Abstract: An example high pressure ice-breaking machine with a double row of wheels comprises: a frame, a plurality of wheels, and a plurality of spring mechanisms. The plurality of wheels comprises: a front ice-breaking wheel group and a rear ice-breaking wheel group. The plurality of wheels include a total of two rows of wheels, which include a front ice-breaking wheel group and a rear ice-breaking wheel group. The plurality of wheels are positioned horizontally under the frame. The front ice-breaking wheel group and the rear ice-breaking wheel group include a same number of wheels. The two rows of wheels are staggered in double rows from front to back. A first ice-breaking wheel from the front ice-breaking wheel group and a second ice-breaking wheel from the rear ice-breaking wheel group form a staggered wheel pair, and the first ice-breaking wheel and the first ice-breaking wheel are hinged to a same spring mechanism.

Abstract: A roadway clearing device includes a plurality of rotatable members for dislodging material (snow or ice) from a roadway and a conveyer disposed rearward of the rotatable members to collect and laterally discharge material from the roadway. The device may include a plurality of shovel members disposed rearward of the conveyor to divert material from the roadway to the conveyor for lateral discharge. The rotatable members and/or shovel members may be disposed for separate movement from corresponding downward positions to upward positions relative to an interconnected support frame. Spring-loaded, extensible members may be provided to bias the rotatable members and/or shovel members to their corresponding downward positions.

Abstract: A sleeping bag having double shells, an inner shell and an outer shell both open at one and the same side, each preferably differentially cut so that the sleeping bag is narrow at the bottom or foot end than at the upper end, and having insulating material between said shells, said shells being closed along said open side by a pair of off-set slide fasteners, said off-sets providing effective closing off of any leakage through the fasteners of the warmed air inside the sleeping bag and the entry of cold air from the outside and providing both a dead air space between said double fasteners and insulated pads to cover the two closures.