US 12,076,696 B2
Bubble generating device
Yoshiki Shibata, Aichi (JP); Kouji Hanamura, Aichi (JP); and Yoshitaka Sakamoto, Aichi (JP)
Assigned to Shibata Corporation, Kitanagoya (JP)
Filed by Shibata Corporation, Aichi (JP)
Filed on Aug. 3, 2023, as Appl. No. 18/230,030.
Application 18/230,030 is a continuation of application No. 17/363,686, filed on Jun. 30, 2021, granted, now 11,794,152.
Application 17/363,686 is a continuation of application No. 16/301,890, granted, now 11,077,411, issued on Aug. 3, 2021, previously published as PCT/JP2017/026902, filed on Jul. 25, 2017.
Claims priority of application No. 2016-145587 (JP), filed on Jul. 25, 2016.
Prior Publication US 2023/0372882 A1, Nov. 23, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. B01F 23/00 (2022.01); B01F 23/20 (2022.01); B01F 23/231 (2022.01); B01F 25/40 (2022.01); B01F 25/431 (2022.01); B01F 25/432 (2022.01); B01F 25/433 (2022.01); F15D 1/02 (2006.01)
CPC B01F 23/23105 (2022.01) [B01F 23/20 (2022.01); B01F 25/40 (2022.01); B01F 23/23112 (2022.01); B01F 25/4316 (2022.01); B01F 25/4323 (2022.01); B01F 25/4335 (2022.01); F15D 1/025 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A bubble generator comprising:
a tubular main body, and
a bubble generating part in the tubular main body that generates microbubbles in a water flow passing through the tubular main body,
wherein the bubble generating part has a flow-facing surface that faces the water flow and a vacuum-producing surface that is located on a back side of the flow-facing surface, and the vacuum-producing surface has at least one recess formed therein,
wherein the recess comprises an undersurface which prevents the recess from directly communicating and penetrating through to the flow-facing surface.