Abstract: Mantle lifting device (10) has a body (26) configured to selectively engage and disengage an opening (24) of a mantle (12) by rotation in respective opposite directions about a central axis (28) of the body (26). The body (26) is provided with a lifting point (30) which is configured to couple with a lifting device such as a crane (not shown). The body (26) is in the general form of a plug having an upper surface (34) and an opposite surface (36) and tapered circumferential surfaces (38 and 40). The surface (40) is provided with indicia (43) commencing at a distance d on the surface (40) below the edge (42). This is used to indicate safe or unsafe lifting conditions. The indicia (43) being visible when the device (10) is engaged with the mantle (12) is an indication that the mantle (12) is worn to the extent that it may not be safe to lift the mantle (12) by way of the device (10), or at least not without additional safety precautions being taken.

Abstract: Mantle lifting device (10) has a body (26) configured to selectively engage and disengage an opening (24) of a mantle (12) by rotation in respective opposite directions about a central axis (28) of the body (26). The body (26) is provided with a lifting point (30) which is configured to couple with a lifting device such as a crane (not shown). The body (26) is in the general form of a plug having an upper surface (34) and an opposite surface (36) and tapered circumferential surfaces (38 and 40). The surface (40) is provided with indicia (43) commencing at a distance d on the surface (40) below the edge (42). This is used to indicate safe or unsafe lifting conditions. The indicia (43) being visible when the device (10) is engaged with the mantle (12) is an indication that the mantle (12) is worn to the extent that it may not be safe to lift the mantle (12) by way of the device (10), or at least not without additional safety precautions being taken.

Abstract: A jaw assembly for a jaw crusher is disclosed where the assembly comprises a jaw stock (12), a wear plate (16), and a fastening device in the form of a bolt (34) with a square head (42) at one end and a washer (56) and fastening nut (52) positioned at an end opposite to the one end. The bolt (34) extends between the jaw stock (12) and the wear plate (16). The fastening device (34, 42, 56, 52) is operative to adopt a clamped configuration where the device provides a clamping force along a fastening axis to clamp the wear plate (16) at the jaw stock (12), and a released configuration where the fastening device does not prevent the wear plate (16) from being separated from the jaw stock (12). The fastening device (34, 42, 56, 52) is accessible from a direction that is transverse to that fastening axis, to enable the device (34, 42, 56, 52) to be changed from its clamped configuration to its released configuration.

Abstract: A distributor plate (10) is shown for use in an impelling rotor of a vertical shaft impactor (14). Typically the impelling rotor is a chamber (12) arranged to rotate about a vertical axis A-A. Feed materials for breakage are gravity-fed into the rotating chamber (12). These materials strike the rotating distributor plate (10) which is located at the base of the rotor chamber (12). The plate has a substantially planar single-piece upper surface (24) onto which the feed materials are received. This substantially flat surface (24) facilitates rapid and easy expulsion of feed materials there across and out of the rotor chamber (12). The plate shown is a circular disc made of metal carbide. Use of a single-piece upper surface of the distributor plate (10) also will not result in the development of preferential wear sites at corners, edges, join lines etc, as can happen with the known distributor plates.

Abstract: A distributor plate (10) is shown for use in an impelling rotor of a vertical shaft impactor (14). Typically the impelling rotor is a chamber (12) arranged to rotate about a vertical axis A-A. Feed materials for breakage are gravity-fed into the rotating chamber (12). These materials strike the rotating distributor plate (10) which is located at the base of the rotor chamber (12). The plate has a substantially planar single-piece upper surface (24) onto which the feed materials are received. This substantially flat surface (24) facilitates rapid and easy expulsion of feed materials there across and out of the rotor chamber (12). The plate shown is a circular disc made of metal carbide. Use of a single-piece upper surface of the distributor plate (10) also will not result in the development of preferential wear sites at corners, edges, join lines etc, as can happen with the known distributor plates.

Abstract: Prism-shaped anvil blocks (10) are arranged about the inner circumferential wall (12) of a rotating shaft impactor chamber (14). Each anvil block has a planar face 16 oriented to receive material thereonto for breakage. The breakage face (16) of each anvil block (10) is not obscured (that is, shadowed) by an adjacent anvil block (10A), so that the trajectory of travel of material ejected from a rotor (18) is uninterrupted by the shape or position of the adjacent anvil block (10A), to reduce the unevenness of abrasive wear. Each anvil block (10) is retained at the inner circumferential wall (12) by a concealed post (24) which is located on a lateral, inwardly projecting peripheral ledge 26 of the chamber (14). Each post (24) is received in a respective mating cavity (28) formed in each anvil block (10). The ingress of any material into the small gap between the mating cavity (28) and the post (24) is substantially prevented by its concealment, thus avoiding jamming of the anvil.