Other

Greg Hafner

Bernd Niethammer

Robert H Roy

Martin Luedicke

Jens Gebhardt

A control valve includes a main body, the first coil assembly arranged on the first side of the main body and having the first contact surface and the first through hole extending from the first contact surface, the second coil assembly arranged on the second side of the main body and having the second contact surface and the second through hole extending from the second contact surface, and a spool arranged within the main body and configured to move between the first and second contact surfaces. The spool has the third contact surface facing the first contact surface, the fourth contact surface facing the second contact surface, and the third through hole extending from the third contact surface to the fourth contact surface. A surface pattern is formed on one or more of the first, second, third and fourth contact surfaces and includes the first recessed portion substantially extending from an inner circumference to an outer circumference of the corresponding one of the first, second, third and fourth contact surfaces.

Growing community of inventors

Blythewood, SC, United States of America

Greg Hafner