Patent ID: 8398388
Filing Date: 2013-03-19
Classification: F01C,F04C

Abstract:
1. A vane pump, comprising: an oval fixed portion of which an outer circumference is oval; a rotation ring that is rotatably disposed outside of the oval fixed portion with a gap and in which blade slots are formed in a predetermined depth along a circular interior circumference of the rotation ring at a predetermined interval from each other; blades of which one end thereof is slidably inserted into the blade slots respectively and of which the other end slidably contacts an outer surface of the oval fixed portion; an elastic member coupled to the rotation ring and elastically pushing the blades towards the oval fixed portion; and a drive portion connected to the rotation ring and rotating the rotation ring such that oil is sucked through an expanding space that is formed between at least two of the blades and oil is pumped through a shrinking space that is formed between at least two of the blades.