Spray tip and method of manufacture
AssigneeGraco Minnesota Inc.
InventorsSteven Dale Becker, Diane Leigh Olson, Craig Joseph Wojciechowski, David John Thompson
Life of this patent
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Abstract
A spray tip comprises a tip body, a tip piece, and a pre-orifice piece. The tip body has a fluid channel along a channel axis (AC). The tip piece is disposed within the fluid channel, and has a stepped, narrowing passage that terminates in an outlet orifice. The pre-orifice piece has an inlet passage, and is disposed within the fluid channel, abutting and immediately upstream of the tip piece. The pre-orifice piece and the tip piece together define a turbulating chamber therebetween.
Claims17
A spray tip comprising:
- a polymer tip body with a channel defined by a polymer material, the channel having an upstream channel diameter and a downstream channel diameter;
- a multi-piece assembly situated along the channel axis, axially captured by the tip body, and embedded in the polymer material which forms the polymer tip body by being circumferentially surrounded and in contact with the polymer material of the tip body such that the polymer material holds the multi-piece assembly within the channel, the multi-piece assembly having an outermost assembly diameter greater than both the upstream channel diameter and the downstream channel diameter, the multi-piece assembly comprising:
- a tip piece having an outlet passage disposed along the channel axis, the outlet passage having an outlet passage diameter and terminating in an outlet orifice configured to spray atomized fluid;
- and
- a pre-orifice piece having an inlet passage disposed along the channel axis upstream of the tip piece, and the inlet passage having an inlet passage diameter;
- wherein the tip piece and the pre-orifice piece together form a turbulating chamber situated along the channel axis and between the inlet passage diameter and the outlet orifice, the turbulating chamber having a turbulating chamber diameter greater than both the inlet passage diameter and the outlet passage diameter.
A method of manufacture for a spray tip, the method comprising:
- fabricating a tip piece with an outlet orifice;
- fabricating a pre-orifice piece with an inlet orifice;
- clamping the tip piece and the pre-orifice piece towards each other in an engaged position;
- injection-molding a tip body about the tip piece, such that the tip body includes a fluid channel to the inlet orifice along a channel axis, and an outlet opening at the outlet orifice along the channel axis.
Dependencies are inferred from the claim text.