Title:
ELECTROMAGNETIC PROPORTIONAL VALVE
Document Type and Number:
WIPO Patent Application WO/2018/180367
Kind Code:
A1
Abstract:
Provided is an electromagnetic proportional valve formed to be compact. An electromagnetic proportional valve (10) is provided with a valve body (11); a spool body (12) disposed in a valve hole (21) in the valve body (11); a driving part (13) that presses the spool body (12) in the forward direction (Dx1); and a biasing part (14) that biases the spool body (12) in the backward direction (Dx2). An output hole (45) in the spool body (12) is connected to an output port (34) in the valve body (11). One end side of the spool body (12) is disposed at a large diameter portion (22) of the valve hole (21), and the other end of the spool body (12) is disposed at a small diameter portion (23) of the valve hole (21). The large diameter portion (22) and the small diameter portion (23) are connected to a spool hole (41) included in the spool body (12). A surface area of the spool body (12) for receiving a force, in the forward direction (Dx1), from pressure oil filling the valve hole (21) and the spool hole (41) is different from a surface area of the spool body (12) for receiving a force, in the backward direction (Dx2), from said oil.
Inventors:
IWASAKI HITOSHI (JP)
NISHIDA YUHEI (JP)
NISHIDA YUHEI (JP)
Application Number:
PCT/JP2018/009207
Publication Date:
October 04, 2018
Filing Date:
March 09, 2018
Export Citation:
Assignee:
NABTESCO CORP (JP)
International Classes:
F16K11/065; F16K3/26; F16K31/06
Foreign References:
| JPS5338034U | 1978-04-03 | |||
| JPH02163583A | 1990-06-22 |
Other References:
See also references of EP 3604875A4
Attorney, Agent or Firm:
NAGAI Hiroshi et al. (JP)
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