Title:
FLOW RATE CONTROL VALVE
Document Type and Number:
WIPO Patent Application WO/2023/189986
Kind Code:
A1
Abstract:
A feedback throttle (54) increases an opening amount between a feedback flow path (49) and a back pressure chamber (47) as a main valve (43) is displaced in a direction away from a main valve seat (46). The feedback throttle (54) has a boundary part K that divides the section where the opening amount of the feedback diaphragm (54) changes, so that the rate of change of the opening amount of the feedback throttle (54) changes so as to be smaller with respect to the displacement of the main valve (43) toward the main valve seat (46). The boundary part K is located in the displacement area of the main valve (43) corresponding to the position where the opening part of a main valve throttle (53) is blocked, in relation to the displacement of the main valve (43) toward the main valve seat (46).
Inventors:
KAWASUMI SHOHEI (JP)
Application Number:
PCT/JP2023/011361
Publication Date:
October 05, 2023
Filing Date:
March 23, 2023
Export Citation:
Assignee:
HITACHI CONSTRUCTION MACH CO (JP)
International Classes:
F16K31/124
Foreign References:
| JP2021050779A | 2021-04-01 | |||
| JP2006017273A | 2006-01-19 | |||
| JP2012163156A | 2012-08-30 | |||
| JP2001141108A | 2001-05-25 | |||
| JP2006017273A | 2006-01-19 | |||
| JP4463028B2 | 2010-05-12 |
Attorney, Agent or Firm:
HIROWA PATENT FIRM (JP)
Download PDF:
Previous Patent: CONVEYANCE SYSTEM AND PROGRAM
Next Patent: ANTENNA DEVICE AND UTILITY POLE ANTENNA DEVICE
Next Patent: ANTENNA DEVICE AND UTILITY POLE ANTENNA DEVICE