US 7,111,818 B2Granted

Safety valve

AssigneeNeriki Valve Co., Ltd.

InventorsMasaru Takeda, Akira Oi, Mitsumasa Kagomoto, Shinji Maekawa, Kazuyuki Miyata, Mari Shiotsuki

Life of this patent

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Abstract

A safety valve comprises a pressure receiving hole (20), an actuation chamber (21), a discharging hole (22) and an alloy accommodating chamber (25). An alloy (27) of a low-temperature melting point is accommodated within the alloy accommodating chamber (25). A sealing plate (33) seals the pressure receiving hole (20). This sealing plate (33) has a portion, which faces the pressure receiving hole (20), provided with a breakable sealing portion (35) that breaks up with a predetermined pressure. An actuator (28) is arranged within the actuation chamber (21). The actuator (28) has one end formed with a first back-up portion (30) which supports the breakable sealing portion (35) and has the other end formed with a second back-up portion (31) which is supported by the alloy (27).

Claims5

Dependent claims

A safety valve comprising a pressure receiving hole (20), an actuation chamber (21), a discharging hole (22) and an alloy accommodating chamber (25), a sealing member (34) sealing the pressure receiving hole (20) so as to be able to cancel the sealing, the sealing member (34) being supported by an alloy (27) of a low-temperature melting point accommodated within the alloy accommodating chamber (25),

the sealing member (34) being composed of a sealing plate (33), this sealing plate (33) having at least a portion, which faces the pressure receiving hole (20), provided with a breakable sealing portion (35) that breaks up with a predetermined pressure,
an actuator (28) being arranged in the actuation chamber (21), the actuator (28) having one end formed with a first back-up portion (30) which supports the breakable sealing portion (35) and having the other end formed with a second back-up portion (31) which is supported by the alloy (27) of the low-temperature melting point.

Dependencies are inferred from the claim text.

Facts

Application: 11/085,467Filed 21 Mar 2005
Priority: JP P 2004-09424929 Mar 2004
Published: US 2005/0211940 A129 Sep 2005
Granted: 26 Sep 2006
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

F16K 1/305
Shut-off valves with additional means: with valve member and actuator on the same side of the seat
F16K 1/307
Specially adapted for pressure containers: additional means used in combination with the main valve
F16K 17/383
Of excessive temperature: the valve comprising fusible, softening or meltable elements, e.g. used as link, blocking element, seal, closure plug
Y10T 137/1819
Heat destructible or fusible: safety cut-off