US 12,085,045 B1
Low stiction vane pump for evaporative emissions system
Mark William Peters, Wolverine Lake, MI (US); and Trevor Adam Pryor, Galion, OH (US)
Assigned to STONERIDGE CONTROL DEVICES, INC., Novi, MI (US)
Filed by STONERIDGE CONTROL DEVICES, INC., Novi, MI (US)
Filed on Aug. 2, 2023, as Appl. No. 18/364,098.
Int. Cl. F02M 25/00 (2006.01); F02M 25/08 (2006.01)
CPC F02M 25/0836 (2013.01) 12 Claims
OG exemplary drawing
 
1. A vane pump comprising:
a housing providing a bore in fluid communication with an inlet passageway and an outlet passageway;
a rotary assembly arranged within and configured to rotate relative to the bore;
the rotary assembly including:
a rotor mounted to a shaft and having multiple slots, the rotor having a first and second faces engaging the housing;
a vane received in each of the slots, each vane having first and second surfaces extending a length in a longitudinal direction from a first end portion to a second end portion, the first end portion received in its respective slots; and
wherein the rotary assembly includes a recess on at least one of the first face, the second face, the first surface of the first end portion, and the second surface of the first end portion, wherein multiple recesses are provided on each vane.