Patent ID: 6190137
Filing Date: 2001-02-20
Classification: F04B

Abstract:
A reciprocating piston compressor comprising:at least one cylinder;a reciprocable piston disposed in said cylinder;a crankshaft rotatable in both a forward and a reverse direction, said crankshaft having a cylindrical eccentric portion;a latching member pivotally engaged with said crankshaft;a cam disposed about said eccentric portion, said piston operatively connected to said cam, said cam rotatable about said crankshaft eccentric portion between a first cam position corresponding to a first piston stroke length during forward rotation of said crankshaft, and a second cam position corresponding to a second piston stroke length during reverse rotation of said crankshaft; anda spring connected to one of said cam and said crankshaft, the position of said latching member influenced by said spring;wherein, in one of said first and second cam positions, said cam is rotatably locked to said crankshaft eccentric portion by said latching member.