Fluid equipment

Patent metadata

Field	Value
Publication number	US-11035387-B2
Application number	US-201816491125-A
Country	US
Kind code	B2
Filing date	Mar 13, 2018
Priority date	Mar 21, 2017
Publication date	Jun 15, 2021
Grant date	Jun 15, 2021

Abstract

Fluid equipment includes a container configured for having first and second fluids therein, a first fluid outlet/inlet path provided for outflow and inflow of the first fluid, a second fluid outlet/inlet path for outflow and inflow of the second fluid, and a member configured for moving in the container in response to pressure of the first fluid, the fluid equipment transmitting energy from the first to the second fluid. A first bellows is configured such that one end is closed in a sealed state by the moving member, the other end is fixed to an inner surface part of the container in a sealed state, and the inside of the first bellows communicates with the first fluid outlet/outlet path.

First claim

The invention claimed is:

1. Fluid equipment comprising a container configured for holding a first fluid and a second fluid housed therein, a first fluid outlet/inlet path provided at the container for outflow and inflow of the first fluid, a second fluid outlet/inlet path provided at the container for outflow and inflow of the second fluid, and a moving member configured for moving in the container in response to a pressure of the first fluid, the fluid equipment transmitting energy from the first fluid to the second fluid,
the fluid equipment further comprising a first bellows and a second bellows configured for expanding and contracting,
the first bellows having a first end portion closed in a sealed state by the moving member and a second end portion fixed to a first inner surface part of the container in a sealed state,
the second bellows being opposed to the first bellows through the moving member, said second bellows having a first end portion closed in a sealed state by the moving member and a second end portion fixed to a second inner surface part of the container in a sealed state,
an inside of the first bellows being configured for communicating with the first fluid outlet/inlet path,
the first fluid and the second fluid being non-compressible fluid,
the container being provided with a first fluid chamber formed inside the first bellows and a second fluid chamber formed inside the second bellows,
the first fluid chamber and the second fluid chamber storing the first fluid and the second fluid, respectively, and being in non-communication,
the fluid equipment further comprising a seal member attached to the moving member, the seal member being configured for closing the first fluid outlet/inlet path,
the second bellows being smaller than the first bellows in diameter, and
a gas chamber being formed outside the second bellows and the first bellows and having a gas injected thereinto.

2. The fluid equipment according to claim 1 , wherein
the moving member has a first surface portion partially defining the first fluid chamber and a second surface portion opposed to the first surface portion and partially defining the second fluid chamber.

3. The fluid equipment according to claim 2 , wherein the moving member includes a guide portion contacting an inner periphery of the container.

4. The fluid equipment according to claim 3 , wherein
a communication path penetrating the guide portion in a thickness direction and communicating with an outside of the first bellows is provided at the guide portion.

5. The fluid equipment according to claim 2 , wherein the first fluid and the second fluid are different types of fluid.

6. The fluid equipment according to claim 1 , wherein
the second bellows is fixed to the moving member in a coaxial relationship with the moving member.

7. The fluid equipment according to claim 6 , wherein
the moving member includes a guide portion contacting an inner periphery of the container.

8. The fluid equipment according to claim 6 , wherein the first fluid and the second fluid are different types of fluid.

9. The fluid equipment according to claim 1 , wherein
the moving member includes a guide portion contacting an inner periphery of the container.

10. The fluid equipment according to claim 9 , wherein
a communication path penetrating the guide portion in a thickness direction and communicating with an outside of the first bellows is provided at the guide portion.

11. The fluid equipment according to claim 1 , wherein
the first fluid and the second fluid are different types of fluid.

Assignees

• Eagle Ind Co Ltd

Inventors

• Arikawa Tatsuhiro

Classifications

• F15B2013/0414

  Dosing devices · CPC title

• F15B11/13

  using {separate dosing} chambers of predetermined volume · CPC title

• F15B3/00 Primary

  Intensifiers or fluid-pressure converters, e.g. pressure exchangers; Conveying pressure from one fluid system to another, without contact between the fluids {(fluid-driven pumps F04B9/08)} · CPC title

• F15B2201/3153

  the flexible separating means being bellows · CPC title

• F15B2201/413

  having multiple liquid ports · CPC title