Method for operating hydraulic pressing device, particularly hand pressing device, involves moving movable part in pressing position by developing of hydraulic pressure

摘要

The method involves moving a movable part (4) in a pressing position by the developing of a hydraulic pressure. The hydraulic pressure results by filling a hydraulic chamber (H) with hydraulic medium from a storage area by using the hydraulic pump. The movable part is formed for automatically returning in an end position from the pressing position under the action of a returning spring. The pressure drop is produced by a direct connection between the hydraulic chamber and the storage area bypassing a recirculation valve. An independent claim is included for a deep injection device with a direct connection formed as bypass line to the storage room.