Patent ID: 11859766
Assignee: NIPPON PISTON RING CO., LTD.
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F  Y | IPC F

Claim 0:
1. A fusible plug for a high pressure gas cylinder, comprising:
a communication hole; and
a porous material attached to at least a part of the communication hole in a length direction,
all or a part of the porous material being impregnated with a low melting point alloy to composite the low melting point alloy,
wherein the porous material is a porous metal sintered body having pores with an area ratio of 30% or more and 50% or less and having pores with a diameter exceeding 5 μm among the pores of 80% or more in terms of area ratio with respect to all the pores, the porous metal sintered body having transverse rupture strength of 50 MPa or more as measured by determination of transverse rupture strength conforming to provisions of Japan Powder Metallurgy Association Standard JPMA M09-1992.