Abstract: A toothbrush for use in simultaneously brushing and cleaning the occlusal, lingual and buccal surfaces of the upper and lower teeth of a user. The toothbrush, in the preferred embodiment, is power-driven and includes bristle support member which anchors bristles from opposite surfaces thereof. The bristles are arranged in longitudinal rows including central rows, intermediate rows and outer rows. The central rows are straight while the intermediate and outer rows are curved for engaging the lingual and buccal surfaces. The bristles are shaped and arranged in a heating chamber while being anchored to the bristle support member.

Abstract: An electric toothbrush comprises a manually guided handle and a brush member having a brush head with a plurality of separately rotating bristle holders which are connected in the brush head to gearing driving them. The bristle holders are mounted in an insert which is insertable into the brush head in a releasable manner so as to be easily exchangeable by the user. Each of the bristle holders has a coupling element in the form of a cam which is insertable, by way of a plug-in connection, in a respective groove in a connecting rod which is connected to a drive means in the handle.

Abstract: A device for cleaning cylindrical objects such as bolts has a sleeve (1) which contains a rotor (2) equipped with a brush (7). A bolt is inserted into the sleeve (1), and the rotor (2) is rotated by a motor (4) to clean the periphery of the bolt. The sleeve (1) is connected to a suction means of negative pressure such as blower (11), and the motor (4) is capable of rotating the rotor (2) in one or the other direction. In the cleaning device a bolt is enclosed in the sleeve (1) and is cleaned with the brush (7) which is driven in contact with the peripheral surface of the bolt by the rotation of the rotor (2). Dust and dirt generated by the cleaning are prevented from leaking out of the sleeve and collected in the suction means of negative pressure. As the rotor (2) rotates in one or the other direction by the motor (4), furthermore, the rotating direction of the brush (7) is set to meet the direction in which the lead of the thread of the bolt advances.

Abstract: An electric motor-driven toothbrush comprising a holder having a motor device and a toothbrush member which has a lever releasably adapted to the holder in a cantilever configuration. The toothbrush member has a number of brushing hairs or `fillings` each of which is thin and resilient, implanted at a brush head portion and a transducer device which converts a rotational movement of a rotor of the motor to a reciprocal linear movement in the direction crossing at right angles to a rotational axis of the rotor. The transducer device is provided at and adjacent to the head portion. The head portion of the brush member is finely and linealy reciprocated at a high speed along the longitudinal direction of each filling.

Abstract: An electric toothbrush has a reciprocating connecting rod in a brush member. The brush member is constructed as a brush head at its front end and has there two rows of rotatable bristle holders which each engage with a cam in a transversely running groove in the connecting rod. Rectilinear movement of the connecting rod leads to an alternating rotating movement of the bristle holders.

Abstract: A shampoo or massage device includes a pistol grip handle having therein rechargeable batteries. A housing perpendicular to the handle includes partition walls providing a plurality of axially spaced cavities or compartments in which a dc motor, a gear reduction unit and a rotary-to-reciprocating conversion unit are mounted. The cavities housing the batteries, motor and gear reduction unit are sealed against the entry of moisture. A body engaging assembly or brush is mounted on the output of the rotary-to-reciprocating conversion unit and carries a plurality of fingers generally parallel to the housing axis.

Abstract: This invention relates to an automatic chalk-powder collecting device for blackboard eraser; it mainly comprises a body portion, two symmetrical side covers, a powder box, and a powder-collecting assembly. By means of the aforesaid structure and a one-way brake switch in the powder-collecting assembly, the rollers of this invention are controlled to rotate in one direction only. When the present invention is erasing a blackboard back and forth same as a conventional eraser does, the chalk powder on the rubbing cloth can be cleaned automatically and simultaneously. It is deemed that the present invention has greatly improved the drawbacks of the conventional eraser, which must be beaten or cleaned repeatedly in use to cause a lot of powder flying in the air.

Abstract: A chalk dust remover is disclosed to remove the chalk dust which has accumulated on the surface of a chalk board cleaner. The device has a housing, a perforated support member, and a sheet of porous, open cell foam material which extends over the support member and is attached to the housing. The chalk board cleaner is rubbed over the foam material which causes the chalk dust to be removed and passed through the foam material and the perforated support, and into a receiving chamber within the housing. The foam material is releasably attached to the housing by engagement with a hook portion of a releasable hook and loop type fastener.

Abstract: An improved blackboard eraser used for automatically erasing the chalk dust comprises a housing, in which several sets of brushes and rollers in number corresponding to the brushes are installed. The rollers are made of suitable chalk-erasing material and the bottom contacts the brushes, so that the brushes can erase the chalk dust on the rollers, then they let the chalk drop down into the trough, when the rollers are rotating. This method avoids the chalk dust flying in the air. The gear means are installed on each side of the rollers. Furthermore, the gear means are connected with the idle gears on two sides of the housing to form a gear system. The RPM between the rollers are different due to the different number of the gear teeth between the gear means and the idle gears; then a friction effect is generated because of the different speeds between them, so that the erasing effect for the blackboard is improved.

Abstract: An automatic dust-removing eraser of a rolling-friction type for use on a blackboard includes: a casing body having an open section or cavity in the central portion; a plurality of different guiding slots vertically formed at both ends of the side walls defining the open section; a spare space provided at each end portion with an escape clack valve and a discharge door respectively disposed in the opposing side walls defining the spare spaces; a pair of supporting members each having integrally-linked parallel plates respectively secured in the guiding slots of the casing body; and a plurality of master rollers and slave rollers mounted within the cavity in interrelated coupling; so that, by means of the matched rotation of the master and slave rollers and the unilateral check action effected from the supporting members, the chalk dust gathered by the master rollers over the surface of the blackboard is automatically removed through self-brushing and discharging action of the slave rollers.

Abstract: A blackboard eraser comprising a base, an uppermost cover mounted on the base, two erasing rollers pivotedly mounted within the base, a controller and two scrapers wherein the controller normally engages with the rollers for erasing use and may be depressed to release the rollers for their free rotation to contact the scrapers formed atop the rollers so as to scrape the dust accumulated on roller into a storing chamber spaced between the base and the uppermost cover for final disposal of dust.

Abstract: Blackboard eraser having a handle made of foamed plastic. Discreet rows of fiberglass filaments for cleaning off the chalk are secured to the bottom of the handle. Channels between the rows collect dust during the erasing operation so that the fibers don't clog. Preferably, the channels are closed off to prevent dust from falling away during erasing. The channels are self-cleaning in that the dust falls away when the eraser is placed on the sill.

Abstract: A novel structure for a blackboard eraser is provided wherein the eraser comprises a plurality of raised rows of two or more different erasing mediums such as brushes, fiber or cloths laterally spaced and extending parallel on a base support to form an eraser body. The body is connected at its two ends to a resilient dust-collecting frame flush with the raised erasing mediums so that when erasing the blackboard with the eraser the latter completely encloses the corresponding part of the blackboard, guiding the dust along the spaces between adjacent raised rows of erasing mediums and then collecting them in the frame, thereby preventing the dust from flying about and polluting the air. A chalk container may further be formed at the lower part of the eraser for holding the chalks.