Powder spray gun with inline angle spray nozzle
First Claim
1. A nozzle for a powder spray gun, comprising:
- a generally hollow nozzle body having a powder passageway therein;
said passageway having a central axis;
at least one slot in said nozzle body that opens to said passageway;
said at least one slot being substantially on one side of a reference plane;
said central axis being coplanar with said reference plane;
whereby powder enters said passageway and is sprayed out said at least one slot to form a spray pattern that is substantially directed away from said reference plane.
1 Assignment
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Accused Products
Abstract
An electrostatic spray gun apparatus includes a spray gun housing and a nozzle attached to a spray end of the housing, and a powder path that extends in a substantially straight line along an axis of the housing from the powder inlet to the powder outlet. The powder path is in the form of an enclosed smooth powder passage that is substantially continuous and uninterrupted from the powder inlet to the powder outlet to eliminate substantially all recesses or gaps that could capture or trap powder. The powder passage is formed by a plurality of tubular segments that are aligned along the housing axis and abut end to end. that when assembled in the housing axially compress the segments together to substantially eliminate dead spots or recesses to form the continuous smooth powder path. A gun purge function is provided that allows a purge line to be installed on the gun assembly. A cartridge valve and conductor assembly is provided between the gun electrode in the nozzle and the output of the voltage multiplier. The cartridge includes a conductive path to provide electrical continuity from the multiplier to the gun electrode, and also includes valve, preferably in the form of a stem check valve, that closes when the gun electrode is removed or at least unseated from the nozzle. The gun also includes a tube mount arrangement wherein the tube mount is rigidly held together with the gun housing in axial compression by a tie bar. The gun may further include a nozzle that provides a directional spray pattern to one side of the nozzle thereby allowing the gun to easily spray non-vertical surfaces.
50 Citations
26 Claims
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1. A nozzle for a powder spray gun, comprising:
a generally hollow nozzle body having a powder passageway therein;
said passageway having a central axis;
at least one slot in said nozzle body that opens to said passageway;
said at least one slot being substantially on one side of a reference plane;
said central axis being coplanar with said reference plane;
whereby powder enters said passageway and is sprayed out said at least one slot to form a spray pattern that is substantially directed away from said reference plane.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A powder spray gun, comprising:
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a spray gun housing;
a nozzle assembly mountable on said gun housing;
said nozzle assembly including a nozzle anda powder feed tube that slideably inserts into a back end of said nozzle;
said nozzle having a generally hollow nozzle body with a powder passageway therein;
said passageway having a central axis;
at least one slot in said nozzle body that opens to said passageway;
said at least one slot being substantially on one side of a reference plane;
said central axis being coplanar with said reference plane;
whereby powder entering said passageway is sprayed out said at least one slot to form a spray pattern that is substantially directed away from said reference plane. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A spray nozzle for an electrostatic powder spray gun, said nozzle comprising:
a generally hollow nozzle body having a powder passageway therein;
said passageway having a central axis;
three slots in said nozzle body that each open to said passageway;
each said slot being substantially on one side of a reference plane that is coplanar with said central axis;
whereby powder enters said passageway and is sprayed out said slots to form a spray pattern that is substantially on only one side of said reference plane.
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25. A spray nozzle for an electrostatic powder spray gun, said nozzle comprising:
a generally hollow nozzle body having a powder passageway therein;
said passageway having a central axis;
three slots in said nozzle body that each open to said passageway;
a central opening in said nozzle body that is coaxial with said central axis and that receives one end of an electrode when said nozzle is assembled onto an electrostatic corona spray gun;
each said slot being substantially on one side of a reference plane that is coplanar with said central axis;
whereby powder enters said passageway and is sprayed out said slots to form a spray pattern that is substantially directed at an angle away from one said electrode.- View Dependent Claims (26)
Specification