公开(公告)号：US09982793B2

公开(公告)日：2018-05-29

申请号：US15229180

申请日：2016-08-05

Applicant: Tenneco Automotive Operating Company Inc.

Inventor： Stephen M. Thomas ,  David L. Anderson

IPC: F16K15/03 ,  F01N13/08 ,  B23P15/00

CPC classification number: F16K15/033 ,  B23P15/002 ,  F01N13/08 ,  F01N2240/36 ,  F01N2390/08 ,  Y10T137/7898

Abstract: A snap-action valve assembly includes a valve flap positioned within a conduit for controlling exhaust flow through the conduit. A shaft supports the valve flap in the conduit for rotation about a pivot axis between a closed position and an open position. A guide is fixed to the valve flap. A torsion spring is positioned at least partially outside the conduit and includes a first end restricted from rotation in at least one direction. The torsion spring includes a second end coupled to the guide. The torsion spring is preloaded to urge the valve flap into contact with an inner surface of the conduit when the valve flap is in the closed position.