Patent ID: 8353207
Filing Date: 2013-01-15
Classification: G01F

Abstract:
1. A fluid meter comprising: a housing defining at least one crankcase and two axially-aligned cylinders; a crankshaft disposed in the crankcase; two pistons respectively mounted in the cylinders for reciprocal movement; a first connecting rod connected to one of the pistons and to the crankshaft for rotating the crankshaft in response to the movement of the one piston; and a second connecting rod connected to the other piston and to the crankshaft for rotating the crankshaft in response to the movement of the other piston, the first and second connecting rods having yoke slots for receiving a crank pin the connecting rods being connected to the crankshaft by one common crank pin that is radially offset from the crankshaft, the fluid meter being arranged such that an axis through the endpoints of the yoke slot of one connecting rod forms an angle alpha with the alignment axis of the two axially aligned cylinders, and an axis through the endpoints of the yoke slot of the other connecting rod forms another, different angle beta with said alignment axis, so that the corresponding pistons reciprocate out of phase.