Abstract: A surface of a workpiece is treated by rotating about an axis a brush having a multiplicity of radially projecting bristles with tips engaging a surface of a workpiece to be treated while positioning a stop nonrotatable with the brush in engagement with the bristles radially inward of the stop so as to rearwardly deflect the bristles prior to contact with the workpiece and thereby store kinetic energy in the bristles so that as the bristles pass the stop the kinetic energy is released and the bristles spring elastically forward and percussively strike the workpiece surface. A roughness of the workpiece surface is determined and the stop is positioned radially relative to the axis or the brush is positioned relative to the workpiece at a spacing in accordance with the determined roughness.

Abstract: The subject of the present invention is a rotationally drivable rotary tool device and in particular a rotary brush tool. The invention is equipped, in its basic construction, with a tool holder (1, 2) having at least one drive-side clamping element (1) and a tool-side clamping element (2). The two clamping elements (1, 2) are connected releasably together and receive a rotary tool (5, 6). Furthermore, the two clamping elements (1, 2) ensure that the rotary tool (5, 6) is held. According to the invention, the tool-side clamping element (2) and the rotary tool (5, 6) define a structural unit (2, 5, 6). To this end, the clamping element (2) in question is configured as a holding cage (2) that encloses the rotary tool (5, 6) radially and axially at least in part.

Abstract: The present invention relates to a brush unit (3) and to an associated rotary brush tool. The brush unit (3) is equipped with a brush holder (10, 11), which can be driven in rotation, and with an annular brush (4, 5) with a bristle-covered rim (8) with outwardly protruding bristles (5). Furthermore, a stop means (14) which dips into the rotating bristle-covered rim (8) is provided. According to the invention, the stop means (14) simultaneously acts as an abrasive body (14) for the bristles (5). In this case, a distinction is made between both functions (stopper function and abrasive function) according to a direction of rotation (R) of the annular brush (4, 5) and/or a setting position of the stop means (14) as compared to the bristle-covered rim (8).

Abstract: A power-brush apparatus has a housing and a brush rotatable on the housing about a brush axis and having bristles extending generally radially of the axis and having tips defining on rotation of the brush a circular orbit centered on the axis. The tips are engageable at a location with a workpiece surface. In accordance with the invention a blocking element is positioned radially inside the orbit immediately upstream from the location in a normal rotation direction of the brush. A drive rotates the brush in a working direction about the axis relative to the housing at a predetermined angular speed in the direction and thereby orbits the tips of the bristles about the axis such that the bristles engage the blocking element, are slowed thereby, and when released thereby snap back to accelerate forward and strike the workpiece at an augmented speed.

Abstract: The subject of the present invention is a rotary tool (1) for surface treatment. This is equipped with a brush holder (3) which can be driven in rotation for an annular brush (4) with a brush strip (5) and bristles (6) protruding outwardly from the brush strip (5). According to the invention, coolant for the cooling thereof is supplied to the brush holder (3) and/or the annular brush (4).

Abstract: A power-brush apparatus has a housing, a brush rotatable on the housing about a brush axis and having bristles extending generally radially of the axis, and a drive that rotates the brush in a working direction about the axis and thereby orbits tips of the bristles about the axis. Thus when in use the brush is rotated in this working direction. A support immediately adjacent the housing carries a rigid grinding wheel having an abrasive outer surface. This wheel is biased radially against the bristle tips to sharpen and clean them while a drive relatively displaces the bristle tips and the grinding-wheel surface while the wheel is urged against the bristle tips such that the grinding wheel surface primarily engages rear sides of the bristle tips turned away from the working direction.

Abstract: A rotary tool for surface machining has a disk having an elastomeric outer periphery, an array of angularly spaced elastomeric teeth projecting radially and each having a formation forming a hinge so that the tooth can flex at the hinge.

Abstract: A surface-treatment wheel has an inner element rotatable about an axis, and an outer ring fixed rotationally on the inner element, centered on the axis, and formed unitarily with an annular array of radially outwardly projecting teeth defining outwardly open notches, and respective angularly extending webs or ridges in the notches.

Abstract: A rotary tool for the erasure-type abrading of adhesive residues and foil, in particular, from lacquered metal surfaces has an outer tooth crown of rubber or an elastomeric synthetic resin, the teeth being bendable. The tooth disk is mounted on a disk-shaped holder which is rotatably driven and is coupled to the latter by an inner crown.

Abstract: A rotatable brush can have its steel bristles anchored in an endless bendable band which fits on a spacer sleeve of a holder bridging two end disks thereof. The disks can have axial ribs which are spaced from the sleeve and pass through gaps in the bristles. On these ribs or the spacer at least one axial groove is provided in which a key of the band is engaged. The key can be a clip or staple holding the ends of the band together.

Abstract: A handbrush for upholstery and carpets can have its brush body formed with at least one elastically bendable bristle band colinear with a handle and provided with bristles which can project forwardly on the band.

Abstract: A brush assembly adapted to be rotated about an axis has a brush having a flexible, annular and generally cylindrical collar generally centered on the axis and having a predetermined and generally uniform radial thickness, a predetermined inside diameter, and a predetermined axial length, and a plurality of arrays of radially projecting bristles angularly equispaced about the collar and defining a plurality of axially throughgoing and angularly equispaced bristle-free zones.

Abstract: A brush assembly adapted to be rotated about an axis has a brush having a flexible, annular and generally cylindrical collar generally centered on the axis and having a predetermined and generally uniform radial thickness, a predetermined inside diameter, and a predetermined axial length, and a plurality of arrays of radially projecting bristles angularly equispaced about the collar and defining a plurality of axially throughgoing and angularly equispaced bristle-free zones. A holder drum has a core having an outer surface centered on the axis and having a predetermined outside diameter substantially smaller than the inside diameter of the collar, inner and outer end flanges axially flanking the core paced axially apart by a predetermined axial distance greater than the axial length of the collar so that the collar is received with axial play between the flanges, and respective retaining tongues extending axially between the flanges in the bristle-free zones of the brush.