Abstract: An apparatus for uniformly spreading and mixing coating ingredients deposited on a traffic surface, such as a road, includes a maneuverable, wheeled support carriage, a frame and a power driven finishing assembly. The finishing assembly is provided with a plurality of working tools which are rotated about a central axis to bring the tools sequentially into contact with a traffic surface area being treated to efficiently spread and apply a surface treatment composition. Radially extending arms connect with the working tools and with a central support disc. The arms independently urge the tools toward the traffic surface to maintain the tools in contact with the surface despite surface variations. Adjustable couplings connect the tools to the arms to enable the tools to assume a range of operating angles relative to the arms to further enhance the maintenance of good tool-to-surface contact.

Abstract: An engine-driven trowel includes a handle, a set of blades rotated within a single plane, a blade pitch control unit having a swash plate, a swash plate actuator arm and a pivot pin for pivotally coupling the actuator arm to the trowel. A blade pitch adjustment mechanism includes a lever-actuated cam assembly which engages and deflects the outboard end of the swash plate actuator arm. Up and down movements of the lever rotate the cam and displace the swash plate actuator arm to change the pitch of the trowel blades.

Abstract: A roadway surface patching vehicle is described wherein virtually all roadway patching procedures may be performed by a single operator within a control station of the vehicle unit. The vehicle includes a number roadway repair tools mounted to a moveable carriage on the vehicle frame. This carriage is situated intermediate the control station and the front vehicle wheels. Among the operative tools are a cutter head and a vacuum head adjacent to the cutter head for receiving and directing loose particulate roadway surface material to a storage hopper for subsequent reblending and reuse. The vacuum head may also be used to clean the area adjacent the repair following placement and finished tamping and rolling of the new repair materials. A tamping head is also mounted to the carriage for movement therewith and a roller is mounted to the frame for finishing the repair to grade.

Abstract: A trowel blade assembly attaches to the drive arm of a concrete troweling machine by means of a mounting bar which is bolted to the drive arm. The mounting bar in turn is received by a U-shaped bracket which is bolted to the trowel blade and incorporates recesses formed so as to cover the threaded connections between the blade and the bracket to permit easy removal. A quick release fastener passes through mating holes formed in the bracket and the bar enabling rapid repositioning or replacement of the blade-bracket assembly when one or both of the working edges of the blade are worn.

Abstract: A method and apparatus for coating traffic surfaces is disclosed in which, in lieu of preparing a batch of coating material, the coating ingredients are independently deposited on the traffic surface and a rotary tool with depending blades is brought into contact with the surface to be coated to effectively mix the ingredients while upon the surface so as to rapidly produce, distribute and apply a uniform composition. The apparatus aspect is represented by a machine in which there are various tanks and hoppers for the individual ingredients, with operator accessible controls for starting, stopping and metering such deposits. In addition the machine carries means for rotatably driving the tool, and for raising and lowering the tool to control the nature of blade contact with the surface being coated.

Abstract: An improved concrete troweling blade rotor assembly of the type in which the blades rotate unidirectionally and do not tilt around the blade support axis is provided with means enabling the blade support arms to be independently adjusted with respect to an inner, transverse, horizontal axis passing through each support arm to compensate for machine wear.

Abstract: For trowelling concrete spread over a floor, a trowelling device is used, which includes a carrier having a cantilever arm swingable over the floor. At the distal end of the arm a rotatable trowelling member is carried in a pedestal structure permitting vertical adjustment of the floor contacting parts. A laser sends a horizontal beam at a predetermined level over the floor, and an upwardly directed measuring rod at the housing of the trowelling member is provided with a detector for catching the beam, and for transferring deviations of the beam from a mark thereon into signals for adjusting the position of the trowelling member.

Abstract: An improved water spray apparatus for attachment to a concrete finishing machine. The improved water spray apparatus applies water by misting or spraying water on top of freshly poured concrete as the concrete surface is finished by rotating concrete blades of the concrete finishing machine. The apparatus eliminates the need of applying water separately by water bucket or water hose during the concrete finishing operation.

Abstract: A motor powered rotary trowel employs a plurality of radially arranged trowel blades which can be adjustably tilted on their support arms in either direction and are mounted on a drive shaft which can be driven in either direction thereby enabling the weight of the trowel to be selectively supported on the edges on one side or the other of the trowel blades. In an alternative embodiment, selected parts of the trowel are arranged to fold to facilitate transport.

Abstract: A power driven twin trowel cement finishing machine in which two sets of counter rotating troweling blades have intersecting circular trowling area, each set of troweling blades being carried by a rotatable shaft upon which the blades are supported and arranged for remote relative adjustments from a guiding handle of the sets of troweling blades to vary their troweling angle with respect to the associated cement surface. The two sets of troweling blade assemblies have their rotatable shafts supported for relative tilting movements in opposite directions from a normal generally vertical position to selectively oppositely inclined planes of rotation of the sets of troweling blades in a manner to generate reactive blade forces that will be operative to bodily propel the machine either in a forward or reverse direction, while permitting manual lateral controlled movements of the machine by means of the guiding handle.

Abstract: A mechanized trowel including a center body of an elongated configuration supported for rotational displacement about its longitudinal axis and having a helical troweling blade extending along the surface thereof adapted to engage, spread and trowel a body of cement in its plastic state, a supporting rail extended in parallelism with the center body supporting the center body for linear displacement therealong, and a truck supporting the end of the rail for translational displacement about a further axis perpendicularly related to the longitudinal axis of the center body and passing through the end thereof opposite the truck, and reversible, electrically energizable motors connected in driving relation with the center body for imparting thereto rotational, linear and translational displacement.

Abstract: A rotary power trowel having a safety clutch, a gyroscopic stabilizing ring, blade pitch control, and an adjustable handle. The safety clutch employs a belt tension adjustment to act as a brake on the drive belt when activated either manually or, in an emergency, automatically by a lever on a handle near the operator. When the rotary trowel goes out of control in an emergency, centrifugal force activates the lever and disengages the driving force and acts to brake the belt in less than one turn of the handle. The gyroscopic stabilizer ring lowers the rotary trowel center of gravity and generates a stabilizing effect. Blade tilting is accomplished through a turning knob located at the end of the adjustable handle, which is adjustable to the height of the operator.

Abstract: A concrete floor finisher for finishing newly-placed concrete. The machine comprises a rotor hub, a plurality of rotor arms on the hub for rotation about an axis, a blade pivotable on each arm, and a motor for driving the rotor hub. The pitch of the blades is adjustable depending upon the condition of the wet concrete, by a piston and cylinder centrally located about the axis of rotation of the rotor, and a stud connected at one end to the blades and at its other end engaging a portion of the piston to adjust the pitch of the blades in response to the axial displacement of the piston.

Abstract: A troweling machine having a variable troweling diameter may be constructed by providing such a machine with adjustable length spider arms, an adjustable circumference guard ring, an adjustable length guard ring stabilizer arm and any combination of two of such adjustable features. A universal blade mounting adaptor allows the machine to accept blades of various sized as well as various specific attachment arrangements. A pivotal mount for the guard ring permits it to be swung upwardly from its normal horizontal position.

Abstract: In a surface-working machine, as for troweling fresh concrete, the operator rides on a frame which is carried by surface-working rotors, each having evenly spaced tools or trowels. The application of tilting forces to the working rotors to cause movement of the total machine forwardly or rearwardly or to either side, or turning, or any combination thereof, is controlled by the operator through a single control stick, with all movements of the control stick corresponding to the machine movement desired. If, in a troweling machine, there are only two rotors, their trowels intermesh to work overlapping circles, and no gap is left between the working circles when movement is perpendicular to a "biaxial" plane (common to both rotational axes). This gives maximum width of coverage, and the operator's seat faces in that direction of movement.

Abstract: A concrete finisher of the type having driven paddles surrounded by a peripheral guard ring is made with one or more relieved guard ring sections, each preferably having a flattened outer edge, so that the finisher can be used to finish concrete surfaces adjacent to a wall or other obstruction. In some embodiments the relieved guard ring wall guide section is fixed. In other embodiments it is retractable.

Abstract: Power driven cement finishing apparatus having a plurality of finishing trowel blades rotatable about a common vertical axis, a stationary guard ring being supported from a main frame structure of the apparatus so as to be positioned above and outwardly of the path of rotation of the outer end tips of the finishing blades, and vibration absorbing means being interposed between the guard ring support and the main frame structure, whereby vibrations induced in the guard ring during operation of the apparatus will be dampened and not transmitted to the finishing blades.

Abstract: In a machine for troweling large areas of concrete without having a footprint problem, the operator rides on a frame supported by a plurality of troweling rotors, preferably three. Each troweling rotor has three or four troweling blades, the pitch of which is controlled as before except that the pitch control is extended from all rotors to be jointly controlled, or at least separately accessible to the operator in the operator's seat. In addition, the operator can steer the apparatus in all respects by applying a tilting pressure to one or more rotors with selectivity as to the points along the rotor paths at which the increased downward pressure is applied. For ordinary steering, and for forward or reverse movement control, a control stick is provided which swings universally. Forward or rearward swinging of the stick causes forward and rearward movement. Right or left swinging of the stick causes or adds turning to right or left.