Fluid handling – Systems – Multi-way valve unit
Patent
1985-03-20
1986-06-03
Schwadron, Martin P.
Fluid handling
Systems
Multi-way valve unit
13762521, 384295, 384296, 384903, F16K 1122, F16C 3302
Patent
active
045923892
ABSTRACT:
A rotary valve which includes a valve sleeve having a cylindrical internal cavity and a plurality of axial grooves formed on the wall surface of the internal cavity; a valve spool fitted in the internal cavity of the valve sleeve and rotatable relative to the valve sleeve for controlling flow of a pressurized fluid through the valve; an annular groove formed at least at one end of the valve sleeve and having a diameter larger than that of the internal cavity; a bush fitted in the annular groove and having a hole of the same diameter as the internal cavity of the valve sleeve; a seal material interposed between engaging surfaces of the bush and annular groove; chamfered surface formed at the outer corner edge of the bush; and an annular thin-wall portion formed at the end of the valve sleeve and bent radially inward to retain the bush in the annular groove.
REFERENCES:
patent: 944423 (1909-12-01), Feix
patent: 1005954 (1911-10-01), Fritz
patent: 1649409 (1927-11-01), Jardine
patent: 1947973 (1934-02-01), Davis
patent: 2724893 (1955-11-01), O'Connor et al.
patent: 4009641 (1977-03-01), Rohde et al.
patent: 4452274 (1984-06-01), Haga et al.
Goto Toshihiro
Hirokawa Toshio
Yamada Ryuichi
Schwadron Martin P.
Starsiak Jr. John S.
Toyoda Koki Kabushiki Kaisha
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