Patent ID: 7632342

Claim:
An outlet cap adapted to be removably attached to the gas outlet of a gas discharge passageway in an on-off valve provided on a container containing a toxic gas, said outlet cap comprising: a bottom wall; a peripheral wall extending from the bottom wall; a gasket located on an inner surface of said bottom wall for sealing the gas outlet, said gasket being made of a material which does not chemically react with the toxic gas contained in the container to degrade the sealing property of the gasket, and said gasket having a through-hole centrally formed therein; and toxic-gas absorbing means fitted into the through-hole of the gasket, said toxic-gas absorbing means being exposed to said gas discharge passageway when said outlet cap is attached to said gas outlet, wherein the toxic-gas absorbing means consisting of a toxic-gas absorbent made of a material which can chemically react with the toxic gas to take and consume the toxic gas to thereby produce a solid product, and a barrier member which is permeable to the toxic gas and impermeable to the toxic-gas absorbent and the solid product produced, the barrier member being made of a sintered plate of metal and being fitted into the through-hole of the gasket on the side opposite to the bottom wall and adjacent to the toxic-gas absorbent.