Abstract: A rotary brush floor polisher is provided with an upper and a lower disk member movably connected with each other through a shock absorbing member interposed therebetween, on which lower disk member is fixedly mounted a polishing brush or pad which is rotatably driven by an electric motor to glide over a floor to polish and clean the same. The polisher is characterized by the shock absorbing member each of which is interposed: between the upper and the lower disk member; and between the electric motor and a platform on which the motor is mounted. The shock absorbing member has a simple and compact construction which: realizes reduction in size of the polisher; reduces vibrations and noise in operation; and eliminates a fear that the operator's fingers and like objects are sandwiched between the upper and the lower disk member by mistake in operation to ensure a safety operation of the polisher.

Abstract: A brush pressure system for a cleaning or sweeping machine, particularly of the pedestrian type, has elements for biasing the brush or brushes against the surface to be cleaned or swept, at a desired value and preferably at a controllably variable value. Long springs mounted in spring tubes which are compressed by an electrical actuator are the preferred option. With a controllable brush pressure the cleaning or sweeping machine is more adaptable, can be used for both heavy duty cleaning or scrubbing tasks and light sweeping tasks without the need to for resetting the machine in the factory and without wearing out the expensive brushes or damaging the floor surface.

Abstract: A combined floor cleaning and floor polishing machine comprises a motor housing (1), an inclined operator handle (2), a base (3) with castors (4) and a motor-operated shaft (5) for a rotating disc (7) supporting interchangeably a cleaning pad or polishing pad, so that the machine weight is carried partly on the pad and partly on the castors (4). If the handle (2) is tilted the machine moves laterally to one side or other in dependence upon the direction of tilt. The use of elastomeric torsion blocks (8) to connect the motor housing (1) to the base (3) provides an elastic resistive force in either tilt direction and thus improves controllability of the cleaning/polishing movement in either lateral direction, by a simple, robust and inexpensive construction.

Abstract: The invention relates to a machine having a carriage for movement on a floor surface. The carriage has structure for rocking the carriage with respect to a floor surface. A workhead assembly is pivotably mounted on the carriage for movement between a first working position and a second rest position. A biasing structure acts on the workhead assembly to move the workhead assembly from one of the positions to the other. Rocking of the carriage allows the workhead assembly to move under influence of the biasing structure from one position to the other position.

Abstract: A disk-shaped tool bit (8) of an angle grinder has an annular disk-shaped carrier member covered on its radially outer circumferentially extending surface and on its side face surfaces with abrasive grains. A central through opening extending between the side face surfaces (8a, 8b) serves for attaching the tool bit to the angle grinder. The central through opening has a surface extending between the side face surfaces and tapering inwardly from each side face surface toward the axis of the central opening. The inwardly tapering surfaces form engagement surfaces (8c, 8d), at which an attachment element (11) of a receiving device (7) of the angle grinder bears for securing the tool bit in place. The attachment element (11) does not project outwardly from the side face surface (8b) facing outwardly from the angle grinder.

Abstract: There are disclosed, in combination, a resiliently compressive, porous rotary buffing pad and a pad holder adapted for use in floor polishing machines. The pad holder is of one piece construction and is formed about its perimeter and toward its center with areas which compress the pad to increase friction with a floor during polishing while reducing overall energy requirements. Immediately adjacent to each such compression area the pad holder defines an area which does not contact the pad and which promotes filtering and storage of particulates. This combination, with adjacent integrally connected compression, non-compression areas promotes efficient polishing with reduced energy resulting from the use of discreet compression areas; and dust or particulate absorption and storage within the non-compression areas.

Abstract: An improved method of finishing surfaces having irregular stepped portions or other edges and improved apparatus therefor. The method of the present invention includes rough finishing the surface by utilization, of a rotary tool with a first abrasive pad attached thereto. The first abrasive pad includes an abrasive body portion with an outer peripheral edge. A substantially flexible outer rim portion extends outward from the peripheral edge of the pad. According to a second step of the present invention, finished sanding of the surfaces is accomplished by utilization of a rotary tool with a second abrasive pad attached thereto. The second abrasive pad includes a backing substrate and at least one abrasive segment attached thereto. The total abrasive surface encompassed by the abrasive segment is from about 1% to about 30%.

Abstract: A floor working machine for the treatment of the surface of floors and more especially a floor sanding machine comprises a work plate which rotates during operation. The work plate is connected in a manner transmitting rotation with a holding part arranged above it coaxially, such holding part bearing against the work plate with at least a part of the weight of the machine and being driven by the machine's motor. The holding part is supported adjacent to the center of rotation on the work plate. In this respect work plate is able to be pivoted with a freedom of movement similar to that provided by a ball joint to allow for possible unevenness of the floor. Work plate is arranged furthermore outside the support point opposite to the holding part at a distance allowing the pivotal motion of the work plate and is attached at several attachment points to the holding part, in each case with the necessary degree of axial play.

Abstract: A high-speed conversion for floor treating machines which comprises a wheeled frame, an impeller member attached to the floor treating drive of a floor treating machine for rotation therewith, a plurality of speed accelerators fixedly attached to the impeller member and having an end portion thereof engaging the frame and having an opposite end portion fixedly attached to a roller for engaging a floor treating element support which is rotatably journaled to the impeller member. A floor treating element such as a brush, pad, or sand paper is fastenable to the floor-facing side of the floor treating element support for rotatable engagement to the floors. In operation, the impeller member rotates at a speed up to 300 rpm and the speed accelerators rotate the floor treating element and support at speeds capable of exceeding 2500 rpm.

Abstract: A rotary cutting attachment for removing linoleum, tile, mastic, grout, adhesive and the like from floors. The cutting attachment includes a drive plate, an elastomeric ring, a cutter head, a block plate, six cutter blocks and three cutter inserts per cutter block. The elastomeric ring separates the drive plate from the cutter head and allows the attachment to adjust to the contour of the floor. The drive plate and the cutter head have sets of gears which mesh to transfer rotation of the drive plate to the cutter head. In turn, an offset member of the cutter head mates with an offset bore of the block plate to transfer rotation of the cutter head to the block plate. The six cutter blocks are removably mounted to the block plate and three cutter inserts are removably mounted to each cutter block. Typically, three cutting attachments, each driven by a hydraulic motor, are utilized in concert to remove a floor covering.

Abstract: A coupling device for coupling a floor-treating unit to a rod-like device for guiding the floor-treating unit includes a first coupling part and a second coupling part. The first coupling part is hingedly connected to the elongated rod at a hinge axis and the second coupling part is rotatably mounted on the floor-treating unit for rotatable movement about a generally horizontal rotational axis. The first coupling part is movably positioned in a slot in the second coupling part for movement between a first positional setting in which the second coupling part is locked against rotational movement, a second positional setting in which the rod is movable about the hinge axis to unlock the second coupling part and permit rotational movement of the second coupling part about the rotational axis, and a third positional setting in which the rod is movable about the hinge axis for being lowered over the floor-treating unit in a stored position.

Abstract: A stair cleaning device intended for cleaning the steps and risers of stairs and other confined areas comprises three heads driven by a motor and a belt and pulley system. The belt is toothed on one side and not on the other side so that some slippage can occur. The advantages of this is improved operational comfort and less likelihood of damage to the drive system.