Rolling piston type rotary machine with discharge passage in van

Details Rolling piston type rotary machine with discharge passage in van Rolling piston type rotary machine with discharge passage in van

1987-03-30

1988-12-27

Vrablik, John J.

Rotary expansible chamber devices

Working member has planetary or planetating movement

With relatively movable partition member

418251, F01C 1356, F01C 2100

Patent

active

047937807

ABSTRACT:
A rotary piston vacuum pump has a rotor eccentrically disposed in a cylinder and mounted therein for revolution in rolling contact with the cylindrical inner peripheral surface of the cylinder so that a crescent-shaped space is defined between the rotor and the cylinder and moved around the axis of the cylinder. A vane is radially reciprocally mounted in a vane chamber having an inner end open to the cylindrical inner peripheral surface of the cylinder. The vane has an inner end in sliding contact with the outer peripheral surface of the rotor to divide the crescent-shaped space into a suction chamber in communication with a suction port and a discharge port to be communicated with a discharge port having an inner end open in a wall of an outer part of the vane chamber. The rate of communication between the discharge port and the discharge chamber through the outer vane chamber part is varied by the reciprocal movement of the vane so that the communication is interrupted at least when the point of contact between the rotor and the cylinder inner peripheral surface reaches the vane.

REFERENCES:
patent: 1054210 (1913-02-01), Kinney
patent: 1623378 (1927-04-01), Bavington
patent: 1681583 (1928-08-01), Guttner
patent: 1685397 (1928-09-01), Carrey

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