Patent ID: 8186972
Filing Date: 2012-05-29
Classification: F04B

Abstract:
1. A multi-stage expansible chamber pump system, comprising: first and second pump units ( a high pressure pump unit ( said pump piston ( a direction control valve disposed to receive high pressure air divided into a Control air component and a Process air component; said Control air component effective to dispose said direction control valve alternately in a first valve condition and a second valve condition to direct said Process air component alternately in a sequence wherein the Process air component is directed: a. to said left side high pressure air chamber ( b. to said right side high pressure air chamber ( c. again to said left side high pressure air chamber, to continue the sequence; whereby said pump piston ( 33 ) of the first pump unit, said pump piston ( 43 ) of the second pump unit, and said high pressure pump piston ( 63 ) reciprocate in unison to pump fluid through said fluid chamber ( 32 ) of the first pump unit and said fluid chamber ( 42 ) of the second pump unit.