Rotary expansible chamber devices – Intermittently accelerated and receding members rotate in... – Each a working member
Patent
1975-03-17
1977-01-04
Vrablik, John J.
Rotary expansible chamber devices
Intermittently accelerated and receding members rotate in...
Each a working member
F01C 100, F03C 300, F04C 100
Patent
active
040009599
ABSTRACT:
A free-piston bi-directional rotary device is described particularly useful as a compact, low-RPM, high-torque hydraulic motor, but which may also be useful for other applications such as rotary pumps, rotary engines, and the like. The rotary device comprises a stator, a rotor mounted coaxially for rotary movement with respect to the stator and spaced radially therefrom to define an annular gap therebetween, and a plurality of pistons movable within the annular gap in a circumferential direction. Each of the pistons is formed with a slot, and a coupling bar is disposed within the slot and is shiftable radially from a first position coupling the piston to the stator, to a second position coupling the piston to the rotor. The positioning means includes a hydraulic distributor which controls the flow of a pressurized fluid to the coupling bars in timed relationship to the rotation of the rotor, such that the bars are alternately coupled to the stator and to the rotor, to form alternating expansible and contractable chambers between successive pistons as the rotor rotates with respect to the stator.
REFERENCES:
patent: 830124 (1906-09-01), Weeks
patent: 2367676 (1945-01-01), Griffith
patent: 3304921 (1967-02-01), Prochazka et al.
Barish Benjamin J.
Vrablik John J.
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