Patent ID: 6604924
Filing Date: 2003-08-12
Classification: F01C,F04C

Abstract:
Positive-displacement pump, comprising:a vane for mutually separating two chambers in a housing interior wherein the vane is driven by a drive shaft that is arranged in the pump housing and guided such that it can be radially displaced relative to the drive shaft in a plane that contains the drive shaft axis, wherein the respective ends of the vane carry sealing strips that adjoin the inner circumferential wall of the housing interior in a sealing fashion and can be radially moved relative to the axis of the drive shaft independently of one another, at least one energy storing device engaging the vane, wherein said energy storing device constantly holds both sealing strips in sealing contact with the inner circumferential wall of the housing interior, wherein the vane includes two vane elements each of which include symmetrically stepped end faces, wherein each end face engages the other end face in a half-lap fashion, and wherein the end faces are respectively supported on one limb of a Z-shaped spring that is inserted between the end faces.