US3849016A - Device for introducing rods, dowels or the like into concrete paved carriageways - Google Patents

Device for introducing rods, dowels or the like into concrete paved carriageways Download PDF

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Publication number
US3849016A
US3849016A US00305897A US30589772A US3849016A US 3849016 A US3849016 A US 3849016A US 00305897 A US00305897 A US 00305897A US 30589772 A US30589772 A US 30589772A US 3849016 A US3849016 A US 3849016A
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United States
Prior art keywords
dowels
rods
concrete
holder
guide tube
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US00305897A
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English (en)
Inventor
K Cochrane
R Holloway
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mcgregor R & Sons Ltd gb
MCGREGOR SONS Ltd ROBERT
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MCGREGOR SONS Ltd ROBERT
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Application filed by MCGREGOR SONS Ltd ROBERT filed Critical MCGREGOR SONS Ltd ROBERT
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Publication of US3849016A publication Critical patent/US3849016A/en
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Expired - Lifetime legal-status Critical Current

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    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
    • E01C23/04—Devices for laying inserting or positioning reinforcing elements or dowel bars with or without joint bodies; Removable supports for reinforcing or load transfer elements; Devices, e.g. removable forms, for making essentially horizontal ducts in paving, e.g. for prestressed reinforcements

Definitions

  • ABSTRACT plate of a concrete paving machine one or more guide tubes connected to the holder, and trigger means for timing the release of rods or dowels located by the holder to pass through the or each tube for positioning in the wet concrete.
  • This invention relates to a device for introducing rods, dowels or the like into concrete paved carriageways. More particularly, the invention relates to such a device for inserting rods or dowels into unreinforced concrete paving so as to extend across the joints in the resultant slabs, thereby acting as load-transfer dowels, and/or tie bars to prevent the joints opening out.
  • the paving is laid in a continuous length and provision is made so that the paving cracks at predetermined places, the cracks being bridged by the rods or dowels. The cracks can be induced, for example, by notching the concrete surface at the desired location.
  • This device substantially eliminates the disadvantages encountered when the rods or dowels are mounted on the sub-base.
  • the invention provides a device for introducing rods, dowels or the like into concrete paved carriageways, such device comprising a holder positioned in front of the conforming plate of a concrete paving machine, one or more guide tubes connected to the holder, and trigger means for timing the release of rods or dowels located by the holder to pass through the or each guide tube for positioning in the wet concrete.
  • FIGS. 3 and 4 are enlarged diagrammatic crosssections showing the feeding of therods or dowels.
  • the drawings show a device for introducing rods, dowels or the like into wet concrete paved carriageways, the device comprising a holder in the form of a beam 10 positioned on a concrete paving machine in front of a conforming plate 11 of the concrete paving machine.
  • a plurality of guide tubes 12 are connected to the beam 10 which houses trigger means 13 for timing the release of rods or dowels 14 which pass along the guide tubes 12 into the web concrete 15.
  • Each guide tube 12 comprises a respective circularsectioned first part 16 which is approximately the length of the rods or dowels 14 and which tapers and merges with a respective reduced diameter second part 17. At the free end of each second part 17, a respective upper portion of the tube is removed to form steps 18.
  • the trigger means 13 comprises a movable crosshead 19 upon which are mounted a plurality of pusher fingers 20, one finger 20 being provided for each guide tube 12 so as to engage the lowermost rod or dowel 14 of a stack of dowels located in a respective magazine 21.
  • Dowels or rods 14 may be fed by hand into each magazine 21 through respective flared tubes 22.
  • the usual pre vibrators 23, 24 operated by means not shown, are provided to improve the consistency of the I concrete passing beneath the conforming plate 11.
  • the trigger means 13 may be actuated manually or automatically so as to ensure that the rods or dowels 14 are positioned as desired.
  • FIG. 3 shows the trigger means 13 at the ready position wherein the crosshead 19 is ready to commence pushing the lowermost rods or dowels, via the fingers 20, into the guide tubes 12.
  • FIG. 4 illustrates the dowel insertion stroke, wherein three dowels 14 are required in the: tubes 12 to push the dowel 14 nearest the open end of the tubes into the wet concrete.
  • the crosshead 19 moves rearwards relative to the concrete paving machine at the same speed as the machine moves relative to the ground; that is, the rods or dowels 14 being inserted into the wet concrete are stationary relative to the ground.
  • the crosshead 19 When the crosshead 19 has reached the limit of its travel, it automatically returns to its position as shown in FIG. 3, the fingers 20 being spring-loaded to clear the rods or dowels 14 30 the return stroke.
  • the first parts 16 of the guide tube 12 are approximately one and a half inches inside diameter, whilst the second parts 17 are approximately one and an eighth inches inside diameter. It has been found in practice that rods or dowels can be fed along guide tubes as shown in the drawings more easily than along tubes of constant diameter.
  • the guide tubes 12 are positioned to lay rods or dowels 14 at a lateral spacing of about l2 inches (approximately 300 mm) across the width of a concrete carriageway and joints are wet formed, for example, by notching the surface of the concrete, so that the joints extend through the rods or dowels 14.
  • the length of the guide tubes 12 is arranged so that the tubes protrude into the web concrete beneath the conforming plate 11 and terminate at a position where the concrete is sufficiently mobile to ensure that no unintentional voids are formed, but not so mobile as to produce any appreciable displacements of the rods or dowels 14 in the vertical or horizontal directions.
  • the ends of the tubes are stepped as shown at 18.
  • the trigger means 13 can be operated mechanically, electrically, hydraulically or pneumatically or can use any combination of these power systems so that the rods or dowels 14 are ejected into the wet concrete at a rate proportional to the forward ground speed of the paving machine.
  • the invention provides a simple, easy to manufacture and easy to operatedevice for inserting accurately positioned rods or dowels into wet concrete pavement, and in particular slip-formed pavement, without the use of any form of ancillary supports for the rods or dowels.
  • the invention is not limited to the precise details of 5 the foregoing example, and variations may be made thereto.
  • the trigger means 13 may be other than that shown and the guide tubes 12 may have a constant diameter along their length.
  • the steps 18 can be of any desired shape and size.
  • a device for introducing rods, dowels or the like into concrete paved carriageways comprising a holder positioned in front of the conforming plate of a concrete paving machine, magazine means providing a supply of rods or dowels within said holder, a guide tube connected to the holder, in position to longitudinally receive rods or dowels from said magazine means, and means for extracting rods or dowels from said magazine in the holder and moving them endwise into and through said guide tube for positioning in the wet concrete.
  • said extracting means comprises a movable crosshead upon which are mounted a plurality of spring-loaded pusher fingers, one finger being provided for each guide tube so as to engage the lowermost rod or dowel of a stack of dowels located in a respective magazine and move it into the guide tube.
  • said guide tube comprises a respective first partwhich tapers and merges with a respective second part of reduced crosssection.
  • previbrators are provided in front of the conforming plate to improve the consistency of the wet concrete passing under the plate.
  • a device as claimed in claim 1, wherein the length of said guide tube is such that the tube protrudes into the wet concrete beneath the conforming plate and terminates at a position where the concrete is sufficiently mobile to ensure that no unintentional voids are formed, but not so mobile as to produce any appreciable displacements of the rods imbedded or dowels in the vertical or horizontal directions.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Road Paving Machines (AREA)
  • Road Paving Structures (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
  • Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
US00305897A 1971-12-23 1972-11-13 Device for introducing rods, dowels or the like into concrete paved carriageways Expired - Lifetime US3849016A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5985471A GB1404139A (en) 1971-12-23 1971-12-23 Device for introducing rods, dowels or the like into concrete paved carriageways

Publications (1)

Publication Number Publication Date
US3849016A true US3849016A (en) 1974-11-19

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ID=10484528

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US00305897A Expired - Lifetime US3849016A (en) 1971-12-23 1972-11-13 Device for introducing rods, dowels or the like into concrete paved carriageways

Country Status (7)

Country Link
US (1) US3849016A (show.php)
BE (1) BE793214A (show.php)
CA (1) CA980613A (show.php)
FR (1) FR2164580B3 (show.php)
GB (1) GB1404139A (show.php)
IT (1) IT974189B (show.php)
ZA (1) ZA727997B (show.php)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4312602A (en) * 1979-11-19 1982-01-26 Pav-Saver Mfg. Co. Wet concrete pavement spreading machine and reinforcing rod layer
US4566822A (en) * 1981-09-24 1986-01-28 Miller Formless Co., Inc. Construction machine
US4636110A (en) * 1983-11-17 1987-01-13 Gtm-Entrepose Sliding formwork machine with two extruding plates for constructing continuously reinforced concrete roadways
US6052964A (en) * 1998-03-16 2000-04-25 Ferm; Carl A. Method for restoring load transfer capability
US20030041556A1 (en) * 2001-08-13 2003-03-06 Casters Francois Joseph Method and machine for forming a concrete path or the like, as well as device for inserting dowels applied herewith

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2150547C1 (ru) * 1998-09-24 2000-06-10 Айрапетов Георгий Андронникович Способ изготовления монолитных оснований высокоскоростных железных дорог

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US286861A (en) * 1883-10-16 Teeeitoey
US1996153A (en) * 1929-12-19 1935-04-02 John N Heltzel Road building apparatus
US2225015A (en) * 1937-02-19 1940-12-17 Procedes Tech Const Method and means for producing concrete structures
US2544113A (en) * 1945-09-04 1951-03-06 Edwin B Snead Turntable road machine
US3083621A (en) * 1958-08-06 1963-04-02 Republic Steel Corp Machine for laying reinforcing bars in concrete pavement
US3261272A (en) * 1963-06-11 1966-07-19 Renner Co Curb forming machine
US3274906A (en) * 1963-12-09 1966-09-27 Edoco Technical Products Joint installation apparatus
US3443495A (en) * 1967-11-29 1969-05-13 Carl J Heltzel Concrete reinforcing steel handling and placing device
US3749505A (en) * 1968-11-07 1973-07-31 Miller Formless Co Inc Concrete curb laying machine

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US286861A (en) * 1883-10-16 Teeeitoey
US1996153A (en) * 1929-12-19 1935-04-02 John N Heltzel Road building apparatus
US2225015A (en) * 1937-02-19 1940-12-17 Procedes Tech Const Method and means for producing concrete structures
US2544113A (en) * 1945-09-04 1951-03-06 Edwin B Snead Turntable road machine
US3083621A (en) * 1958-08-06 1963-04-02 Republic Steel Corp Machine for laying reinforcing bars in concrete pavement
US3261272A (en) * 1963-06-11 1966-07-19 Renner Co Curb forming machine
US3274906A (en) * 1963-12-09 1966-09-27 Edoco Technical Products Joint installation apparatus
US3443495A (en) * 1967-11-29 1969-05-13 Carl J Heltzel Concrete reinforcing steel handling and placing device
US3749505A (en) * 1968-11-07 1973-07-31 Miller Formless Co Inc Concrete curb laying machine

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4312602A (en) * 1979-11-19 1982-01-26 Pav-Saver Mfg. Co. Wet concrete pavement spreading machine and reinforcing rod layer
US4566822A (en) * 1981-09-24 1986-01-28 Miller Formless Co., Inc. Construction machine
US4636110A (en) * 1983-11-17 1987-01-13 Gtm-Entrepose Sliding formwork machine with two extruding plates for constructing continuously reinforced concrete roadways
US6052964A (en) * 1998-03-16 2000-04-25 Ferm; Carl A. Method for restoring load transfer capability
US6532714B1 (en) 1998-03-16 2003-03-18 Carl A. Ferm Method for restoring load transfer capability
US20030041556A1 (en) * 2001-08-13 2003-03-06 Casters Francois Joseph Method and machine for forming a concrete path or the like, as well as device for inserting dowels applied herewith
US7037035B2 (en) * 2001-08-13 2006-05-02 Drion Constructie Method and machine for forming a concrete path or the like, as well as device for inserting dowels applied herewith
US20060104717A1 (en) * 2001-08-13 2006-05-18 Casters Francois J Method and machine for forming a concrete path
US7214001B2 (en) 2001-08-13 2007-05-08 Drion Constructie, Besloten Vennootschap Met Beperkte Aansprakeliikheid Method and machine for forming a concrete path
US20070160422A1 (en) * 2001-08-13 2007-07-12 Casters Francois J Method and machine for forming a concrete path
US20070196172A1 (en) * 2001-08-13 2007-08-23 Casters Francois J Method and machine for forming a concrete path
US7303355B2 (en) 2001-08-13 2007-12-04 Drion Constructie, Besloten Vennootschap Method and machine for forming a concrete path

Also Published As

Publication number Publication date
GB1404139A (en) 1975-08-28
DE2259040A1 (de) 1973-07-05
BE793214A (fr) 1973-04-16
IT974189B (it) 1974-06-20
ZA727997B (en) 1973-07-25
FR2164580B3 (show.php) 1976-01-09
FR2164580A1 (show.php) 1973-08-03
CA980613A (en) 1975-12-30
DE2259040B2 (de) 1977-02-03

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