Patent ID: 8323006
Filing Date: 2012-12-04
Classification: F04C,H02K

Abstract:
1. Scroll-type pumping apparatus comprising a stator comprising a fixed scroll member having an end plate with a first spiral wrap extending therefrom; an orbital scroll member having an end plate with a second spiral wrap extending therefrom to intermesh with the first spiral wrap; a plurality of flexible rods each having one end fixed to the orbital scroll member and another end fixed to the stator to support the orbital scroll member relative to the stator; and a linear drive system for driving the orbital scroll member to orbit relative to the fixed scroll member, without a bearing physically supporting a shaft that drives the orbital scroll member, wherein the linear drive system comprises a drive member having a magnet rotor being connected to the orbital scroll member, and surrounded in a radial direction by a plurality of coils for applying a magnetic force to the drive member to cause the orbital scroll member to orbit relative to the fixed scroll member with substantially no rotation thereof.