Abstract: A crusher includes first and second crusher bodies defining a crushing gap. A hydraulic cylinder is coupled to one of the crusher bodies to adjust a width of the crushing gap. A pressure relief valve includes a pressure chamber communicated with the hydraulic cylinder. A pressure relief piston is movable between a closed position and an open position. The closed position blocks a fluid connection between the pressure chamber and a pressure equalization area exterior of the pressure relief valve. The pressure relief piston includes at least one piston pressure surface delimiting the pressure chamber in the closed position transversely to the actuating direction of the piston, wherein in the closed position of the pressure relief piston a projection of the at least one piston pressure surface in a projection plane transverse to the actuating direction of the pressure relief piston delimits only a part of the pressure chamber transverse to the actuating direction of the pressure relief piston.

Abstract: A crusher includes first and second crusher bodies defining a crushing gap. A hydraulic cylinder is coupled to one of the crusher bodies to adjust a width of the crushing gap. A pressure relief valve includes a pressure chamber communicated with the hydraulic cylinder. A pressure relief piston is movable between a closed position and an open position. The pressure relief piston includes at least one piston pressure surface delimiting the pressure chamber in the closed position transversely to the actuation direction of the piston, the pressure relief piston including a surface area at an end facing away from the pressure chamber, which surface area delimits the chamber area transverse to the actuating direction of the piston to transfer a closing force to the pressure relief piston in a closing direction of the closed position when pressure is applied in a chamber area.

Abstract: A high-pressure pump for the overload protection of a jaw crusher, with an actuator unit which adjustably receives an actuation element in a housing, wherein the actuation element has at least one piston, wherein at least one actuator, tensioning cylinder and a pressure accumulator are provided, wherein the actuator unit is in fluid-conveying connection with the actuator such that in one pump stroke of the actuator unit a transfer fluid is pumped into a second chamber of the actuator and of the tensioning cylinder and the quantity of transfer medium displaced from the actuator, and the tensioning cylinder during the pump stroke is temporarily stored in a pressure accumulator.

Abstract: The invention relates to a crusher, in particular a rotary impact crusher, cone crusher or jaw crusher, having a crusher unit (10), which has a movable first crusher body (11), in particular a rotor or a crusher jaw, wherein a second crusher body (14), in particular an impact rocker or a crusher jaw, is assigned to the first crusher body (11), wherein a crushing gap (15) is formed between the crusher bodies (11, 14), wherein an overload triggering device (30) is coupled to the first crusher body or to the second crusher body, which overload triggering device has a hydraulic cylinder (20) and which overload triggering device is designed to permit a motion of the coupled crusher body (11, 14) increasing the width of the crushing gap (15), wherein the hydraulic cylinder (20) has a pressure chamber (24), which is delimited by means of a piston (23), and wherein the overload triggering device (30) has a pressure valve (31) which, in its open position, establishes a fluid-conveying connection between the pressure c

Abstract: The invention relates to a crusher, in particular a rotary impact crusher, cone crusher or jaw crusher, having a crusher unit (10), which has a movable first crusher body (11), in particular a rotor or a crusher jaw, wherein a second crusher body (14), in particular an impact rocker or a crusher jaw, is assigned to the first crusher body (11), wherein a crushing gap (15) is formed between the crusher bodies (11, 14), wherein an overload triggering device (30) is coupled to the first crusher body or to the second crusher body, which overload triggering device has a hydraulic cylinder (20) and which overload triggering device is designed to permit a motion of the coupled crusher body (11, 14) increasing the width of the crushing gap (15), wherein the hydraulic cylinder (20) has a pressure chamber (24), which is delimited by means of a piston (23), and wherein the overload triggering device (30) has a pressure valve (31) which, in its open position, establishes a fluid-conveying connection between the pressure c

Abstract: The invention relates to a high-pressure pump for the overload protection of a crusher unit (20), in particular a jaw crusher, with an actuator unit (100) which adjustably receives an actuation element (110) in a housing (100.1), wherein the actuation element (110) has at least one piston (110.1, 110.2) or the actuation element (110) is connected to at least one piston (110.1, 110.2), wherein at least one actuator ((80), tensioning cylinder (40)) and a pressure accumulator (150) are provided, wherein the actuator unit (100) is in fluid-conveying connection with the actuator (80) such that in one pump stroke of the actuator unit (100), a transfer means is pumped into a second chamber (40.1, 80.2) of the actuator ((80), tensioning cylinder (40)) and the quantity of transfer medium displaced from a further first chamber (40.2, 80.1) of the actuator ((80), tensioning cylinder (40)) during the pump stroke is temporarily stored in a pressure accumulator (150).

Abstract: A solenoid operated directional valve comprises a plug-in type solenoid which makes electrical connection with a terminal block on the valve body via plug-in type terminals. The plug-in type terminals are on a connector element which is selectively positionable on the solenoid to select either a portion of the solenoid winding which is for 60 hertz energizing current or a portion which is for 50 hertz current.

Abstract: A solenoid operated directional valve 10 that has cushioning chambers 48 and 50 into which the attenuation elements 52 and 54 on the ends of the spool 38 are received for cushioning the movement of the spool, and a transfer loop 56 through which fluid can travel during the cushioning operation, characterized in that the attenuation elements are constructed and arranged so that they will function to purge air or other gaseous fluids from the cushioning chambers and the transfer loop as an incident to reciprocal movement of the spool.