Other

William B McCall

William P Harper

William J Harper

A pure rotary positive displacement device includes a rotatably mounted circular cylindrical housing having an even number of equiangularly spaced, radial cylinders formed therein. A rotatably mounted piston carrier rotates in synchronization with the cylinder housing and supports at least one piston for movement within the cylinders. The central axis of the piston carrier is offset from the central axis of the cylinder housing, and each piston is spaced from the central axis of the piston carrier by the offset between the rotational axes of the piston carrier and the cylinder housing. The pistons and cylinders preferably have congruent conjugate surfaces to reduce leakage between the pistons and the cylinders, and the pistons are rotatably mounted to the piston carrier. The number of pistons is typically one-half the number of cylinders, and if multiple pistons are used, then they are spaced equiangularly about the piston carrier. When the device is designed to function as a pump or as a compressor, a fluid to be pumped or compressed is admitted to the cylinder housing and is forced from each cylinder as a piston advances toward the distal end thereof. A stationary cylinder head forms a sliding seal with the arcuate peripheral surface of the cylinder housing to exhaust fluid pumped, expanded or compressed by the pistons.

Pure rotary positive displacement device

The disclosure relates to a rotary machine, the basic elements of which are generically adapted for use as a two-stage pneumatic compressor or as a four-cycle combustion engine or as a two-cycle combustion engine. The basic combination of elements of the machine comprises a plurality of rotors rotatably mounted on axes disposed at substantially right angles to each other and wherein the rotors are provided with peripheral portions having inwardly notched or recessed chamber portions which are disposed between alternate radially extending lobe portions. The lobe portion of each rotor adapted to pass into a respective recess chamber portion of another rotor in an intersecting area and means is provided to rotate the rotors in timed relationship with each other; each rotor having a central air compressor inlet disposed near its respective rotary axis and having outwardly directed centrifugal compressor blade means extending from the generally central inlet to the peripheral portions of the respective lobes at which each lobe is provided with a compressor outlet; a housing for said rotors comprising an air receiving plenum communicating with the periphery of each rotor for receiving compressed air from the outlets of said centrifugal compressor outlets of the lobes; each plenum extending an arcuate distance sufficient to provide for supercharging of each of said recess chamber portions as they pass the respective air receiving plenum in the housing. The disclosure also relating to specific details of the foregoing combination of elements as they relate to four-cycle combustion engines; two-cycle combustion engines and two-stage compressors, all of which combine centrifugal air compression with second stage positive compression and further the disclosure relates to regenerative heat exchange or intercooling respectively related to the combustion engine species and the compressor species.

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Novato, CA, United States of America

William B McCall