US 11,747,183 B2
Air flow rate measurement device
Takuma Tsuchiya, Kariya (JP); and Akiyuki Sudou, Kariya (JP)
Assigned to DENSO CORPORATION, Kariya (JP)
Filed by DENSO CORPORATION, Kariya (JP)
Filed on Jul. 13, 2021, as Appl. No. 17/374,202.
Application 17/374,202 is a continuation of application No. PCT/JP2019/046577, filed on Nov. 28, 2019.
Claims priority of application No. 2019-004625 (JP), filed on Jan. 15, 2019.
Prior Publication US 2021/0341324 A1, Nov. 4, 2021
Int. Cl. G01F 1/684 (2006.01); G01F 5/00 (2006.01); B29C 33/00 (2006.01); B29C 45/00 (2006.01); B29C 65/00 (2006.01)
CPC G01F 1/6842 (2013.01) [B29C 33/005 (2013.01); G01F 5/00 (2013.01); B29C 45/0025 (2013.01); B29C 66/306 (2013.01); B29C 66/328 (2013.01); B29C 2045/0034 (2013.01)] 5 Claims
OG exemplary drawing
 
1. An air flow rate measurement device to be installed in a main passage that is configured to cause air to flow therethrough, the air flow rate measurement device comprising:
a housing having a front surface on an upstream side of the main passage, a rear surface on a downstream side of the main passage, and a side surface connecting the front surface with the rear surface, the housing formed by injection molding;
a first sub-passage formed in the housing, the first sub-passage communicating a first sub-passage inlet, which is formed in the front surface, with a first sub-passage outlet, which is formed in the rear surface;
a second sub-passage formed in the housing, the second sub-passage communicating a second sub-passage inlet, which is formed in a midway portion of the first sub-passage, with a second sub-passage outlet, which is formed at a position different from the first sub-passage outlet;
a flow rate detection unit provided in the second sub-passage and configured to output a signal according to a flow rate of air flowing through the second sub-passage; and
a mold parting mark formed in the rear surface of the housing at a position that is away from an inner opening edge of the first sub-passage outlet.