Title:
PRESSURE CONTROL VALVE
Document Type and Number:
WIPO Patent Application WO/2020/161862
Kind Code:
A1
Abstract:
In the present invention, a damping chamber (12) is formed by a cap member (5), a pilot relief valve (1), and a seat member (3). Due to the action of the damping chamber (12) and an orifice (5a), a damping force acts against the pilot relief valve (1) when the pilot relief valve (1) moves in a direction away from the seat member (3). Meanwhile, when the pilot relief valve (1) moves toward the seat member (3), the pressure of a hydraulic fluid inside the damping chamber (12) increases and causes the cap member (5) to move away from the seat member (3). Consequently, the pressure in an intermediate chamber (11) and the pressure in the damping chamber (12) become the same, and the damping effect with respect to the pilot relief valve (1) no longer exists. Consequently, without incurring any resistance, the pilot relief valve (1) moves rapidly to a position where it contacts the seat member (3).
Inventors:
TSUTSUI RYOTA (JP)
Application Number:
PCT/JP2019/004438
Publication Date:
August 13, 2020
Filing Date:
February 07, 2019
Export Citation:
Assignee:
SHIMADZU CORP (JP)
International Classes:
F16K17/06; F16K47/02
Domestic Patent References:
| WO2017046955A1 | 2017-03-23 |
Foreign References:
| JP2005240993A | 2005-09-08 | |||
| JPS62167977U | 1987-10-24 | |||
| US20160326721A1 | 2016-11-10 |
Attorney, Agent or Firm:
KYOTO INTERNATIONAL PATENT LAW OFFICE (JP)
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