MULTIPLE COMPONENT METERING AND DISPENSING SYSTEM

摘要

A plural component pumping apparatus including a piston and cylinder fo r each component to be pumped. Reciprocation of the piston in the cylinder dra ws the component into the cylinder during an intake stroke of the pumping apparatus and exhausts the material from the cylinder during an exhaust stroke of the pumping apparatus. Intake and exhaust valves are provided into the cylinder. Each of the intake and exhaus t valve includes a housing oriented outside the cylinder to facilitate repair or replacement of the valves. A pumping motor on each side of the cylinder is coupled to a support and to th e piston to move the support and piston relatively toward each other during the exhaust strok e and relatively away from each other during the intake stroke. A position indicator is coupl ed to the pumping motor. The pumping motor controls sense the position of the position indicator.