Abstract: A clearing cylinder comprises an upper cylindrical housing, a lower cylindrical housing, and a head assembly. The upper cylindrical housing further comprises an upper surface having a first circumferential recess, a first wiper ring disposed within the first circumferential recess, an upper side wall, and an upper bore defined within the upper side wall. The lower cylindrical housing further comprises a lower side wall defining an internal cylindrical cavity and containing a breather vent. The head assembly is disposed between the upper cylindrical housing and the lower cylindrical housing and further comprises a second circumferential recess defined within a topmost inside surface of the head assembly and a second wiper ring disposed within the second circumferential recess.

Abstract: A crusher may include a crushing member that is driven in an operatively connected manner by way of an eccentric element such that material to be crushed can be comminuted by way of a crushing movement generated at least in part by the eccentric element. At least one eccentric bushing may be connected by way of an active surface to the eccentric element by way of frictional engagement. The eccentric bushing may have a pressure medium chamber that uses pressure to vary the frictional engagement between the eccentric element and the eccentric bushing. In some examples, the crusher may be of a jaw type or a cone type.

Abstract: A gyratory crusher hydraulic pressure relief valve includes a hydraulic fluid vestibule arranged to be fluidly connected to a hydraulic fluid space. A logic element is arranged to dump hydraulic fluid from the hydraulic fluid space, which includes a plunger having a first plunger surface and a second plunger surface, and a control pipe arranged for fluidly connecting the second plunger surface to the hydraulic fluid vestibule. A supply orifice restricts the flow of hydraulic fluid from the vestibule towards the second plunger surface to make the time TC it takes for the logic element to switch from open position to closed position exceed the time TF it takes for a closed side setting position of the crusher to make one full round.

Abstract: An adjustment and suspension system for supporting the mainshaft of a gyratory crusher within a stationary spider hub. The system includes a piston movable within the spider hub to adjust the vertical position of the mainshaft. A stop member positioned within the spider hub controls the maximum vertical movement of the piston within the spider hub. A drive assembly is used to adjust the vertical position of the stop member to limit the vertical position of the mainshaft. The mainshaft is supported by a vertical support bearing and a radial support bearing that are located separate from each other. The vertical position of the drive shaft is controlled by a supply of pressurized hydraulic fluid introduced into the spider hub to control the vertical position of the movable piston.

Abstract: A crusher device includes a crusher head positioned within a container that is fed material to be crushed by the crusher head. The body of the crusher head includes at least one aperture in which at least one of an eccentric assembly and a portion of a cylinder is positioned. The container that receives material may be defined by a substantially vertical inner wall. The inner wall may be defined by a wearable surface. The crusher head may also have a wearable surface defined by a mantle.

Abstract: A gyratory crusher, including an outer crushing shell and an inner crushing shell forming between them a crushing chamber, the crushing chamber communicating with a discharge zone that forwards crushed material from the crushing chamber and out of the crusher. The inner crushing shell is supported on a crushing head. The outer crushing shell is supported on a crusher frame. At least one sealing arrangement is between the discharge zone and a working part zone in which at least one bearing for the crushing head to perform a gyratory movement relative to the crusher frame is arranged. The sealing arrangement includes a sealing surface, and a sealing member arranged to seal against the sealing surface and including an inner circumferential flexible sealing lip, an outer circumferential flexible sealing lip and at least one inlet for pressurized fluid to be supplied to an overpressure zone arranged between the inner and outer sealing lips and the sealing surface.

Abstract: A cone crusher includes a stationary main shaft and an eccentric that rotates about the main shaft to cause gyrational movement of a head assembly to crush rock within a crushing gap. The cone crusher includes a counterweight assembly mounted for rotation with the eccentric. The counterweight assembly includes a counterweight body having a series of tanks. Each tank can receive either a first ballast and a second ballast or a combination thereof. The first ballast is formed from a material having higher density than the second ballast to increase the concentration of weighting in desired locations around the counterweight assembly.

Abstract: A central shaft for a gyratory crusher, which includes a crushing head on which a first crushing shell is mounted; a frame on which a second crushing shell is mounted, which second crushing shell defines, together with the first crushing shell, a crushing gap; and a driving device, which is arranged to rotate an eccentric about said central shaft and thereby to cause the crushing head to execute a gyratory movement for crushing of material that is introduced in the crushing gap. The central shaft has a cavity in which are accommodated an anti-reverse and a torque limiter, the anti-reverse and the torque limiter being adapted for connection to said crushing head for restricting spinning.

Abstract: A gyratory crusher has a crushing head fixedly attached to an upper portion of a substantially vertical shaft, on which crushing head a first crushing shell is mounted, and a frame on which a second crushing shell is mounted. The second crushing shell defines, together with the first crushing shell, a crushing gap. The gyratory crusher has a space adapted to contain liquid. The space is defined by a piston, which is formed at least partly of the lower end of the shaft, a cylinder, which is formed at least partly in an eccentric assembly, and a bottom element. The space is adapted to form a cushion with the aid of the liquid, so that the cushion can serve as a thrust bearing transmitting vertical forces from the crushing head to the bottom element.

Abstract: The machine is comprised of a main body (32), a bonnet (14) which rests on the upper frame of the main body (32) and a concave holder (66) threadably inserted into the bonnet (14). The bonnet (14) is maintained in intimate contact with the main body (32) by means of a plurality of tramp iron cylinders (18) while the concave holder (66) is screwed into the bonnet (14) by means of an adjusting gear (16) and matching pinion (58). The concave holder (66) is locked in position within the bonnet (14) by means of a plurality of locking cylinders (60) positively engaging a locking slide ring (64). A mantle (70) covered male conical member (28) is driven by a crown gear (36) and pinion (52) in an elliptical rotation within the confines of a concave die (68) thus crushing the raw rock on each near pass.

Abstract: A vibrating cone crusher which crushes material between a cone and a frustoconical ring located therearound. An annular frame supports the ring and a device for generating circular vibrations in a horizontal plane. Tie rods connect the frame to a cone holder. Vertical vibration that disrupts crusher operation is reduced or neutralized by positioning the center of gravity of the cone, the cone holder, the frame, and items supported thereon adjacent the plane of vibratory forces.

Abstract: A cone crusher features a "fine" head and a pair of adapters and associated mantles which allow conversion of the crusher from fine to coarse operation, or vice versa, without the need to change the head itself. Each adapter and its associated mantle can be put on or taken off the head as a unit.

Abstract: A piston and cylinder unit for a gyratory crusher including a cylinder having an upper piston carrying the crusher head and a lower piston dividing the interior of the cylinder into a hydraulic chamber and a gas chamber. The hydraulic chamber is selectively chargeable with hydraulic fluid to adjust the crushing gap between the crusher head and the bowl of the crusher, and the gas chamber is connected in communication with a pressure relief chamber within the lower piston to provide an accummulator within the unit accommodating the momentary displacement of the crusher head by noncrushable materials moving through the crushing gap during crushing operations.

Abstract: The invention relates to a gyratory crusher having a breaking head resting on the piston of a hydraulic adjustment ram. This crusher is characterized in that the piston of the ram carries a rack arranged parallel to its axis and a pinion meshing with this rack is fixed to the end of a shaft going through the wall of the ram cylinder, the other end of this shaft being coupled to a sensor delivering an electric signal according to the angular position of the shaft. The invention is applicable to gyratory or cone crushers or breakers.

Abstract: A gas distribution manifold arrangement and methods for the gas precharge of a plurality of associated hydropneumatic hydraulic accumulators. Each accumulator receives, as by an elastic bladder in the accumulator, a precharge of a pneumatic fluid such as nitrogen. Each accumulator has a corresponding gas inlet valve through which pneumatic fluid is admitted to the accumulator. A hollow gas manifold is provided and a separate conduit connects the corresponding gas inlet valve of each accumulator through a corresponding selector valve on the manifold to the interior of the manifold. With the gas inlet valve of each accumulator open, and all of the selector valves on the gas manifold open, charging gas admitted to the gas manifold flows in parallel paths to apply an equal gas precharge to all accumulators.

Abstract: A hydraulic accumulator particularly useful in connection with gyratory crushers of the type in which the crusher head and shaft are hydraulically supported so that when the crusher head encounters uncrushable material such as "tramp iron" the crusher head can move down to pass the tramp iron, causing at least some of the hydraulic fluid supporting the crusher shaft to be ejected to a hydraulic accumulator. A plurality of gyrations of the crusher may occur before the tramp iron passes. The accumulator chamber which receives the hydraulic fluid ejected from beneath the crusher shaft contains a gas precharged elastic bladder. Hydraulic fluid is admitted to the accumulator chamber through a poppet valve built into the accumulator structure, which valve is normally spring biased to a closed position against its valve seat.