Title:
SUCTION AND EXHAUST VALVE
Document Type and Number:
WIPO Patent Application WO/1998/045631
Kind Code:
A1
Abstract:
A suction and exhaust valve, and more particularly a convenient suction and exhaust valve, which eliminates a partial pressure causing a valve disc to be sucked to a valve port, and simultaneously meets requirements of making a float lightweight and small-sized for the purpose of cost and space savings and making the valve port large in diameter for the purpose of quick suction and exhaust. A suction and exhaust valve provided on a liquid feed pipeline and adapted to permit a float to move up and down to open and close a valve port, mainly characterized by comprising a pressure bearing plate (6) mounted on an inner wall of a valve box upper end (1e) through a seal member (6s) movably up and down and having substantially the same pressure bearing area as that of a valve disc (3), and by a bag chamber (f) sealingly enclosed and defined between the pressure bearing plate (6) and the valve box upper end (1e) and always communicating with a valve box lower chamber (1a) via a communication passage (8).
Inventors:
YOKOTA HIROSHI (JP)
Application Number:
PCT/JP1997/004618
Publication Date:
October 15, 1998
Filing Date:
December 15, 1997
Export Citation:
Assignee:
YOKOTA MFG (JP)
YOKOTA HIROSHI (JP)
YOKOTA HIROSHI (JP)
International Classes:
F16K24/04; (IPC1-7): F16K24/00
Foreign References:
| JPH0979406A | 1997-03-25 | |||
| JPH02125280U | 1990-10-16 | |||
| JPS589025Y2 | 1983-02-18 |
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