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:
Feb. 05, 2002
Filed:
Jun. 30, 2000
Garrett Robert Holmes, Ortonville, MI (US);
Howard William Saxon, Clinton Township, MI (US);
BorgWarner Inc., Troy, MI (US);
Abstract
A solenoid control valve ( ) that includes an electromagnetic coil ( ) positioned within a housing ( ) and a spool valve ( ) positioned within a central bore ( ) of a valve body ( ). An armature ( ), including a pin element ( ) and a check ball ( ), is axially positioned within the coil ( ) and an armature spring ( ) biases the check ball ( ) against an opening in the central bore ( ) when the coil ( ) is not energized. The spool valve ( ) includes an internal chamber and a pair of sealing lands ( ) that selectively seal a supply port ( ) and a control port ( ) within the valve body ( ). A pole piece ( ), including an annular flux shunt portion ( ), is threadably engaged with the housing ( ) to control a working air gap ( ) between the pole piece ( ) and the armature ( ). The flux shunt portion ( ) more radially directs the electromagnetic field lines to weaken the magnetic force as the armature ( ) moves closer to the pole piece ( ). A flux tube ( ) is positioned within the housing ( ).