| 摘要 |
<p>A mount is provided including a support for supporting a pipe therefrom with the bowl portion of the pipe opening upwardly and vacuum generator structure is supported from the mount and includes an inlet and an outlet. Passage defining structure is provided and includes inlet and outlet end portions with the inlet end portion including structure for releasable scaled engagement with the smoke outlet in the free end portion of the stem of a pipe supported from the support structure. The outlet end portion is disposed in sealed communication with the inlet of the vacuum generating structure and the passage defining structure includes filler structure disposed therein and an ambient air inlet for admitting ambient air into the passage defining structure. The ambient air inlet includes adjustable valve means operatively associated therewith for variably throttling the admission of ambient air into the passage defining structure through the ambient air inlet.</p> |
