Abstract: An adjustable drywall corner tool comprising a pair of work engaging blades normally disposed substantially at a ninety degree angle to one another. A hinge extends between mating edges of the blades. A structure is for changing the angle between the two blades, so that the blades will fit in an inside corner of more and less than the ninety degree angle. A handle extends from the angle changing structure, so that a person can grip the handle to apply taping to the corner.

Abstract: A toothbrush comprises two parts (2, 3) which are pivotable relative to one another, of which a first part (2) serves as a handle and of which a second part (3) carries a brush-head (5), a spring (7) being arranged between the parts and having one end (8) fixedly connected to one (2) of the parts and having another end (9) which engages with a wall portion (11) of the second part (3), the second part (3) being pivotable relative to the first part (2) against a pressure exerted by the spring (7) during use of the toothbrush, which spring snaps when a given pressure threshold (P.sub.d) is exceeded, after which the second part (3) is subjected only to a bending load in the absence of a pressure (Q) directed in the longitudinal direction of the spring (7) and exerted by the wall portion (11), and resumes its original position when the pressure has decreased.

Abstract: Improved method and apparatus for scrubbing a substrate are provided, the method including the step of scrubbing one face of the substrate with a cylindrical rotary brush while applying back pressure to the substrate by jetting a fluid for generating back pressure against the other face of the substrate.

Abstract: An electric toothbrush having in its slip-on brush a piston is disclosed, which is set rotating by a motor shaft projecting out of the handle segment. This piston exhibits a lifting cam, by means of which it effects an axial motion relative to the motor shaft in the slip-on brush. This axial motion causes a reciprocating motion of a toothed rack, which sets the bristle tufts of the toothbrush rotating.

Abstract: The present invention provides a pipe interior cleaning apparatus which can be operated at an inexpensive cost and with no special facility required, assuring an improved derusting effect. This pipe interior cleaning apparatus comprises a rod-like guide, knobs provided at opposite ends of said guide, and a cleaning member into which said guide is inserted and which is made to be slidable along said guide.

Abstract: A hydraulically operated toothbrush in which the flow of water from a faucet through the toothbrush handle and into the head produces rotation of a plurality of bristles mounted in the head, the bristles also being mounted for limited axially movement, and including a device for regulating the water pressure within the head to thereby assure the proper rotation of the bristles. The toothbrush may also include a siphoning tube operated by the suction created when water passes into the toothbrush, one end of the tube being inserted into the user's mouth and the other in a discharge basin. The siphoning tube may also be fitted with a mouth rinse fluid cup to introduce small amounts of fluid into the user's mouth during the brushing.

Abstract: Discs and a footpad for devices such as automatic swimming pool cleaners are disclosed. The discs incorporate upwardly-extending, non-truncated fins protruding radially from their peripheries. The peripheries themselves, moreover, define a plurality of tongues for increased flexibility, and both the discs and footpad may include ramped segments facilitating movement over obstacles extending from swimming pool surfaces. Also disclosed are discs having series of slits spaced along portions of their peripheries. Each such disc may be part of an assembly including a "bib," or cap, that too may be slitted if desired. The slits of each component, when present, permit its effective surface area to increase as the associated cleaner climbs the side of a swimming pool, enhancing the maneuverability of the cleaner. By contrast, unslitted portions of the cap seal, or cover, the slits present in the disc to provide adequate suction for the disc against the pool surface.

Abstract: A mechanized vehicle washing apparatus includes top scrubber curtain pivotally mounted to a frame for pivotal movement in a horizontal plane into and out of a path of a vehicle to be washed. The top scrubber curtains may be reciprocated either forwardly and backwardly in directions parallel to the path of a vehicle to be washed or from side to side in directions transverse or angular to the path. The apparatus also may include wrap around brushes pivoted overhead on each side of the frame for pivotal movement into and out of the path of a vehicle being washed. The apparatus further may include high pressure spinner nozzles for high pressure wash and rinse cycles so that the apparatus may be operated in either a touching or a touchless mode. Both the top scrubber curtains and the wrap around brushes preferably employ a deep pile, fur-like material as the washing material.

Abstract: An apparatus for conditioning the surface of spheroidal game balls including a spherical enclosure, a hand crank, an array of fixed, compliant surface-shear pads, a top port for inserting soiled game balls, a rotating disc shaped member to ensure firm contact between game ball and shear pads and propel them along the surfaces of the pads, a reservoir of conditioning fluid covering a portion of pads and disc shaped member and a bottom drain port for flushing out weakened, spent or dirty conditioning fluid.

Abstract: A dental device for an electric toothbrush drive having a drive shaft, the dental device including a housing, a motion converter arranged in the housing and including a rocker arm, a rotary oscillation plate having an eccentrically arranged plug-in opening, and a plug-in axle for operatively connecting the rotary oscillation plate to the rocker arm via the plug-in opening. A guide is provided for releasably and operatively connecting one end of the rocker arm to the drive shaft of the toothbrush drive, and a bearing is provided for rotatably supporting the rotary oscillating plate at the housing. The motion converter converts the movement of the drive shaft into rotational ocillatory movement of the rotary oscillation plate about the plug-in axle.

Abstract: A backing plate for a rotary buffing pad assembly provides cushioned support for a pair of curved edge buffing pads mounted back-to-back. The backing plate is adapted for easy reversible mounting and the cushioned pad support prevents damaging contact by the edge of the rigid backing plate with the surface being finished.

Abstract: A magnetic disc for a cleaning device which is passed through a pipeline having a cylindrical internal wall. The magnetic disc includes a flexible circular disc body perpendicular to the cylindrical wall, the disc body having a plurality of radially spaced openings therethrough. A magnet is installed in each opening in the disc body, each magnet having poles oriented axially with the cylindrical wall. A pair of opposed retainer plates for each magnet are fastened to the disc body to retain the magnet in the disc body and to extend the magnetic field of action.

Abstract: A motor vehicle washing apparatus having a brush assembly and curtain assembly for prolonging the life of the brush assembly and the curtain assembly by adjusting the length of elements of each when wear occurs. The brush assembly includes a plurality of brush elements mounted on a rotatable drum by connectors which are removably received in channels on the outer surface of the drum. The connectors engage selected slots of a plurality of slots in the brush elements to allow for selectively and incrementally adjusting the position of a free end of each brush element. In a similar fashion, the curtain assembly has a plurality of curtain elements mounted on a support rod or on an oscillating semicircular drum. The curtain elements each have a plurality of slots therein for accommodating self-orienting removable locking fasteners permitting selective and incremental adjusting of the position of a free end of each curtain element.

Abstract: A non-metallic pipeline cleaning pig for cleaning a variable diameter pipeline comprises an elongated cylindrical body, front and back cups coupled to the body, and a plurality of generally circular wiping discs coupled to the body between the cups. The wiping discs are disposed in pairs spaced apart from one another. Each disc has plurality of circumferentially spaced fingers respectively separated by a plurality of circumferentially spaced slots. Each finger has a peripheral surface of a given arc length. The number and configuration of the fingers and slots is chosen so that the sum of the arc lengths is approximately equal to the internal circumference of the smallest diameter pipe section encountered.An abrasive may be applied to the fingers to enhance the cleaning action. In addition, cleaning solvent may be jetted from behind the pig to the internal surface of the pipeline in front of the pig.

Abstract: The invention relates to an apparatus for brushing chalk powder off from an eraser surface of a blackboard eraser in which elastic brushes attached to rotatable shafts of rotatable bodies are brushingly engaged with the eraser surface and are rotated in forward and reverse directions by a motor so that the chalk powder removed from the eraser is collected in chalk powder receiving containers. After the passage of a set time interval, the operation of the apparatus is automatically stopped. A chalk powder containing eraser and the now clean eraser inside the apparatus can be exchanged. Thus, dispersion of powder into the room is prevented.

Abstract: A bowling lane dressing apparatus is provided which has a carriage for movement along the bowling lane between the foul line and the pit. Drive wheels are rotatably mounted on the carriage for moving the carriage along the bowling lane by means of drive means connected thereto. A lane buffer roller is journaled on the carriage in lane-contacting relation which extends transversely to the direction of travel. A reservoir is mounted in the carriage for storage of lane-dressing fluid. A transfer roller is mounted in rolling engagement with the lane buffer roller and in fluid communication with the reservoir for transferring fluid from the reservoir to the lane buffing roller. Variable speed drive motor is connected to the drive wheels for rotating them at variable speeds to vary the speed of the carriage as it moves along the bowling lane to vary the rate of transfer of fluid to the bowling lane surface by the lane buffer roller.

Abstract: An improved paint scraper to permit a user minimum arm fatigue and cramping due to the paint scraper including a blade for scraping paint from a surface by pulling or pushing the blade along the surface while the blade is held in pressure contact with the surface.

Abstract: A self-powered pool vacuum with remote controlled capabilities. The vacuum including a head having a lower base in a generally rectangular configuration with side openings extending vertically therethrough and an enlarged leading edge. The head also includes an intermediate cover positionable over the base with a central aperture extending therethrough with an apertured peripheral flange and a gasket positionable between the flange and the base. Also included is a top cover positionable over the intermediate cover and base for constituting a plenum zone. The top cover includes an aperture for coupling to a suction hose and an antennae extending upwardly therefrom. A brush is peripherally positionable downwardly from the lower face of the base. Parallel axles extending transversely through the base with drive wheels on one of the axles. Steering wheels are pivotally coupled to others of the axles with a steering rod for pivoting the wheels to change directions.

Abstract: A flange-cleaning tool unites an actuating disk and integral handle with two cleaning disks in a primary embodiment. Union is achieved with a hub and bushing, both fitted through central circular apertures in the disks. The outward-facing sides of the cleaning disks are lined radially with cleaning elements, which may be, for instance, of the razor, rasp, or sandpaper type. Interspersed with the cleaning elements are debris apertures. The tool is manually or motor-powered, and incorporates a circumferential ratcheting mechanism in the primary embodiment. In a secondary embodiment, the ratcheting mechanism is located radially. Auxiliary devices may be attached for extra leverage, and a reinforcing lip on the handle makes it possible to safely apply a high impact force in difficult cleaning situations.

Abstract: A back washing and scrubbing apparatus comprising a gearbox having an inlet and an outlet with the inlet adapted to be coupled to a water line; a nozzle having an base end and a tip end with the tip end coupled to the outlet; a gear mechanism disposed in the gearbox and coupled to the tip end of the nozzle with the gear mechanism adapted to rotate due to water flow from the inlet to the outlet, thus enabling rotation of the nozzle; a rotating pulsating mechanism disposed within the nozzle for intermittently allowing passage of flowing water from the base end thereof; a perforated surface coupled to the base end of the nozzle to define a shower head for delivering rotating and pulsating streams of water therefrom; and an agitation actuator mechanism adapted to be engagably coupled with the gear mechanism by a bather for intermittently interrupting its rotation, thus enabling agitated rotation of the shower head.