| 摘要 |
<p>A gas supply device comprises a gas capsule 2 having a diaphragm closure 4. A cap 10 having a passage 12 therethrough is fixedly secured to the capsule 2. There is a valve member 14 in the passage 12, The valve member 14 has a forward face carrying a diaphragm-piercing device 20 able to be urged by application of a force against the bias of a spring 22 to pierce the diaphragm closure 4 to release gas from the capsule 2. Removal of the diaphragm-piercing force, causes a rearward face 30 of the valve member 14 to be biased by the spring 22 into a valve-closing position in which gas is retained in the capsule 2.</p> |
