Abstract: A manually operated portable mixing device is provided in which a frame of knockdown construction provides means for rotatably supporting a mixing drum of centrally expanded cylindrical contour in a manner to dispose the drum axis at an angle of about 20 degrees with respect to a support surface, the drum having a large circular opening at one end and being closed at the opposed end, roller means at the rear of the frame engaging an annular groove on an axially protruding bearing member at the closed end of the drum, roller means at the front of the frame engaging outer surfaces of the drum adjacent the open end thereof, a three-sided frame extension of a size to be closely spaced from the periphery of the rotatably supported open drum end, the lower rear portion of the frame detachably supporting wheels in a manner to be slightly elevated with respect to a support surface, and the drum at the centrally expanded portion thereof, having four detachably mounted and radially extended hand-grip members at 90.

Abstract: The invention relates to a rotating drum having a lining which avoids caking-on, the rotating drum being lined with movable elastic material basic webs fitted at a distance from the inner side of the drum and the securing positions of the basic webs being covered over by preferably thinner elastic overlapping webs with bevelled edges.

Abstract: Improved apparatus for mixing concrete or the like is described and includes a support frame, a rotational drive mounted to the frame, a drum liner support rotatably connected to the rotational drive and a drum liner connected to and supported by the drum liner support and comprising a container having one open end for receiving therewithin the material to be mixed.

Abstract: A truck mixer allowing the operator to carry out direct visual control of the loading and unloading operations of the concrete, has the concrete mixer mounted on the truck with its loading and unloading mouth located at the forward portion of the vehicle chassis and arranged substantially above the driver's cab, forward of and below which cab the concrete pumping device for the distribution arm and the associated collecting tank are mounted.

Abstract: A relatively large drum which is supported by rotation about a horizontal axis of rotation is driven by a drive mechanism. The above mechanism includes an energizable rotor that is resiliently and rotatably supported, and in frictional contact with the circumference of the drum, so as to rotate the drum when energized.

Abstract: A process for rejuvenating and recycling used asphalt and a machine including a pugmill mixing chamber for mixing crushed asphalt supplied thereto and for mixing water, calcium oxide and asphalt oil therewith is disclosed. The water and calcium oxide mixture react and chemically combine to form a calcium hydroxide filler material to thus fill the voids and gaps in the rejuvenated asphalt that would otherwise exist. The reaction, being exothermic, increases the temperature of the resultant asphalt based mixture to a level suitable for spreading of the rejuvenated material on a prepared surface. The asphalt oil is preferably preheated using a heat exchanger coil connected to a diesel engine radiator, which coil is immersed in an asphalt oil storage tank carried on the machine so that the viscosity of the oil may be reduced to a reasonable value suitable for pumping to the mixing chamber and spraying on the materials contained therein.

Abstract: An apparatus for heating and mixing an asphalt-aggregate composition comprises a drum rotatable about an axis, having a mixing and heating chamber with a restricted port at one end into which a flame and hot gases of combustion are directed and through which exhaust gases concurrently pass to atmosphere. A heating means comprises a burner for directing flame and the hot gases of combustion into the chamber at the restricted port along the drum axis of rotation and which burner is adjustable relative to the port along the drum axis of rotation. A burner assembly includes an air duct having an air entrainment port located away from substantial exposure to the drum exhaust gases. The drum includes a plurality of pegs extending into the drum chamber. Heating is carried out in a rotating drum without forming a veil or curtain of particulate composition through the hot gases of combustion.

Abstract: A series of treatments are performed on old asphaltic pavement to make it suitable for being satisfactorily applied as a new mat. The old asphaltic pavement is heated and scarified to form a loose aggregate-asphaltic mixture while remaining on the ground surface. The mixture is removed from the ground surface and heated in an elongated rotary housing having heated conductors without direct flame contact with the mixture, and the mixture is then thoroughly mixed with a conditioner for old asphaltic pavement, and finally is reapplied to the ground surface as a new mat. The treatments are carried out by independently operable, portable apparatus during the movement of all of the apparatus in a coordinated train that moves over the ground surface.

Abstract: A front end loading transit mixer is provided in which the opening at the front end thereof is of an optimum diameter while the overall height of the vehicle is maintained within acceptable height limits by locating the operator's cab rearwardly of the front wheel set and laterally offset to one side of the frame of the vehicle. An unobstructed viewing opening is provided in the area extending inwardly from the front end of the frame and located above the front end portion of the frame and below the front section of the mixing drum so that the operator is afforded an unobstructed line of vision in a generally horizontal plane extending through at least 90.degree. in each direction from the direction of forward movement of the vehicle.

Abstract: A method of mixing concrete and containers for providing predetermined quantities of cement and aggregate to be transported to a site for on site mixing of concrete. The containers have two compartments which are self closing due to the weight of the contents, one compartment containing cement and the other aggregate. When placed on a ring-like support the compartments move relatively to release their contents. The hopper of the concrete mixer has a ring-like support to open the containers and has a water spray curtain to prevent the fine cement powder to be taken away by the wind, with the water spray providing the correct amount of water for the concrete.

Abstract: A rotary concrete mixing drum which has a throat area leading to a mixing chamber is provided with a mixing blade which includes a leg portion projecting inwardly from the inner wall thereof and a discharge lip portion and a mixing lip portion. The mixing lip portion projects laterally from the leg portion toward the head end of the mixing chamber and does not extend into the charging throat area. The absence of a mixing lip in the throat area prevents a build up of concrete in the throat area. To facilitate the mounting of the mixing blade, an L-shaped blade segment is first mounted in the mixing drum and thereafter a discharge lip is connected to the L-shaped blade.

Abstract: An improved and more rapid mixing of concrete is achieved in a rotary concrete mixing drum according to the present invention by the simple expedient of providing passages which open through the body of the mixing blade which permit concrete flow therethrough. The flow of concrete through the passages creates added turbulence in the body of concrete during the rotation of the mixing drum in the mixing direction. The concrete is prevented from passing directly through the same mixing passages when the mixing drum is rotated in the discharged direction by mounting deflector blades on the discharge face which extend over the mixing passages and deflect the concrete aggregate away from the mixing passages during rotation of the mixing blades in the discharge direction.

Abstract: A cooler for the transportation and cooling of, particularly, canned beverages including a thermally insulated container having an open end and a retainable cover forming a receptacle for the beverages with a spacer means to hold the canned beverages about the periphery of the receptacle and to form, with the surfaces of the canned beverages, a cavity for a cooling agent, the outer surface of the container being adapted to roll with the cover being retained in sealing engagement. Upon transportation by rolling of the cooler the beverages within the cans are cooled by contact between the cooling agent and the can surfaces forming the cavity.

Abstract: A composite gear of metal and plastic is provided and specifically a composite ring gear for a cement mixer. The ring gear for rotating the mixing drum of a cement mixer is commonly formed by stamping teeth in a metal flange circumjacent an intermediate portion of the mixing drum. Such gears have been noisy and lack impact resistance. The new ring gear comprises a metal flange to which is affixed a plurality of arcuate gear segments of a plastic material having gear teeth formed therein. The teeth of the plastic segments mesh with a drive pinion gear. The composite gear is much quieter and is also more impact resistant during operation. The segments can also be inexpensively and readily replaced, if necessary.

Abstract: A device for the preparation of coated products, particularly, but not exclusively, for the construction and maintenance of highways, from aggregate, finely divided material and a binder, comprising a cylindrical drum having an inlet end and an outlet end and rotatably mounted on a platform so that the inlet end is higher than the outlet end, a mechanism for feeding aggregate and finely divided material to the inlet end of the drum, a burner projecting into the inlet end of the drum, and a fixed chamber at the outlet end of the drum for receiving coated products and for discharge of gases circulating in the drum.