Abstract: A mobile apparatus with a fluid pressure-operated implement mounted at a distal end of a boom includes a connection apparatus for selectively rotating the implement about an actuator axis at the distal end of the boom. The connection apparatus includes a rotary actuator and a pressurized fluid circuit for delivery of pressurized fluid through the rotary actuator to the implement. The pressurized fluid circuit includes channels establishing a fluidic connection axially through the rotating shaft of the rotary actuator. The pressurized fluid circuit facilitates passage of pressurized fluid through an internal, protected environment to the implement.

Abstract: An apparatus, such as for tree trimming, includes a mobile carriage having a frame and a pedestal supported by the frame. The apparatus further includes a boom, such as a telescoping boom that is secured to the pedestal through a boom support. The pedestal is pivotable with respect to the carriage frame so that the boom may be selectively operated in a variety of orientations. The mobile carriage of the apparatus is sufficiently compact to fit though tight openings, while also being capable of stably supporting boom extension for operation of a distal end of the boom at elevated heights.

Abstract: A mobile apparatus with a fluid pressure-operated implement mounted at a distal end of a boom includes a connection apparatus for selectively rotating the implement about an actuator axis at the distal end of the boom. The connection apparatus includes a rotary actuator and a pressurized fluid circuit for delivery of pressurized fluid through the rotary actuator to the implement. The pressurized fluid circuit includes channels establishing a fluidic connection axially through the rotating shaft of the rotary actuator. The pressurized fluid circuit facilitates passage of pressurized fluid through an internal, protected environment to the implement.

Abstract: An apparatus, such as for tree trimming, includes a mobile carriage having a frame and a pedestal supported by the frame. The apparatus further includes a boom, such as a telescoping boom that is secured to the pedestal through a boom support. The pedestal is pivotable with respect to the carriage frame so that the boom may be selectively operated in a variety of orientations. The mobile carriage of the apparatus is sufficiently compact to fit though tight openings, while also being capable of stably supporting boom extension for operation of a distal end of the boom at elevated heights.

Abstract: An apparatus, such as for tree trimming, includes a mobile carriage having a frame and a pedestal supported by the frame. The apparatus further includes a boom, such as a telescoping boom that is secured to the pedestal through a boom support. The pedestal is pivotable with respect to the carriage frame so that the boom may be selectively operated in a variety of orientations. The mobile carriage of the apparatus is sufficiently compact to fit though tight openings, while also being capable of stably supporting boom extension for operation of a distal end of the boom at elevated heights.

Abstract: An apparatus, such as for tree trimming, includes a mobile carriage having a frame and a pedestal supported by the frame. The apparatus further includes a boom, such as a telescoping boom that is secured to the pedestal through a boom support. The pedestal is pivotable with respect to the carriage frame so that the boom may be selectively operated in a variety of orientations. The mobile carriage of the apparatus is sufficiently compact to fit though tight openings, while also being capable of stably supporting boom extension for operation of a distal end of the boom at elevated heights.

Abstract: An apparatus, such as for tree trimming, includes a mobile carriage having a frame and a pedestal supported by the frame. The apparatus further includes a boom, such as a telescoping boom that is secured to the pedestal through a boom support. The pedestal is pivotable with respect to the carriage frame so that the boom may be selectively operated in a variety of orientations. The mobile carriage of the apparatus is sufficiently compact to fit though tight openings, while also being capable of stably supporting boom extension for operation of a distal end of the boom at elevated heights.

Abstract: A track tensioning system for a tracked vehicle having both a frame with left and right side members as well as left and right tracks that are both configured to translate along the ground to move the vehicle includes left and right wheel plates located substantially adjacent to a respective side member. Left and right wheels are coupled to the respective left and right wheel plates. The left and right wheels are coupled to the left and right tracks and rotate on a rotational axis so that, as the tracks translate along the ground, both wheels rotate with the tracks. For providing track tensioning to the tracks, each wheel plate pivots against the respective side member of the frame on a pivot axis that is displaced form the rotational axis. The left and right wheel plates may pivot in substantially parallel pivot planes. The substantially parallel pivot planes may be vertical. The left wheel plate may pivot around a left pivot axis and the right pivot plate may pivot around a right pivot axis.

Abstract: A track tensioning system for a tracked vehicle having left and right tracks includes a biasing system for simultaneously providing track tensioning to both tracks by biasing each track through a track-tensioning arc. The biasing system may include a linear force-generating system for generating a track-tensioning force. The linear force-generating system may for example be a spring or a piston and cylinder assembly. The biasing system may also include a pivoting rocker arm assembly for transmitting the track-tensioning force from the linear force-generating system to the tracks.

Abstract: A tree-trimming apparatus mounted on a mobile support vehicle. The apparatus includes a telescoping boom pivotally mounted on a pedestal. The pedestal is pivotally mounted to a turntable which is rotatably mounted on the support vehicle. An operator's station is mounted on the pedestal to provide control of the apparatus. A large diameter circular saw is mounted at the end of the boom and is powered by a high speed hydraulic motor to provide high cutting efficiency. A fiberglass boom and electrically non-conductive hoses provide maximum safety for the operator.