High-pressure fluid discharge device

Patent metadata

Field	Value
Publication number	US-12305674-B2
Application number	US-202017603375-A
Country	US
Kind code	B2
Filing date	Feb 17, 2020
Priority date	Apr 18, 2019
Publication date	May 20, 2025
Grant date	May 20, 2025

Abstract

A high-pressure fluid discharge device has an input port through which a high-pressure fluid is fed, a tank chamber which stores the high-pressure fluid, and a discharge port through which the high-pressure fluid is discharged. A diaphragm valve divides a pilot chamber and a valve chamber communicating with the tank chamber; the pilot chamber communicates with the valve chamber through a pilot passage; the valve chamber communicates with the discharge port through a discharge passage while the diaphragm valve is open; an opening-closing control valve is provided in open flow paths for opening the pilot chamber to the discharge passage; and the opening-closing control valve is opened and closed by the pressure of the fluid fed from the tank chamber.

First claim

The invention claimed is:

1. A pressurized fluid discharge device comprising an inlet port to which a pressurized fluid is supplied, a tank chamber configured to store the pressurized fluid, and a discharge port configured to discharge the pressurized fluid, wherein:
the pressurized fluid discharge device further comprises a diaphragm valve configured to separate a pilot chamber and a valve chamber communicating with the tank chamber;
the pilot chamber communicates with the valve chamber through a pilot passage provided inside the diaphragm valve;
when the diaphragm valve opens, the valve chamber communicates with the discharge port through a discharge passage;
the pressurized fluid discharge device further comprises an opening and closing control valve provided in a release flow path and configured to open the pilot chamber to the discharge passage in a state where the diaphragm valve is closed; and
the opening and closing control valve is operated to open and close by a pressure of fluid that is supplied from the tank chamber through an operating air flow path without passing through the valve chamber.

2. The pressurized fluid discharge device according to claim 1 , wherein a speed controller is provided in the operating air flow path for fluid for opening and closing the opening and closing control valve.

3. The pressurized fluid discharge device according to claim 1 , further comprising:
a tank housing in which the tank chamber is formed;
a diaphragm housing incorporating the diaphragm valve; and
a control housing incorporating the opening and closing control valve.

4. The pressurized fluid discharge device according to claim 3 , wherein a connecting plate configured to mount the diaphragm housing and the control housing is disposed on a cylinder tube constituting the tank housing.

5. The pressurized fluid discharge device according to claim 1 , further comprising:
a tool holder containing the tank chamber thereinside, a diaphragm housing incorporating the diaphragm valve, and a control housing incorporating the opening and closing control valve.

6. The pressurized fluid discharge device according to claim 5 , wherein the tool holder includes the inlet port on one end side of the tool holder in an axial direction thereof, a cover plate is attached to another end side of the tool holder in the axial direction, and the diaphragm housing and the control housing are attached to the cover plate.

7. The pressurized fluid discharge device according to claim 1 , wherein the pressurized fluid is pressurized air.

Assignees

• Smc Corp

Inventors

• Doi Yoshitada
• Oshima Masayuki
• Sasaki Hiroaki

Classifications

• F16K31/385

  the fluid acting on a diaphragm · CPC title

• F16K31/126

  the fluid acting on a diaphragm, bellows, or the like (F16K31/145, F16K31/165, F16K31/365, F16K31/385 take precedence) · CPC title

• F16K7/17

  the diaphragm being actuated by fluid pressure · CPC title

• B05B9/03

  characterised by means for supplying liquid or other fluent material {(B05B9/002 takes precedence)} · CPC title

• B05B1/32 Primary

  in which a valve member forms part of the outlet opening {(B05B1/3033 takes precedence)} · CPC title