One-piece spray head and core pin construction therefor

Claim 2

For use on an aerosol dispenser of the type having a hollow tubular valve stem terminating in a tube tip having an annular surface, a one-piece spray head, comprising a body having at its front a spray orifice, and having within its lower end a bore of circular cross section within which such tube tip is received, the bore terminating upwardly in an end surface having a radially outer portion against which a portion of such tube tip annular surface may seat, a flow channel recessed upwardly into said end surface commencing inwardly of its radially outer portion and extending outward to and forwardly along a part of such outer portion, the flow channel having a constriction whose cross-sectional area does not exceed that of the smallest cross section of the spray orifice, whereby, when such tube tip is so seated, to provide thereabove a flow control portion of said channel, together with a circulation chamber in the flow path from said constriction to and immediately before the orifice.

Claim 3

A one-piece spray head as defined in claim 1, wherein the spray orifice converges from a larger orifice inlet portion at the circulation chamber to its said smallest cross section outwardly thereof, whereby its convergence aids in inducing rapid vortex flow from the circulation chamber to and through the orifice.

Claim 4

A one-piece spray head as defined in claim 2, wherein the spray orifice diverges forwardly of its portion of smallest cross section, whereby to control the angle at which spray is emitted from the orifice.

Claim 5

For use on an aerosol dispenser of the type having a hollow tubular valve stem terminating in a tube tip having an annular surface, a one-piece spray head, comprising a body having at its front a spray orifice, and having within its lower end a bore of circular cross section within which such tube tip is received, the bore terminating upwardly in an end surface having a radially outer portion against which a portion of such tube tip annular surface may seat, a flow channel recessed upwardly into said end surface commencing inwardly of its radially outer portion and extending outward to and forwardly along a part of such outer portion, a throat connected to the forward end thereof and extending upwardly, and a circulation chamber at the upper end of said throat, the circulation chamber having the general configuration of a disk whose thickness tapers narrowingly upward, said circulation chamber being positioned laterally of the body, its thickness at its lower portion being substantially greater than that of the throat, such excess thickness projecting forward from the throat, the chamber having a generally circular forward face, together with a spray orifice located below center of said forward face and leading outward forwardly from the thickened lower portion of the circulation chamber.

Claim 6

For use on an aerosol dispenser of the type having a hollow tubular valve stem terminating in a tube tip having an annular surface, a one-piece spray head, comprising a body having at its front a spray orifice, and having within its lower end a bore of circular cross section within which such tube tip is received, the bore terminating upwardly in an end surface having a radially outer portion against which a portion of such tube tip annular surface may seat, a flow channel recessed upwardly into said end surface commencing inwardly of its radially outer portion and extending outward to and forwardly along a part of such outer portion, a throat connected to the forward end thereof and extending upwardly, and a circulation chamber at the upper end of said throat, the circulation chamber having the general configuration of a disk whose thickness tapers narrowingly upward, said circulation chamber being positioned laterally of the body, its thickness at its lower portion being substantially greater than that of the throat, such excess thickness projecting forward from the throat, the chamber having a generally circular forward face, together with a spray orifice located below center of said forward face and leading outward forwardly from the thickened lower portion of the circulation chamber.

Claim 7

A one-piece spray head as defined in claim 4, wherein the flow channel enters into the throat from one side of center of said laterally positioned chamber and the orifice joins the circular forward face at a position spacedly to the same side of center of said face, whereby inflow from the throat circulates first to that side of the chamber opposite to the flow channel and thence upwardly, around and downwardly forwardly to the region of the orifice at said first side of center, thereby avoiding intermixing the inflow with the vorticity induced at the orifice.

Claim 8

A one-piece spray head as defined in claim 4, wherein the circulation chamber has side portions converging toward the forward face.