Rotary expansible chamber devices – Non-metallic working member – cylinder or partition – Resilient
Patent
1975-01-31
1976-08-24
Vrablik, John J.
Rotary expansible chamber devices
Non-metallic working member, cylinder or partition
Resilient
418268, F01C 502, F03C 300, F04C 500
Patent
active
039764087
ABSTRACT:
A positive-displacement fluid driven motor for use with down-hole drilling tools includes a cylindrical housing having a bore in which is mounted a rotor having folding blades mounted thereon with a peripheral space therebetween. Separators on the walls of the bore separate the space into a plurality of fluid chambers having inlet ports at the trailing ends of the separators. Discharge ports are located a short distance from the leading ends of the separators. Each blade is supported at its center of pressure to limit the outward angular displacement of the blade and transmit the driving force to the rotor and also minimize binding of the blade due to the effects of the fluid pressure. The operative part of each blade is capable of limited inward linear movement in its direction of width against its inherent elasticity to accommodate imperfections in the walls of the bore and particles of grit or sand at its sealing edge to minimize wear.
REFERENCES:
patent: 2636478 (1953-04-01), Smyser
patent: 2738775 (1956-03-01), Smyser
patent: 2753809 (1956-07-01), Garrison
patent: 2882868 (1959-04-01), Smyser
patent: 3594106 (1971-07-01), Garrison
Dropkin Robert F.
Empire Oil Tool Company
Gioia Vincent G.
Vrablik John J.
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