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:
Jun. 06, 1995
Filed:
Jun. 06, 1994
Lee A Naffziger, Sterling, IL (US);
Thomas D Herrington, Dixon, IL (US);
Borg-Warner Automotive, Inc., Sterling Heights, MI (US);
Abstract
A composite check valve and positively closing electromagnetic solenoid valve, particularly such a valve for regulating the introduction of secondary air into the exhaust stream of an internal combustion engine at selected times during the operation of the engine. The valve comprises an inlet port, an outlet port, a first valve element movable between open and closed positions for nominally regulating the flow of a fluid between the inlet and outlet ports, and an electromagnetic solenoid having a closure element for overriding the first element. The rigid disk or closure element can function by seating against the same seat as the first element, or by 'latching' the first element in its closed position. The disclosed embodiment is a flap valve which is modified by superimposing a rigid, movable valve disk over the flap. The rigid disk is connected to the solenoid armature and is movable between an override (closed) position and a disengaged (open) position when the solenoid is energized. The rigid disk may also limit the opening of the flap to regulate the rate of fluid flow through the valve.