Abstract: A coaxial powder-feeding nozzle includes a partition wall-type shell, a powder flow area, a cooling liquid flow area and a shielding gas conveying channel. A powder self-cleaning filter is on the outer side of the partition wall-type shell; the powder self-cleaning filter includes a set of powder collecting tubes on each side of the partition wall-type shell in the axial direction; each set of powder collecting tubes includes at least one powder collecting tube; under the coaction of a suction force applied by a powder collecting system and the self-weight of residual powder, a residual powder inlet of each powder collecting tube causes the residual powder on the opposite side to roll down to the bottom along the wall surface of a metal tube to be processed on the same side, and to be gathered at the front end of the residual powder inlet of the powder collecting tube.

Abstract: A sliding connecting member for a shelter framework includes a sliding connecting member having a lever connected to a cam. When pulled or rotated, the lever pulls out a locking pin from an aperture in a leg member. In this respect, releasing the locking mechanism allows the sliding connecting member to slide along the leg member and the framework can be folded or unfolded.

Abstract: A dedusting device and method is disclosed for the dry or moist dedusting (i.e., cleaning, dusting, or removal of dirt, dust, or other debris) from components, e.g., of motor vehicles. An exemplary method may generally include positioning a dusting tool driven by a drive motor in a predetermined dusting position such that the tool contacts or touches the component, and determining a first operating variable of the drive motor of the dusting tool when positioning the dusting tool in the predetermined dusting position. The first operating variable may reflect a mechanical load of the drive motor due to the contact with the component to be dusted. The method may further include calculating a corrected dusting position as a function of the predetermined dusting position and the first operating variable of the drive motor, and positioning the dusting tool in the corrected dusting position.

Abstract: A floor sweeper is disclosed having a removable debris compartment. The compartment has a front portion that is at least partially open. A pair of counter-rotating brushes are located forward of the debris compartment for delivering debris directly through the front portion into the debris compartment. A cover that strips debris from the brushes and that also directs stripped debris extends over the brushes. The cover has an air spoiler forward of the brushes. A strip for blocking debris is located opposite of the cover and is located substantially entirely the length of and between the brushes.

Abstract: A debris collecting device includes a rotatable drum 4 having a plurality of radially extending tynes 5 and a rake adapted to cooperate with the drum, the rake having dual arcuate shaped blades, including a debris releasing blade 7 and a reversing blade 9 adapted to contiguously contact either side of the drum over the whole length thereof at the respective leading edges thereof. The blades include elongate slots 11 adapted to intersect and accommodate the travel path of the tynes as the drum rotates such that debris pierced and picked up by the tynes rotating in a first direction is dislodged for transfer to a catcher 2.

Abstract: A positioning structure of a beach umbrella is provided that includes a positioning apparatus to connect with a lower tube of the umbrella. The apparatus has a flat plate for forcing the lower tube being inserted into ground easily. A handle has a rod to engage with apertures on the tubes of the shaft that can adjust the height of the beach umbrella as desired for increasing utility.

Abstract: A device for removing sand, solid particulate wastes and the like from a surface being cleaned, comprising spade-shaped members driven in a closed rotatory circuit cooperating with a brush in synchronized sweeping motion. In a first embodiment, a rotatory belt mounting a plurality of circumferentially spaced apart spade-shaped collector elements cooperates to receive material swept by a single brush in pendulum arcuate motion and then elevates the waste for deposit into a storage container for later disposal. In a second embodiment, the sweeping action is provided by the reciprocating motion of a first rotational belt mounting a plurality of transverse, circumferentlally spaced-apart rows of brushes and the receiving and elevating is done by a second belt mounting an array of circumferentially spaced-apart spade-shaped collector elements.

Abstract: An apparatus for collecting litter from the ground includes a frame adapted for movement along the ground, a hopper mounted at one end of the frame; and a collector assembly supported on the frame. The collector assembly includes a pair of rollers having a plurality of flexible fingers disposed radially on the periphery thereof, the rollers being substantially parallel to each other and disposed in a plane that is substantially parallel to the ground. The rollers are arranged so that the fingers on one of the pair of rollers intermesh with the fingers of the other of the pair of rollers so as to be able to lift litter between them. The apparatus further includes a device for conveying litter lifted by the pair of rollers to the hopper.

Abstract: A hand held device for sweeping cloth and other surfaces and to convey the sweepings to a self-contained dust pan. An endless flat belt rotating on two pulleys of unequal diameter supports a plurality of transverse brushes which do the sweeping and conveying. Rotation is derived from a motor contained within the larger pulley. The motor is driven by direct current batteries when the operator presses a switch in the handle. The smaller pulley resides near an opening in the housing. The brushes, one after another sweep through the opening picking up any residues on the surface being brushed and conveys them onto a flat surface which is parallel to the conveying leg of the belt. This plate cooperates with the brushes to convey the particles of residue to the center of the dust pan. Gravity traps the particles beneath the conveying plate in the dustpan until dumping is accomplished. The brushes continue on through a comb, on around the main pulley and back to the opening for another stroke.

Abstract: An apparatus for collecting litter from the ground includes a frame adapted for movement along the ground, a hopper mounted at one end of the frame; and a collector assembly supported on the frame. The collector assembly includes a pair of rollers having a plurality of flexible fingers disposed radially on the periphery thereof, the rollers being substantially parallel to each other and disposed in a plane that is substantially parallel to the ground. The rollers are arranged so that the fingers on one of the pair of rollers intermesh with the fingers of the other of the pair of rollers so as to be able to lift litter between them. The apparatus further includes a device for conveying litter lifted by the pair of rollers to the hopper.

Abstract: A method and apparatus for cleaning rubber deposits from surfaces such as airport runways and roadways is disclosed. The apparatus includes a large vehicle that has the capacity to be loaded so as to effectively add weight to rubber cleaning tires of the vehicle. In addition, the vehicle has a water tank and sprinkler system so that the surface may be wetted down in front of the tires as the vehicle proceeds across the surface. The cleaning tires of the apparatus are aligned so that they are at a yaw angle to the direction of travel, and the cleaning tire assembly is attached to the underside of the trailer of the vehicle and positioned between a forward and rear water tank. In addition this tire assembly is equipped with a means of loading the tires onto the contaminated surface.The method comprises driving such a vehicle at low speeds down the surface as the road is being wet in front of the cleaning tires.

Abstract: An improved cleaning apparatus for use in cleaning the floor which comprises a first belt as a broom, a second as a mop and a trash containing corner whereby as the cleaning apparatus is pushed the wheels, the conveyor belt and wiping belt are driven so as to perform the functions of sweeping, wiping, and effectively protecting the trash from dropping therefrom.

Abstract: A conveying mechanism for sweeping debris from a surface and which includes a chute having a lower edge spaced from the surface and along which the debris is moved by an endless carrier having a plurality of spaced sweeper or broom members. An endless flexible sheet material extends vertically from the chute into contact with the surface to be swept and upwardly therefrom along the chute so as to prevent debris from being urged forwardly of the chute and further cooperates with the endless carrier to transport debris along the chute to a collection receptacle.

Abstract: A vehicle, such as a self dumping dirt truck or a trailer, is equipped with a powered assembly of components to automatically clean debris from roadside ditches or irrigation ditches, preferably powered by the truck engine, a tractor engine, or an auxiliary engine, which in turn drives a hydraulic pump of a hydraulic system powering several hydraulic motors. The debris, dirt, gravel, and weeds, are loosened and collected from the ditches alongside a road and then conveyed to a dirt collecting chamber of the trailer or truck. At times if the debris is not objectionable it may be discharged back near the roadbank but removed from the ditch area.