Robert C Ucman

US Patent:

20050092961, May 5, 2005

Filed:

Oct 31, 2003

Appl. No.:

10/699282

Inventors:

Robert Ucman - Haslett MI, US

International Classification:

F16K001/00

US Classification:

251337000, 137375000, 123188300

Abstract:

A lightweight valve spring retainer with a wear resistant spring seat or seats is provided. The spring seats may be defined in part by a tungsten carbide layer.

US Patent:

20060118177, Jun 8, 2006

Filed:

Nov 30, 2005

Appl. No.:

11/289846

Inventors:

Robert Ucman - Haslett MI, US

International Classification:

F16L 7/00

US Classification:

137375000

Abstract:

A method of making a valve for use in a combustion engine includes forming a valve core of a titanium material, the valve core including a head and an elongated stem extending away from the head with a curved region connecting the head and the elongated stem. The elongated stem includes a central guide region that is substantially uniform in outer dimension and free of any undercut. Surface portions of the valve core are finished to a suitable roughness average, the finishing occurring at least in the central guide region of the elongated stem. A coating process is used to apply and bond a multi-layer coating to finished surface portions of the valve core including the central guide region of the elongated stem.