Pressure reducing valve

Patent metadata

Field	Value
Publication number	US-11067186-B2
Application number	US-202016796994-A
Country	US
Kind code	B2
Filing date	Feb 21, 2020
Priority date	Feb 25, 2019
Publication date	Jul 20, 2021
Grant date	Jul 20, 2021

Abstract

A pressure reducing valve includes a piston disposed in a cylinder chamber; a valve element that is coupled to the piston and opens and closes a valve seat; a valve spring that biases the valve element in a direction in which the valve element is moved away from the valve seat; and a biasing member that biases the valve seat toward a side opposite to the piston. The pressure reducing valve is configured to reduce a primary pressure of a fluid to a secondary pressure. The valve seat is disposed such that the valve seat reciprocates in the same direction as a direction in which the valve element reciprocates in the primary pressure chamber. As a difference between the primary pressure and the secondary pressure increases, the valve seat moves toward the secondary pressure chamber.

First claim

What is claimed is:

1. A pressure reducing valve comprising: an end member; a housing directly attached to an external surface of the end member;
a joint including a primary pressure chamber;
a cylinder chamber having a secondary pressure chamber, wherein the joint is directly attached to the end member;
a piston disposed in the cylinder chamber such that the piston reciprocates;
a valve element that is coupled to the piston and opens and closes a valve seat, the valve element being disposed at a position closer to the secondary pressure chamber than the valve seat;
a valve seat holder holding the valve seat and being movable together with the valve seat;
a valve spring that biases the valve element in a direction in which the valve element is moved away from the valve seat; and
a spring disposed in the primary pressure chamber of the joint, the spring biasing the valve seat in a direction in which the valve seat holder is moved away from the cylinder chamber toward a side opposite to the piston, wherein:
the pressure reducing valve reduces a primary pressure of a fluid in the joint to a secondary pressure, the fluid flowing from the primary pressure chamber of the joint into the secondary pressure chamber of the cylinder chamber through clearance between the valve element and the valve seat,
the valve seat is disposed in the primary pressure chamber, and the valve seat reciprocates in the same direction as a direction in which the valve element reciprocates, and
as a difference between the primary pressure and the secondary pressure increases, the valve seat moves toward the secondary pressure chamber.

Assignees

• Jtekt Corp

Inventors

• Numazaki Kazushi
• Takabayashi Kazuhiro
• Morita Taizan

Classifications

• Y10T137/7834

  Valve seat or external sleeve moves to open valve · CPC title

• F16K31/1221

  one side of the piston being spring-loaded · CPC title

• Y10T137/7929

  Spring coaxial with valve · CPC title

• G05D16/107

  with a spring-loaded piston in combination with a spring-loaded slideable obturator that move together over range of motion during normal operation · CPC title

• F16K17/0466 Primary

  with a special seating surface · CPC title