US 11,988,569 B2
Pressure detection device and method of manufacturing pressure detection device
Hiroshi Imai, Gyoda (JP)
Assigned to Surpass Industry Co., Ltd, Saitama (JP)
Filed by Surpass Industry Co., Ltd., Gyoda (JP)
Filed on Feb. 11, 2022, as Appl. No. 17/670,047.
Claims priority of application No. 2021-021121 (JP), filed on Feb. 12, 2021.
Prior Publication US 2022/0260445 A1, Aug. 18, 2022
Int. Cl. G01L 19/00 (2006.01); G01L 9/00 (2006.01); G01L 19/14 (2006.01)
CPC G01L 19/14 (2013.01) [G01L 9/0051 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A pressure detection device comprising:
a pressure detection part having a pressure detection surface configured to detect a pressure of a liquid; and
a channel part in which a channel configured to guide a liquid to the pressure detection surface and extending along an axis is formed,
wherein the channel part has a contact part arranged in contact with the pressure detection part,
wherein the contact part has
a protective part arranged in contact with the pressure detection surface and configured to block contact between the pressure detection surface and a liquid, and
a body forming an opening arranged at an end of the channel,
wherein the protective part and the body are formed of a thermoplastic fluorine resin, and
wherein the protective part is arranged so as to close the opening of the body and welded to the body in an annular region extending circumferentially about the axis.