Title:
SPOOL VALVE
Document Type and Number:
Japanese Patent JP2023060991
Kind Code:
A
Abstract:
To stabilize an actuation of a spool valve.SOLUTION: A spool 20 of a spool valve 100 has a first land part 21 and a second land part 22 partially facing a tank passage 15A, in a neutral position where the communication of a rod side passage 12 and a bottom side passage 13 to tank passages 15A and 15B and a bridge passage 14 is intercepted. The first land part 21 and the second land part 22 facing the tank passage 15A in the neutral position have a first large-diameter portion 21A and a second large-diameter portion 22A that slide with respect to a storage hole 11 while keeping a predetermined first clearance R1, and a first small-diameter portion 21B and a second small-diameter portion 22B that at least partially face the tank passage 15A in the neutral position, and move in the storage hole 11 with a second clearance R2 larger than the first large-diameter portion 21A and the second large-diameter portion 22A.SELECTED DRAWING: Figure 2
Inventors:
ISHIBASHI KOKI
EGAWA YOSHIHIRO
FUJIWARA TAKESHI
YOSHIDA TOKIYO
EGAWA YOSHIHIRO
FUJIWARA TAKESHI
YOSHIDA TOKIYO
Application Number:
JP2021170713A
Publication Date:
May 01, 2023
Filing Date:
October 19, 2021
Export Citation:
Assignee:
KYB CORP
International Classes:
F16K11/07
Domestic Patent References:
| JP2008002663A | 2008-01-10 | |||
| JP2019002436A | 2019-01-10 | |||
| JPS4996522U | 1974-08-20 |
Attorney, Agent or Firm:
Patent Attorney Corporation Goto Patent Office