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:
Nov. 08, 1988
Filed:
Mar. 30, 1987
Chip Hewette, Knoxville, TN (US);
Jay L Lewis, Knox County, TN (US);
Robertshaw Controls Company, Richmond, VA (US);
Abstract
An exhaust gas recirculation valve construction and method of making the same are provided, the valve construction comprising a housing provided with an inlet and an outlet separated by a valve seat, an axially movable valve member carried by the housing for opening and closing the valve seat, an electrically operated stepper motor carried by the housing and being operatively interconnected to the valve member for axially positioning the valve member relative to the valve seat, the motor having a rotatable rotor threadedly interconnected to the valve member to cause axial movement of the valve member upon rotatable movement of the rotor, the valve member and the valve seat being arranged so as to be reverse acting, and a spring being operatively interconnected to the valve member to always move the valve member from an open position thereof to its closed position with the valve seat upon loss of electrical current to the motor.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile