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:
May. 20, 1997
Filed:
Oct. 16, 1995
Melvin D Kipp, Flint, MI (US);
David A Singer, Farmington, MI (US);
Mehrnam Sharif-Bakhtiar, Lansing, MI (US);
Frank Ament, Troy, MI (US);
General Motors Corporation, Detroit, MI (US);
Abstract
An exhaust flow control valve operable over high temperature ranges, comprising: a cylindrical flow housing having a cylinder axis and defining a flow passage; a valve plate pivotably mounted within the cylindrical flow housing, wherein the valve plate has a first facing surface, a second facing surface and a perimeter surface and wherein the valve plate has a pivot axis perpendicular to cylinder axis; a first seat extending radially inward from a first approximate 180 degree portion of an inner perimeter of the cylindrical flow housing, wherein the first seat forms a first partial annular surface having a substantially constant width in a radial direction over an entire arcuate length of the first seat and wherein the first seat faces a first direction parallel to the cylinder axis; a second seat extending radially inward from a second approximate 180 degree portion of the inner perimeter of the cylindrical flow housing, wherein the second seat forms a second partial annular surface having a substantially constant width in a radial direction over an entire arcuate length of the second seat, wherein the second seat faces in a second direction opposite the first direction, wherein the first seat is on one side of the pivot axis and the second seat is on another side of the pivot axis opposite the one side, wherein the valve plate has a dosed position at which the first facing surface seats against the first seat and the second facing surface seats against the second seat.