| 摘要 |
<p>A gaseous fluid flow valve suitable for use in respiratory apparatus comprises a valve body (2) formed with an aperture (3) which is closed by a plate-like closure member (5). Spring biassing means (7), suitably in the form of a bowed spring (13), urge the closure member to the position in which it closes the aperture. Support means of the closure member constrain movement thereof to a predetermined path. To enable the force of the spring biassing means (7) on the closure member to be varied, the spring mounting means is adjustable. Where a bowed spring is employed the spring ends are supported in mountings secured to the valve body one or both of which is adjustable. Other spring configurations with adjustable mountings are referred to.</p> |
