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:
Sep. 28, 1999
Filed:
Nov. 05, 1998
Bradley C Erickson, Clarkston, MI (US);
Jerry A Sowik, Livonia, MI (US);
David C Mills, Clinton Township, MI (US);
Borg-Warner Automotive, Inc., Troy, MI (US);
Abstract
A solenoid operated control valve (10) including a housing (16) that defines an internal chamber (34) therein, where an electromagnetic coil (44) is coaxially mounted within the internal chamber (34). A tubular shaped movable armature (60) is positioned within the internal chamber (34). An armature spring (72) biases the armature (60) to a first position within the internal chamber (34) when the coil (44) is not energized, and the armature (60) moves to a second position against the bias of the spring (72) when the coil (44) is energized. The armature (60) contacts a first armature stop (76) when it is in the first position and contacts a second armature stop (92) when it is in the second position. Both the first and second armature stops (76, 92) include radially extended protrusions (100) in order to minimize hydraulic tension. A valve body (64) is disposed within a center bore (62) of the armature (60) and includes openings (122, 124) that align with a side aperture (106) in the armature (60) to control fluid pressure between a supply port (30), a control port (136), and an exhaust port (30).