公开(公告)号：US11060892B2

公开(公告)日：2021-07-13

申请号：US16644827

申请日：2018-08-24

Applicant: CKD CORPORATION

Inventor： Yasushi Ohshima ,  Yuki Sakaki ,  Takaharu Matsuura ,  Ryo Eguchi

IPC: G01F1/32

Abstract: In this vortex flowmeter provided with a vortex generator and a flow rate measuring unit the flow rate measurement unit includes a piezoelectric element and a piezoelectric element case. The piezoelectric element case includes: a fitted part fitted in the body case; a pressure receiving part protruding out from a distal end face of the fitted part and placed in a body passage; a hollow portion formed along the axial direction of the piezoelectric element case in the fitted part to separate the fitted part and the pressure receiving part; and a slit formed inside of the pressure receiving part and configured to accommodate the piezoelectric element.

公开(公告)号：US11307076B2

公开(公告)日：2022-04-19

申请号：US16644829

申请日：2018-08-24

Applicant: CKD CORPORATION

Inventor： Yasushi Ohshima ,  Ryo Eguchi ,  Takaharu Matsuura ,  Yuki Sakaki

IPC: G01F15/02 ,  G01F1/32

Abstract: In this vortex flowmeter provided with a vortex generator and a flow rate measuring unit, a seal member is mounted on a temperature sensing element including a temperature sensor adhered with an adhesive to a metal temperature sensing case. The temperature sensing element is inserted into a first insertion hole formed in a body case so as to communicate with a body passage. A distal end surface of the temperature sensing element is arranged in either a position where the distal end surface is flush with the passage surface of the body passage formed in the body case or a position more outside than the passage surface in the radial direction of the body passage.

公开(公告)号：US10605636B2

公开(公告)日：2020-03-31

申请号：US16307030

申请日：2018-06-13

Applicant: CKD CORPORATION

Inventor： Ryo Eguchi ,  Naotsugu Seko ,  Kazutoshi Ito

IPC: G01F1/42 ,  G01F1/00 ,  G01F1/68 ,  G01F15/10

Abstract: A flowmeter including a sensor passage disposed with a sensor chip for measuring a flow rate and an orifice passage as a bypass passage placed with respect to the sensor passage is provided. The orifice passage has a passage diameter which is smaller than a passage diameter of an inflow passage, a distribution orifice is placed on an inlet side of the sensor passage, and the orifice passage and the distribution orifice are configured such that changing trends in an effective sectional area becomes same in a graph including a vertical axis indicating the effective sectional area and a lateral axis indicating a fluid pressure of a fluid.