#$%^&*AU2015200809A120150910.pdf#####VACUUM MOTOR FOR OPERATION OF A LAVAGE SYSTEM ABSTRACT A vacuum motor (1) comprises a working plunger (12), an internal space, in which the working plunger (12) is arranged such that it is mobile in linear direction, a resetting element (22) that exerts, at least for part of the time, a force on the working plunger (12) that acts in the direction of a front side (4) of the internal space, a gas inlet opening (24) for supplying ambient air or a compressed gas into the internal space, and a gas outlet opening (26) for discharging the gas from the internal space, whereby the gas outlet opening (26) is connectable to a negative pressure source, whereby a control plunger (14) is arranged between the working plunger (12) and a rear side (6) of the internal space such as to be mobile in linear direction in the internal space, whereby the control plunger (14), in a first position, does not cover the gas outlet opening (26) and covers the gas inlet opening (24) and, in a second position, does not cover the gas inlet opening (24) and covers the gas outlet opening (26), the control plunger (14) is supported as in a bearing such as to be mobile with respect to the working plunger (12), and a catch element (18, 20, 42) and/or a spacer is arranged on said working plunger (12) and/or control plunger (14), whereby the catch element (18, 20, 42), upon a motion of the working plunger (12) towards the front side (4) of the internal space, transfers the control plunger (14) into the first position, and whereby the catch element (18, 20, 42) or the spacer, upon a motion of the working plunger (12) towards the rear side (6) of the internal space, transfers the control plunger (14) into the second position.
