Patent Number: 6,168,308

Title: Mechanical proportioner

Abstract: A mechanical proportioner is provided with two pump lowers which are connected together by a yolk underneath an air-operated reciprocating piston pump. The pumps are staggered axially so as to enable overlapping of certain portions thereof thereby enabling the center-to-center distance to be minimized. The mix manifold is constructed in a concentric fashion such that mixed material does not come into contact with the mix manifold until it enters the static mixer at the exit of the manifold which is an easily disposable and replaceable part. The purge solvent valves on the mix manifold are each provided with an extension of their respective handles. If either purge valve is in its open position, a separate interlock handle operating the A and B side valves at the manifold inlet is prevented from opening. Similarly, if the interlock handle operating the A and B side valves is open, the purge valves cannot be opened.

Inventors: Pittman; David M. (Brooklyn Park, MN), Lehrke; Kenneth E. (Maple Grove, MN), Isais; John F. (Brooklyn Park, MN), Peterson; Vicky J. (Brooklyn Center, MN), Friedrich; Adam R. (St. Paul, MN)

Assignee: Graco Minnesota Inc.

International Classification: B01F 15/04 (20060101); B01F 015/02 ()

Expiration Date: 01/02/2018