Patent ID: 9664119
Date: 2017-05-30
CPC Classifications: F02D,F16K

Claim:
1. A gas flow adjusting device, comprising: a tube body, including two openings and an accommodating space between the two openings; a first horizontal shaft and a second horizontal shaft, which are disposed in the accommodating space of the tube body and spaced apart from each other along an axial direction of the tube body; two leaf structures, pivoted on the first horizontal shaft and having a swinging direction identical to the axial direction; a torsional spring, sleeved around the second horizontal shaft and providing a resilient force along the axial direction of the tube body; and two linkage assemblies, connected to the two leaf structures respectively, wherein each of the two linkage assemblies is connected to the second horizontal shaft and the torsional spring, wherein each of the two linkage assemblies includes a first link and a second link, a first end of the first link is pivoted on the second horizontal shaft and a second end of the first link is rotatably connected to a first end of the second link, and a second end of the second link is rotatably connected to one of the two leaf structures, and the torsional spring includes two cantilever portions which are connected to a joint where the first and second links of the two linkage assemblies are connected together.