Kui Chiu Kwok

age ~74

from Eden Prairie, MN

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Nozzle For Hydrostatic Fluid Tip
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US Patent:

43867391, Jun 7, 1983
Filed:

Dec 18, 1981
Appl. No.:

6/332089
Inventors:

Kui C. Kwok - Arden Hills MN
Assignee:

Graco Inc. - Minneapolis MN
International Classification:

B05B 708
US Classification:

239296
Abstract:

A nozzle for utilization on a spray gun operated for the spraying of pressurized liquids through an elliptical orifice, wherein pressurized air is utilized in conjunction with the invention to enable an improved quality spray at a lower liquid pressure. The nozzle has a pair of air jets on either side of the elliptical orifice, positioned in diametrically opposite equidistant locations, and respectively directed along axes which cause the air jet envelope to tangentially contact the orifice at a point outside the included angle formed by the fan-shaped spray pattern emitted from the orifice.

Spray Gun Air Cap And Method Of Making
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US Patent:

45013942, Feb 26, 1985
Filed:

May 9, 1983
Appl. No.:

6/492840
Inventors:

Kui C. Kwok - Arden Hills MN
Assignee:

Graco Inc. - Minneapolis MN
International Classification:

B05B 128
US Classification:

239296
Abstract:

A spray gun nozzle including a threadably attached cap having a plurality of air passages therein, centered about an axial fluid passage and orifice, including an orifice locating disc affixed in the cap for precisely axially locating the fluid orifice relative to the axis of the air cap and for precisely defining an annular air passage surrounding the orifice. The method includes the steps of simultaneously making the orifice locating hole and the annular air passage in a single drilling operation.

Spray Gun Control Valve
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US Patent:

44260393, Jan 17, 1984
Filed:

Jan 11, 1982
Appl. No.:

6/338424
Inventors:

Kui C. Kwok - Arden Hills MN
Assignee:

Graco Inc. - Minneapolis MN
International Classification:

B05B 712
US Classification:

239415
Abstract:

A control valve for a spray gun which is engageable by a spray gun trigger to release pressurized air and pressurized liquid through the spray gun for spraying in a predetermined sequence. The valve includes a slidable spool axially aligned with a liquid valve and valve seat and connected thereto by an axial valve stem, whereby the slidable spool has a beveled surface thereon, which surface is in contact with a second valve stem aligned in an air passage in the handle of the spray gun for opening and closing an air valve therein. The valve mechanism is actuated by trigger movement, first to open the air valve and second to open the liquid valve to insure the controlled release of pressurized liquid and air for optimum spraying conditions.