Slippers for rollers in a roller vane pump
AssigneeSauer-Danfoss Inc.
InventorKevin J. Landhuis
Life of this patent
Estimating the term…
Abstract
A roller vane pump that uses slippers on its rollers to create multiple seals. The roller vane pump has a fixed cam ring that has a rotor within. The rotor has openings that receive rollers that rotate about the inside of the cam ring. Each roller has a slipper rotatably connected thereto. The use of the slipper allows multiple seals to be created between the slipper, the rollers, and the cam ring and additionally allows for the roller vane pump to rotate clockwise or counterclockwise without the changing of parts.
Claims11
A roller vane pump having a cam ring having inner and outer surfaces comprising:
- a rotor having a face with a center opening and a plurality of spaced apart openings adjacent the inner surface of the cam ring;
- at least one slipper element partially and slidably surrounding a roller, wherein the slipper surrounds at least 180 degrees of the roller;
- wherein only the slipper element and the roller are positioned within the spaced apart opening to distribute a pressure load on the rotor face and
- wherein the coefficient of friction between the slipper and the roller is less than the coefficient of friction between the roller and the cam ring so that the roller rotates against the cam ring.
A roller vane pump having a fixed cam ring, a rotor having a rotor face, and elongated cylindrical rollers within the rotor, the improvement comprising:
- at least one elongated slipper element having a front, back, and top partially and slidably surrounding an elongated cylindrical body of a roller to distribute a pressure load on the rotor face;
- wherein only the slipper element and roller distribute a pressure load on the rotor face, and
- wherein the coefficient of friction between the slipper and the roller is less than the coefficient of friction between the roller and the cam ring so that the roller rotates against the cam ring.
Dependencies are inferred from the claim text.