Patent ID: 6264442
Filing Date: 2001-07-24
Classification: F04B

Abstract:
A positive displacement pump comprising, in combination.a pair of cylinders disposed in parallel each having a sidewall and a head,a pair of pistons received in a respective one of said pair of cylinders,a crankshaft having a pair of cranks for driving a respective one of said pair of pistons,a plurality of rotary inlet valves disposed adjacent said cylinder sidewalls, said inlet valves having at least a first port and a second port oriented at 90.degree. to said first port, a cam, a follower acted upon by said cam and a drive linkage operably disposed between said first follower and said plurality of rotary inlet valves, anda pair of rotary outlet valves disposed adjacent a respective one of said pair of cylinder heads in fluid communication with a respective one of said cylinder.