Patent attributes
A flow meter includes a meter body defining a cavity having opposing ends joined by opposed sides at corners. At least one of the corners is recessed to form a reservoir. A box frame defining a frame interior is received in the cavity for reciprocal movement between the cavity ends. A sliding block defining a circular cavity is received in the frame interior for reciprocal movement therein said frame interior. A valve disc is received in the circular cavity for rotational movement therein. The valve disc includes an eccentric hole formed therethrough. A shaft extending through the eccentric hole is rotatably fixed to the valve disc. Fluid flowing through the flow meter reciprocally moves the box frame and sliding block to rotate the valve disc and the shaft.