Hydraulic Drive Or Control Patents (Class 366/61)
  • Patent number: 10201913
    Abstract: A vehicle mountable, self-contained independent transit concrete mixer operating system is provided in two pre-assembled modular parts for mounting on a truck chassis. The system needs only power take-off, electrical and control system connections to be operable.
    Type: Grant
    Filed: June 20, 2014
    Date of Patent: February 12, 2019
    Assignee: Con-Tech Manufacturing Inc.
    Inventors: Garwin B. McNeilus, Grant McNeilus, Brian R. Meldahl, Tracy L. Schrafel
  • Patent number: 9694683
    Abstract: A mixer drum driving apparatus having a mixer drum carried on a frame of a mixer truck to be free to rotate and a drive source configured to drive the mixer drum to rotate includes a rotary motor configured to drive the mixer drum to rotate as the drive source, a power supply configured to supply power to the rotary motor, and a power generator configured to generate power as the mixer drum rotates and charge the generated power to the power supply.
    Type: Grant
    Filed: March 12, 2012
    Date of Patent: July 4, 2017
    Assignee: KYB Corporation
    Inventors: Yoshimitsu Takahashi, Kazunori Tanaka
  • Patent number: 9377007
    Abstract: A system, a device and a method for controlling an operation of a wind turbine (100) based on a wind turbine component workload. The system includes a control device (120) that is configured to actuate a wind turbine component (130). The system also includes a wind turbine controller (205) that is coupled in communication with the control device (120) and configured to determine a workload associated with the wind turbine component (130) based at least in part on one or more actuations of the wind turbine component (130) by the control device (120) within a time period. The wind turbine controller (205) is also configured to calculate an operating threshold value based at least in part on the calculated workload and to operate the wind turbine component (130) by the control device (120) based on the calculated operating threshold value.
    Type: Grant
    Filed: December 30, 2010
    Date of Patent: June 28, 2016
    Assignee: General Electric Company
    Inventor: Wei Zhu
  • Patent number: 8960990
    Abstract: Method and system for motoring and obtaining information about quantity and characteristics of cementitious material In a rotating mixing drum. The present invention involves analysis of a sequence of values corresponding to a waveform reflecting the hydraulic pressure required to turn a concrete mixing drum at successive instances during rotation. Preferred embodiments involve the conversion of this time-domain data into the frequency-domain. Behavior of multiple harmonics can be examined in real time and further information obtained regarding physical properties of the concrete. Rheology or other properties can be adjusted by introducing a liquid into the concrete, based on a comparison between time-domain and/or frequency-domain values derived from a sample concrete in the drum and previously stored time-domain and/or frequency-domain values, which are preferably correlated with physical characteristics of concrete, such as slump, slump flow, load weight, and other factors.
    Type: Grant
    Filed: March 23, 2010
    Date of Patent: February 24, 2015
    Assignee: Verifi LLC
    Inventors: Eric Koehler, Steve Verdino, Robert Culley
  • Patent number: 8939239
    Abstract: This invention is a vehicle for the transportation of construction materials in hard to reach areas, which includes: a chassis composed of transverse and lateral axles; tires to transport the vehicle; a transmission system; a steering and speed control system; a pair of fixed posts on the chassis, arranged vertically and parallel to each other, to form an area where a means to contain the construction material to be transported is placed. Where the building materials are cement, concrete, reinforced concrete, lime and sand mixtures, blocks, and bricks, among others.
    Type: Grant
    Filed: March 4, 2014
    Date of Patent: January 27, 2015
    Inventors: Trevor George Marchand, Clement Robert Marchand
  • Patent number: 8926164
    Abstract: A mixer truck includes: a mixer drum capable of carrying ready-mixed concrete; a driving device that drives the mixer drum to rotate using an oil pressure of a working oil; a pressure sensor that detects a driving condition of the mixer drum driven by the driving device; a controller that determines a magnitude of rotation unevenness in the mixer drum by comparing a magnitude of variation in the driving condition detected by the pressure sensor with a predetermined set value after the ready-mixed concrete in the mixer drum has been discharged; and a notifying device that notifies a driver that the magnitude of the rotation unevenness in the mixer drum has reached an allowable value when the controller determines that the magnitude of the variation in the driving condition detected by the pressure sensor has reached the set value.
    Type: Grant
    Filed: August 28, 2012
    Date of Patent: January 6, 2015
    Assignee: Kayaba Industry Co., Ltd.
    Inventor: Takashi Kamijo
  • Publication number: 20140198599
    Abstract: A mixer truck includes: a mixer drum capable of carrying ready-mixed concrete; a driving device that drives the mixer drum to rotate using an oil pressure of a working oil; a pressure sensor that detects a driving condition of the mixer drum driven by the driving device; a controller that determines a magnitude of rotation unevenness in the mixer drum by comparing a magnitude of variation in the driving condition detected by the pressure sensor with a predetermined set value after the ready-mixed concrete in the mixer drum has been discharged; and a notifying device that notifies a driver that the magnitude of the rotation unevenness in the mixer drum has reached an allowable value when the controller determines that the magnitude of the variation in the driving condition detected by the pressure sensor has reached the set value.
    Type: Application
    Filed: August 28, 2012
    Publication date: July 17, 2014
    Applicant: Kayaba Industry Co., Ltd.
    Inventor: Takashi Kamijo
  • Patent number: 8727604
    Abstract: A system for calculating and reporting slump in a delivery vehicle having a mixing drum 14 and hydraulic drive 16 for rotating the mixing drum, including a rotational sensor 20 configured to sense a rotational speed of the mixing drum, a hydraulic sensor 22 coupled to the hydraulic drive and configured to sense a hydraulic pressure required to turn the mixing drum, and a communications port 26 configured to communicate a slump calculation to a status system 28 commonly used in the concrete industry, wherein the sensing of the rotational speed of the mixing drum is used to qualify a calculation of current slump based on the hydraulic pressure required to turn the mixing drum.
    Type: Grant
    Filed: August 17, 2010
    Date of Patent: May 20, 2014
    Assignee: Verifi LLC
    Inventors: John I. Compton, Roy Cooley, Michael Topputo
  • Publication number: 20140010035
    Abstract: A mixer drum driving apparatus includes a mixer drum carried on a frame of a mixer truck in a frontward tilted condition to be free to rotate, and a drive source configured to drive the mixer drum to rotate. The drive source includes a motor which is disposed in a space between a rear portion of the mixer drum and a rear portion of the frame in order to drive the mixer drum to rotate.
    Type: Application
    Filed: March 15, 2012
    Publication date: January 9, 2014
    Applicant: KAYABA INDUSTRY CO., LTD.
    Inventor: Yoshimitsu Takahashi
  • Publication number: 20140010036
    Abstract: A mixer drum driving device includes a mixer drum, a hydraulic motor, a hydraulic pump, an auxiliary hydraulic pump for rotating the mixer drum for mixing by supplying pressure oil to the hydraulic motor independently of the hydraulic pump, and a direct-current brush motor for driving and rotating the auxiliary hydraulic pump. In the case of rotating the mixer drum for mixing, the mixer drum is driven and rotated by driving only the auxiliary hydraulic pump by the direct-current brush motor.
    Type: Application
    Filed: March 15, 2012
    Publication date: January 9, 2014
    Applicant: KAYABA INDUSTRY CO., LTD.
    Inventors: Yoshimitsu Takahashi, Kazunori Tanaka
  • Patent number: 8616758
    Abstract: A mixer drum driving device includes a hydraulic motor that rotates a mixer drum, a first hydraulic pump that is driven by an engine to be capable of supplying working oil to the hydraulic motor, an electric motor, a power supply connected to the electric motor, a second hydraulic pump capable of supplying the working oil to the hydraulic motor on the basis of a driving force of the motor, and a flow dividing valve that divides the working oil discharged from the first hydraulic pump and supplies the working oil to the hydraulic motor and the second hydraulic pump. The second hydraulic pump is configured to rotate the electric motor using the working oil. The electric motor is configured to generate electric power so as to charge the power supply when driven to rotate by the second hydraulic pump.
    Type: Grant
    Filed: March 12, 2012
    Date of Patent: December 31, 2013
    Assignee: Kayaba Industry Co., Ltd.
    Inventor: Yoshimitsu Takahashi
  • Publication number: 20130021867
    Abstract: A concrete mixer truck includes: a driving device that drives a mixer drum to rotate; a pressure sensor that detects a pressure of the working fluid in the driving device; a material introduction determination unit that determines whether or not a material for generating the mixed concrete has been introduced into the mixer drum; a pressure determination unit that determines whether or not the pressure of the working fluid detected by the pressure sensor has fallen to a set pressure set in advance in accordance with a carrying amount and a fluidity of the mixed concrete after the introduction of the materials for the mixed concrete into the mixer drum; and a notification device that notifies an operator that the pressure of the working fluid in the driving device has fallen to the set pressure on the basis of the determination made by the pressure determination unit.
    Type: Application
    Filed: July 11, 2012
    Publication date: January 24, 2013
    Applicant: KAYABA INDUSTRY CO., LTD.
    Inventor: Hiroyuki SHIMIZU
  • Patent number: 8104947
    Abstract: A concrete agitating drum (1) is driven by a hydraulic motor (81). A connection switch-over valve (20) is arranged to have a function to regulate a flow cross-sectional area of pressurized working oil supplied to the hydraulic motor (81) from a variable capacity hydraulic pump (10). The variable capacity hydraulic pump (10) is driven by a combustion engine (60) together with a charge pump (11). When a discharge pressure of the charge pump (11) is low, the connection switch-over valve (20) maintains a small flow cross-sectional area to rotate the agitating drum (1) at a low rotation speed so that fuel consumption of the combustion engine (60) is suppressed to be small. When the discharge pressure of the charge pump (11) becomes high, the connection switch-over valve (20) enlarges the flow cross-sectional area, thereby realizing a rated rotation speed of the agitating drum (1).
    Type: Grant
    Filed: July 13, 2007
    Date of Patent: January 31, 2012
    Assignee: Kayaba Industry Co., Ltd.
    Inventors: Kunihiro Ando, Masaya Abe, Yoshihito Iwasaki
  • 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: 7896538
    Abstract: A power take-off unit is connected to a power take-off gear/port on a concrete mixing truck transmission, the power take-off unit being driven by the engine so it is always providing power as long as the engine is running. A hydraulic pump is connected to and driven by the power take-off unit. Hydraulic lines connect the pump to a planetary drive assembly for the concrete mixing drum; the drum itself is capable of receiving only a small/light load of concrete, in the range of two to five cubic yards.
    Type: Grant
    Filed: February 15, 2007
    Date of Patent: March 1, 2011
    Inventor: Ian M. Wright
  • Patent number: 7866875
    Abstract: A variable capacity hydraulic pump (10) drives a concrete agitating drum (1) via a hydraulic motor (81). A hydraulic actuator (14) regulates a discharge flow rate of the hydraulic pump (10) depending on an actuator driving pressure. A load sensing valve (40) generates the actuator driving pressure by reducing a discharge pressure of the hydraulic pump (10) according to a differential pressure between the discharge pressure and a load pressure acting on the hydraulic motor (81). A shut-off valve (20) shuts off supply of the pressurized oil discharged from the hydraulic pump (10) to the hydraulic motor (81). Due to this action, when the differential pressure increases beyond a predetermined differential pressure, an unload valve (30) drains the discharged oil, thereby preventing the hydraulic pump (10) from generating noise due to an excessive increase in the discharge pressure.
    Type: Grant
    Filed: June 1, 2007
    Date of Patent: January 11, 2011
    Assignee: Kayaba Industry Co., Ltd.
    Inventors: Masaya Abe, Kunihiro Ando, Yoshihito Iwasaki
  • Patent number: 7832919
    Abstract: A gear for driving a drum of a ready-mix concrete truck comprises a driving motor (5) which drives an inner spider gear (7) of a planetary gear. An outer spider gear (16) forms the driven part and a bearing (11), by which the drum of the concrete truck is mounted, is disposed between a planetary gear (23) and the driving motor (5).
    Type: Grant
    Filed: August 8, 2005
    Date of Patent: November 16, 2010
    Assignee: ZF Friedrichshafen AG
    Inventor: Eduard Heilig
  • Patent number: 7740396
    Abstract: A system and method are provided for improving the operational performance of a moving cement mixer vehicle with a rotatable mixing drum by automatically stopping the rotation of the mixing drum at select moments. The system may include a sensor adapted to deliver a signal indicative of an operational parameter, such as steering angle of the vehicle, and a processing unit adapted to receive the signal from the sensor and deliver a control signal based on the signal for stopping rotation of the mixing drum.
    Type: Grant
    Filed: April 25, 2006
    Date of Patent: June 22, 2010
    Assignee: Bendix Commercial Vehicle Systems LLC
    Inventors: Charles E. Ross, William P. Amato, Michael D. Tober, Timothy J. Frashure
  • Patent number: 7722243
    Abstract: A concrete transit mixer truck includes a control system that automatically controls rotation of the mixer drum at a constant drum speed when the mixer truck is traveling. When sensed speed of the truck exceeds a threshold, the control system automatically causes a hydraulic system to rotate the drum at a constant speed, regardless of the truck engine speed.
    Type: Grant
    Filed: December 19, 2006
    Date of Patent: May 25, 2010
    Assignee: Schwing America, Inc.
    Inventors: Charles P. Schumacher, Alexander Krasny, Heinz Ulrich Worthmann, Robert Benjamin Durand, Carl Phillip Quist
  • Patent number: 7489993
    Abstract: A vehicle fleet management information system identifies location and direction of movement of each vehicle in a fleet in real-time, and automatically reports such information, as well as status of predetermined events in which the vehicle is engaged, directly to the fleet manager. One aspect relates to automated reporting of status of a ready mix slurry material truck having a mixer drum. A sensor detects the begin pour event by detecting the mixer drum being run in a discharge direction.
    Type: Grant
    Filed: May 10, 2005
    Date of Patent: February 10, 2009
    Assignee: Trimble Navigation Limited
    Inventors: John R. Coffee, David A. Dye, Robert W. Lewis, Kevin M. Marvin
  • Patent number: 7467889
    Abstract: An agitating drum driving device comprises a hydraulic motor (81) for rotating an agitating drum (1), and a swash-plate type hydraulic pump (10) connected to a combustion engine (60) to supply pressurized oil to drive the hydraulic motor (81). When the engine rotation speed is not higher than a predetermined speed, the swash-plate angle of a swash-plate (64) is regulated to keep a differential pressure between a pressure of the pressurized oil and a load pressure acting on the hydraulic motor (81) constant. When the engine rotation speed rises above the predetermined speed, the flow rate of the pressurized oil is increased as the engine rotation speed increases while relatively decreasing an increasing rate of the flow rate of the pressurized oil with respect to an increase rate of the engine rotation speed as the engine rotation speed increases.
    Type: Grant
    Filed: June 1, 2007
    Date of Patent: December 23, 2008
    Assignee: Kayaba Industry Co., Ltd.
    Inventors: Masaya Abe, Kunihiro Ando, Yoshihito Iwasaki
  • Publication number: 20080279036
    Abstract: The present invention relates to a control for truck mixers having a hydraulically driven mixer drum, with the hydraulic pump of the mixer drive being driven by the drive motor of the truck mixer or by a separate motor. In accordance with the invention, the speed of the drive motor is adjustable in dependence on the demanded drum speed, with the desired drum speed being able to be set via an operating lever.
    Type: Application
    Filed: April 18, 2008
    Publication date: November 13, 2008
    Inventors: Werner Frey, Berthold Ruf
  • Publication number: 20080198686
    Abstract: A power take-off unit is connected to a power take-off gear/port on a concrete mixing truck transmission, the power take-off unit being driven by the engine so it is always providing power as long as the engine is running. A hydraulic pump is connected to and driven by the power take-off unit. Hydraulic lines connect the pump to a planetary drive assembly for the concrete mixing drum; the drum itself is capable of receiving only a small/light load of concrete, in the range of two to five cubic yards.
    Type: Application
    Filed: February 15, 2007
    Publication date: August 21, 2008
    Inventor: Ian M. Wright
  • Publication number: 20080144424
    Abstract: A concrete transit mixer truck includes a control system that automatically controls rotation of the mixer drum at a constant drum speed when the mixer truck is traveling. When sensed speed of the truck exceeds a threshold, the control system automatically causes a hydraulic system to rotate the drum at a constant speed, regardless of the truck engine speed.
    Type: Application
    Filed: December 19, 2006
    Publication date: June 19, 2008
    Applicant: Schwing America, Inc.
    Inventors: Charles P. Schumacher, Alexander Krasny, Heinz Ulrich Worthmann, Robert Benjamin Durand, Carl Phillip Quist
  • Patent number: 7345589
    Abstract: At least one embodiment of the inventive technology claimed herein seeks to reduce the risk of the excessive admixing of water during a concrete wetting operation by providing a system that alerts, with at least one water flow indicator, at least one individual having the ability to readily terminate the water admixing operation either that water is currently being added and/or perhaps that a certain time of water addition has elapsed. At least one embodiment of the inventive technology includes a proximity switch.
    Type: Grant
    Filed: July 20, 2005
    Date of Patent: March 18, 2008
    Inventor: Dusty Ehrlich
  • Publication number: 20080008025
    Abstract: An agitating drum driving device comprises a hydraulic motor (81) for rotating an agitating drum (1), and a swash-plate type hydraulic pump (10) connected to a combustion engine (60) to supply pressurized oil to drive the hydraulic motor (81). When the engine rotation speed is not higher than a predetermined speed, the swash-plate angle of a swash-plate (64) is regulated to keep a differential pressure between a pressure of the pressurized oil and a load pressure acting on the hydraulic motor (81) constant. When the engine rotation speed rises above the predetermined speed, the flow rate of the pressurized oil is increased as the engine rotation speed increases while relatively decreasing an increasing rate of the flow rate of the pressurized oil with respect to an increase rate of the engine rotation speed as the engine rotation speed increases.
    Type: Application
    Filed: June 1, 2007
    Publication date: January 10, 2008
    Applicant: KAYABA INDUSTRY CO., LTD.
    Inventors: Masaya Abe, Kunihiro Ando, Yoshihito Iwasaki
  • Publication number: 20070263478
    Abstract: The invention provides a hydraulic power supply for fitting to a transit mixer truck including an engine and a hydraulic pump. The hydraulic pump is operably connected to the auxiliary engine to produce pressure in hydraulic conduits attached thereto. The conduits are configured to enable attachment of the hydraulic pump to a hydraulic motor of a mixing drum of the transit mixer truck. The invention also provides a method of retrofitting an independent hydraulic power supply to a transit mixer truck having hydraulically powered mixer drum, including the steps of disconnecting a first hydraulic pump from a hydraulic motor of the mixer drum, providing an auxiliary engine, providing a second hydraulic pump operably connected to the auxiliary engine to produce pressure in a hydraulic conduits attached thereto, and connecting the second hydraulic pump via said conduits to the hydraulic motor of the mixer drum.
    Type: Application
    Filed: May 15, 2007
    Publication date: November 15, 2007
    Inventor: Leon A. Burch
  • Patent number: 7048430
    Abstract: A hydraulic concrete mixer includes a drum (110) having a mixing blade (120) attached to an interior thereof, a frame (130) supporting the drum, an engine (140) mounted on the frame, and a drive train (150) extending through at least a portion of the drum. The drive train includes: a hydraulic motor (210); a first rigid plate (220) between the hydraulic motor and the drum; a second rigid plate (230) inside the drum and coupled to the first rigid plate such that a portion of the drum is held between and in fixed relationship to the first rigid plate and the second rigid plate; a first shaft (240) inside the drum and adjacent to the second rigid plate; a second shaft (250) adjacent to the first shaft; and a mounting plate (260) coupled to the second shaft.
    Type: Grant
    Filed: March 22, 2004
    Date of Patent: May 23, 2006
    Inventors: David L. Birmingham, Sr., David L. Birmingham, Jr.
  • Patent number: 6942375
    Abstract: A vehicle with one or more accessory systems that are capable of drawing power from a flow of pressurized hydraulic fluid and utilizing that power toward their intended functionality. The vehicle has a powertrain including a primary internal combustion engine and driveline components that are operable to couple the driveline end of a crankshaft of the primary internal combustion engine to one or more driven ground-engaging components of the vehicle to move the vehicle along the ground. The vehicle includes a hydraulic pump that is coupled to the non-driveline end of the crankshaft and that provides a flow of pressurized hydraulic fluid for powering the accessory systems of the vehicle.
    Type: Grant
    Filed: October 29, 2002
    Date of Patent: September 13, 2005
    Assignee: International Truck Intellectual Property Company, LLC
    Inventors: Larry N. Chanasyk, William C. McNeilly
  • Patent number: 6923566
    Abstract: The current invention is to an arrangement for a portable emergency drum jumper that can be mounted to the mixer fender or mixer fender of a truck to provide emergency power to rotate the drum. The pump has been substantially reduced in size by rotating the drum at a reduced speed sufficient to mix in a retarder or water that will prevent the concrete for setting up to 24 hours to provide time to unload the concrete from the drum. Instead of attempting to duplicate the power and drum rotation rate of 12-14 rpm of a fully operational truck, the emergency drum jumper operates at a slower rate such as 2 rpm which is sufficient to mix the retarder or water fully into the concrete and to allow unloading of the concrete. While the higher speed of the fully operational truck allows for expedited on-site mixing of the concrete for a particular job, the lower speed of the emergency hydraulic pump of the current invention provides a fully capable system in a portable system which can be easily delivered on site.
    Type: Grant
    Filed: September 20, 2002
    Date of Patent: August 2, 2005
    Inventor: Richard S. Willbee, Jr.
  • Publication number: 20040081014
    Abstract: A vehicle with one or more accessory systems that are capable of drawing power from a flow of pressurized hydraulic fluid and utilizing that power toward their intended functionality. The vehicle has a powertrain including a primary internal combustion engine and driveline components that are operable to couple the driveline end of a crankshaft of the primary internal combustion engine to one or more driven ground-engaging components of the vehicle to move the vehicle along the ground. The vehicle includes a hydraulic pump that is coupled to the non-driveline end of the crankshaft and that provides a flow of pressurized hydraulic fluid for powering the accessory systems of the vehicle.
    Type: Application
    Filed: October 29, 2002
    Publication date: April 29, 2004
    Inventors: Larry N. Chanasyk, William C. McNeilly
  • Publication number: 20030223304
    Abstract: The current invention is to an arrangement for a portable emergency drum jumper that can be mounted to the mixer fender or mixer fender of a truck to provide emergency power to rotate the drum. The pump has been substantially reduced in size by rotating the drum at a reduced speed sufficient to mix in a retarder or water that will prevent the concrete for setting up to 24 hours to provide time to unload the concrete from the drum. Instead of attempting to duplicate the power and drum rotation rate of 12-14 rpm of a fully operational truck, the emergency drum jumper operates at a slower rate such as 2 rpm which is sufficient to mix the retarder or water fully into the concrete and to allow unloading of the concrete. While the higher speed of the fully operational truck allows for expedited on-site mixing of the concrete for a particular job, the lower speed of the emergency hydraulic pump of the current invention provides a fully capable system in a portable system which can be easily delivered on site.
    Type: Application
    Filed: September 20, 2002
    Publication date: December 4, 2003
    Inventor: Richard S. Willbee
  • Patent number: 6641297
    Abstract: An apparatus for holding hazardous waste made up of solids and liquids in a flowable form includes a tank made of material selected to be impervious to and non-corrodible by the hazardous waste and having a non-critical portion, an agitator in the tank having fluid agitation portions oriented for rotational movement about a horizontal axis, a non-sparking motor located within the tank connected to the agitator for imparting rotation to the fluid agitation portions, and a power source for the motor outside the tank having means passing through the non-critical portion of the tank for communicating power from the power source to the motor. Thus, the power source may communicate power to the non-spark generating motor to impart rotation to the agitator to cause the fluid agitation portions to agitate hazardous waste made up of solids and liquids held in the tank to maintain the hazardous waste in flowable form.
    Type: Grant
    Filed: November 5, 2001
    Date of Patent: November 4, 2003
    Inventor: Robert M. Rumph
  • Patent number: 6074083
    Abstract: A hydrostatic-mechanical drive unit for a mixing drum, especially of a mobile concrete mixer has pistons (24) of a hydraulic motor (25) that are spring-loaded so as to constantly bear, via rollers (25), on a cam surface (26). With a hydraulic pump (2) stationary, the operating mode of the hydraulic motor (6) can be reversed. In order to reliably prevent further oscillation of the mixing drum, suction valves (32, 33) are connected to lines (4, 5) leading to the hydraulic motor (6) so that when the mode principle of the hydraulic motor (6) is reversed, oil can be inducted from an oil reservoir.
    Type: Grant
    Filed: August 13, 1998
    Date of Patent: June 13, 2000
    Assignee: ZF Friedrichshafen AG
    Inventors: Wolfgang Gebhard, Egon Mann
  • Patent number: 5868494
    Abstract: A mixing apparatus, comprising, a frame, a pair of handles secured to the frame with each handle having a proximal and a distal end thereto and a pair of downwardly depending support elements. A first wheel is secured to the distal ends of the pair of handles by frame elements and a rear set of wheels are secured to the proximal ends of the pair of handles by frame elements. A mounting element is secured to the frame for supporting a drive engine. A drive chain mechanism is linked to a toothed wheel and to the drive engine, the toothed wheel having an internal brake drum and internal brake shoes. The internal brake drum and internal brake shoes are connected to a brake cable having a tension reduction cam for tension reduction. A centrifugal clutch for engagement with the drive mechanism is linked to a throttle operably engaged to the to the drive engine.
    Type: Grant
    Filed: July 20, 1998
    Date of Patent: February 9, 1999
    Assignee: Power Technology Unlimited, In.
    Inventors: Jeffery D. Campbell, Rick Dean Fox
  • Patent number: 5746509
    Abstract: The invention concerns a hydrostatic-mechanical gear for driving a mixed drum and, in particular, the drum of a concrete mixer vehicle. Cooling is provided for by the continuous removal of oil from a high pressure circuit, via a connecting pipe, and the constant feeding of the cooled oil, which has passed through an oil cooler, to the interior of a gear housing via a pipe. This pipe discharges into the interior of the gear housing immediately proximate a hydraulic motor. The oil then flows through the hydraulic motor, which is preferably a slow-speed radial piston motor, to reduce the noise generation of the hydraulic motor.
    Type: Grant
    Filed: October 18, 1995
    Date of Patent: May 5, 1998
    Assignee: ZF Friedrichshafen AG
    Inventors: Wolfgang Gebhard, Egon Mann
  • 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: 5489150
    Abstract: A motar mixer driven by a hydraulic pump and motor which are powered by an gasoline engine. The mixer frame is configured as a trailer to facilitate transport of the mortar mixer. The trailer frame is further adapted so that the frame members form a fluid reservoir for the hydraulic fluid for the system. A tubular steel frame assembly, is manufactured so that the inner chambers of the frame members are in fluid communication with one another. A reservoir dam is placed inside the horizontal trailer frame member to provide a crush zone for eliminating risk of damage to the reservoir in the event that the weld that secures the front trailer frame member to the horizontal trailer frame member fails or fractures.
    Type: Grant
    Filed: January 10, 1995
    Date of Patent: February 6, 1996
    Assignee: Whiteman Industries, Inc.
    Inventor: Marvin E. Whiteman, Jr.
  • Patent number: 5411329
    Abstract: A large volume cement mixer that is readily mobile and can be set up for use with a concrete batch plant at a given location. The cement mixer is carried on an elongated frame having wheels on one end and a gooseneck connection on the front end for towing purposes. A longitudinally movable carriage is carried on top of the elongated frame and the carriage is adapted to carry a large cement mixer mounted thereon. In operation, the elongate frame is braced in approximately 45.degree. angle attitude as the carriage supports the cement mixer in generally horizontal, rotatable fixture. Hydraulic devices are provided for rotating the cement mixer during the mixing mode of operation and, after completion, the carriage structure is hydraulically controlled to move upward along the elongate frame to a dump position whereupon the cement mixer is rotated forward and the mixed concrete is allowed to fall to a discharge position.
    Type: Grant
    Filed: June 28, 1993
    Date of Patent: May 2, 1995
    Inventor: L. F. Perry
  • Patent number: 5385402
    Abstract: An apparatus for holding hazardous waste made up of solids and liquids in a flowable form includes a tank made of material selected to be impervious to and non-corrodible by the hazardous waste and having a non-critical portion, an agitator in the tank having fluid agitation portions oriented for rotational movement about a horizontal axis, a non-sparking motor located within the tank connected to the agitator for imparting rotation to the fluid agitation portions, and a power source for the motor outside the tank having means passing through the non-critical portion of the tank for communicating power from the power source to the motor. Thus, the power source may communicate power to the non-spark generating motor to impart rotation to the agitator to cause the fluid agitation portions to agitate hazardous waste made up solids and liquids held in the tank to maintain the hazardous waste in flowable form.
    Type: Grant
    Filed: August 23, 1994
    Date of Patent: January 31, 1995
    Assignee: Sumter Transport, Inc.
    Inventor: Robert M. Rumph
  • Patent number: 5340213
    Abstract: An apparatus for holding hazardous waste made up of solids and liquids in a flowable form includes a tank made of material selected to be impervious to and non-corrodible by the hazardous waste and having a non-critical portion, an agitator in the tank having fluid agitation portions oriented for rotational movement about a horizontal axis, a non-sparking motor located within the tank connected to the agitator for imparting rotation to the fluid agitation portions, and a power source for the motor outside the tank having means passing through the non-critical portion of the tank for communicating power from the power source to the motor. Thus, the power source may communicate power to the non-spark generating motor to impart rotation to the agitator to cause the fluid agitation portions to agitate hazardous waste made up of solids and liquids held in the tank to maintain the hazardous waste in flowable form.
    Type: Grant
    Filed: December 30, 1993
    Date of Patent: August 23, 1994
    Assignee: Sumter Transport, Inc.
    Inventor: Robert M. Rumph
  • Patent number: 5275487
    Abstract: An apparatus for holding hazardous waste made up of solids and liquids in a flowable form includes a tank made of material selected to be impervious to and non-corrodible by the hazardous waste and having a non-critical portion, an agitator in the tank having fluid agitation portions oriented for rotational movement about a horizontal axis, a non-sparking motor located within the tank connected to the agitator for imparting rotation to the fluid agitation portions, and a power source for the motor outside the tank having means passing through the non-critical portion of the tank for communicating power from the power source to the motor. Thus, the power source may communicate power to the non-spark generating motor to impart rotation to the agitator to cause the fluid agitation portions to agitate hazardous waste made up of solids and liquids held in the tank to maintain the hazardous waste in flowable form.
    Type: Grant
    Filed: September 4, 1992
    Date of Patent: January 4, 1994
    Assignee: The Maitland Company, Inc.
    Inventor: Robert M. Rumph
  • Patent number: 5261739
    Abstract: Multifunction building machine used in civil construction sites and public works. The machine combines on a self-propelled frame, a concrete-mixer (20) with a set of tools on one side, comprising a loading power shovel (60), a grader (70) and a digging shovel (80) and on the other side a dumper (50). The concrete mixer is of the fixed container type provided with a rotary mixer (33), a hinged cover (25) being adapted to form a spout for transfering the contents from the loading shovel to the dumper.
    Type: Grant
    Filed: November 13, 1992
    Date of Patent: November 16, 1993
    Inventors: Antonio da Costa Goncalves, Manuel J. da Costa Ferreira Dias
  • Patent number: 5076703
    Abstract: An improved oil tank for storing hydraulic fluid and the hydraulically-powered system is fabricated from a polymeric material which is resistant to chemical breakdown from oil. The tank is constructed in a manner which facilitates internal circulation of hydraulic oil during use. The novel configuration of the tank lends itself to inexpensive fabrication through a rotational molding process. The tank is lightweight, inexpensive to manufacture, and is particularly advantageous for use in vehicle-mounted hydraulic drive systems.
    Type: Grant
    Filed: January 26, 1990
    Date of Patent: December 31, 1991
    Assignee: McNeilus Truck and Manufacturing, Inc.
    Inventors: William L. Loefke, Ronald E. Christenson, Brandon J. McNeilus
  • 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: 4755059
    Abstract: An auger swivel for a concrete mixer includes a channel mounted to a bowl. A center member is pivotally connected to a pivot point near the channel and near an outer surface of the bowl. The center member includes a pair of first wings that extend from the pivot point, opposite each other and away form the bowl. Two slides are received in the channel and are positioned away from each other by a ring. Two second wings are provided. One of the second wings is pivotally connected to one of the first wings at one of its ends and pivotally connected to one of the slides at its other end. The other second wing is similarly connected to the other first wing and the other slide. An actuator rotates the center member about the pivot point and causes the slides to rotate around the outer surface of the bowl and about a longitudinal axis passing through the bowl.
    Type: Grant
    Filed: August 31, 1987
    Date of Patent: July 5, 1988
    Inventor: Luther V. Elkin
  • Patent number: 4585355
    Abstract: The invention relates to a concrete mixer truck having a rotatably driven mixer drum, particularly a drum provided with interior mixing elements, and a hydraulic system as a drive source for the mixing process.It is intended to enhance the effect of the mixing process by transmitting vibration energy to the mixture materials. To this effect, a vibration generator is included in the hydraulic system in such a manner that pressure pulses generated in the flow of the hydraulic fluid are superimposed on the mixing movement in the form of vibrations. This superposition effect may be achieved with respect to the rotation of the drum and/or with respect to the movements of a separate mixing tool.
    Type: Grant
    Filed: December 21, 1984
    Date of Patent: April 29, 1986
    Assignee: Gerhard Hudelmaier
    Inventor: Franz Waitzinger
  • Patent number: 4542990
    Abstract: A hydraulic apparatus drives a semi-trailer hitched to a road tractor and a hydraulic equipment device carried by the semi-trailer. The apparatus includes an auxiliary motor capable of driving the device, for example a concrete mixer, through a hydraulic circuit when the vehicle is traveling along the ground, and an electric circuit for controlling valves which, when the vehicle is stationary, put in communication the circuit and a hydrostatic circuit which drives the concrete mixer. The hydrostatic circuit motorizing the semi-trailer is used for alternately driving either the axles of the semi-trailer or the equipment device to be driven.
    Type: Grant
    Filed: July 21, 1983
    Date of Patent: September 24, 1985
    Inventor: Jean-Claude Fouquet
  • Patent number: 4487507
    Abstract: A processing apparatus for sludge and liquid waste comprising a wheeled vehicle having a frame, a drum type mixer mounted for rotation on said frame, motive power means including a hydraulic pump, a hydraulic motor for rotating said drum type mixer mounted on said frame operable in response to output from said hydraulic pump, waste feed means mounted on said frame, a hydraulic motor for said waste feed means on said frame operable in response to the output of said pump for feeding waste into the input end of said mixer, storage means on said frame for storing a supply of processing agent for said waste, processing agent feed supply means on said frame a hydraulic motor for said processing agent feed means on said frame operable in response to output of said pump for feeding processing agents from said storage means to said mixer, delivery means mounted on said frame for delivering output from said drum type mixer for conveyance to a remote location, valve control means for supplying output of said pump to sai
    Type: Grant
    Filed: October 26, 1983
    Date of Patent: December 11, 1984
    Assignee: London Machinery Company Limited
    Inventor: George Van Wyngaarden
  • Patent number: 4441821
    Abstract: A mixing and delivery system for concrete or the like wherein the delivery range of a mixing auger trough is extended by two (2) delivery chutes which can be selectively deployed. The chutes are stored secured to and beneath the trough in end-to-end relation and are deployed by sliding the chutes lengthwise to extend beyond the trough. The chutes are pivotably engaged so that, in the deployed position, the distal trough may be pivoted out of deployment if it is not needed.
    Type: Grant
    Filed: July 20, 1982
    Date of Patent: April 10, 1984
    Assignee: Barber-Greene Co.
    Inventors: George M. Burkhart, Martin F. Dohnalik