초록 ▼

A dispensing system for dispensing chemical products to a plurality of utilization points utilizes a multi-port valve to selectively deliver use dilutions from a mixing apparatus to selected utilization points. The multi-port valve utilizes a position sensor to provide positive proof-of-delivery by

A dispensing system for dispensing chemical products to a plurality of utilization points utilizes a multi-port valve to selectively deliver use dilutions from a mixing apparatus to selected utilization points. The multi-port valve utilizes a position sensor to provide positive proof-of-delivery by detecting the angular position of a rotor relative to a stator in the valve. The position sensor includes opposing annular arrangements of detectable elements and proximity detectors which rotate relative to one another about a common axis in response to rotation of the rotor such that detectable elements are oriented in proximity to a unique combination of proximity detectors at each of a plurality of predetermined angular positions. As a result, unique codes are output from the proximity detectors to positively identify positioning of the rotor at the predetermined angular positions.

대표청구항 ▼

[ What is claimed is:] [1.] A dispensing system for dispensing chemical products to a plurality of utilization points, the system comprising:(a) a mixing apparatus, coupled to a source of diluent and a plurality of sources of chemical products, the mixing apparatus outputting a use dilution having a

[ What is claimed is:] [1.] A dispensing system for dispensing chemical products to a plurality of utilization points, the system comprising:(a) a mixing apparatus, coupled to a source of diluent and a plurality of sources of chemical products, the mixing apparatus outputting a use dilution having at least one of the plurality of chemical products mixed with diluent;(b) a multi-port valve having an input in fluid communication to receive a use dilution from the mixing apparatus and a plurality of outputs coupled to the plurality of utilization points, the multi-port valve being movable between a plurality of positions, each position coupling the input to one of the plurality of outputs; and(c) a controller, coupled to the mixing apparatus and the multi-port valve, for selectively dispensing a use dilution to one of the plurality of utilization points.