off valve in the main piping.
Claim 8
Dependent Claim
163 words
A self-closing valve device in a piPing system of fluids comprising: a permanent magnet provided in the upper part of a valve chamber, a globe valve member suspended in said chamber and attracted by said permanent magnet, a first control cylinder having first and second sides separated by a piston, and inlet pipe connected from a high pressure main pipe to said first side and the valve chamber, an outlet pipe at the bottom of said valve chamber and connected to a low pressure side of the main piping and the second side of said first control cylinder, the piston of said first control cylinder being connected through linking means to a valve provided in inlet piping from a high pressure side of the main piping, the piping connected to said valve being connected to one side of a second control cylinder having a second piston, and linking means coupled with said second piston for actuating a shut-off valve in the main piping.
Claim 9
Dependent Claim
37 words
Apparatus as claimed in claim 6 wherein said outlet pipe at the bottom of said valve chamber is connected to a low pressure side of the main piping through said second side of said first control cylinder.
Claim 10
Dependent Claim
26 words
Apparatus as claimed in claim 6 wherein said valve provided in inlet piping from a high pressure side of the main piping comprises a three-way valve.
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) | 1977-01-07 | 1977-07-09 | 1978-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-07 | 1981-07-09 | 1982-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-07 | 1985-07-09 | 1986-01-08 | $7700.00 | Window Closed / Lapsed |