Vacuum suction piece with auxiliary vacuum chamber - has elastic membrane separating it from interior, with control pipe, valve and main pipe

摘要

The vacuum suction piece incorporates an auxiliary vacuum chamber (3) separated by an elastic membrane (4) from the interior (2). The auxiliary vacuum chamber (3) is joined to a main pipe (8) by means of a control pipe (5) bridging a valve (12) in the main pipe (8). The valve (12) has a narrower part (10). Between the end of the valve's main part (6) and the valve-chamber (9) is pref. a spring (7) as a return piece. A duct (11) in the valve chamber (9) connects the vacuum main pipe (8) to the end of the valve body (6). ADVANTAGE - The simply designed vacuum suction piece switches the interior automatically to the vacuum plant, and, when no vacuum builds up, the interior is separated off.