Patent ID: 6427970
Filing Date: 2002-08-06
Classification: F15B,Y10S,Y10T

Abstract:
A voice coil operated valve that includes:a housing having a first chamber that contains a valve sleeve and a valve spool mounted for reciprocal movement within the sleeve along a central axis of the housing; said housing further containing a second chamber located adjacent said first chamber; a linear voice coil actuator mounted within said second chamber that contains a stationary permanent magnet and a coil holder for movably supporting a coil within the magnetic field of said magnet whereby said holder moves along the axis of the housing when a current is applied to said coil; connecting means for coupling the coil holder to the valve spool whereby the spool is positioned within the sleeve in response to the current flow through said coil; and a thermally conductive material positioned between adjacent surfaces of the voice coil actuator and the housing for rapidly conducting heat energy from the voice coil actuator to said housing to maintain the voice coil actuator operating temperature below a level at which the coil windings are damaged.