DRAIN TRAP

WIPO Patent Application WO/2018/008294

A1

This drain pipe 1 comprises: a reservoir 13; a discharge path 22 that communicates with the reservoir 13; an annular valve seat 25 provided protruding into the discharge path 22; a pressure chamber 36; a valve body 34 that has formed therein a pilot flow path 35 through which the drain of the reservoir 13 flows into the pressure chamber 36, and that advances and retreats in accordance with the pressure in the pressure chamber 36, thereby seating and unseating the valve body to and from the valve seat 25 from the upstream side thereof so as to open and close the discharge path 22; and a float 16 that is provided in the reservoir chamber 13, and that opens and closes an opening in the pilot flow path 35 in the valve body 34. The valve seat 25 has a seat surface 25a on the upstream side of a protruding end surface 25b. The valve body 34 has: a tapered part 34b that makes surface contact with the seat surface 25a; and a cylindrical part 34c which is formed on the downstream side of the tapered part 34b, and of which the opening surface area formed between the cylindrical part 34c and the protruding end surface 25b is smaller than the opening surface area formed between the seat surface 25a and the tapered part 34b when the valve body 34 is unseated.

JP5275277	Control valve
JP6371477	Valve seat and drain trap

ASAOKA KEN (JP)

PCT/JP2017/019861

January 11, 2018

May 29, 2017

Click for automatic bibliography generation  

TLV CO LTD (JP)

F16T1/22; F16K1/36; F16K1/38; F16K1/42; F16K1/52; F16K47/02; F16T1/20

JP2015224753A	2015-12-14
JP2004068954A	2004-03-04
JP2001248740A	2001-09-14
JP2007292089A	2007-11-08
US5878993A	1999-03-09

TERAZONO Kenichi et al. (JP)

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