Metal working – Method of mechanical manufacture – Valve or choke making
Patent
1992-03-19
1993-08-17
Cuda, Irene
Metal working
Method of mechanical manufacture
Valve or choke making
29558, 29890126, 29890132, 13762569, B23P 1500
Patent
active
052357465
ABSTRACT:
A servo valve body is made by first boring a central cylindrical passageway, for receiving a valve spool, through an elongated, substantially rectangular valve block of tool steel. A plurality of cross slots are cut through the valve block, from one side through to the opposite side, at intervals along the length of the block, orthogonally to the axis of the passageway. The cross slots are cut by use of electronic discharge machining technology. The cross slots serve as fluid flow chambers when the cross slots are terminated by transition plates secured to the opposite sides of the valve block. The transition plates provide fluid inlet, outlet and drain ports. The valve block in combination with the transition plates comprises the servo valve body.
REFERENCES:
patent: 3103739 (1963-09-01), Moog
patent: 3188724 (1965-06-01), Bates et al.
patent: 3206837 (1965-09-01), Holmes
patent: 3715098 (1973-02-01), Baumann
patent: 4017706 (1977-04-01), Aurbrecht et al.
patent: 4593719 (1986-06-01), Leonard
patent: 4719681 (1988-01-01), Piet
Basic Theory, Electrical Discharge Machining; EDM Todya, May, Jun. 1991; by E. P. Guitrau.
Atlas Fluid Controls Inc.
Cuda Irene
Knox William A.
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