Patent · US Active

Passive exhaust valve with dual torsion spring

US9982793B2 · kind B2 · utility

7Cited by
54References
5Claims
0Family size

Assignee

Inventors

Key dates

Filing dateAug 5, 2016
Grant dateMay 29, 2018
Priority date—
Expiry dateSep 17, 2036

Classification

  • Technology area (CPC Y)Emerging Cross-Sectional Technologies
  • CPC primaryY10T137/7898
  • WIPO fieldEnvironmental technology
  • WIPO sectorChemistry

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.