Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
DIAPHRAGM VALVE
Document Type and Number:
WIPO Patent Application WO/2019/188510
Kind Code:
A1
Abstract:
Provided is a diaphragm valve with which a seal created by the peripheral edge of a diaphragm can be maintained. A diaphragm valve 1 comprises a diaphragm part, a primary-side part 103, a secondary-side part 104, a main valve 60, a back-pressure chamber 31, a primary-side auxiliary flow channel, a secondary-side auxiliary channel, an auxiliary valve 45, an auxiliary-valve drive unit 40, and body portions 10, 30 that accommodate the main valve 60. The area of a portion in a first body portion 10 that receives one-directional pressure heading from the primary-side part 103 toward the back-pressure chamber 31 is greater than the area of a portion in the first body portion 10 that receives other-directional pressure acting from the back-pressure chamber 31 toward the primary-side part 103.

Inventors:
DOMOTO Naoki (2-1-1 Ojima Koto-k, Tokyo 35, 〒1368535, JP)
KUSHIMOTO Atsushi (2-1-1 Ojima Koto-k, Tokyo 35, 〒1368535, JP)
Application Number:
JP2019/011210
Publication Date:
October 03, 2019
Filing Date:
March 18, 2019
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
LIXIL CORPORATION (2-1-1 Ojima, Koto-ku Tokyo, 35, 〒1368535, JP)
International Classes:
F16K7/12; F16K31/126
Domestic Patent References:
WO2003056222A12003-07-10
Foreign References:
EP0930402A21999-07-21
US20120168005A12012-07-05
Attorney, Agent or Firm:
SHOBAYASHI Masayuki et al. (Sapia Tower, 1-7-12 Marunouchi, Chiyoda-k, Tokyo 05, 〒1000005, JP)
Download PDF: