Patent ID: 9243531
Filing Date: 2016-01-26
CPC Classification: F01N,F23C,F23D,F23G

Claim Text:
1. A burner for an exhaust gas purification device comprising: a base unit; a first tube, which includes: a second tube, which includes a basal portion and a distal portion, wherein the basal portion and the distal portion are fixed to the base unit, wherein the first tube includes an extendable portion that can be extended and contracted in a direction parallel to a central axis of the first tube, and the first tube and the second tube are radially overlapped to have a multilayer tube structure, wherein at least one of the first tube and the second tube further includes a swirling flow generating portion, and the extendable portion includes a circumferential wall, which extends in a swirling direction of a swirling flow and is bellows-shaped.