Patent ID: 9638181
Date: 2017-05-02
CPC Classifications: B65B,F01C,F04B,F04C

Claim:
1. Vacuum pump for applications in vacuum packaging machines, comprising: a cylinder, including an electric motor, two pump rotors including screw portions, said pump rotors being situated such that said screw portions are completely contained in the parallel cylindrical chambers and driven in rotation by said motor, each of said pump rotors including a central opening, a drive housing containing components for driving and synchronizing said pump rotors supporting said rotors by cantilever and serving as support and centering with respect to the cylinder, said drive housing including the following integral construction: two extended supports and a mounting surface, said two extended supports being tubular and disposed in said central openings of said pump rotors, first guide elements and second guide elements for guiding rotation of the rotors, the first and second guide elements support the rotors by cantilever, wherein said first guide elements are situated at the ends of said two extended supports and said second guide elements are incorporated in said drive housing, and wherein said cylinder rests against and is fastened to said mounting surface of said drive housing.