Abstract: A longwall shearer or other machine with a gear case for transmitting rotational power from a drive to a driven member. The gear case comprises a drive, a driven member, at least one axle including at least one aperture formed therein to circulate cooling fluid through the axle, and a gear mounted to rotate on the axle and positioned to transmit power from the drive to the driven member.

Abstract: A longwall shearer or other machine with a gear case for transmitting rotational power from a drive to a driven member. The gear case comprises a drive, a driven member, at least one axle including at least one aperture formed therein to circulate cooling fluid through the axle, and a gear mounted to rotate on the axle and positioned to transmit power from the drive to the driven member.

Abstract: An assembly includes a structural member or frame that supports a load. The frame has a rectangular opening therein to a cavity within the frame that is adapted to house electrical components therein. There are a plurality of opening screw holes in the frame and spaced apart completely around and outside of the opening. The mining apparatus also includes a cover for the opening, the cover including a plate with an area larger than the opening, the plate having a first surface and an opposite second surface. The cover also includes a lip protruding from the second surface, the lip extending over and around and enclosing an area of the second surface and defining a protrusion that, when the cover is laid over the opening, fits closely within the opening.

Abstract: Apparatus for substantially removing dust created during mining by a mining machine, which has an elongated mobile frame and a laterally extending rotating drum at each end thereof for shearing material to be won from a mine face, from air moving along the mine face. A preferred form of the apparatus includes a housing duct that is attached to the mobile frame between the rotating drums. The housing duct has an inlet and an outlet and is arranged such that the outlet is adjacent the side of the frame that faces the mine face. A screen is supported within the housing between the inlet and outlet and a fan is provided to induce dust laden air to flow into the housing and through the screen. An air deflection barrier and at least one venturi spray are attached to the frame for deflecting dust laden air into the housing inlet.