Electromagnetic detent means for sliding spools of directional control valves
Abstract
Abstract A DETENT DEVICE FOR THE SLIDING SPOOL OF A DIRECTIONAL CONTROL VALVE WHEREIN THE SPOOL OF A DIRECTIONAL TO A NEUTRAL POSITION AND IS MOVABLE TO TWO OPERATIVE POSITIONS. THE DETENT DEVICE HAS AN ARMATURE WHICH IS MOUNTED ON THE SPOOL AND IS MOVABLE TOWARD A FIRST OR A SECOND ELECTROMAGNET IN THE VALVE HOUSING IN RESPONSE TO MOVEMENT OF THE SPOOL TO THE ONE OR THE OTHER OPERATIVE POSITION. THE ELECTROMAGNETS ARE AUTOMATICALLY ENERGIZED SHORTLY BEFORE THE SPOOL REACHES AN OPERATIVE POSITION, AND AT LEAST ONE ELECTROMAGNET CAN BE DEENERGIZED WITH A FIXED OR VARIABLE DELAY FOLLOWING ENERGIZATION TO PERMIT A RESETTING SPRING TO RETURN THE SPOOL TO ITS NEUTRAL POSITION. ALTERNATIVELY, THE SPOOL CAN CARRY AN ELECTROMAGNET WHICH IS MOVABLE AGAINST A FIRST OR A SECOND ARMATURE IN THE HOUSING WHEN THE SPOOL MOVES TOWARD ITS FIRST OR SECOND OPERATIVE POSITION. THE ELECTROMAGNET IS ENERGIZED SHORTLY BEFORE IT REACHES THE ONE OR THE OTHER ARMATURE.
Inventors
- 👤 Klaus Schneider
Bibliographic Details
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