Compressor piston and method for coating piston
AssigneeKabushiki Kaisha Toyoda Jidoshokki Seisakusho
InventorsTakayuki Kato, Takahiro Sugioka, Shigeo Fukushima
Life of this patent
Estimating the term…
Abstract
A compressor piston that smoothly slides in a cylinder bore and a coating method for manufacturing such pistons. Coating material is applied to a piston to form a coating layer. The principal components of the material include fluororesin and a binder. The coating layer is not ground. Therefore, fluororesin, which migrates to the surface of the coating layer, is not removed by grinding, which permits the piston to resist friction.
Claims16
A piston for reciprocating in a cylinder bore of a compressor, comprising:
- a head for contacting a wall of the cylinder bore;
- and
- a coating layer formed on an outer surface of the head, the coating layer including fluororesin and a binder, wherein a surface of the coating layer has a relatively high concentration of the fluororesin for reducing friction when the piston reciprocates.
A method of coating a compressor piston using a transfer member, a coating material that includes fluororesin and a binder, the coating material being applied to an outer surface of a head of the piston, the method comprising separating the piston and the transfer member instantaneously when the coating material has been applied to the entire circumference of the head.
Dependencies are inferred from the claim text.