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:
Jan. 01, 1991
Filed:
Jan. 04, 1989
Applicant:
Inventor:
Knut Enke, Johannesberg, DE;
Assignee:
Leybold Aktiengesellschaft, Hanau I, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02F / ; B05D / ;
U.S. Cl.
CPC ...
92261 ; 92223 ; 427 38 ; 427 39 ;
Abstract
On a machine element of a metallic material, for example, a piston or a piston rod (7, 7') for a shock absorber for a motor vehicle, with at least one hard-material coating deposited on the machine element, the hard-material coating essentially consists of an alloy of silicon and carbon, preferably of Si.sub.x C.sub.1-x, x having a value of from 0 to 1. The deposition of the hard-material coating occurs on the cathode or the anode of a plasma CVD unit at a pressure of the gas or gas mixture in the deposition chamber (1) of between 10.sup.-4 and 20 millibars.