Rotatable Mixing Chamber Reversible For Delivery Patents (Class 366/44)
  • Patent number: 10543839
    Abstract: A cruise control system for a vehicle having an engine and a power take-off throttle control capable of controlling the speed of the engine includes a cruise control device in communication with a speedometer of the vehicle and the power take-off throttle control. The cruise control device includes a processor configured for receiving a user selection of a set ground speed, determining a current ground speed of the vehicle, via communication with the speedometer, comparing the current ground speed with the set ground speed, and taking further action to maintain the current ground speed close to the set ground speed. The further action taken by the processor may include transmitting an acceleration signal or deceleration signal to the power take-off throttle control to increase or decrease a speed of the engine if the current ground speed is determined to be lower or higher than the set ground speed.
    Type: Grant
    Filed: September 24, 2015
    Date of Patent: January 28, 2020
    Assignee: Shem, LLC
    Inventors: William L. Dolesh, Eric Amback, Gerhard Engelbrecht, Christopher Rood
  • Patent number: 9574046
    Abstract: In a method of forming a polyaryl polymer, a fluorosulfonate-containing monomer is coupled with itself or a boron-containing comonomer in the presence of a catalyst and a base. The resulting polymers can be used as precursors to electrically conducting polymers, and as components of resist or underlayer compositions for photolithography, among other applications.
    Type: Grant
    Filed: August 18, 2015
    Date of Patent: February 21, 2017
    Assignee: DOW GLOBAL TECHNOLOGIES LLC
    Inventors: Matthias S. Ober, Arkady Krasovskiy, Patrick Hanley
  • Patent number: 9481107
    Abstract: A dual spiral mixing fin assembly adapted to mix and guide material contained in a rotatable mixing drum of a type used in a transit concrete vehicle mixing system, the assembly includes dual spiral mixing fins extending transversely along a drum mixing space attachable to the inner surface of a mixing drum. The fins are provided with a plurality of spaced large openings for allowing mixed concrete and charged ingredient materials to migrate along a drum mixing space through the openings in both a forward and rearward direction. The fins also have a plurality of spaced small openings that accommodate the passage of cleanout materials along a drum mixing space. A plurality of strut members are attached to forward portions of the mixing fins and adapted to be fixed to the front interior surface of a mixing drum.
    Type: Grant
    Filed: January 30, 2015
    Date of Patent: November 1, 2016
    Assignee: Con-Tech Manufacturing, Inc.
    Inventors: Brian R. Meldahl, Jay Attleson, Garwin B. McNeilus
  • Patent number: 9233482
    Abstract: A batch mixer for mixing concrete materials into a mixed concrete includes a mixing drum having a plurality of paddles fixed to the drum for rotation with the mixing drum about the longitudinal axis of the mixing drum. The paddles include mixing paddles oriented to urge the concrete materials away from the outlet opening at the second end of the drum when the mixing drum is rotated in the mixing direction, and at least one shearing paddle which is oriented at less than 25 degrees from the longitudinal direction of the mixing drum. The shearing paddles has a main body portion interrupted by shearing apertures through which concrete material are directed and an inner edge which is discontinuous and interrupted by longitudinally spaced teeth.
    Type: Grant
    Filed: March 7, 2013
    Date of Patent: January 12, 2016
    Inventor: Mark E. Wallgren
  • Patent number: 8864364
    Abstract: The present invention relates to a drum drive for a truck mixer with a vehicle drive train and a mixing drum, wherein the drum drive can be driven by at least one electric motor.
    Type: Grant
    Filed: February 4, 2010
    Date of Patent: October 21, 2014
    Assignee: Liebherr-Mischtechik GmbH
    Inventor: Gerhard Zenne
  • Publication number: 20140269146
    Abstract: A mixing drum system is disclosed. The mixing drum system includes a mixing drum connected to a frame, wherein the mixing drum is configured to rotate about a first axis with respect to the frame. The mixing drum system further includes a motor connected to the frame and having an output shaft, wherein the output shaft is configured to rotate about a second axis that is displaced from the first axis. The mixing drum system includes a first wheel connected to the output shaft of the motor, and a second wheel connected to the mixing drum. The mixing drum system includes a belt wrapped around the first wheel and the second wheel. The motor is configured to rotate the first wheel, which drives the belt, and the belt is configured to rotate the second wheel, which rotates the mixing drum with respect to the frame.
    Type: Application
    Filed: March 15, 2013
    Publication date: September 18, 2014
    Applicant: OSHKOSH CORPORATION
    Inventors: Thomas J. Harris, Clint Glunz
  • Patent number: 8287173
    Abstract: A rotary concrete mixing drum (16) for a vehicle (10) having a drivetrain (18) for rotating the drum (16) includes a wall (33) having an opening (67) and a hatch cover assembly (37/200) removably closing the opening. The hatch assembly (200) may include a hatch cover (202) coupled to a panel (204) by bolts (212).
    Type: Grant
    Filed: August 15, 2003
    Date of Patent: October 16, 2012
    Assignee: McNeilus Truck and Manufacturing, Inc.
    Inventor: Anthony J. Khouri
  • Patent number: 8162529
    Abstract: A rotary concrete mixing drum (16) includes an interior surface (74) at least partially provided by a polymer (90) impregnated with a slip agent.
    Type: Grant
    Filed: June 29, 2004
    Date of Patent: April 24, 2012
    Assignee: McNeilus Truck and Manufacturing, Inc.
    Inventors: Anthony J. Khouri, William Rodgers, William Tippins
  • Patent number: 8070348
    Abstract: A concrete mixing drum includes a wall having at least one projection (32a, 32b) integrally formed as part of a unitary body with the wall. The at least one projection extends from the inner surface of the wall and includes a tapered base region proximate the inner surface of the wall.
    Type: Grant
    Filed: August 15, 2003
    Date of Patent: December 6, 2011
    Inventor: Anthony J. Khouri
  • Patent number: 8070349
    Abstract: A concrete mixing drum includes a wall having a first section (41) and a second section (43). The first section (41) extends in a spiral along an axial centerline (31) of the drum. The second section (43) extends in a spiral along the axial centerline (31) of the drum adjacent to the first section (41).
    Type: Grant
    Filed: August 15, 2003
    Date of Patent: December 6, 2011
    Inventor: Anthony J. Khouri
  • Patent number: 7997786
    Abstract: A heating and cooling cup includes a cup body, a stirring device, a heating and cooling chip, and a heat sink module. A heat conductive block is disposed under the cup body, the heat conductive block abuts against the heating and cooling chip, the stirring device has a stirring rod disposed in the cup body, and a bottom surface of the heating and cooling chip abuts against a heat conductive block of the heat sink module. A temperature of the cup body is changed through the heating and cooling chip, for cooling or heating liquid food in the cup body, and the liquid food is forced to generate convection through the stirring rod for accelerating a temperature variation process.
    Type: Grant
    Filed: July 24, 2008
    Date of Patent: August 16, 2011
    Assignees: Teck-Huat Chua
    Inventor: Pei-Chuan Liu
  • Patent number: 7967496
    Abstract: A batch mixer comprises a mixing drum rotatable about a longitudinal axis extending between an inlet opening and a discharge opening at opposing ends of the drum. Mixing members and transfer members supported in the drum mix the material when rotated in a first direction and transfer the material to the discharge opening when rotated in an opposing direction. An inlet chute for charging the drum and a discharge chute for emptying the drum communicate with the inlet opening and the discharge opening respectively. The inlet chute pivots relative to the drum about a vertical axis from a charging position in communication with the inlet opening to an access position in which the inlet opening is unobstructed by the inlet chute. The inlet end wall locating the inlet opening therein is removable for greater access.
    Type: Grant
    Filed: September 14, 2007
    Date of Patent: June 28, 2011
    Inventor: Mark E. Wallgren
  • Patent number: 7931397
    Abstract: Auxiliary fluid tanks associated with transit concrete mixing and dispensing systems are disclosed which include a hydraulic reservoir tank which is adapted to be stowed inside a mixing drum support pedestal. The hydraulic fluid reservoir tank further includes a shaped outer wall defining an enclosed inner space and includes one or more fluid discharge and return connections in the outer wall. The tank is also provided with an internal baffle shape in line with the fluid return connections such that it is addressed by returning hydraulic fluid and deflects and defuses the returning hydraulic fluid so that it thoroughly mixes with cooler reservoir fluid. An auxiliary water tank can also be nested beneath the hydraulic fluid reservoir tank under the hollow support pedestal.
    Type: Grant
    Filed: February 27, 2007
    Date of Patent: April 26, 2011
    Assignee: McNeilus Truck and Manufacturing, Inc.
    Inventors: Thomas G. Lindblom, Bryan S. Datema
  • Patent number: 7850364
    Abstract: A concrete batch plant is disclosed including a frame and a transit mixer drum having an open end and a closed end. The drum is configured to be utilized both with the concrete batch plant and on a transit mixer truck. The drum may be pivotally coupled to the frame of the concrete batch plant for movement between a first position in which the open end is positioned to receive cement from a cement supply and to receive aggregate from an aggregate supply and a second position in which the open end is positioned to discharge the mixed cement and aggregate. Further, the drum may be a polymeric drum including an interior surface formed by a plurality of complementary molded helical polymeric sections joined along a helical seam.
    Type: Grant
    Filed: May 18, 2005
    Date of Patent: December 14, 2010
    Assignees: McNeilus Truck and Manufacturing, Inc., Favco Composite Technology (US), Inc., Favco Truck Mixers International Pty Limited, Composite Technology R&D Pty Limited
    Inventors: Thomas J. Harris, William D. Tippins, Anthony J. Khouri, William Rodgers
  • Patent number: 7784995
    Abstract: A method of manufacture of a vehicle mounted rotary concrete mixing drum of the type having an opening at one end for receiving and/or discharge of concrete therefrom and at the other end, means for engaging a drive assembly so as to rotate the drum for mixing or discharging concrete.
    Type: Grant
    Filed: May 31, 2003
    Date of Patent: August 31, 2010
    Inventors: Anthony Khouri, William Rodgers
  • Publication number: 20080205188
    Abstract: Auxiliary fluid tanks associated with transit concrete mixing and dispensing systems are disclosed which include a hydraulic reservoir tank which is adapted to be stowed inside a mixing drum support pedestal. The hydraulic fluid reservoir tank further includes a shaped outer wall defining an enclosed inner space and includes one or more fluid discharge and return connections in the outer wall. The tank is also provided with an internal baffle shape in line with the fluid return connections such that it is addressed by returning hydraulic fluid and deflects and defuses the returning hydraulic fluid so that it thoroughly mixes with cooler reservoir fluid. An auxiliary water tank can also be nested beneath the hydraulic fluid reservoir tank under the hollow support pedestal.
    Type: Application
    Filed: February 27, 2007
    Publication date: August 28, 2008
    Applicant: McNeilus Truck and Manufacturing, Inc.
    Inventors: Thomas G. Lindblom, Bryan S. Datema
  • Patent number: 7144170
    Abstract: A device for applying a coating comprising a multi-component cartridge comprising at least two cylindrical cartridges, each cylindrical cartridge comprising an aperture and an open filling end that is disposed opposite the aperture and that is slidingly sealed by a cartridge piston seal, a static mixing nozzle in fluid communication with each aperture, and at least one paint applicator selected from the group consisting of a roller, a brush and a spray tip, in fluid communication with the nozzle, wherein at least one flexible hose is disposed between and in fluid communication with the cartridge and the nozzle.
    Type: Grant
    Filed: December 6, 2004
    Date of Patent: December 5, 2006
    Assignee: Richard Parks Corrosion Technologies, Inc.
    Inventors: Richard Parks, Heather Parks
  • Patent number: 7064314
    Abstract: A concrete-dispensing counter for ready mix trucks for measuring the volume of concrete discharged by a ready mix concrete truck. The concrete-dispensing counter for ready mix trucks includes a prime mover having a drum being rotatably mounted thereupon and also having a discharge chute through which cement is dispensed from the drum; and also includes a light emitting/reflecting assembly being mounted to the prime mover and including a plurality of light reflectors being spacedly attached about an exterior of the drum opposite to the discharge chute and also including a light-emitting member and a light-detecting member being mounted to the prime mover; and further includes a microprocessor being connected to the light-emitting and the light-detecting members; and also includes a concrete-dispensing sensor being attached to the discharge chute and to the light emitting/reflecting assembly and to the microprocessor for actuating the light emitting/reflecting assembly and the microprocessor.
    Type: Grant
    Filed: June 22, 2001
    Date of Patent: June 20, 2006
    Inventors: Jerome Poole, Anthony Poole, Jr., Lonita Poole
  • Publication number: 20030202418
    Abstract: A cementing apparatus includes a readily transportable chassis, such as that of a convention cement truck or a trailer, a rotatable mixer, a holding tank for receiving material extruded from the mixer, a pump that receives and pressurizes material from the holding tank, and an outflow conduit for directing the pressurized material to a desired location. The cementing apparatus may also include a fluid inflow system for pressurizing and directing fluid from an external source into the mixer. In addition, a valve may be positioned at an appropriate location to shut off the flow of material from the mixer through the outflow conduit and to cause fluid from an external source to flow through the outflow conduit. The apparatus may be used to mix and pump cement slurry into a drill hole through an outflow conduit and to pump displacement fluid into the drill hole through the same outflow conduit.
    Type: Application
    Filed: April 30, 2002
    Publication date: October 30, 2003
    Inventor: Edward J. Scartezina
  • Patent number: 5683177
    Abstract: A transporter-mixer for bulk-material/liquid mixtures has a cylindrical transport container mounted on a support frame with its longitudinal axis approximately horizontal and a controllable container-drive unit whose direction is reversible as a function of the angle of rotation. Fitted on the transport container periphery is a closable loading hatch which opens into the transport container. Mounted on the transport container's inside wall is a mixing screw and at a rear end of the container is an annular discharge channel with an inwards-facing discharge port. The mean height of the mixing screw is, at the most, 15% of the container diameter and a curved, enclosed guide channel of essentially constant cross-section connects the annular discharge channel and a central discharge port.
    Type: Grant
    Filed: February 26, 1996
    Date of Patent: November 4, 1997
    Assignee: Imk Ingenieurkontor fuer Maschinenkonstruktion GmbH
    Inventors: Frank Hoferichter, Frank Herrmann, Holger Dietrich
  • Patent number: 5605398
    Abstract: A rigid cover attached to the chute of a cement truck can prevent the accidental discharge of cement residue from the chute of the cement truck while the truck is moving. The use of a rigid cover prevents the bending of the cover under the weight of the cement residue. The rigid cover can be attached to an over-chute portion of the chute such that when the over-chute rests upon the main chute, the rigid cover can be positioned to prevent the accidental discharge of cement from the chute or can be flopped on top of the over-chute. The rigid cover is designed to hold back a substantial amount of cement residue.
    Type: Grant
    Filed: August 31, 1995
    Date of Patent: February 25, 1997
    Inventor: Jeff Cronquist
  • Patent number: 5492402
    Abstract: The present invention is a combination trailer and self propelled vehicle which combines the maximum gradeability of all wheel drive with the ability to be efficiently and conveniently towed by conventional means at maximum permissible highway speeds. As this invention relates to concrete mixing, it provides an advance in the ability to get to a job site quickly and then efficiently transport and place concrete mix at the job site.
    Type: Grant
    Filed: January 23, 1995
    Date of Patent: February 20, 1996
    Inventor: Rex Alton
  • Patent number: 5380085
    Abstract: A horizontal drum concrete batch mixer comprising a cylindrical mixer drum which may be rotated in a mixing direction or a discharge direction. The interior of the drum has mixing blades provided thereon for mixing the concrete when the drum is rotated in its mixing direction. The interior of the drum is also provided with transfer blades which transfer the mixed concrete from the inlet end of the drum to the discharge end of the drum when the drum is rotated in its discharge direction. A discharge chute is movably positioned in the discharge opening formed in the discharge of the drum and is movable from a discharge position to a mixing position. A plurality of spaced-apart discharge blades are secured to the interior of the drum adjacent the discharge end thereof for delivering the mixed material into the discharge chute when the discharge chute is in its discharge position and the drum is rotated in its discharge direction.
    Type: Grant
    Filed: April 12, 1994
    Date of Patent: January 10, 1995
    Inventor: Robert C. Milek
  • Patent number: 5232282
    Abstract: A food waste mixing and heat treating vehicle used in feeding hogs has a wheeled chassis. A mixing drum is rotatably mounted on the chassis having an inner wall forming a mixing and heating cavity and having an opening into the cavity. Means are provided for rotating the mixing drum. Two opposing helical mixing blades are each affixed along the inner wall from the opening into the cavity for drawing the food waste into the cavity from the opening, mixing the food waste in the cavity and evacuating the food waste out of the cavity through the opening. Steam injecting means are along the inner wall within the cavity for injecting steam through the food waste for heat treating the food waste for later feeding hogs after the food waste has cooled. The method involves the collecting, heat treating and feeding of the food waste to hogs with the vehicle. The hog lot for raising and feeding hogs the heat treated food waste comprises a plurality of adjacent elongate pens with a juxtaposed feed pen there along.
    Type: Grant
    Filed: July 8, 1992
    Date of Patent: August 3, 1993
    Inventor: Daniel E. Johnson
  • Patent number: 5039226
    Abstract: A trailer for transporting and mixing concrete or similar products, comprising a wheeled frame and a mixing drum mounted to the wheeled frame for rotation in a first direction for mixing concrete and in a second direction for discharging concrete from the drum. A unidirectional driving connection is provided between a wheel of the frame and the mixing drum for rotating the drum in the concrete mixing direction as a result of movement of the wheeled frame. An electric motor is also provided on the frame for rotating the drum in the concrete discharging direction.
    Type: Grant
    Filed: August 21, 1989
    Date of Patent: August 13, 1991
    Inventor: Gilles Lavoie
  • Patent number: 4846581
    Abstract: A rear discharge concrete mixer vehicle having a chassis comprising a cab for the vehicle operator; control means in the cab for operation of the vehicle; a rotary drum on the vehicle chassis; a discharge chute associated with the rotary drum; and auxiliary control means on the chassis for operation of the vehicle remote from the cab.
    Type: Grant
    Filed: April 7, 1987
    Date of Patent: July 11, 1989
    Assignee: Osterlund Inc.
    Inventors: Jan A. Osterlund, Leroy C. Scatchard
  • Patent number: 4792234
    Abstract: The invention comprises a mobile concrete batch plant transportable by highway as a single unit. A cement storage hopper, a cement weigh hopper, and an aggregate weigh hopper are mounted on a standard trailer bed. The cement hopper is loaded to the desired weight from the storage bin, and the aggregate hopper is loaded as desired by a front end loader. A charging conveyor carries discharged cement and aggregate from the hoppers to a point above two oppositely facing mixing drums. The charge is dumped from the conveyor into a load hopper, and from there into a load diverter which directs it into a selected one of the two drums. Water and admixture are added and the mixing drum rotates, mixing the contents and producing concrete. The finished concrete is removed from the drum by reversing the rotation thereof, and is carried from the plant by a discharge conveyor. A second batch may be begun while the first is being mixed or discharged.
    Type: Grant
    Filed: January 6, 1986
    Date of Patent: December 20, 1988
    Assignee: Port-A-Pour, Inc.
    Inventor: Jerome J. Doherty
  • Patent number: 4730934
    Abstract: In a mobile mixer, preferably having counterrotational emptying, for building materials, in particular concrete, in a mixing drum (1) which, on its inner wall (9), has one or more flat elevators (11, 12) following a helix and extending from the closed drum base (2) to the drum opening (3), which elevators (11, 12) are driven about the drum axis during rotation of the mixing drum and push the building material to the front of the closed base (2) during transport and during mixing, with one or more flat sections (26, 27) which are helically curved about the mixing drum axis (4) being fixed for driving during the mixing drum rotation (5) in the mixing drum space enclosed by the elevators acting as mixing spirals (11, 12), which flat sections (26, 27) are arranged counterrotationally to the mixing spirals (11, 12) in such a way that, during the transport and during the mixing of the buiding material (13), they produce a counterflow in the building material filling core surrounded by the mixing spirals (11, 12).
    Type: Grant
    Filed: June 9, 1987
    Date of Patent: March 15, 1988
    Assignee: Friedrich Wilh. Schwing GmbH
    Inventor: Gerhard Schwing
  • Patent number: 4506983
    Abstract: A portable dry bulk material storage and mixing unit comprising a generally cylindrical drum mounted on a frame for rotation about a generally horizontal axis and having a conical discharge nozzle with a cylindrical discharge opening at one end thereof. The drum interior is fitted with three flights of helical material mixing and discharge fins having a helix angle of approximately 45.degree.. The drum discharge nozzle extends into a hopper disposed at the rear of a truck on which the frame is mounted. An adjustable valve closure member is operable to be disposed over the discharge opening and includes a handwheel for adjustably positioning the closure member to vary the discharge flow area.
    Type: Grant
    Filed: February 1, 1982
    Date of Patent: March 26, 1985
    Inventor: Leonard D. Marr
  • Patent number: 4462690
    Abstract: The invention relates to a process and an apparatus for the production of applicable coating material for coating road surfaces, by which the old coating material together with aggregates and/or new coating material is mixed in a mixer device provided on a vehicle and is heated in an indirect manner. The apparatus comprises a mixer drum arranged on a vehicle rotatable along its longitudinal axis and including a heating device extending along a substantial portion of the drum length as well as guide fins provided at the interior circumference thereof rotating in a first direction of rotation the material in the mixer drum and in a second direction of rotation conveying the mixed material out of the mixer drum.
    Type: Grant
    Filed: January 21, 1982
    Date of Patent: July 31, 1984
    Inventor: Reinhard Wirtgen
  • Patent number: 4403865
    Abstract: A mixing apparatus having a rotatable drum with a horizontal axis of rotation and an input and a discharge end. The drum supports a number of first mixing wings which upon rotation of the drum in the mixing direction convey the material to be mixed towards the input end and upon rotation in the opposite direction towards the discharge end. There are also a number of second mixing wings having a V-shaped cross-section forming a chute-shaped first side directed towards the discharge end and a roof-like second side. The second mixing wings are attached to the first wings in such a position that the chute-shaped first sides are below the first wings to carry material falling off the first wings towards the input end when the drum rotates in the mixing direction, and so that the roof-like second sides are below the first wings as a consequence of the rotation of the drum in the discharge direction so that the material falling down on the second sides leaves the second wings sideways.
    Type: Grant
    Filed: February 4, 1981
    Date of Patent: September 13, 1983
    Inventor: Bernhard V. Fejmert
  • Patent number: 4382683
    Abstract: In a rotary drum mixing machine of the kind in which the drum is rotated in opposite directions to mix and eject its contents respectively by a prime-mover operating through driving and driven means on a prime-mover driven shaft and the closed end of the drum respectively, reversal of the direction of rotation of the drum can be effected without reversing the prime-mover by a pivotally mounted pair of gear wheels which are continuously driven in opposite directions by the prime-mover and are alternately movable into operative engagement with the driving means for the drum.
    Type: Grant
    Filed: September 24, 1980
    Date of Patent: May 10, 1983
    Inventor: Thomas J. Teagle
  • Patent number: 4291503
    Abstract: A barrel apparatus for use in treating workpieces with grinding media, comprising a novel rotary barrel provided on its inner peripheral wall with a spiral flight extending lengthwise of the barrel and one or more ancillary flights extending straight or in an extremely modulated spiral form lengthwise of said barrel and intersecting the spirals of said first spiral flight, thereby accelerating the flow of the contents in the barrel to improve grinding efficiency, and further, permitting smooth delivery of the contents even when a small amount of the contents is present in the barrel.
    Type: Grant
    Filed: September 5, 1979
    Date of Patent: September 29, 1981
    Inventor: Yasunaga Higashi
  • Patent number: 4199262
    Abstract: A mobile mixing and delivery apparatus for bulk slurry explosive compositions is provided. The apparatus comprises a vehicle body upon which is mounted a rotatable drum mixer. Explosive ingredients are fed into the mixer, mixed and then delivered close to the point of use where they are pumped through a hose into boreholes. Provision is made for the addition of thickness or other additives to the slurry during pumping.
    Type: Grant
    Filed: March 13, 1979
    Date of Patent: April 22, 1980
    Assignee: Canadian Industries Limited
    Inventors: William E. Cribb, Robert J. Roach
  • Patent number: 4188127
    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.
    Type: Grant
    Filed: November 6, 1978
    Date of Patent: February 12, 1980
    Assignee: London Concrete Machinery Co.
    Inventor: Jess W. Pawley
  • Patent number: 4187028
    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.
    Type: Grant
    Filed: November 6, 1978
    Date of Patent: February 5, 1980
    Assignee: London Concrete Machinery Co.
    Inventor: Jess W. Pawley
  • Patent number: 4154534
    Abstract: A transit concrete mixer includes a drum which is mounted for discharge either forwardly or reversely of the vehicle and has two sets of flights for two-stage concrete loading and discharging. One set of flights is particularly useful for carrying the aggregate from the base of the drum upwardly along the major axis of the drum and a second set of flights is adapted for receiving the aggregate and transporting it through the remaining length of the drum to the discharge opening of the drum. Thus, for relatively stiff, low slump aggregates which are useful in paving and for formless type useage, the concrete mixer unit is fully adaptable for such low slump values. Conversely, the same set of flights is adapted for charging and discharging relatively high slump values which are utilized for form type applications.
    Type: Grant
    Filed: July 28, 1977
    Date of Patent: May 15, 1979
    Assignee: The Jaeger Machine Company
    Inventors: William A. Lawrence, John A. O'Dea
  • Patent number: 4097925
    Abstract: By a combination of a slump indicator calibrated for each of the several particular trucks in a system of concrete mixer transport trucks and a particularly readily locatable dynamically balanced emergency power unit, the contents of the drum or mixer of a disabled concrete mixer truck are mixed and/or tested and/or treated and/or discharged as needed.
    Type: Grant
    Filed: March 15, 1976
    Date of Patent: June 27, 1978
    Inventor: William H. Butler, Jr.
  • Patent number: RE37018
    Abstract: A rigid cover attached to the chute of a cement truck can prevent the accidental discharge of cement residue from the chute of the cement truck while the truck is moving. The use of a rigid cover prevents the bending of the cover under the weight of the cement residue. The rigid cover can be attached to an over-chute portion of the chute such that when the over-chute rests upon the main chute, the rigid cover can be positioned to prevent the accidental discharge of cement from the chute or can be flopped on top of the over-chute. The rigid cover is designed to hold back a substantial amount of cement residue.
    Type: Grant
    Filed: February 25, 1999
    Date of Patent: January 16, 2001
    Inventor: Jeff Cronquist