Rotary expansible chamber devices – With supply or exhaust passage in working member – Passage includes vane slot
Patent
1987-04-16
1989-02-21
Vrablik, John J.
Rotary expansible chamber devices
With supply or exhaust passage in working member
Passage includes vane slot
418212, 418267, F03C 222
Patent
active
048060852
ABSTRACT:
A reversible hydraulic motor has a forward and a reverse drive section, each separated by a separating plate. Each section has an outer ring, end plate and inner rotor forming a chamber therebetween. Each rotor has a pair of radial slots, separated by 180.degree., and a piston moveable in each slot. An extension form the outer ring to the rotor divides the chamber and moves the pistons inward into the rotor slots at the end of each revolution. Hydraulic fluid is selectively applied, under pressure, to the desired direction section to the interior space between the rotor slot and the piston during the 180.degree. after the rotor rotates past the extension. Each piston has a fluid path therethrough to allow the provided hydraulic fluid to exit the piston interior space into the chamber in a direction opposite to the desired direction of rotation. This exiting fluid builds up pressure in the chamber and rotates the piston and rotor. A fluid return path is provided in the second 1/2.degree. portion of each revolution to allow the fluid added during the initial 180.degree. of rotation to be returned to the hydraulic pumping system. The return path includes a channel to allow the fluid between the piston and slot to also be returned as the piston is moved inward by the extension. Additional selective return means are associated with the nonselected section to allow a return path for the fluid therein.
REFERENCES:
patent: Re27241 (1971-12-01), Pace et al.
patent: 141710 (1873-08-01), Gibson
patent: 868841 (1907-10-01), Calkins
patent: 2174664 (1939-10-01), Korany
patent: 2435279 (1948-02-01), Hubacker
patent: 2475224 (1949-07-01), Deitrickson
patent: 2514521 (1950-07-01), Shaff
patent: 2910052 (1959-10-01), Osborn
patent: 4604041 (1986-08-01), Hertell et al.
Barron Harry W.
Vrablik John J.
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