Rotary pistons
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United States of America Patent
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-
Oct 10, 2006
Grant Date -
Nov 17, 2005
app pub date -
May 14, 2004
filing date -
May 14, 2004
priority date (Note) -
In Force
status (Latency Note)
Importance
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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