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. 08, 2002
Filed:
Oct. 05, 2001
Russell Modien, Chatham, CA;
Siemens Automotive Inc., Chatham, CA;
Abstract
An automotive emission control valve, such as an EGR valve, has a solenoid for operating a valve element. The solenoid has a stator and an armature. A pole piece of the stator is cooperatively associated with a wall of the armature and comprises a channel that is annular about, and concentric with, a centerline of armature motion. In radial cross section the channel is defined by radially inner and outer walls that form an open throat for the channel, allowing an end portion of the armature wall to move within the channel as the armature is displaced along the centerline. Various constructions for the inner and outer walls are disclosed, including tapers for both walls.