Dual lobe, split ring, variable roller vane pump
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Jun 4, 2002
Grant Date -
N/A
app pub date -
Aug 14, 2000
filing date -
Aug 13, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A dual lobe, split ring, variable displacement roller vane pump is provided for supplying an aircraft engine varying amount of fuel. In a preferred application, the pump is used with a gas turbine engine. The pump includes a housing having an inlet and an outlet, a rotor rotatably mounted within the housing and having a plurality of slots, and a plurality of roller vanes operatively mounted within the slots. The pump further includes a pair of port plates mounted on either side of the rotor and two cam segments received around the rotor. The cam segments each have a curvilinear surface for cooperating with the rotor, the port plates, and the roller vanes to define a plurality of pumping chambers. The cam segments are independently movable to create varying volumetric pumping chambers along the curvilinear surface of the cam segments.
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