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:
May. 15, 2001
Filed:
Oct. 22, 1998
Uri Bin-Nun, Keene, NH (US);
Daniel L. Manitakos, Peabody, MA (US);
Inframetrics Inc., North Billerica, MA (US);
Abstract
A method for forming a mating piston and cylinder sleeve wherein the piston includes an outer diameter and a cylinder sleeve includes a bore for receiving the piston therein and wherein the piston outer diameter and the bore each form bearing surfaces having a gas film maintained in a gap therebetween. The method includes the steps of coating the piston outer diameter with a layer of PTFE based composite material and then diamond turning the piston outer diameter to a final piston diameter. The cylinder wall is also coated with a PTFE based composite layer which may be deposited by an electroless nickel plating process. The cylinder longitudinal bore is then diamond turned to a cylinder final diameter for mating with the piston final diameter.