Abstract: Techniques are disclosed relating to thermal control implemented by a power management unit. In some embodiments, the power management unit itself is configured to monitor thermal conditions, implement control for one or more thermal loops, and send reduction alerts, via an inter-chip interconnect, to the processor circuitry it powers. In some embodiments, the power management unit implements both thermal and electromigration control loops. Disclosed techniques may advantageously reduce or avoid thermal issues, potentially with reduced impact on processor performance relative to traditional techniques.

Abstract: A cutting bit assembly for a mining machine includes a holder having a first surface, a second surface, and a bore extending therebetween, and a bit having a first end and a second end. The bit further includes a tip, a shank, and a shoulder positioned between the tip and the shank. The shank is positioned in the bore of the holder and defines a shank axis. The shoulder engages the first surface of the holder. The shank includes a projection adjacent the second end. The cutting bit assembly also includes a retainer having a groove and a resilient member. The groove engages a portion of the projection. The resilient portion engages the second surface of the holder and biases the retainer along the shank axis and away from the holder.

Abstract: A pick tool comprising a strike tip and a pick tool body, the pick tool body including a non-rotating strike tip at a first end of the pick tool body. A shaft is provided at a second end of the pick tool body, the shaft being configured to pass through an opening in a surface of a pick tool holder, the shaft being configured in use to be non-rotationally attached to the pick tool holder. The shaft projects from a pick tool abutment surface such that, when the pick tool is attached to the pick tool holder, the abutment surface abuts the pick tool holder surface. The abutment surface has an aspect ratio between its length and width of between 1.5:1 and 3:1. The pick tool body comprises a leading edge and a trailing edge, the leading edge being, in use, the edge that first contacts a formation, the trailing edge having an angle of less than 18° between a main axis of the pick tool and an axis from the strike tip to the abutment surface at the trailing edge.

Abstract: A cutting bit assembly for a mining machine includes a holder having a first surface, a second surface, and a bore extending therebetween, and a bit having a first end and a second end. The bit further includes a tip, a shank, and a shoulder positioned between the tip and the shank. The shank is positioned in the bore of the holder and defines a shank axis. The shoulder engages the first surface of the holder. The shank includes a projection adjacent the second end. The cutting bit assembly also includes a retainer having a groove and a resilient member. The groove engages a portion of the projection. The resilient portion engages the second surface of the holder and biases the retainer along the shank axis and away from the holder.

Abstract: A chain driven by two sprockets spaced a short distance apart along their common axial centerline. The chain includes elongated pins that extend beyond the outer surfaces of the chain link plates, on both sides, by a distance about equal to the width of the spaced apart sprockets. The chain is aligned midway between the sprockets, and the sprocket teeth drive on the extended portion of the chain pins. Where a flight is attached to the chain links, the pins are extended still further, to fit into the indentations or holes in the flights. This provides an exposed length of each pin in alignment with the sprocket on each side for driving purposes. The chain has a piece extending between the plates to reduce the likelihood of a pin extending further outside of one side plate or the other. A shoulder on the pin further reduces the likelihood of this happening.

Abstract: A chain driven by two sprockets spaced a short distance apart along their common axial centerline. The chain includes elongated pins that extend beyond the outer surfaces of the chain link plates, on both sides, by a distance about equal to the width of the spaced apart sprockets. The chain is aligned midway between the sprockets, and the sprocket teeth drive on the extended portion of the chain pins. Where a flight is attached to the chain links, the pins are extended still further, to fit into the indentations or holes in the flights. This provides an exposed length of each pin in alignment with the sprocket on each side for driving purposes. The chain has a piece extending between the plates to reduce the likelihood of a pin extending further outside of one side plate or the other. A shoulder on the pin further reduces the likelihood of this happening.

Abstract: An operator's cab for a shuttle car including a cab frame, a window assembly, and a pressurization system. The cab frame defines an interior chamber and an opening. The window assembly includes a pane and a pane seal. The pane is coupled to the cab frame such that the pane covers the opening and encloses the interior chamber. The pane seal is positioned between the pane and the cab frame. The pressurization system provides a positive pressure in the interior chamber relative to the surrounding environment. The pressurization system includes a blower and a motor for driving the blower. The blower is in fluid communication with the interior chamber.

Abstract: A movable machine includes a frame, an electrical motor on the fame, a cable electrically connected to the motor and adapted to be connected to a source of power, and a sheave bracket assembly coupled to the frame. The sheave bracket assembly includes two mounting plates, two spaced apart sheaves rotatably mounted on the mounting plates, a hinged portion coupled to the mounting plates and pivotally coupled to the frame, and at least one biasing member located between the frame and the mounting plates that biases the mounting plates and sheaves toward a first position.

Abstract: An operator's cab for a shuttle car including a cab frame, a window assembly, and a pressurization system. The cab frame defines an interior chamber and an opening. The window assembly includes a pane and a pane seal. The pane is coupled to the cab frame such that the pane covers the opening and encloses the interior chamber. The pane seal is positioned between the pane and the cab frame. The pressurization system provides a positive pressure in the interior chamber relative to the surrounding environment. The pressurization system includes a blower and a motor for driving the blower. The blower is in fluid communication with the interior chamber.

Abstract: A method and apparatus for controlling a mobile machine during start-up. The mobile machine has a prime power source, a means for transport, and at least one auxiliary system; the means for transport and the at least one auxiliary system are controllably driven by the prime power source. The method and apparatus includes determining an actual angle of steering of the mobile machine, comparing the actual angle of steering with a desired angle of steering, starting the prime power source, enabling engagement of the at least one auxiliary system, and disabling engagement of the means for transport in response to the difference between the actual angle of steering and the desired angle of steering being greater than a predetermined threshold value.