초록 ▼

Apparatus for performing work by advancing a tool against a resistance thereto, and in particular, an excavator attachment or a rock concrete or engine crusher in which a pivoted jaw member (16) is advanced by a hydraulic ram (30) against a fixed plate (22) includes percussion device in the form of

Apparatus for performing work by advancing a tool against a resistance thereto, and in particular, an excavator attachment or a rock concrete or engine crusher in which a pivoted jaw member (16) is advanced by a hydraulic ram (30) against a fixed plate (22) includes percussion device in the form of a hydraulic hammer acting against a fixed anvil (46,50) to assist the ram. Hydraulic fluid can be diverted from the ram to the hammer as required.

대표청구항 ▼

[ I claim:] [1.] Apparatus for performing work by advancing a tool against resistance thereto, comprising a tool-carrying member which is solid with the tool or at least carries the tool with no relative movement in the direction of advance of the tool;a reference member;an actuator operatively conn

[ I claim:] [1.] Apparatus for performing work by advancing a tool against resistance thereto, comprising a tool-carrying member which is solid with the tool or at least carries the tool with no relative movement in the direction of advance of the tool;a reference member;an actuator operatively connected between the two members and adapted to apply and maintain a persistent force therebetween urging the tool-carrying member to advance relative to the reference member against said resistance;and percussion means associated with the tool-carrying member, comprising a housing positively connected to the tool-carrying member, an inertial mass movable along a reciprocating path inside the housing, and means for reciprocating the mass along the path in the housing to periodically augment the persistent force applied by the actuator to the tool-carrying member by periodic percussive impact forces applied by the reciprocating mass against one end of the path and transmitted to the tool-carrying member and thereby to assist the advance of the tool relative to the reference member against said resistance.