A decorative concrete with a very uniform finish surface and a method of fabricating the same is disclosed. A concrete mixture is poured over a subgrade which defines an exposed surface. The exposed surface is finished with any of several techniques, and the surface is then worked with an abrasive material, and additional techniques are used to color and seal the concrete.

Powered concrete finishing apparatus including a working head for working the concrete. The working head has a rotatable working surface having a ring shape in contact with the concrete during a finishing operation. The concrete finishing apparatus further includes a motor for driving the working head to perform a rotational working movement on the concrete during the finishing operation. The working surface comprises a clearance for allowing concrete to aggregate within said clearance. The clearance is free of additional working surfaces contacting the concrete during the finishing operation, such as blades, pans, floats or arms, thereby providing an improved finishing of the concrete.

A power unit is configured for use as part of a concrete screed and includes a frame and a powered drive. The frame includes a drive housing. The powered drive is operably supported by the drive housing and is configured to rotate a rotatable concrete forming drum. The powered drive includes an electric motor and a battery operably coupled to the electric motor and configured to power the electric motor. The powered drive includes a drive shaft drivingly connectable relative to the drum, with rotation of the drive shaft causing corresponding rotation of the drum.

An adaptor assembly for concrete finishing trowels that enables efficient polishing of concrete surfaces, and trowels equipped with said adaptors. A large, rigid, circular adaptor disk supports a plurality of spaced-apart polishing rotors that project into contact with the concrete surface being treated. Each polishing head is rotatably secured to the adaptor disk with a spindle assembly including suitable alignment bearings. The spindle assembly secures a rigid header beneath the adaptor disk that sandwiches a resilient, annular coupler between itself and a rigid driver plate beneath the coupler. Bosses on the coupler insure spacing and enable proper flexure. The driver plate removably mounts a resilient finishing ring, that supports a plurality of radially spaced apart, downwardly projecting, diamond-equipped pucks that frictionally bear against the concrete surface for abrading and polishing.

A mounting adapter for rotatably mounting a tool holding body having first and second surfaces on at least one spider arm of a motor driven rotatable spider assembly of a surface processing apparatus. The mounting adapter includes a disc with a flex pad dimensioned to rest on a portion of the disc upper surface between a disc aperture and a disc rib. A drive ring has an inner periphery which mechanically engages an outer periphery of the disc.

A method for thermal management of a power trowel executable by an on-board logic controller allows operation of the trowel in normal mode in which rotor speed is determined by manual control and in which a sensed temperature of the trowel lies below a high temperature setpoint. In response to the sensed temperature exceeding the high temperature setpoint, the controller switches operation of the power trowel from normal mode to thermal management mode in which a maximum rotor speed achievable by manual control is reduced by the controller in incremental steps to allow the trowel to cool. In response to the sensed temperature reaching a low temperature setpoint, the controller increases rotor speed in incremental steps, and returns operation to normal mode when a desired rotor speed is maintained for sufficient time during which the sensed temperature remains below the low temperature setpoint.

Control of a self-powered floor preparation machine is provided by an ergonomic controller having a guarded control stick which has various characteristics, including its pitch, roll, yaw and height, that may all be adjusted.

A power unit is configured for use as part of a concrete screed and includes a frame, a powered drive, and a mechanical control connection. The frame includes a drive housing and a handle to be grasped by a user, with the handle being configured to facilitate manual advancement of the concrete screed in a forward direction. The handle includes a grip and a relatively shiftable user-operated drive controller. The powered drive is operably supported by the drive housing and is configured to rotate a rotatable concrete forming drum.

A power unit is configured for use as part of a concrete screed and includes a frame, a powered drive, and a drive coupler. The frame includes a drive housing and a handle to be grasped by a user, with the handle being configured to facilitate manual advancement of the concrete screed in the forward direction. The handle and the drive housing are pivotally attached relative to each other so that the handle is swingable relative to the drive housing about a pivot axis that is transverse to the forward direction. The powered drive is operably supported by the drive housing and includes a rotatable drive shaft. The drive coupler is attached to the drive shaft and is removably attachable to the connection shaft of a rotatable concrete forming drum so that rotation of the drive shaft is imparted to the connection shaft. The drive coupler is configured to align the drive and connection shafts on a common rotation axis without permitting off-axis swinging of the shafts relative to one another, such that swinging of the drive housing relative to the drum is at least substantially restricted.

A device and method device for continuous mixing and laying of cementitious coating onto a substrate. There is a first mixing stage for metering and mixing a first liquid and a second liquid to create a first mix and a second mixing stage for metering and mixing the first mix with aggregate to form a second mix. The first and second mixing stages use flow meters and flow controllers for metering and restricting the flow of the first liquid, the second liquid and aggregate. A controller operatively coupled to the flow meters and flow controllers controls the mixing in a closed-feedback arrangement. A screed box applies the second mix onto the substrate to create a flooring layer. The flooring may be in a food processing plant.