Fluid handling – Systems – Multi-way valve unit
Patent
1998-06-30
1999-08-17
Fox, John
Fluid handling
Systems
Multi-way valve unit
251288, F16K 1106
Patent
active
059379022
ABSTRACT:
In a rotary flow-path exchanging valve, a high pressure side communicating groove 37 is provided to communicate a first exchanging port 23 and a second exchanging port 27 of a valve seat plate 5 with a high pressure side communicating port selectively. A part of a joint pipe 17 to be connected to the high pressure side port 19 is protruded into the high pressure side communicating groove 27. The protruding part constitutes a stopper pipe 20 for limiting the rotatable range of a valve element 1. In installing the stopper pipe 20, it is connected and secured to the high pressure side port 19 of the valve seat plate 5, and thereafter is hardened by plastic deformation processing. Thus, when the stopper pipe is heated by soldering for its securing to the valve seat 5, the necessary strength thereof can be maintained.
REFERENCES:
patent: 330861 (1885-11-01), Wuerpel
patent: 2855000 (1958-10-01), Van Allen et al.
patent: 4825908 (1989-05-01), Tsuchihashi et al.
Aihara Kazunori
Hirata Kazuo
Kanasaki Fumio
Nakagawa Noboru
Noda Mitsuaki
Fox John
Kabushiki Kaisha Saginomiya Seisakusho
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