| 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> |
