Patent ID: 7547201
Filing Date: 2009-06-16
Classification: B29C,B29L,F04B

Abstract:
1. A compact simplified compressor apparatus comprising: a rotating shaft rotationally driven by a motor; a compact compressor provided with a rod attached to the rotating shaft via a crank, a piston having a peripheral groove in an outer peripheral surface thereof and arranged in an end of said rod, a cylinder having a cylinder chamber receiving the piston so as to freely reciprocate, and a ring seal sealing between said piston and an inner peripheral surface of the cylinder chamber; an air feeding means for feeding a high-pressure air from the compact compressor to a tire; and a power source plug supplying an electricity to said motor, said rod and the piston are formed by an integrally formed body made of fiber reinforced plastics (FRP), said peripheral groove of said piston has a groove wall surface in a rod side and a groove wall surface in an opposite rod side, each extending from each side of a groove bottom surface, said ring seal is provided with a base portion having a base surface seating on said rod side groove wall surface, and inner and outer lip portions, which extend from said base portion radially inwardly and outwardly, respectively, so as to be opened toward the opposite rod side, in a free state in which said ring seal is not attached to said peripheral groove, said groove wall surface in said non-rod side of said peripheral groove and said groove wall surface in said rod side are inclined so as to increase a groove width toward an outer side in a radial direction, and angles α said groove bottom surface is in parallel to a central axis of the piston, and said base surface of the ring seal is at a right angle with respect to the central axis of the ring seal in said free state.