Abstract: A custom bumper for plowing snow is hingeably mounted to a frame of a vehicle that can be lowered to the surface of the road for plowing snow, then retracted back to its original position as a vehicle bumper, by the vehicle operator utilizing hydraulics controlled from inside the vehicle.

Abstract: A unified broadcast encryption system divides a media key tree into S subtrees, divides digital content into segments, and converts some of the segments into variations; the number of segments and variations is q. The system subdivides each of the subtrees into q/|S| subdivided subtrees, assigns a key media variant to each of the subdivided subtrees, and generates a unified media key block (MKBu). The system decrypts digital content by obtaining required key media variants from the MKBu, using the key media variant to find an entry in a variant key table, decrypt a title key, and locate a variant number from the variant key table. The system uses the variant number to identify which of the variations may be decrypted by the title key and uses the title key to decrypt segments and variations.

Abstract: A system and method for controlling access to a work vehicle includes limiting an unauthorized operator's access to the work vehicle by disabling an engine subsystem and additionally limiting access to another vehicle system such as an auxiliary fluid actuator, by disabling at least one of the auxiliary fluid actuators. In this manner, even if a thief hot wires the engine of the work vehicle, he will not be able to use the work vehicle since the engine and the fluid actuators and the fluid controller that controls the actuators are independently disabled.

Abstract: The invention relates to an apparatus and method for directing a low turbulence vehicle-mounted air blast for use in clearing snow or debris from a road or runway. An air blast system is mounted in the central portion of the vehicle underneath the chassis. An air duct is positioned on either side of the truck adjacent to a channel which passes under the truck. The air ducts are designed with minimal curvature and internal baffles in order to minimize air flow turbulence. During operation, the channel and air duct are lowered toward the ground and high velocity air passes through the channel. A vacuum is created which draws snow or debris from the runway, out of the air duct, and away from the truck. When turnaround is required at the end of a runway, the operator simply lifts the air duct currently in operation and lowers the air duct on the other side of the truck.

Abstract: The invention relates to an apparatus and method for directing a low turbulence vehicle-mounted air blast for use in clearing snow or debris from a road or runway. An air blast system is mounted in the central portion of the vehicle underneath the chassis. An air duct is positioned on either side of the truck adjacent to a channel which passes under the truck. The air ducts are designed with minimal curvature and internal baffles in order to minimize air flow turbulence.

Abstract: A road and/or airport runway scraping blade for use with a ground supported vehicle, which scraping blade includes a frame for attaching the scraping blade to the vehicle. The scraping blade has a front facing side, a rearward facing side, a top edge and a bottom edge, both edges extending laterally of a longitudinal axis of the vehicle when coupled to the vehicle. Coupling structure is provided for facilitating a coupling of the frame to the vehicle with the rearward facing side facing the rear of the vehicle. An elongated conduit and a fastening structure is provided for fastening the conduit to the rearward facing side of the blade intermediate the coupling structure and the bottom edge of the blade. A longitudinal axis of the conduit extends generally parallel to the lower edge. A plurality of laterally spaced spray nozzles are provided and are oriented along a length of the conduit and communicating with an interior of the conduit.

Abstract: A portable pneumatic cleaning device for removing particulate material from crevices and channels particularly between component parts of railroad switch mechanisms, is provided which has a heavy duty nozzle including a central port and a pair of outwardly divergent side ports having axes which are coplanar with the axis of the central port for discharging a pressurized stream of air in a generally fan-shaped pattern along a surface to be cleaned when the device is connected to a pressurized air source. The device has an elongated body portion and end portions formed at an angle therewith and parallel to one another, and includes a switch for controlling the flow of air therethrough, a runner to maintain the nozzle at a spaced distance from a surface to be cleaned, and a handle to facilitate manual use of the device.