Abstract: A socket seal for a gyratory crusher is comprised of a ring with a pair of lips extending therefrom. The ring can have an outwardly expanding dovetail which is inserted into a slot in the piston or hemispherical bearing socket. The seal prevents downward flow of oil from the lubricated space between the hemispherical bearing ball and socket.

Abstract: A bearing retainer apparatus for a gyratory crusher is comprised of a bearing having a ball, a shaft disposed within the ball, and a plate secured to the shaft. Further, a method of assembling a bearing retainer system for a gyratory crusher includes attaching a bearing retainer plate onto the shaft of the crusher using bearing retainer bolts such that the bearing is clamped onto the shaft.

Abstract: A dust seal system for a gyratory crusher having a shaft and a frame includes a bracket attached to the frame, a dust seal, and a collar. The bracket has a slot into which the dust seal is disposed, and the collar is in contact with the seal during crusher operation.

Abstract: A gyratory crusher uses a new spider arm guard and rim liner arrangement. The spider arm guard and rim liner are retained on the spider by means of a dowel and recess system.

Abstract: A conical gyratory grinder-crusher having a rigidly supported outer frustroconically shaped grinding-crushing member and an inner conical grinding member supported on a wobble mechanism which is in turn adjustably supported by air bellows so as to adjust the spacing between the inner and outer grinding-crushing members defining the grinding-crushing cavity, and therefore the particle size of the ground material. The bottom of the grinding-crushing cavity is closed by a flexible member. The flexible member seals the bottom of the grinding-crushing cavity. A slurry of fines or ground material is discharged from the grinder-crusher through grate discharge outlets provided in the lower portion of the inner conical grinding-crushing member.

Abstract: The residence time of material in the crushing cavity of a conical/gyratory crusher is controlled by providing the crusher with a flow restricting arrangement at the lower end of the crushing surfaces. The flow restricting arrangement includes a frustum, ledges or ring of outwardly directed fingers provided at the lower end of the mantle, which finger are interspaced with inwardly directed fingers provided at the lower end of the bowl liner. The flow restricting arrangement also includes a solid ring or a frustum provided at the lower end of the mantle.

Abstract: A conical gyratory mill for regrinding, milling or fine pulverization of materials, having a milling media, such as milling balls, located in the milling space between a milling bowl and a milling head. The material to be milled is introduced into the top of the milling space and is milled as it descends through the milling space by interaction with the milling balls, milling bowl and head. A fluid is introduced at the bottom of the milling space and is discharged at the top of the milling space, carrying with it material which has been milled to the desired degree of fineness.

Abstract: A protection arrangement for a hopper seal in a conical crusher having a material feed hopper located within the upper portion of the crusher bowl, over the crusher bowl liner. The protection arrangement preventing material and liquid flowing from the hopper into the crusher bowl from flowing against and abrading components of the hopper seal. The protection arrangement including an upwardly extending lip on the bowl liner which is received within a discharge hole in the bottom of the hopper.

Abstract: A retention and positioning device is disclosed for a crusher having a main frame with an upper seat, and an upper frame held in releasably biased relation to the main frame and including a portion engaging the upper seat during normal operation. The retaining and positioning device includes a bracket constructed and arranged for retention upon the upper seat during operation of the crusher, the bracket defining at least one pad aperture, and at least one shock absorbing pad configured for retention in each aperture. During operation of the crusher, when the upper frame is momentarily displaced from engagement with the main frame, the return of the upper frame to the upper seat is cushioned by the at least one pad.

Abstract: A method of operating a jaw crusher having a specified speed, a specific throw, and a specified horsepower draw to achieve a specified crushing force and a resulting crusher throughput capacity includes increasing the throw over the specified level and maintaining or decreasing the speed below the specified level so that the crusher capacity is increased without increasing the crushing force.

Abstract: An apparatus for manipulating horizontal impactor hammers includes a crossbeam and a pair of depending lift arms, each lift arm having a corresponding pivot arm configured to be secured to respective ends of the hammer and to pivot about the lift arm. Once the pivot arms are attached to the ends of the hammer, the crossbeam is elevated, withdrawing the hammer from the rotor and causing the hammer to invert about the pivot axis for reinsertion into the rotor. Provisions are also made for rotating the withdrawn hammer about a vertical axis.

Abstract: A conical crusher designed for high yield, low waste crushing includes a head mantle with a crushing surface having a uniform radius of curvature and a bowl liner with a crushing surface having a uniform radius of curvature, the radius of curvature of the head mantle being distinct from the radius of curvature of the bowl liner.

Abstract: A method for comminuting coral limestone is disclosed. The method utilizes a conical crusher including a housing with a vertically adjustable bowl, a feed assembly and a conical head gyrating with the bowl to define a crushing cavity therebetween, and a waterbox disposed above the feed assembly for creating a low water content slurry of limestone and water and for introducing the slurry into the crushing cavity for more efficient production of cuboidal product.

Abstract: A liner wear plate for a vertical shaft impactor rotor includes at least one wear resistant insert disposed in the liner along a path of wear formed by particulate material passed through said rotor for comminution.

Abstract: A method of conical crushing to achieve the grinding of feed material includes narrowing the crusher setting beyond the specified minimum limit to enable the head to periodically exert high levels of compressive crushing force, interspersed with low pressure relief periods for mixing of the particles, the cycle of crushing periods corresponding with the gyrational cycle of the head. The method also includes increasing the releasing force exerted upon the crusher bowl to promote the grinding action of the crusher at its narrowed setting.

Abstract: A feed prestratification attachment for classifying materials is configured to be secured to a vibrating screen unit so as to encourage stratification and more even distribution of the incoming feed material. The attachment includes a pair of side adapter plates separated by a horizontal mounting bar and a plurality of elongate rods affixed at one end to the mounting bar, the rods dimensioned so that the vibratory movement of the vibrating screen causes the rods to oscillate, thus permitting the rapid passage of undersize particles through the rods and the presentation of those particles to the screen, and enhancing the stratification of near-size and oversize particles.

Abstract: A vertical shaft impact crusher is provided comprising a housing, a rotor mounted within the housing for rotation about a vertical axis and propelling incoming rock outwardly against a crusher ring, wherein the crusher ring is comprised of segments each capable of autogenous, impact or semi-autogenous crushing or combinations thereof in order to precisely control the size and shape of crushed products.

Abstract: A conical crusher having a power draw of approximately 1,000 Hp and capable of being installed in a conventional crusher foundation is provided with an annular frame shell with support means capable of withstanding the higher than normal crushing forces, a hydraulic circuit capable of counterbalancing the crusher bowl while it is in a raised position to allow material to be cleared from a jammed crusher, and a mechanical anti-spin head bushing. A method is provided for increasing the production of conical crushers by altering head throw and diameter, increasing the power draw and increasing the internal volume of the crusher.

Abstract: A method and apparatus of comminuting ore-like material to produce a disproportionately large volume of flakier product which is easily and more efficiently ground in a mill, wherein the method includes the application of a stream of liquid all around the inlet of a conical crusher, increasing the speed and reducing the throw of the crusher to produce a generally flaky product, crushing the ore in the presence of the liquid and passing the ore and liquid slurry directly to a grinding mill.