US 12,280,194 B2
Pressure detector
Shingo Okamoto, Shizuoka (JP); Hiroyuki Kawajiri, Shizuoka (JP); and Ryo Kato, Shizuoka (JP)
Assigned to Nikkiso Company Limited, Tokyo (JP)
Filed by Nikkiso Company Limited, Tokyo (JP)
Filed on Nov. 10, 2020, as Appl. No. 17/093,817.
Application 17/093,817 is a continuation of application No. PCT/JP2019/019393, filed on May 15, 2019.
Claims priority of application No. 2018-094462 (JP), filed on May 16, 2018.
Prior Publication US 2021/0052800 A1, Feb. 25, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. A61M 1/36 (2006.01); A61M 1/16 (2006.01)
CPC A61M 1/3639 (2013.01) [A61M 1/1601 (2014.02); A61M 1/3607 (2014.02); A61M 2205/3344 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A pressure detector comprising:
a case connectable to a flow route for liquid, and
a membrane member attached inside the case and with which a liquid-phase portion to be supplied with the liquid in the flow route and a gas-phase portion to be supplied with gas are separated from each other, the membrane member being displaceable in accordance with a pressure of the liquid supplied to the liquid-phase portion,
the pressure detector detecting the pressure of the liquid in the flow route by detecting a pressure in the gas-phase portion, the pressure detector comprising:
an inlet port including an inlet connecting portion connectable to the flow route for the liquid, and an inlet flow-route portion through which the liquid flows into an inlet opening of the liquid-phase portion; and
an outlet port including an outlet connecting portion connectable to the flow route for the liquid, and an outlet flow-route portion through which the liquid having flowed into the liquid-phase portion is discharged from an outlet opening,
wherein at least one of the inlet flow-route portion of the inlet port and the outlet flow-route portion of the outlet port is configured such that an incoming direction or an outgoing direction of the liquid is inclined with respect to an attaching plane defined for the membrane member; and
wherein a first virtual line extends along a center portion of the inlet connecting portion to a first center point, and an inlet center line extends through an inlet center portion of the inlet flow-route portion from the first center point at an incline relative to the first virtual line; or
wherein a second virtual line extends along a center portion of the outlet connecting portion to a second center point, and an outlet center line extends through an outlet center portion of the outlet flow-route portion from the second center point at an incline relative to the second virtual line.