Patent ID: 6135008
Filing Date: 2000-10-24
Classification: F16J

Abstract:
A compressor comprising:a crankcase;a crankshaft within the crankcase;a motor for driving the crankshaft;a cylinder communicating with the crankcase; anda piston assembly including,a piston slidingly received within the cylinder, the piston including a work surface including an endwall of the piston and a clamp and a sidewall extending from the endwall toward the crankcase,a piston rod connecting the piston to the crankshaft,a plurality of ports in the sidewall of the piston,a lubricant-scraping ring seated on the endwall of the piston and having a continuous outer edge extending radially outwardly beyond the sidewall;the clamp clamping the lubricant-scraping ring to the endwall and,a compression ring fitted in a circumferential groove on the clamp between the work surface and the lubricant-scraping ring.