| 摘要 |
<p>A cylinder valve hand-wheel design is disclosed. The cylinder valve hand-wheel may include a pair of buttons disposed on opposite sides of the hand-wheel to enable rotation of the hand-wheel to close the cylinder valve. The buttons may have a series of ratchet teeth that engage corresponding ratchet teeth on an inner surface of the hand-wheel. The buttons can be spring-biased outward so that the ratchet teeth of the buttons and the inner surface of the hand-wheel are engaged, locking the hand-wheel rotationally and preventing operation of the cylinder valve. To operate the cylinder valve, a user can simply press down on the buttons to disengage the ratchet teeth, allowing the hand-wheel to be rotated. This arrangement prevents inadvertent closing of the cylinder valve, such as closing when a user bumps against an object during use. Other embodiments are described and claimed.</p> |
