Variable displacement sliding vane pump/hydraulic motor
OwnerCletus M. Geigerinventor
Life of this patent
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Abstract
This invention, a variable displacement sliding vane pump/hydraulic motor, incorporates an eccentric chamber in which a rotor with a plurality of axially and radially moveable sliding vanes rotates. Axial positioning of the sliding vanes is accomplished by positioning a sliding wall; the swept volume and therefore the capacity of this invention is also directly related to the positioning of the sliding wall. This sliding wall can be positioned by external means including conventional manual and automatic devices. Various embodiments permit pumping capacity variability from essentially zero flow to full flow without the use of bypasses.
Claims9
A variable displacement sliding vane pump/hydraulic motor comprising:
- a. a housing which forms an eccentric chamber and a contiguous concentric chamber and contains a fluid inlet port and a fluid outlet port,
- b. a sliding wall which sits slideably inside said eccentric chamber and which contains a rotor chamber which is concentric with said concentric chamber,
- c. a rotor assembly comprising a hub which fits rotatably inside said concentric chamber and a rotor which fits rotatably inside said rotor chamber, and which contains a plurality of radial slots,
- d. a shaft which is attached concentrically to said rotor assembly,
- e. a plurality of sliding vanes which slideably fit into said radial slots in said rotor assembly,
- f. tensioning means which impress said sliding vanes outward in radial direction,
- g. lateral tensioning means which impress said sliding vanes in a direction parallel to the center line of said rotor assembly,
- h. end plates which enclose the ends of said housing to prevent fluid loss therefrom, and
- i. a means to slideably position said sliding wall within said eccentric chamber.
Dependencies are inferred from the claim text.