US 12,000,389 B2
Gas control device
Masaaki Fujisaki, Kyoto (JP)
Assigned to MURATA MANUFACTURING CO., LTD., Kyoto (JP)
Filed by Murata Manufacturing Co., Ltd., Kyoto (JP)
Filed on Jun. 2, 2022, as Appl. No. 17/805,085.
Application 17/805,085 is a division of application No. 16/050,190, filed on Jul. 31, 2018, granted, now 11,378,071.
Application 16/050,190 is a continuation of application No. PCT/JP2017/003269, filed on Jan. 31, 2017.
Claims priority of application No. 2016-016952 (JP), filed on Feb. 1, 2016.
Prior Publication US 2022/0290665 A1, Sep. 15, 2022
Int. Cl. F04B 45/047 (2006.01); F04B 39/12 (2006.01); F04B 41/06 (2006.01)
CPC F04B 45/047 (2013.01) [F04B 39/12 (2013.01); F04B 41/06 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A gas control device comprising:
a first pump including a first pump casing, a first suction hole and a first discharge hole, wherein the first pump casing has a plurality of outer walls, and the first suction hole and the first discharge hole are provided in the first pump casing;
a second pump including a second pump casing, a second suction hole and a second discharge hole, wherein the second suction hole and the second discharge hole are provided in the second pump casing;
a connection casing; and
a first closed space defined as a space surrounded by the first pump casing, the second pump casing, and the connection casing,
wherein the plurality of outer walls include at least a first outer wall, the first discharge hole is provided in the first outer wall, and the first outer wall faces the first closed space,
wherein the plurality of outer walls further include a second outer wall that faces the first closed space, said second outer wall defining an outer periphery of the first pump casing,
wherein the plurality of outer walls of the first pump casing are located within the connection casing,
wherein the first discharge hole and the second suction hole communicate with each other via the first closed space,
wherein the first and second outer walls face different, respective, directions,
wherein the second pump casing includes a first nozzle and a second nozzle, and
wherein the first closed space communicates with an area outside the second pump casing via only the first and second nozzles of the second pump casing and an area inside the second pump casing.