Title:
SPEED CONTROLLER
Document Type and Number:
Japanese Patent JP2018189155
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a speed controller which is applicable to a cylinder of a short stroke by controlling an operation speed in one process of an external cylinder step by step and eliminating a delay time of flow rate control in simple configuration.SOLUTION: A speed controller 1 comprises a first channel 15 and a second channel 16 which circulate a pressure fluid by communicating a first port 12 and a second port 14. In the first channel 15, a first valve 27 is disposed and in the second channel 16, a second valve 28 is disposed. A third channel 22 and a fourth channel 26 are further included. In the third channel 22, a third valve 46 is disposed. The third valve allows only the circulation, in the third channel, from the first port 12 to a portion at the side of a piston shaft 34 for a piston 30 in a cylinder chamber 20, closes the first channel 15 and the fourth channel 26 by moving a third valve element 46a in such a direction that the third channel 22 is opened, and opens the first channel 15 and the fourth channel 26 by moving in such a direction that the third channel 22 is closed.SELECTED DRAWING: Figure 1
Inventors:
HAMA TOMIO
NISHIMAKI YU
NISHIMAKI YU
Application Number:
JP2017091811A
Publication Date:
November 29, 2018
Filing Date:
May 02, 2017
Export Citation:
Assignee:
HAMA INT KK
International Classes:
F15B11/00; F15B11/04
Domestic Patent References:
JPH08189503A | 1996-07-23 |
Foreign References:
WO2016017377A1 | 2016-02-04 |
Attorney, Agent or Firm:
Watanuki International Patent and Trademark Office