The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 22, 1985
Filed:
Nov. 29, 1984
Irwin A Hicks, Radnor, PA (US);
Donald C Ruddy, Willow Grove, PA (US);
Other;
Abstract
A gas seal between two relatively moving parts is produced by coating one of the parts with epoxy resin which is then dusted with microspheres having widely varying diameters. The microspheres are concentrated near the surface of the resin and held in place by a wicking action of the resin on the surface of the microspheres. When the two parts are assembled and moved relative to each other, the microspheres near the surface are broken away to a level which provides a close tolerance gas seal between the two moving parts. The broken microspheres create pockets which aid in the sealing process because they provide a change from laminar flow to turbulent flow in the sealing area.