Patent ID: 7481633
Filing Date: 2009-01-27
Classification: F03C,F04C

Abstract:
1. A gerotor device comprising: a stator having n+1 lobes; a rotor having n teeth, the rotor teeth and the stator lobes cooperating with one another to define expanding and contracting fluid pockets as the rotor rotates and orbits with respect to the stator, each tooth being divided by an axis and including a first inner recess formed in a peripheral surface on a first side of the axis, a second inner recess formed in a peripheral surface on a second side of the axis, a first outer recess formed in a peripheral surface on the first side of the axis, a second outer recess formed in a peripheral surface on the second side of the axis, wherein each edge of each recess is generally defined by a respective line of action; and wherein at least one of the first and second inner recess being configured to permit fluid communication between the maximum volume transition pocket and an adjacent expanding fluid pocket as the maximum volume transition pocket approaches maximum volume and at least one of the first and second outer recess being configured to permit fluid communication between the minimum volume transition pocket and an adjacent contracting fluid pocket as the minimum volume transition pocket approaches minimum volume.