A motor driven hydraulic tool including a portable battery is preferably employable for a cable laying operation. To displace a movable die toward and away from a stationary die, a piston is driven by pressurized hydraulic oil fed from a hydraulic pump section. The hydraulic pump section is operatively...http://www.google.de/patents/US5111681?utm_source=gb-gplus-sharePatent US5111681 - Motor driven hydraulic tool
