Patent ID: 8011345
Filing Date: 2011-09-06
Classification: F01C,F04C

Abstract:
1. An energy transfer machine, comprising: a carrier secured within an annular housing, the annular housing having inward projections, the annular housing and carrier rotating in relation to each other; at least one inner rotor secured for rotation about an inner rotor axis within the carrier, the inner rotor having outward projections; the inward projections projecting inward and the outward projections projecting outward to mesh with each other and define variable volume chambers between the inward projections and the outward projections as the inner rotor rotates within the carrier during operation; the outward projections of the inner rotor being circumferentially expandable under radially inward pressure; and fluid transfer passages on at least one of the annular housing and carrier to permit flow of fluid into and out of the variable volume chambers.