Back to results
US 5,333,536 AGranted
Piston and method of manufacture
OwnerLawrence F. Yudainventor
Life of this patent
Estimating the term…
Abstract
A piston and method of manufacture is disclosed wherein a low friction plastic material D is sprayed upon a molded cylindrical metallic member, having a single intermediate annular groove C, forming a coating having wear surfaces A and B on each side of the groove, and a sealing ring E carried in the annular groove.
Claims3
The method of manufacturing a piston having a cylindrical outer wear surface on each side of an annular groove and an axial bore therethrough for receiving a piston rod comprising the steps of:
- suspending a plurality of cylindrical metallic members in stacked relation upon a rod passing through respective axial bores of said cylindrical metallic members;
- treating an outer surface of each of said cylindrical metallic members, each of said members including said surfaces and said annular groove, for receiving a spray of plastic material;
- spraying said plastic material on said outer surface after so treating said outer surface and while so suspending said cylindrical members in stacked relation upon said rod forming a coating defining spaced wear surfaces;
- and
- hardening in situ said plastic material on said outer surface while so suspending said cylindrical members in said stacked relation upon said rod.
2 more elements
Dependencies are inferred from the claim text.