Internal-combustion engines – Poppet valve operating mechanism – Electrical system
Reexamination Certificate
2006-04-04
2006-04-04
Denion, Thomas (Department: 3748)
Internal-combustion engines
Poppet valve operating mechanism
Electrical system
C123S090120, C251S129150
Reexamination Certificate
active
07021256
ABSTRACT:
An electromagnetic hydraulic valve having an electromagnet with a coil winding arranged on a spool, and a magnet housing, a valve stem having a pressure connection, a tank connection and a consumer connection. The spool and the valve stem are a one-piece plastic body which has an axial longitudinal bore which is an armature space for a magnet armature and also is a control region for a closing body. The magnet housing, with a collar which projects into the longitudinal bore, forms a top magnet pole of the electromagnet. A bottom magnet pole, connected to the magnet housing in a magnetically conductive manner, of the electromagnet likewise projects into the longitudinal bore of the plastic body. The bottom magnet pole of the electromagnet is formed by an annular disk which is integrally cast in the plastic body and which, by a plurality of free sections and a plurality of radial webs at its outer circumference, is designed both as an element for fastening the magnet housing to the hydraulic valve and as an element for fastening the hydraulic valve to an engine block of an internal combustion engine.
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Braun Armin
Wagner Werner
Chang Ching
Denion Thomas
INA - Schaeffler KG
Ostrolenk, Faber, Gerb & Soffen,LLP
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