US 11,739,981 B1
Isolation valve
Sadanori Matsui, Nagahama (JP); Yukikazu Terada, Nagahama (JP); and Takashi Kitagawa, Nagahama (JP)
Assigned to MATSUIKIKI INDUSTRIES CO., LTD, Nagahama (JP)
Filed by MATSUIKIKI INDUSTRIES CO., LTD., Nagahama (JP)
Filed on Feb. 8, 2022, as Appl. No. 17/666,563.
Int. Cl. F24H 9/00 (2022.01); F16K 11/22 (2006.01); F24H 1/10 (2022.01)
CPC F24H 9/0042 (2013.01) [F16K 11/22 (2013.01); F24H 1/10 (2013.01)] 15 Claims
OG exemplary drawing
 
1. An isolation valve comprising:
a main body including a fluid passage;
a first port connected to the fluid passage;
a second port connected to the fluid passage;
a third port including an openable and closable valve, the valve connecting the third port to the fluid passage; and
a plug removably coupled to the second port,
wherein the second port includes:
an outlet including an opening to an outside of the isolation valve;
an internally threaded section formed on a portion of an inner surface of the outlet; and
a first tapered portion having a diameter which decreases as the first tapered portion extends away from the outlet, a first angle is defined by the first tapered portion relative to a central axis of the outlet,
wherein the plug includes:
a center portion;
a proximal end portion located on a side of the center portion opposite the second port;
a distal end portion located on a side of the center portion opposite the proximal end portion, the distal end portion including a second tapered portion, the second tapered portion being shaped so as to engage the first tapered portion of the second port when the plug is in a closed position, a second angle is defined by the second tapered portion relative to a central axis of the plug; and
threads located on an outer diameter of the center portion and configured to engage the internally threaded section of the second port; and
wherein the first angle is not equal to the second angle.