US Patent 7275918 Scroll apparatus with an axial gap control function

A scroll apparatus with an axial gap control function is described. The scroll apparatus is capable of controlling the axial gap between its fixed scroll and orbiting scroll. The scroll apparatus has a frame with a pair of indentations installed in the casing of the scroll apparatus, a pair of flexible elements installed at the lateral side top of the frame and spanning the pair of indentations for defining a suspended flexible segment at the span, a sidewall having a positioning ring with a downward protruding body corresponding to the indentation, in which the protruding body of the positioning ring is fixed to the flexible segment of the flexible element, a fixed scroll suspended at the positioning ring, and an orbiting scroll for orbiting into the fixed scroll.