VACUUM PUMP

摘要

A vacuum pump, such as for example, a Roots- or screw-type pump, features several pump elements (14) arranged in a suction chamber (12).  At least one of the pump elements (14) is supported by a shaft (22).  The shaft (22) extends from the suction chamber out into a motor space (26) and is connected to a drive motor (30).  Outside of the motor space (26) there is a ventilator for cooling of a motor housing (20).  According to the invention, the ventilator (32) is connected to the shaft (22) via a contactless drive mechanism (46, 48).