Indexed positive displacement rotary motion device

摘要

Disclosed herein is an indexing system for a rotor assembly where in one example the indexing system regulates the rotational location of drive rotors. In one example the rotors are configured to rotate about a shaft.

主权项

1. A rotor assembly comprising first and second opposing rotors having first and second center axes that are offset from co-linear, the rotor assembly comprising:
each rotor comprising one or more lobes, the lobes having offset engagement surfaces configured to engage lobe tips of the opposing rotor(s) the offset engagement surfaces being defined by a reference axis fixed to a center axis of the opposing rotor and rotating the reference axis with respect to the center axis of the offset engagement surface of the opposing rotor whereas a distance from the reference axis to the lobe tip of the opposing rotor plus a distance of a prescribed gap distance or interference fit determines the location of the offset engagement surface; a through shaft passing through the rotors, the through shaft having a center portion in part defining a portion of a sphere, the rotors each having an interior portion forming a portion of a concave spherical surface operatively configured to engage the center portion of the through shaft; an indexing system comprising an index offset surface on the first rotor, an indexer surface mounted to the through shaft where the indexer surface is positioned so as to engage the index offset surface of the second rotor as the first rotor rotates with the through shaft having a center of rotation which is not co-linear as to a center of rotation of the first rotor or second rotor.