Patent ID: 7500822
Filing Date: 2009-03-10
Classification: F04D

Abstract:
1. A load-lock and dry vacuum pump assembly, comprising: a load-lock having a load-lock housing including a first load-lock chamber and a second load-lock chamber, said load-lock housing including a mating system, wherein said mating system includes a support plate extending radially inwardly of the load-lock housing, a flange-like cylinder supported relative to the load-lock housing by the support plate, and a cylinder concentrically located relative to said flange-like cylinder, a dry vacuum pump integrally connected with said mating system, said dry vacuum pump including a shaft, a rotor, a first concentric cylinder and a second concentric cylinder extending outwardly from said rotor, wherein said first and said second concentric cylinders, said flange-like cylinder, and said cylinder concentrically located relative to said flange are axially arranged with respect to said shaft, flanges having helical structures selectively provided on said first and said second concentric cylinders, said flange-like cylinder, and said cylinder concentrically located relative said flange, and wherein said first and said second concentric cylinders spin relative to said flange-like cylinder and said cylinder concentrically located relative said flange to form a molecular drag compression stage; and a first valve selectively providing communication between the dry vacuum pump and the first chamber and a second valve selectively providing communication between the dry vacuum pump and the second chamber, the first and second valves including valves stems extending through the support plate.