| 摘要 |
<p>1512313 Pneumatic refuse disosal BRUUN & SORENSEN A/S 19 March 1976 [21 March 1975] 11303/76 Heading B8A In a refuse disposal system comprising shoots leading to a transport tube communicating with a suction generatingplant, an air inlet valve is associated with a shoot or a group of shoots to open when suction is applied to the tube and then to close. Each valve may comprise a pair of valve plates interconnected and spring based so that one plate normally closes an aperture on the pipe but is moved away from the aperture when suction is applied, the other plate then being moved into a closing position.</p> |
