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US 5,344,120 AGranted
Airless spray gun needle assembly
AssigneeGraco Inc.
InventorsJimmy W. S. Tam, Lawrence L. Lanerd, Albert W. Lubenow, Tera D. McCutcheon
Life of this patent
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Abstract
A needle assembly for an airless spray gun is provided with a needle which is centerless ground and electropolished to greatly increase life. Further life enhancements are gained by use of a plastic needle bushing in the needle clamp and provision of a specific length to diameter geometry for the needle yields enhanced life as well.
Claims4
A needle assembly for an airless spray gun, said needle assembly comprising:
- a needle;
- having first and second ends and a sealing area, said needle having a centerless ground and electropolished surface, said needle being plated on one of said ends and unplated on the other of said ends;
- a needle retainer retaining said needle first end;
- and
- a ball retainer containing said needle second end.
2 more elements
Dependencies are inferred from the claim text.