US2968915A - Hydraulic mechanism for concrete mixer - Google Patents

Hydraulic mechanism for concrete mixer Download PDF

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Publication number
US2968915A
US2968915A US699043A US69904357A US2968915A US 2968915 A US2968915 A US 2968915A US 699043 A US699043 A US 699043A US 69904357 A US69904357 A US 69904357A US 2968915 A US2968915 A US 2968915A
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Prior art keywords
pump
drum
hydraulic
concrete mixer
valve
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US699043A
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Jr Robert B Feistel
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Halliburton Oil Well Cementing Co
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Halliburton Oil Well Cementing Co
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Priority to US699043A priority Critical patent/US2968915A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
    • B28C5/42—Apparatus specially adapted for being mounted on vehicles with provision for mixing during transport
    • B28C5/4203—Details; Accessories
    • B28C5/4206—Control apparatus; Drive systems, e.g. coupled to the vehicle drive-system
    • B28C5/421—Drives
    • B28C5/4213—Hydraulic drives
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/38—Control of exclusively fluid gearing
    • F16H61/40—Control of exclusively fluid gearing hydrostatic
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/38—Control of exclusively fluid gearing
    • F16H61/40—Control of exclusively fluid gearing hydrostatic
    • F16H61/4061—Control related to directional control valves, e.g. change-over valves, for crossing the feeding conduits
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S366/00—Agitating
    • Y10S366/606—Tractor-mounted mortar mixing chamber

Definitions

  • This invention relates to a hydraulic operating mechanism for a concrete mixer mounted on a truck and more particularly to a hydraulic system which permits the drum of a concrete mixer to be selectively operated at two different speeds by the engine of the truck.
  • the drum may be rotated at a higher speed such as 12 to 16 r.p.m.
  • Hydraulic systems proposed heretofore have been generally unsatisfactory due to the problems in connection with the dissipation of heat. It has been suggested that heat exchangers or variable volume piston type hydraulic pumps be utilized to overcome these problems but for practical economy reasons such solutions have not been feasible.
  • the present invention provides a hydraulic system in which heat problems are overcome through the use of a two pump system, both pumps being operated when the drum is to be rotated at a high speed and one pump only being operated when the drum is rotated at its lower mixing speed.
  • the hydraulic system disclosed herein provides means for removing the load from the power takeoff when the truck clutch is disengaged to facilitate changing gears.
  • the transmission of the truck is provided with a pair of power takeoffs which drive hydraulic pumps through suitable reduction gearing.
  • One or both of these pumps drive a fluid motor geared to the mixing drum of the concrete mixer.
  • One pump delivers approximately 50 g.p.m. while the other pump operates at approximately 20 g.p.m.
  • both pumps are operated so as to deliver about 70 gpm. to the uid motor.
  • Hydraulic valve means is provided so that the direction of rotation of the drum may be controlled or for stopping motion of the drum altogether when the drum is empty.
  • a primary object of the present invention is to provide a hydraulic system for a concrete mixer in which the mixer drum can be selectively operated at charging and mixing speeds.
  • T he single figure shows diagrammatically the hydraulic system utilized to operate the concrete mixer equipment.
  • a power takeoff means 6 which may be of a well-known construction. It is designed to drive shaft 8 (shown in dotted lines) at the same speed as the engine speed of the vehicle. Shaft 8 serves to drive one hydraulic pump 16 in a manner to be more fully described hereinafter. There is also provided a conventional power takeoff as shown at 10 connected by shaft 9 (shown in dotted lines) to a hydraulic gear pump 12 which delivers a large 2,968,915 Patented J an. 24,. 19.?61
  • Vvolume of oil such as, for example, 50 g.p.m.
  • the power takeoi 10 has a clutch 11.
  • variable speed drive 14 between the power takeoff 6 and the pump 16.
  • the pump 16 may be controlled so as to produce a constant output of approximately g.p.m.
  • the uid is normally stored in a reservoir 36 and passes out from this reservoir along line 17 to supply pumps 12 and 16.
  • the pumps 12 and 16 are connected in parallel, and the output passes through check valves 18 and 19 respectively and along line 24 to valve 25.
  • the valve is rather complex. It has three positions and may be used to cause a fluid motor 33 to rotate a mixing drum ⁇ 37 in either direction or cause it to remain stationary.
  • the uid valve 25 may be controlled from a remote position but the details of the remote control means are i vnot shown or described herein since they may be conzventional.
  • the valve 25 is illustrated as consisting of a cylinder with a piston 26 therein which may be moved to 'any one of three positions'by a rod 27.
  • the cylinder has four ports 38, 39, 4l) and 411.
  • the piston has a number of passageways therein.
  • vThose designated 42 and 43 pass straight through and thus directly connect port 38 to port 40 and port 39 to ⁇ port 41.v ⁇ Those designated 44 and 45 are crossed and serve to reverse the flow, since they connect port 38 to port 39 and port 40 to port 41.
  • the passageway 46 is a by-pass port in that it connects port 38 to port 41.
  • the pump output line 24 is connected with line 32 and conduit 31 is connected with line 34 and the reservoir.
  • the pump output line 24 is connected with conduit 31 and conduit 32 is connected to the reservoir, Fuid passing through lines 31 and 32 drives a uid motor 33 which through connecting means 35 drives the concrete mixer drum 37. It can be seen that by reversing the position of valve 25 the direction of drum rotation can be reversed.
  • a pressure relief valve 28 which by way of lines 29 and 30 is connected with conduits 31 and 32 respectively.
  • This pressure relief Valve is designed to operate in either direction so that in the event that valve 25 is closed to block conduits 31 and 32 and should the inertia of the system cause further fluid flow within lines 31 and 32 the pressure relief valve 28 will prevent the building up of excess pressure within either line.
  • valve 20 connected in line 53 between the output line of pump 16 and the duid reservoir 36.
  • the valve 2.0 may be opened to permit fluid flow directly from the pump 16 to the reservoir 36. It can be seen that this action serves to remove the load from the power takeoff means 6 when desired.
  • check valves 18 and 19 prevent reverse flow of the duid from the uid motor 33.
  • the hydraulic system according to the present invention operates in the following manner.
  • power takeoifs 6 and 10 are both engaged so that there is approximately 70 gpm. supplied through line 24.
  • the valve 25 is moved to the end position shown to cause the drum to be rotated by uid motor 33 in a forward direction.
  • the power takeoff 10 is disengaged by clutch 11 so that the drum is rotated at a lower speed by pump 16.
  • the input to pump 16 will vary over a wide range depending upon the speed of the vehicle, the output of the pump may remain fairly constant by means of variable speed drive 14.
  • ⁇ iirst hydraulic pump a tirst variable speed drive mechanism connecting said first pump to said engine to maintain the delivery rate of said tirst pump reasonably constant in spite of uctuations in thespeed of said engine; la second hydraulic pump; a second drive mechanism connecting said second pump to .said engine, said second drive mechanism including a clutch for disengagingthe drive of said second pump; a reversible hydraulic motor; conduit means connecting the outputs of both ofsaid pumps -to said motor; a reversing valve in said conduit means yfor directing uid from said pumps to drive said motor in either direction; a bypass valve for bypassing fluid from said first pump around said motor; and drive means adapted to connect said motor to said mixing drum to rotate the same in a direction dependent on the direction in which said motor is driven, whereby said drive means may: (l) remain stationary while said engine is running with said clutch disengaged and said bypass valve open; (2) be driven in either direction at relatively high speed while said engine is running with said clutch engaged and said bypass valve closed;

Description

Jan. 24, 1961 R. B. FEISTEL, JR
HYDRAULIC MECHANISM EOE CONCRETE MIXER Filed Nov. 26, 1957 INVENTOR.
ROBERT B. FE/STELMR BY nited States Paten-tf() ice HYDRAULIC MECHANISM FOR CONCRETE MIXER Robert R. Feistel, Jr., Oklahoma City, Okla., assignor,
by mesne assignments, to Halliburton Oil Well Cementlng Company, Duncan, Okla., a corporation of Dela- Ware Filed Nov. 26, 1957, Ser. No. 699,043 i claim. (ci. s0- 19) This invention relates to a hydraulic operating mechanism for a concrete mixer mounted on a truck and more particularly to a hydraulic system which permits the drum of a concrete mixer to be selectively operated at two different speeds by the engine of the truck.
It is well known that concrete mixers on trucks generally operate within two different speed ranges. The drum may be rotated at a higher speed such as 12 to 16 r.p.m.
while charging the drum with raw materials whereas the t mixing and agitating of the materials is done at a lower drum speed within the range of 4 to 6 r.p.m. Hydraulic systems proposed heretofore have been generally unsatisfactory due to the problems in connection with the dissipation of heat. It has been suggested that heat exchangers or variable volume piston type hydraulic pumps be utilized to overcome these problems but for practical economy reasons such solutions have not been feasible.
The present invention provides a hydraulic system in which heat problems are overcome through the use of a two pump system, both pumps being operated when the drum is to be rotated at a high speed and one pump only being operated when the drum is rotated at its lower mixing speed. The hydraulic system disclosed herein provides means for removing the load from the power takeoff when the truck clutch is disengaged to facilitate changing gears.
According to the present invention the transmission of the truck is provided with a pair of power takeoffs which drive hydraulic pumps through suitable reduction gearing. One or both of these pumps drive a fluid motor geared to the mixing drum of the concrete mixer. One pump delivers approximately 50 g.p.m. while the other pump operates at approximately 20 g.p.m. During the charging cycle both pumps are operated so as to deliver about 70 gpm. to the uid motor. After the charging operation is completed the larger pump is shut ofi so that the smaller pump delivers sufficient fluid to rotate the drum at the desired mixing speed. Hydraulic valve means is provided so that the direction of rotation of the drum may be controlled or for stopping motion of the drum altogether when the drum is empty.
A primary object of the present invention is to provide a hydraulic system for a concrete mixer in which the mixer drum can be selectively operated at charging and mixing speeds.
Other objects and many of the attendant advantages of the present invention will become apparent upon con sideration of the drawing wherein:
T he single figure shows diagrammatically the hydraulic system utilized to operate the concrete mixer equipment.
Referring to the drawing, it will be seen that there is provided a power takeoff means 6 which may be of a well-known construction. It is designed to drive shaft 8 (shown in dotted lines) at the same speed as the engine speed of the vehicle. Shaft 8 serves to drive one hydraulic pump 16 in a manner to be more fully described hereinafter. There is also provided a conventional power takeoff as shown at 10 connected by shaft 9 (shown in dotted lines) to a hydraulic gear pump 12 which delivers a large 2,968,915 Patented J an. 24,. 19.?61
Vvolume of oil such as, for example, 50 g.p.m. The power takeoi 10 has a clutch 11.
There is a variable speed drive 14 between the power takeoff 6 and the pump 16. Thus, the pump 16 may be controlled so as to produce a constant output of approximately g.p.m.
The uid is normally stored in a reservoir 36 and passes out from this reservoir along line 17 to supply pumps 12 and 16. The pumps 12 and 16 are connected in parallel, and the output passes through check valves 18 and 19 respectively and along line 24 to valve 25. The valve is rather complex. It has three positions and may be used to cause a fluid motor 33 to rotate a mixing drum `37 in either direction or cause it to remain stationary.
The uid valve 25 may be controlled from a remote position but the details of the remote control means are i vnot shown or described herein since they may be conzventional.
The valve 25 is illustrated as consisting of a cylinder with a piston 26 therein which may be moved to 'any one of three positions'by a rod 27.
The cylinder has four ports 38, 39, 4l) and 411.
-. The piston has a number of passageways therein.
vThose designated 42 and 43 pass straight through and thus directly connect port 38 to port 40 and port 39 to `port 41.v `Those designated 44 and 45 are crossed and serve to reverse the flow, since they connect port 38 to port 39 and port 40 to port 41. The passageway 46 is a by-pass port in that it connects port 38 to port 41.
Thus with the piston 26 in the position shown in the drawing, the pump output line 24 is connected with line 32 and conduit 31 is connected with line 34 and the reservoir. In the other end position of piston 26 the pump output line 24 is connected with conduit 31 and conduit 32 is connected to the reservoir, Fuid passing through lines 31 and 32 drives a uid motor 33 which through connecting means 35 drives the concrete mixer drum 37. It can be seen that by reversing the position of valve 25 the direction of drum rotation can be reversed.
There is provided a pressure relief valve 28 which by way of lines 29 and 30 is connected with conduits 31 and 32 respectively. This pressure relief Valve is designed to operate in either direction so that in the event that valve 25 is closed to block conduits 31 and 32 and should the inertia of the system cause further fluid flow within lines 31 and 32 the pressure relief valve 28 will prevent the building up of excess pressure within either line.
There is also provided a valve 20 connected in line 53 between the output line of pump 16 and the duid reservoir 36. The valve 2.0 may be opened to permit fluid flow directly from the pump 16 to the reservoir 36. It can be seen that this action serves to remove the load from the power takeoff means 6 when desired. During the period of time in which the output of the pump 16 is connected with the uid reservoir, check valves 18 and 19 prevent reverse flow of the duid from the uid motor 33.
The hydraulic system according to the present invention operates in the following manner. When the drum is to be charged, power takeoifs 6 and 10 are both engaged so that there is approximately 70 gpm. supplied through line 24. The valve 25 is moved to the end position shown to cause the drum to be rotated by uid motor 33 in a forward direction. After the charging cycle is completed the power takeoff 10 is disengaged by clutch 11 so that the drum is rotated at a lower speed by pump 16. As pointed out hereinbefore, although the input to pump 16 will vary over a wide range depending upon the speed of the vehicle, the output of the pump may remain fairly constant by means of variable speed drive 14.
When the truck reaches the jobsite, the position of -fvalve I25 isreversed'to reverse -the 4direction of `rotation of the drum and permit discharge of the contents.
By providing two hydraulic pumps to operate the drum at' the-two selected Ispe'ed ranges an economical practical -takeoif and pump may be altered to `suit varying operational requirements without departing :from the principles of the invention. What is claimed as new and desired yto be secured by Letters Patent is: Y
AIn a truck equipped with a variable speed propulsion engine and with a concrete mixing drum mounted for rotation thereon, the improvementYY which comprises: a
`iirst hydraulic pump; a tirst variable speed drive mechanism connecting said first pump to said engine to maintain the delivery rate of said tirst pump reasonably constant in spite of uctuations in thespeed of said engine; la second hydraulic pump; a second drive mechanism connecting said second pump to .said engine, said second drive mechanism including a clutch for disengagingthe drive of said second pump; a reversible hydraulic motor; conduit means connecting the outputs of both ofsaid pumps -to said motor; a reversing valve in said conduit means yfor directing uid from said pumps to drive said motor in either direction; a bypass valve for bypassing fluid from said first pump around said motor; and drive means adapted to connect said motor to said mixing drum to rotate the same in a direction dependent on the direction in which said motor is driven, whereby said drive means may: (l) remain stationary while said engine is running with said clutch disengaged and said bypass valve open; (2) be driven in either direction at relatively high speed while said engine is running with said clutch engaged and said bypass valve closed; and (3) be driven in either direction at relatively low and reasonably constant speed While said engine is running at varying speeds with said clutch disengaged and said bypass valve closed.
References Cited in the le of this patent UNITED STATES PATENTS 1,922,700 Knowles Aug. 15, 1933 1,926,692 Tarbox Sept. 12, 1933 1,991,094 Higley Feb. 12, 1935 2,027,218 Armington Jan. 7, 1936 2,275,321 Scates Mar. 3, 1942 l 2,276,895 Vasseler et al. Mar. 17, 1942 `42,618,932 Taup Nov. 25, 1952 2,676,033 Oury Apr. 20, 1954 a l2,729,435 Harbers et al. Jan. 3, 1956 2,917,897 Shater Dec. 22, 1959 FOREIGN PATENTS 764,798 Great Britain Ian. 2, 1957
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Cited By (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3160398A (en) * 1963-01-24 1964-12-08 Stothert & Pitt Ltd Concrete mixing apparatus
US3258022A (en) * 1962-07-11 1966-06-28 Washington Iron Works Hydraulically powered drive system with pneumatic control circuit
US3279484A (en) * 1963-04-03 1966-10-18 Ross Operating Valve Co Pressure control system
US3330289A (en) * 1964-06-08 1967-07-11 Robert W Grace Constant delivery preselected fluid flow valve control device
US3342031A (en) * 1965-06-23 1967-09-19 Gen Motors Corp Gas turbine fuel control
US3441255A (en) * 1967-10-03 1969-04-29 Case Co J I Concrete mixer apparatus
US3460812A (en) * 1968-03-25 1969-08-12 Robert R Kaufman Concrete mixing control apparatus for concrete mixing trucks
US3658303A (en) * 1969-10-17 1972-04-25 Funk Mfg Co Drive mechanism for concrete mixer
US3796518A (en) * 1971-09-07 1974-03-12 Allied Chem Lpg high pressure mobile pumping unit
US4047604A (en) * 1976-03-25 1977-09-13 Front Discharge Mixer, Inc. Apparatus for controlling the flow of concrete from a mixer
US4153393A (en) * 1977-04-15 1979-05-08 Lear Siegler, Inc. Dual pump operation of coin-operated washing system
FR2462930A1 (en) * 1979-08-07 1981-02-20 Zahnradfabrik Friedrichshafen DRIVE DEVICE FOR MIXER DRUMS
US4329064A (en) * 1979-02-03 1982-05-11 Zahnradfabrik Friedrichshafen Ag Hydrostatic-mechanical drive for vehicular cement mixers
US4542990A (en) * 1982-07-28 1985-09-24 Fouquet Jean Claude Hydraulic apparatus for driving one or more hydraulic equipment devices, mounted on a semi-trailer, by means of the system motorizing the semi-trailer
US4547128A (en) * 1984-05-07 1985-10-15 Hayes John W Proportional mixing means
US4585355A (en) * 1983-12-28 1986-04-29 Gerhard Hudelmaier Concrete mixer truck
US4850702A (en) * 1980-04-28 1989-07-25 Geo Condor, Inc. Method of blending materials
US4915505A (en) * 1980-04-28 1990-04-10 Geo Condor, Inc. Blender apparatus
US4930994A (en) * 1986-03-06 1990-06-05 Alfred Teves Gmbh Radial piston pump
US5032065A (en) * 1988-07-21 1991-07-16 Nissan Motor Co., Ltd. Radial piston pump
US5158150A (en) * 1986-05-13 1992-10-27 Hydra-Powr, Inc. Hydraulic wheelchair
US5782559A (en) * 1996-09-06 1998-07-21 J-Star Industries, Inc. Self-propelled material mixer
US20070263478A1 (en) * 2006-05-15 2007-11-15 Burch Leon A Hydraulic power system
US20080144424A1 (en) * 2006-12-19 2008-06-19 Schwing America, Inc. Automatic drum rotation control concrete transit mixer truck
US20090018716A1 (en) * 2007-07-12 2009-01-15 Joseph Mario Ambrosio Parallel hybrid drive system utilizing power take off connection as transfer for a secondary energy source
US20090044993A1 (en) * 2007-08-13 2009-02-19 International Truck Intellectual Property Company, Llc Control strategy for dc emergency direct current motor for an emergency hydraulic pump
US20090095549A1 (en) * 2007-10-12 2009-04-16 Joseph Thomas Dalum Hybrid vehicle drive system and method and idle reduction system and method
US20100219007A1 (en) * 2007-07-12 2010-09-02 Odyne Systems, Llc Hybrid vehicle drive system and method and idle reduction system and method
US20140013736A1 (en) * 2011-03-24 2014-01-16 Kayaba Industry Co., Ltd Mixer drum driving device
US8746954B2 (en) * 2007-06-19 2014-06-10 Verifi Llc Method and system for calculating and reporting slump in delivery vehicles
US9061680B2 (en) 2007-07-12 2015-06-23 Odyne Systems, Llc Hybrid vehicle drive system and method for fuel reduction during idle
US9283954B2 (en) 2007-07-12 2016-03-15 Odyne Systems, Llc System for and method of fuel optimization in a hybrid vehicle
US9878616B2 (en) 2007-07-12 2018-01-30 Power Technology Holdings Llc Hybrid vehicle drive system and method using split shaft power take off
WO2019070989A1 (en) * 2017-10-06 2019-04-11 Ingios Geotechnics, Inc. Method and apparatus for forming cemented ground support columns
US10427520B2 (en) 2013-11-18 2019-10-01 Power Technology Holdings Llc Hybrid vehicle drive system and method using split shaft power take off
US11225240B2 (en) 2011-12-02 2022-01-18 Power Technology Holdings, Llc Hybrid vehicle drive system and method for fuel reduction during idle
US11584242B2 (en) 2007-07-12 2023-02-21 Power Technology Holdings Llc Hybrid vehicle drive system and method and idle reduction system and method

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1922700A (en) * 1929-11-11 1933-08-15 Transit Mixers Inc Concrete mixer
US1926692A (en) * 1930-04-24 1933-09-12 Budd Wheel Co Driving system and method of operating same
US1991094A (en) * 1933-01-10 1935-02-12 Frank R Higley Vehicle drive
US2027218A (en) * 1933-08-18 1936-01-07 Euclid Road Machinery Company Axle unit
US2275321A (en) * 1939-11-22 1942-03-03 Charles E Scates Hydraulic transmission device
US2276895A (en) * 1938-11-18 1942-03-17 Vosseler Hydraulic transmission means
US2618932A (en) * 1949-09-09 1952-11-25 Vickers Inc Pump and motor hydraulic system, including multiple pumps
US2676033A (en) * 1951-06-15 1954-04-20 C N Housh Retractable trailer connecting means
US2729435A (en) * 1952-12-20 1956-01-03 Cook Bros Equipment Co Transit concrete mixer
GB764798A (en) * 1954-03-17 1957-01-02 Int Harvester Co Improvements in or relating to tractors
US2917897A (en) * 1955-02-04 1959-12-22 Walter M Shaffer Hydraulic drive mechanism

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1922700A (en) * 1929-11-11 1933-08-15 Transit Mixers Inc Concrete mixer
US1926692A (en) * 1930-04-24 1933-09-12 Budd Wheel Co Driving system and method of operating same
US1991094A (en) * 1933-01-10 1935-02-12 Frank R Higley Vehicle drive
US2027218A (en) * 1933-08-18 1936-01-07 Euclid Road Machinery Company Axle unit
US2276895A (en) * 1938-11-18 1942-03-17 Vosseler Hydraulic transmission means
US2275321A (en) * 1939-11-22 1942-03-03 Charles E Scates Hydraulic transmission device
US2618932A (en) * 1949-09-09 1952-11-25 Vickers Inc Pump and motor hydraulic system, including multiple pumps
US2676033A (en) * 1951-06-15 1954-04-20 C N Housh Retractable trailer connecting means
US2729435A (en) * 1952-12-20 1956-01-03 Cook Bros Equipment Co Transit concrete mixer
GB764798A (en) * 1954-03-17 1957-01-02 Int Harvester Co Improvements in or relating to tractors
US2917897A (en) * 1955-02-04 1959-12-22 Walter M Shaffer Hydraulic drive mechanism

Cited By (54)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3258022A (en) * 1962-07-11 1966-06-28 Washington Iron Works Hydraulically powered drive system with pneumatic control circuit
US3160398A (en) * 1963-01-24 1964-12-08 Stothert & Pitt Ltd Concrete mixing apparatus
US3279484A (en) * 1963-04-03 1966-10-18 Ross Operating Valve Co Pressure control system
US3330289A (en) * 1964-06-08 1967-07-11 Robert W Grace Constant delivery preselected fluid flow valve control device
US3342031A (en) * 1965-06-23 1967-09-19 Gen Motors Corp Gas turbine fuel control
US3441255A (en) * 1967-10-03 1969-04-29 Case Co J I Concrete mixer apparatus
US3460812A (en) * 1968-03-25 1969-08-12 Robert R Kaufman Concrete mixing control apparatus for concrete mixing trucks
US3658303A (en) * 1969-10-17 1972-04-25 Funk Mfg Co Drive mechanism for concrete mixer
US3796518A (en) * 1971-09-07 1974-03-12 Allied Chem Lpg high pressure mobile pumping unit
US4047604A (en) * 1976-03-25 1977-09-13 Front Discharge Mixer, Inc. Apparatus for controlling the flow of concrete from a mixer
US4153393A (en) * 1977-04-15 1979-05-08 Lear Siegler, Inc. Dual pump operation of coin-operated washing system
US4329064A (en) * 1979-02-03 1982-05-11 Zahnradfabrik Friedrichshafen Ag Hydrostatic-mechanical drive for vehicular cement mixers
US4362390A (en) * 1979-08-07 1982-12-07 Zahnradfabrik Friedrichshafen, Aktiengesellschaft Drive assembly for vehicular cement mixers
FR2462930A1 (en) * 1979-08-07 1981-02-20 Zahnradfabrik Friedrichshafen DRIVE DEVICE FOR MIXER DRUMS
US4915505A (en) * 1980-04-28 1990-04-10 Geo Condor, Inc. Blender apparatus
US4850702A (en) * 1980-04-28 1989-07-25 Geo Condor, Inc. Method of blending materials
US4542990A (en) * 1982-07-28 1985-09-24 Fouquet Jean Claude Hydraulic apparatus for driving one or more hydraulic equipment devices, mounted on a semi-trailer, by means of the system motorizing the semi-trailer
US4585355A (en) * 1983-12-28 1986-04-29 Gerhard Hudelmaier Concrete mixer truck
US4547128A (en) * 1984-05-07 1985-10-15 Hayes John W Proportional mixing means
US4930994A (en) * 1986-03-06 1990-06-05 Alfred Teves Gmbh Radial piston pump
US5158150A (en) * 1986-05-13 1992-10-27 Hydra-Powr, Inc. Hydraulic wheelchair
US5032065A (en) * 1988-07-21 1991-07-16 Nissan Motor Co., Ltd. Radial piston pump
US5782559A (en) * 1996-09-06 1998-07-21 J-Star Industries, Inc. Self-propelled material mixer
US20070263478A1 (en) * 2006-05-15 2007-11-15 Burch Leon A Hydraulic power system
US20080144424A1 (en) * 2006-12-19 2008-06-19 Schwing America, Inc. Automatic drum rotation control concrete transit mixer truck
US7722243B2 (en) * 2006-12-19 2010-05-25 Schwing America, Inc. Automatic drum rotation control concrete transit mixer truck
US8746954B2 (en) * 2007-06-19 2014-06-10 Verifi Llc Method and system for calculating and reporting slump in delivery vehicles
US9643593B2 (en) 2007-07-12 2017-05-09 Power Technology Holdings Llc Hybrid vehicle drive system and method for fuel reduction during idle
US20090018716A1 (en) * 2007-07-12 2009-01-15 Joseph Mario Ambrosio Parallel hybrid drive system utilizing power take off connection as transfer for a secondary energy source
US11801824B2 (en) 2007-07-12 2023-10-31 Power Technology Holdings, Llc Hybrid vehicle drive system and method and idle reduction system and method
US20100219007A1 (en) * 2007-07-12 2010-09-02 Odyne Systems, Llc Hybrid vehicle drive system and method and idle reduction system and method
US8408341B2 (en) * 2007-07-12 2013-04-02 Odyne Systems, Llc Hybrid vehicle drive system and method and idle reduction system and method
US11584242B2 (en) 2007-07-12 2023-02-21 Power Technology Holdings Llc Hybrid vehicle drive system and method and idle reduction system and method
US11077842B2 (en) 2007-07-12 2021-08-03 Power Technology Holdings Llc Hybrid vehicle drive system and method and idle reduction system and method
US8818588B2 (en) 2007-07-12 2014-08-26 Odyne Systems, Llc Parallel hybrid drive system utilizing power take off connection as transfer for a secondary energy source
US8905166B2 (en) 2007-07-12 2014-12-09 Odyne Systems, Llc Hybrid vehicle drive system and method and idle reduction system and method
US10792993B2 (en) 2007-07-12 2020-10-06 Power Technology Holdings Llc Vehicle drive system and method and idle reduction system and method
US9061680B2 (en) 2007-07-12 2015-06-23 Odyne Systems, Llc Hybrid vehicle drive system and method for fuel reduction during idle
US9283954B2 (en) 2007-07-12 2016-03-15 Odyne Systems, Llc System for and method of fuel optimization in a hybrid vehicle
US10214199B2 (en) 2007-07-12 2019-02-26 Power Technology Holdings Llc Hybrid vehicle drive system and method and idle reduction system and method
US10071647B2 (en) 2007-07-12 2018-09-11 Power Technology Holdings Llc System for and method of fuel optimization in a hybrid vehicle
US9751518B2 (en) 2007-07-12 2017-09-05 Power Technology Holdings, Llc Hybrid vehicle drive system and method and idle reduction system and method
US9878616B2 (en) 2007-07-12 2018-01-30 Power Technology Holdings Llc Hybrid vehicle drive system and method using split shaft power take off
US7641018B2 (en) * 2007-08-13 2010-01-05 International Truck Intellectual Property Company, Llc Control strategy for DC emergency direct current motor for an emergency hydraulic pump
US20090044993A1 (en) * 2007-08-13 2009-02-19 International Truck Intellectual Property Company, Llc Control strategy for dc emergency direct current motor for an emergency hydraulic pump
US8978798B2 (en) 2007-10-12 2015-03-17 Odyne Systems, Llc Hybrid vehicle drive system and method and idle reduction system and method
US20090095549A1 (en) * 2007-10-12 2009-04-16 Joseph Thomas Dalum Hybrid vehicle drive system and method and idle reduction system and method
US9551385B2 (en) * 2011-03-24 2017-01-24 Kyb Corporation Mixer drum driving device with an auxiliary hydraulic pump to rotate a mixer drum
US20140013736A1 (en) * 2011-03-24 2014-01-16 Kayaba Industry Co., Ltd Mixer drum driving device
US11225240B2 (en) 2011-12-02 2022-01-18 Power Technology Holdings, Llc Hybrid vehicle drive system and method for fuel reduction during idle
US10427520B2 (en) 2013-11-18 2019-10-01 Power Technology Holdings Llc Hybrid vehicle drive system and method using split shaft power take off
WO2019070989A1 (en) * 2017-10-06 2019-04-11 Ingios Geotechnics, Inc. Method and apparatus for forming cemented ground support columns
US11085163B2 (en) 2017-10-06 2021-08-10 Geoqore, LLC Method and apparatus for forming cemented ground support columns
US11702813B2 (en) 2017-10-06 2023-07-18 Geoqore, LLC Method and apparatus for forming cemented ground support columns

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