Pressure booster

Patent metadata

Field	Value
Publication number	US-10876550-B2
Application number	US-201816603059-A
Country	US
Kind code	B2
Filing date	Feb 26, 2018
Priority date	Apr 7, 2017
Publication date	Dec 29, 2020
Grant date	Dec 29, 2020

Abstract

A pressure booster is equipped with a pair of cylinders provided on both sides of a center unit, pistons each disposed inside the pair of cylinders, and a piston rod connecting the pistons. Each of the cylinders has a drive chamber and a booster chamber partitioned by the piston therein, and wherein the pressure booster is further equipped with a switching valve that is switched by abutting on each of the pistons, and a reset valve disposed in a fluid passage connecting a supply port to one of the pair of drive chambers.

First claim

The invention claimed is:

1. A pressure booster comprising:
a center unit;
a pair of cylinders provided on both sides of the center unit;
a pair of pistons, each one of the pair of pistons disposed inside a respective one of the pair of cylinders;
a piston rod connecting the pair of pistons;
a supply port supplied with pressure fluid;
an output port for outputting boosted pressure fluid; and
an exhaust port for discharging the pressure fluid;
wherein the cylinders each have a booster chamber and a drive chamber partitioned by one of the par of pistons; and
wherein the pressure booster further comprises:
a switching valve that is switched by abutting on each of the pistons to make one or the other of the drive chambers communicate with the supply port and to make the other or the one of the drive chambers communicate with the exhaust port; and
a reset valve disposed in a fluid passage connecting the supply port and one of the pair of drive chambers,
wherein the reset valve is constructed as a normally closed valve switchable to a communication state or a cutoff state between the supply port and one of the pair of drive chambers, and is manually switchable to a communication position.

2. The pressure booster according to claim 1 , wherein the switching valve is incorporated into the center unit and includes:
a pair of push rods respectively abuttable on the pistons; and
a spool slid by the pair of push rods.

3. The pressure booster according to claim 1 , wherein:
the reset valve operates to be switched to the communication position when receiving as a pilot pressure the fluid pressure in the drive chamber.

4. The pressure booster according to claim 1 , wherein:
the reset valve is incorporated into the center unit.

Assignees

• Smc Corp

Inventors

• Asaba Tsuyoshi
• Igarashi Tadashi
• Sato Ryosuke

Classifications

• F15B2211/85

  Control during special operating conditions · CPC title

• F15B2211/30565

  having multiple valves for a single output member, e.g. for creating higher valve function by use of multiple valves like two 2/2-valves replacing a 5/3-valve · 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

• F15B9/08 Primary

  controlled by valves affecting the fluid feed or the fluid outlet of the servomotor (F15B9/06 takes precedence) · CPC title