Fluid handling – Systems – Multi-way valve unit
Reexamination Certificate
2006-11-21
2006-11-21
Yu, Justine R. (Department: 3751)
Fluid handling
Systems
Multi-way valve unit
Reexamination Certificate
active
07137411
ABSTRACT:
The invention concerns a hydraulic valve (1) that comprises an electromagnet (2) having an armature (3), and a valve part (4) having at least two valve seats (5, 6). The electromagnet (2) is formed by a hollow cylindrical plastic coil spool (8), a coil winding (10) received in the coil spool (8) and a magnet housing (11) surrounding the coil winding (10), the hollow cylinder of the coil spool (8) being configured as an armature space (14) for the armature (3), into which armature space (14) an upper pole (15) and a lower pole (16) of the electromagnet (2) extend. The valve part (4) is formed by a hollow cylindrical valve housing (18) that comprises a pressure delivery connection (P) on one front end, as well as a load connection (A) and a tank connection (T) arranged on its peripheral surface and, pressed into its hollow cylinder, two cup-shaped deep-drawn parts (23, 24) comprising the valve seats (5, 6). The hydraulic valve (1) can be inserted with the valve part (4) into a complementary valve reception and comprises a fixing flange (26) through which it can be screwed, pressure-medium tight, on the valve reception. In the invention, at least the valve housing (18) of the valve part (4) and/or the lower pole (16) of the electromagnet (2) is configured as a separate part that can be made without chip removal, and the lower pole (16) is made integrally in one piece with the fixing flange (26) of the hydraulic valve (1) and also serves as a reception socket for the valve housing (18).
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Golovatai-Schmidt Eduard
Kraemer Michael
INA - Schaeffler KG
Muserlian Charles A.
Rost Andrew
Yu Justine R.
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