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Patent Searching and Data

Document Type and Number:
WIPO Patent Application WO/2019/188510
Kind Code:
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.

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:
Publication Date:
October 03, 2019
Filing Date:
March 18, 2019
Export Citation:
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LIXIL CORPORATION (2-1-1 Ojima, Koto-ku Tokyo, 35, 〒1368535, JP)
International Classes:
F16K7/12; F16K31/126
Domestic Patent References:
Foreign References:
Attorney, Agent or Firm:
SHOBAYASHI Masayuki et al. (Sapia Tower, 1-7-12 Marunouchi, Chiyoda-k, Tokyo 05, 〒1000005, JP)
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