Graco Inc.

Thomas J Schaefer

Tera D McCutcheon

Timothy L Mullen

Calvin S Hulburt

Scott A Olson

A nozzle for use in a foam gun is designed so that the ports for the two materials both enter the flow passage in the same plane. This serves to eliminate lead/lag flow conditions which result in portions of the material being off-ratio. Counterbored or milled slots encircle the angled sealing surface with the slots machined in from alternating edges of the surface communicating with the respective flow passages for the two (or more) materials.

Planar foam nozzle

Foam gun

The reciprocating pump shaft is joined to a reciprocating motor shaft by the coupling of this invention. The pump shaft is provided with a knob-like end having a chamfered angle between the knob and a reduced diameter section adjacent the knob. A two piece annular collar that's about the chamfered shoulder and the reduced diameter section and the collar is provided with a chamfered shoulder having a slight angular mis-match with the shaft shoulder. A nut draws the pump shaft upwardly against the end of the motor shaft and is tightened to the point where the pre-load between the two shafts is greater than the alternating load imposed by the motor.

Reciprocating pump coupling

A plural component dispensing nozzle having internal passages for the introduction of at least two components for mixing and dispensing, and having a one piece mixing chamber with impingement orifices axially spaced along the chamber, and having formed as a part thereof sealing flanges to develop the fluid flow passages into the mixing chamber, and to provide an isolation seal between the plural components as well as fluid seals between the flow passages and the nozzle.

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Buffalo, MN, United States of America

Thomas J Schaefer