Hydraulic apparatus for producing impacts
Hydraulic drive mechanism
Hydraulic driving device
Hydraulic motor
Hydraulic oscillator
Hydraulic percussion apparatus
Hydraulic percussion device and method of controlling same
Hydraulic pressure intensifier
Hydraulic striking mechanism
Hydraulically actuated breaker with lost-motion prevention devic
Hydraulically operable linear motor
Hydraulically operated impacting device
Hydraulically-operated devices
Hydroacoustic apparatus and valving mechanisms for use therein