Patent ID: 8419396
Filing Date: 2013-04-16
Classification: F02M,F04C

Abstract:
1. A vane pump comprising: an electric motor that includes a mount portion; a rotor that includes a plurality of vanes and is adapted to be rotated together with the plurality of vanes by a rotational drive force of the electric motor; an upper casing that rotatably receives the rotor and includes: a lower casing that includes: a resilient sheet that is placed between the lower casing and the mount portion and includes a tertiary through hole at a location, which corresponds to the secondary through hole; and a screw member that is received through the primary through hole, the secondary through hole and the tertiary through hole to securely connect the upper casing, the lower casing and the resilient sheet to the mount portion, wherein: at least one of two opposed surfaces of the resilient sheet, which are opposed to each other in a direction perpendicular to a plane of the resilient sheet, includes a plurality of primary protrusions; a secondary protrusion is formed in the at least one of the two opposed surfaces of the resilient sheet and is configured to circumferentially extend all around an entire peripheral edge of an opening of the tertiary through hole; and the secondary protrusion has a projecting height that is generally the same as a projecting height of each of the plurality of primary protrusions.