Rotary pistons

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2006-10-10

2006-10-10

Nguyen, Hoang (Department: 3748)

Rotary expansible chamber devices

Positively actuated vane

Fluid biased

C418S260000

Reexamination Certificate

active

07118361

ABSTRACT:
A rotary piston for use in pumps or motors, the piston having a radially movable vanes seated within the pumps rotor. The vanes are biased outwardly and forced inwardly by a cam action of the interior wall of the housing of the piston. Operation of the piston may be facilitated by the use of peripherally mounted drive gears. The rotary piston according to the present invention is particularly useful in pumping fluids and provides a system that can operate at both high and low speeds for a wide range of liquid viscosities.

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Mechanical Engineering Design; Joseph E. Shigley, Charles R. Mischke, Richard G. Budynas; 2004; McGrawHill; Seventh Edition; pp. 664-665.

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