Cylinder apparatus

Patent metadata

Field	Value
Publication number	US-9052015-B2
Application number	US-201313751645-A
Country	US
Kind code	B2
Filing date	Jan 28, 2013
Priority date	Jan 31, 2012
Publication date	Jun 9, 2015
Grant date	Jun 9, 2015

Abstract

Provided is a cylinder apparatus capable of obtaining optimum valve characteristics. The cylinder apparatus has an annular valve member provided with at least a part of flow paths and having a through-bore, a pin member inserted through the through-bore of the valve member, and an annular disk valve having the pin member inserted therethrough and movable at both inner and outer peripheries thereof selectively away from and into contact with one end surface of the valve member to open and close the flow paths, respectively. The valve member has a projecting portion around the through-bore on the one end surface. The projecting portion is locally provided with circumferentially spaced grooves. The disk valve has small-diameter portions extending toward the grooves from the inner periphery thereof. The small-diameter portions are slidable relative to the pin member.

First claim

What is claimed is:

1. A cylinder apparatus comprising:
a cylinder having a fluid sealed therein;
a rod having one end extending out of the cylinder;
flow paths through which the fluid flows when the rod moves;
an annular valve member provided with at least a part of the flow paths and having a through-bore;
a pin member inserted through the through-bore of the valve member;
an annular disk valve through which the pin member is inserted, the disk valve being movable at b…

Assignees

• Hitachi Automotive Systems Ltd

Inventors

• Ashiba Masahiro

Classifications

• F16J10/02 Primary

  Mechanical Engineering · mapped topic

• F16F9/3484 Primary

  Mechanical Engineering · mapped topic

• F16F9/34 Primary

  Mechanical Engineering · mapped topic