Title:
SPOOL VALVE
Document Type and Number:
WIPO Patent Application WO/2023/042776
Kind Code:
A1
Abstract:
A spool valve (1) comprises: a sleeve (10) including an inlet port (11) and an outlet port (12); a spool (20) received in the sleeve (10); a biasing device (30) that presses a proximal end portion (20a) of the spool (20) toward a distal end portion (20b) of the spool (20); and a pressure detection port (56) that opens toward the distal end portion (20b). The spool (20) includes: a first land portion (21) positioned between the pressure detection port (56) and the inlet port (11); a second land portion (22); a groove portion (23) positioned between the first land portion (21) and the second land portion (22); a recessed portion (27) formed in the outer peripheral surface of the second land portion (22); and a communication passage (28) for a working fluid which is formed in the second land portion (22) and which allows communication between the groove portion (23) and the recessed portion (27). In the sleeve (10), a through hole (50) that faces the recessed portion (27) of the spool (20) is formed.
Inventors:
MASUDA SEIEI (JP)
Application Number:
PCT/JP2022/033992
Publication Date:
March 23, 2023
Filing Date:
September 12, 2022
Export Citation:
Assignee:
IHI CORP (JP)
International Classes:
F16K3/26; F16K3/24; F16K3/32
Foreign References:
| JP2004150535A | 2004-05-27 | |||
| JPS50150832U | 1975-12-15 | |||
| JPH03374U | 1991-01-07 | |||
| JP2015169212A | 2015-09-28 |
Attorney, Agent or Firm:
MIYOSHI Hidekazu et al. (JP)
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