Supported Dowel End Patents (Class 404/62)
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Patent number: 11578491Abstract: A method of laying one or more concrete topping slabs over an existing concrete structure includes providing a concrete form defining an area on a surface of the concrete structure, drilling a hole into the surface of the concrete structure within the area, the hole being closer to a first border of the concrete form than to a second border of the concrete form opposite the first border, attaching first and second slip-dowel receiving sheaths respectively to the first and second borders, securing a first end portion of a bent metal bar in the hole with a second end portion of the bent metal bar extending parallel to the surface and the slip-dowel receiving sheaths toward the second border, and pouring a concrete mixture over the surface of the concrete structure and about the first and second slip-dowel receiving sheaths and the second end portion of the bent metal bar.Type: GrantFiled: February 7, 2020Date of Patent: February 14, 2023Assignee: Shaw Craftsmen Concrete, LLCInventors: Ronald D. Shaw, Jeff Counterman
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Patent number: 11434612Abstract: Various embodiments of the present disclosure provide a cast-in-place concrete slab load transfer apparatus and method of manufacturing same. In various embodiments, the concrete slab load transfer apparatus includes a plurality of load transfer dowels each having a top surface and a bottom surface, a basket supporting the load transfer dowels, and a plurality of welds including a plurality of breakable welds connecting the bottom surfaces of the load transfer dowels to the basket.Type: GrantFiled: November 9, 2020Date of Patent: September 6, 2022Assignee: Illinois Tool Works Inc.Inventors: Robert Alan Rodden, Zafar Imtiaz Ali, Matthew Douglas St. Louis, Randall Derek Riffle, Eddie Kao, Jimmy Lee Hall
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Patent number: 10837144Abstract: Various embodiments of the present disclosure provide a cast-in-place concrete slab load transfer apparatus and method of manufacturing same. In various embodiments, the concrete slab load transfer apparatus includes a plurality of load transfer dowels each having a top surface and a bottom surface, a basket supporting the load transfer dowels, and a plurality of welds including a plurality of breakable welds connecting the bottom surfaces of the load transfer dowels to the basket.Type: GrantFiled: February 19, 2019Date of Patent: November 17, 2020Assignee: Illinois Tool Works Inc.Inventors: Robert Alan Rodden, Zafar Imtiaz Ali, Matthew Douglas St. Louis, Randall Derek Riffle, Eddie Kao, Jimmy Lee Hall
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Patent number: 10774479Abstract: A concrete dowel slip tube assembly is provided for use in maintaining a planner consistency of a cured concrete slab formed on a support surface. The assembly comprises a plurality of elongate slip tubes, each having a length dimension and a tubular hollow interior compartment. Dowels are slidingly engageable to the hollow interior compartment to allow for translation along the interior compartment. A support frame defines a plurality of integral slip tube retaining members, disposed at evenly spaced locations along the support frame, the retaining members being configured to receive and engage associated slip tubes to the support frame in a common defined orientation. The support frame and the retaining members are formed as a unitary construction.Type: GrantFiled: January 10, 2020Date of Patent: September 15, 2020Assignee: Shaw & Sons, Inc.Inventors: Ronald D. Shaw, Javier Garcia
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Patent number: 10662642Abstract: A floor dowel sleeve has a body portion with a top wall, a bottom wall, two side walls, and an end wall that together to surround an interior cavity. The interior cavity is configured to receive a dowel plate at an opening in the body portion opposite the end wall. Spacing elements are disposed at each of the two side walls and are configured to interface with opposing edges of the dowel plate to provide a space between the dowel plate and interior surfaces of the two side walls. The spacing elements each have a pair of legs that integrally protrude from the side wall into the interior cavity and interconnect to form a spacing chamber. The spacing elements are each configured to flex into the spacing chamber upon lateral horizontal movement of the dowel plate within the interior cavity.Type: GrantFiled: March 27, 2019Date of Patent: May 26, 2020Assignee: Midwest Concrete & Masonry Supply, Inc.Inventor: Marinus Hansort
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Patent number: 10119276Abstract: In one aspect, a reinforcing assembly includes multiple longitudinally-extending support bars that are connected together and multiple working members each independently connected to one or more of the support bars. The working members are oriented diagonally with respect to a longitudinal axis extending along the support bars. Each working member includes a downwardly-extending side and a hooked or bent portion at an end of the downwardly-extending side. In another aspect, a reinforcing assembly includes one or more longitudinally-extending bars each configured to provide structural reinforcement within a structure. The reinforcing assembly also includes multiple working members each independently connected to at least one of the one or more bars. The working members are oriented diagonally with respect to a longitudinal axis extending along the one or more bars. Each working member includes a downwardly-extending side and a hooked or bent portion at an end of the downwardly-extending side.Type: GrantFiled: July 11, 2017Date of Patent: November 6, 2018Inventor: Richard P. Martter
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Patent number: 8911173Abstract: A pavement slab including top and bottom surfaces, first and second longitudinal side surfaces, and first and second transverse side surfaces. The slab includes a first and second plurality of transverse holes formed within the first and second longitudinal side surfaces, respectively, a first and second plurality of longitudinal holes formed within the first and second plurality of transverse holes, respectively, and plurality of dowel bars. Each of the holes is sized and shaped to receive slidably a corresponding one of the plurality of dowel bars. Each of the dowel bars is slidable between a retracted position and an extend position in which the dowel bar forms a joint between the slab and another slab or preexisting pavement.Type: GrantFiled: March 14, 2013Date of Patent: December 16, 2014Assignee: Jersey Precast Corporation, Inc.Inventor: Amir Ulislam
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Patent number: 8573884Abstract: Systems and methods of transferring loads between adjacent cast-in-place slabs, such as concrete slabs, and for accurately positioning dowels between adjacent sections of slabs are provided. A generally planar plate-type dowel is used which may be positioned within a cutaway in a preexisting slab of concrete. The dowel is shaped to generally conform to the shape of the cutaway, which is made by a saw blade. Once the dowel is positioned within the preexisting slab, a new slab is poured adjacent the preexisting slab. Rubber seals are included on the edges of the dowels to provide spacing or a gap between the dowel and the preexisting slab to allow for lateral independent movement of the adjacent slabs, and to prevent concrete from the newly poured second slab from entering into the gap. A saw unit for making a generally planar cut horizontally into an edge of a hardened concrete slab is also provided.Type: GrantFiled: January 8, 2013Date of Patent: November 5, 2013Inventor: Donald S. Nadler
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Publication number: 20130209171Abstract: A pavement dowel bar assembly is reinforced to maintain the alignment of dowel bars during the paving process. An exemplary dowel bar assembly includes a side frame having at least one bracing member. The bracing member is convertible between a first, stored position and a second, deployed position. When in the first, stored position, the bracing member is generally parallel to a plane defined by the side frame. In the second, deployed position, the bracing member is at an angle relative to the plane of the side frame. The dowel bar assembly may further include a plurality of dowel bars and a second side frame. Also described herein are methods of reinforcing a pavement dowel bar assembly with a convertible bracing member.Type: ApplicationFiled: February 10, 2012Publication date: August 15, 2013Inventor: James Thomas
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Patent number: 8496398Abstract: A rebar sleeve device comprising a tubular unit with an opening at least one end thereof for receipt of a rebar dowel is described. The tubular unit is typically positioned horizontally and can be elevated by a back extension component and a front extension component secured to the base unit. The front extension component comprises an opening through which the rebar dowel is inserted. The opening of the front extension component comprises a protective covering. The protective covering prevents concrete from filling in the opening, but allows for the insertion of a rebar dowel. A connection component connects a plurality of the rebar sleeve devices together to form a single unit.Type: GrantFiled: August 4, 2010Date of Patent: July 30, 2013Inventor: Michael DiPietro
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Patent number: 8465222Abstract: A tapered dowel bar for transferring loads across a joint between adjacent concrete slabs is disclosed. The dowel tapers from one relatively wide cross section into one or more relatively narrow ends. The shape of the dowel is optimized to provide the highest amount of steel along the joint where the loads are highest. The tapered dowel is embedded in one or both sides into a socket assembly that connects the dowel to essentially planar top and bottom surfaces of a pocket former embedded in the concrete. The load transfer assembly restricts any relative vertical displacement between the first and second slabs. The socket assembly embedded in the pocket former or equipped with compressible material accommodates relative horizontal movement between adjacent slabs in directions essentially parallel and perpendicular to the joint.Type: GrantFiled: March 19, 2012Date of Patent: June 18, 2013Inventors: Ziad Ghauch, Hadi Ghauch
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Patent number: 7967528Abstract: A dowel sleeve has a tubular body with a mounting assembly at one end for releasable connection to a construction plate, and a leg support engagable at the other end for adjustable support. The construction plate has spaced non-circular holes. A first flange of the mounting assembly has a complementary profile, of smaller dimensions, to the non-circular holes, while a second flange has a similar profile, of larger dimensions, with its major-axis non-aligned with the major-axis of the first flange. The first flange is inserted through one of the non-circular holes, and the tubular body is rotated so the first and second flanges engage opposed faces of the construction plate. The leg support has a spigot engagable in the tubular body, the exterior of which is engaged by an abutment face. The effective length of the support leg is adjustable by selectively detaching one or more leg member segments, each provided with a disc-like base member.Type: GrantFiled: October 2, 2009Date of Patent: June 28, 2011Assignee: Connolly Key Joint Pty Ltd.Inventors: John Mercer, Mark Anthony Connolly
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Publication number: 20110085857Abstract: Disclosed are a concrete dowel placement devices and a method of utilizing the same. A metallic stud is driven, screwed, or otherwise attached to a form. The stud may be a unitary structure, or may be a hollow tube with conventional fastening means such as nails and screws extending through and holding the hollow tube to the form. A cover having an interior compartment substantially equal in diameter to the stud is slidably placed thereon, and a first enclosed area is developed with a plurality of forms. Concrete is poured into the first enclosed area, and upon curing, the form and the stud are removed, leaving the cover embedded in the concrete. A metallic dowel is inserted into the cover, and a second enclosed area is developed with like configured forms. The metallic dowel extends into the second enclosed area.Type: ApplicationFiled: December 16, 2010Publication date: April 14, 2011Inventors: Lee A. Shaw, Ronald D. Shaw
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Patent number: 7905680Abstract: Provided herein are a concrete dowel placement device and methods of use. The device 100 generally comprises a dowel receiving sleeve 110, a flange 120 formed to extend perpendicularly and completely about an open end b of the dowel receiving sleeve and at least one tooth-like locking structure 140a,b integrally formed on the outer surface 111 of the sleeve and proximate to the flange. The combination of the flange and the tooth-like locking structure secures the deviced to a concrete form so that a dowel rod 150 or piece of rebar placed therein maintains its position during a concrete pour.Type: GrantFiled: September 5, 2007Date of Patent: March 15, 2011Inventors: Steve Albritton, Earl Remmert, Ming Liang
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Publication number: 20100086351Abstract: A dowel sleeve has a tubular body with a mounting assembly at one end for releasable connection to a construction plate, and a leg support engagable at the other end for adjustable support. The construction plate has spaced non-circular holes. A first flange of the mounting assembly has a complementary profile, of smaller dimensions, to the non-circular holes, while a second flange has a similar profile, of larger dimensions, with its major-axis non-aligned with the major-axis of the first flange. The first flange is inserted through one of the non-circular holes, and the tubular body is rotated so the first and second flanges engage opposed faces of the construction plate. The leg support has a spigot engagable in the tubular body, the exterior of which is engaged by an abutment face. The effective length of the support leg is adjustable by selectively detaching one or more leg member segments, each provided with a disc-like base member.Type: ApplicationFiled: October 2, 2009Publication date: April 8, 2010Applicant: CONNOLLY KEY JOINT PTY LTDInventors: John Mercer, Mark Anthony Connolly
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Patent number: 7677832Abstract: A pre-fabricated concrete slab system and method have matching rectangular slabs with cooperatively fitting male and female type connectors which fit adjacent to each other in a checkerboard fashion. The slabs include spaced reinforcing rods extending longitudinally and transversely therethrough. In at least some of the slabs, the rods' distal ends protrude outwardly away from one or more side edges of the slabs to form a plurality of male connectors. Correspondingly, at least some of the slabs include a plurality of corresponding female sockets on one or more sides thereof, each female socket receiving a corresponding male connector when dropped therein. Through interconnection of corresponding female sockets and male connectors by steel reinforcing bars extending in both the longitudinal and transverse directions, a continuous tension reinforcement is established between adjacent slabs in both the longitudinal and transverse directions.Type: GrantFiled: September 29, 2006Date of Patent: March 16, 2010Assignee: Kwik Slab, LLCInventor: Alfred A. Yee
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Patent number: 7632037Abstract: A dowel includes a corrosion-resistant sleeve, and a rod positioned within the sleeve. A sealant connects the corrosion-resistant sleeve and the rod. A method for constructing a dowel includes positioning a rod within a corrosion-resistant sleeve, and sealing the rod with respect to the corrosion-resistant sleeve.Type: GrantFiled: August 5, 2004Date of Patent: December 15, 2009Assignee: Construction Materials, Inc.Inventor: Mark Brinkman
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Patent number: 7441984Abstract: A plurality of sleeve members for receiving and maintaining a dowel bar therewithin can be provided so that the dowel bar does not transmit substantial shear stresses to the concrete during the contraction and expansion of the concrete. The sleeve members can comprise (a) at least one hollow interior compartment for receiving and supporting said dowel bar, and (b) at least one aperture for receiving a bracket member. The dowel bar can have a tapered configuration and a pair of end sections. The dowel bar can be located within the hollow interior compartment for maintaining adjacent sections of concrete in alignment during contraction and expansion of the concrete, and for transferring shear stresses and bending moments across a joint formed between adjacent concrete slabs. The dowel bar can move in a lateral and/or longitudinal path within the hollow interior compartment and exerting interactive forces in response to the expansion and contraction of the concrete.Type: GrantFiled: July 22, 2005Date of Patent: October 28, 2008Inventor: Donald R. Kramer
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Patent number: 7404691Abstract: An apparatus for combining adjacent concrete slabs including a dowel, an end cap, and a side frame. The end cap has a hood defining a curved channel extending at least partially around a dowel receiving end. The side frame has at least one wire received in the curved channel. Also, an end cap having an integrally formed supporting portion including first and second wire supports for supporting substantially parallel side frame cross wires. Also, an end cap including first and second sleeves positioned along opposing tangents of the outer peripheral surface of the end cap for receiving differing portions of a side frame, and further including a resilient protrusion for receiving a further differing portion of the side frame.Type: GrantFiled: November 15, 2007Date of Patent: July 29, 2008Assignee: Dayton Superior CorporationInventors: Clifford D. Bennett, Kenneth Lee
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Patent number: 7314334Abstract: An apparatus for combining adjacent concrete slabs including a dowel, an end cap, and a side frame. The end cap has a hood defining a curved channel extending at least partially around a dowel receiving end. The side frame has at least one wire received in the curved channel. Also, an end cap having an integrally formed supporting portion including first and second wire supports for supporting substantially parallel side frame cross wires. Also, an end cap including first and second sleeves positioned along opposing tangents of the outer peripheral surface of the end cap for receiving differing portions of a side frame, and further including a resilient protrusion for receiving a further differing portion of the side frame.Type: GrantFiled: August 3, 2006Date of Patent: January 1, 2008Assignee: Dayton Superior CorporationInventors: Clifford D. Bennett, Kenneth Lee
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Patent number: 7201535Abstract: A sleeve assembly system, a concrete dowel slab joint system, a method for maintaining adjacent sections of concrete in alignment during contraction and expansion of the concrete and for transferring shear stresses and bending moments across a joint formed between adjacent concrete slabs, and a concrete slab including a plurality of concrete dowel slab joint systems are provided. The concrete dowel slab joint system comprises the sleeve assembly for receiving and maintaining the dowel bar therewithin. The sleeve assembly is designed so that the dowel bar does not transmit substantial shear stresses to the concrete during the contraction and expansion of the concrete. A pair of bracket members, located on an underlying surface, support the sleeve assembly and the dowel bar above the underlying surface.Type: GrantFiled: February 10, 2005Date of Patent: April 10, 2007Inventor: Donald R. Kramer
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Patent number: 7134805Abstract: A pre-fabricated concrete slab system and method have matching rectangular male and female type slabs which fit adjacent to each other in a checkerboard fashion. The male slabs include spaced reinforcing rods extending longitudinally and transversely through the male slabs with the rods' distal ends protruding outwardly away from one or more side edges of the male slabs to form a plurality of male connectors. The female slabs include a plurality of corresponding female sockets on one or more sides of the female slab, each female socket receiving a corresponding male connector when dropped therein. Corresponding female sockets positioned on opposite side edges of the female slabs are interconnected by steel reinforcing bars in both the longitudinal and transverse directions in a configuration similar to the male slabs so that, when connected, a continuous tension reinforcement is established between male and female slabs in both the longitudinal and transverse directions.Type: GrantFiled: April 1, 2004Date of Patent: November 14, 2006Assignee: Kwik Slab, LLCInventor: Alfred A. Yee
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Patent number: 7069703Abstract: A method and system are provided for constructing large, continuous, concrete slabs without using conventional shrinkage joints. The system comprises a grid of closely-spaced crack inducers (2) arranged relative to a concrete-pouring surface and adapted to be covered by concrete. The crack inducers (2) may be connected to one another with connectors (10). The crack inducers (2) are of a size, shape and spacing to promote formation of fine cracks in the vicinity of the inducers (2) throughout the slab when the concrete sets.Type: GrantFiled: February 4, 2003Date of Patent: July 4, 2006Assignee: Building Innovations Pty LtdInventors: Warwick Ian Colefax, Robert Foster Colefax, Miro Getaldic
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Patent number: 7048740Abstract: The surgical reamer has a hollow dome with apertures spaced apart arranged in arcs extending from an apex of the dome to the base portion of the dome, and removable teeth positioned in the apertures. Each cutting tooth has a flange that is aligned flush with the external surface of the dome, and a raised cutting edge extending above the flange and the external surface of the dome, and an interior passageway communicating between the outside and inside of the dome. In one embodiment, a base plate is removably secured on the base portion of the dome to provide closure of the central cavity of the dome.Type: GrantFiled: February 7, 2003Date of Patent: May 23, 2006Assignee: Precimed SAInventors: Patrick M. White, Meyer Fishbein
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Patent number: 6745532Abstract: The invention relates to the articulated imbrication of concrete slabs i(in situ) wherein joints are formed by laying i(in situ), along joint lines, a simple armored mesh device with a cut and fold pattern which has been already prepared in the workshop. Advantage is taken from the retraction phenomenon in order to achieve an alternative indentation along the joints of adjacent slabs of continuous cast concrete, susceptible of forming satisfactorily a knee—or gimbal-joint connection between the joints. The process is complemented with a concrete separator element which facilitates the formation of the crack and prevents water from reaching the platform, and which can be fixed to said device. The invention applies to concrete surface roads, highways and harbour zones of goods warehouses and enables to design and make road surfaces without bases and subbases.Type: GrantFiled: January 3, 2001Date of Patent: June 8, 2004Inventor: Jose Ramon Vazquez Ruiz del Arbol
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Patent number: 6502359Abstract: An expendable concrete dowel placement apparatus comprising a concrete form and a dowel holder capable of quickly positioning a dowel perpendicular to the surface of the concrete form, thereby allowing the finished concrete slab to expand and contract relative to a control joint without the dowel causing the concrete to yield. The concrete form maintains a plurality of square or rectangular apertures which receive the dowel bar holders. Each dowel bar holder maintains a plurality of retention clips and a flange located at its open proximal end which positively positions the dowel bar holder within the apertures of the concrete form in a position perpendicular to the front surface of the central vertical member of the concrete form. The concrete form is composed of a non-typical shape which allows the control joint to transfer loads to adjoining concrete slabs through the length of the control joint.Type: GrantFiled: February 15, 2001Date of Patent: January 7, 2003Assignee: Bometals, Inc.Inventor: Todd Rambo
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Patent number: 6475221Abstract: The surgical reamer (20) has a hollow dome (24) with apertures (26) spaced apart arranged in arcs (28) extending from an apex (30) of the dome to the base portion (32) of the dome, and removable teeth (22) positioned in the apertures. Each cutting tooth (22) has a flange (52) that is aligned flush with the external surface of the dome (24), and a raised cutting edge (50) extending above the flange and the external surface (36) of the dome, and an interior passageway (39) communicating between the outside and inside of the dome. In one embodiment, a base plate (56) is removably secured on the base portion (32) of the dome (24) to provide closure of the central cavity (34) of the dome.Type: GrantFiled: November 15, 2001Date of Patent: November 5, 2002Inventors: Patrick M. White, Meyer Fishbein
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Patent number: 6471441Abstract: A shear-load chuck which is mounted between two members and has a multi-layer structure for transmitting dynamic loads. The multi-layer shear-load chuck is mounted on one surface of a junction like in the traditional bushing of a shear load chuck. A support basket is arranged correspondingly on both sides of the junction and has an end plate as well as at least one strap-like loop. The end plate forms together with the at least one strap-like loop a closed load system. The support basket is attached to the shear-load chuck on one surface of the junction, while it is attached to the bushing on the other surface of the junction. It is further possible to change the cross-sectional shape of the multi-layer shear-load chuck as well as the structural shape of the strap-like loop.Type: GrantFiled: August 7, 2000Date of Patent: October 29, 2002Assignee: Pecon AGInventor: Erich Müller
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Patent number: 6210070Abstract: A concrete dowel placement apparatus for use with continuous pour concrete slabs comprising at least one slip tube, a concrete support dowel insertable into a respective slip tube and a wire mesh supporting structure. The slip tube comprises an elongate tubular sheath with a closed end, and an open end for slidable insertion of the concrete support dowel. Additionally, attached to an exterior surface of the sheath is a clip which is engagable to the wire mesh support structure. Therefore, the slip tube is attachable to the wire mesh structure such that the dowel is positionable within a continuous pour concrete slab at a prescribed location. The slip tube provides lateral movement of the dowel within the slab to thereby prevent fracturing of the slab in areas near sawcuts. The support structure may be formed from different configurations to facilitate positioning of the slip tubes and respective concrete support dowels supported therein.Type: GrantFiled: April 14, 1999Date of Patent: April 3, 2001Inventors: Ron D. Shaw, Lee A. Shaw
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Patent number: 6171016Abstract: A tubular reinforcing dowel system includes a plurality of fiber composite hollow, tubular dowel tubes comprising a first material and each including a longitudinally-extending bore. The dowel tube bores are filled with a second material, such as hydraulic cement, to form dowel members. The dowel members are mounted on a basket assembly which includes a pair of horizontal runners and multiple, longitudinally-aligned pairs of stands mounted on the runners. Each stand is connected to a respective dowel member end. A reinforcing method includes the steps of mounting multiple reinforcing dowel members on a basket assembly, placing the basket assembly on a crushed rock base of a roadway and pouring a cement slab on top of the base and encasing the dowel members underneath a transverse construction joint.Type: GrantFiled: October 20, 1998Date of Patent: January 9, 2001Assignee: Concrete Systems, Inc.Inventors: Dennis A. Pauls, John Thomas Whiteman
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Patent number: 6145262Abstract: A rectangular dowel bar sleeve is disclosed for receiving dowel bars and tie-bars that allows opening and closing of joints between adjacent cast-in-place slabs and pavements while allowing differential lateral movement of adjacent cast-in-place slabs in either direction parallel to the longitudinal axis of the joint and while preventing differential vertical movement of the slabs on either side of the joint. A form panel having an alignment ridge and spaced apart holes for attaching blockout bars to the form panel is disclosed. The blockout bars can be used to accurately create voids extending perpendicularly from the form panel and having upper and lower surfaces that are parallel to the intended upper surface of the cast-in-place slab.Type: GrantFiled: November 12, 1998Date of Patent: November 14, 2000Assignee: Expando-Lok, Inc.Inventors: Ernest K. Schrader, Russell Boxall, Nigel K. Parkes
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Patent number: 6092960Abstract: A concrete joint restraint system that is adapted for securing a dowel to first and second horizontal members that are spaced apart from one another and located at a desired height above a subgrade prior to placement of concrete. The system includes a closed clip including a cylinder with an end aperture for receiving one end of the dowel and a snap-on connection for connecting the open clip to the first horizontal member. The system further includes an open clip including a pair of flexible, arcuate side walls that define an elongated gap for receiving the other end of the dowel and a snap-on connection for coupling the closed clip to the second horizontal member. The system beneficially permits plastic, fiberglass reinforced plastic, or other non-metallic dowels to be supported between inexpensive rebar bolsters made of steel wire.Type: GrantFiled: October 27, 1998Date of Patent: July 25, 2000Inventor: James P. McCallion
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Patent number: 5934821Abstract: A concrete dowel placement apparatus comprising a base member and an elongate, tubular dowel receiving sheath which is connectible to the base member. The base member comprises an outer sleeve having first and second ends and a flange portion which extends about the first end of the outer sleeve and defines front and back surfaces and a peripheral edge. The base member further comprises an inner sleeve which is disposed within the outer sleeve and defines an aperture extending longitudinally therethrough to the back surface of the flange portion. Extending between the inner and outer sleeves is at least one reinforcement wall. The sheath has an open proximal end, a closed distal end, and a hollow interior compartment extending longitudinally therein. The open proximal end of the sheath is extensible over the outer sleeve such that at least a portion of the outer sleeve resides within the interior compartment.Type: GrantFiled: May 30, 1997Date of Patent: August 10, 1999Inventors: Lee A. Shaw, Ronald D. Shaw
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Patent number: 5870869Abstract: A yielding tie bar transfers load stress across a joint between adjacent concrete slabs, and accommodates internal movement of the slabs to reduce cracking. A combination of adjacent slabs have a cracking strength and comprise a plurality of such tie bars. A yieldable strip made of yieldable metal is welded to the bar and mounted near each end of the bar perpendicular to the bar axis. The strip has a predetermined yield strength (a) sufficient to restrain slab movement in a direction which opens the joint, and (b) yielding in the metal thereof to an extent that will prevent substantial cracking of the slabs. The bar is preferably rectangular and further comprises a resilient facing attached to at least one face to accommodate movement perpendicular to the facing. As preferred, the bar yield strength is sufficient to restrain slab movement at forces between the slabs below 80% of the slab cracking strength, and insufficient to restrain slab movement above at least 80% of the slab cracking strength.Type: GrantFiled: August 28, 1996Date of Patent: February 16, 1999Inventor: Ernest K. Schrader
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Patent number: 5797231Abstract: A concrete dowel slab joint system is provided for maintaining adjacent sections of concrete in alignment during contraction and expansion of the concrete, and for transferring shear stresses and bending moments across a joint formed between adjacent concrete slabs. It includes a sleeve assembly for receiving and maintaining the dowel bar therewithin. In this is way, the dowel bar does not transmit substantial shear stresses to the concrete during the contraction and expansion of the concrete. The sleeve assembly comprises an elongate sleeve body having an outer surface and an inner surface, and defines a hollow interior compartment, (b) at least one closed end, and (c) a sleeve member. Preferably, at least one collapsible spacer member is located within the hollow interior compartment. The spacer member is collapsible by interactive forces exerted by the dowel bar moving in a lateral and/or longitudinal path within the hollow interior compartment in response to the expansion and contraction of the concrete.Type: GrantFiled: June 18, 1996Date of Patent: August 25, 1998Inventor: Donald R. Kramer
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Patent number: 5713174Abstract: A concrete dowel slab joint system for maintaining adjacent sections of concrete in alignment during contraction and expansion of the concrete, and for transferring shear stresses and bending moments across a joint formed between adjacent concrete slabs. It includes a sleeve assembly for receiving and maintaining the dowel bar therewithin. In this is way, the dowel bar does not transmit substantial shear stresses to the concrete during the contraction and expansion of the concrete. The sleeve assembly comprises an elongate sleeve body having an outer surface and an inner surface, and defining a hollow interior compartment, (b) at least one closed end, and (c) at least one collapsible spacer member located within the hollow interior compartment. The collapsible spacer member engages and positions the dowel bar at a lateral distance from the inner surface of the elongate sleeve body and at a longitudinal distance from the closed end.Type: GrantFiled: January 16, 1996Date of Patent: February 3, 1998Inventor: Donald R. Kramer
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Patent number: 5678952Abstract: A concrete dowel placement apparatus comprising a base member and an elongate, tubular dowel receiving sheath which is connectible to the base member. The base member comprises an outer sleeve having first and second ends, and an inner sleeve which is disposed within the outer sleeve. Extending between the inner and outer sleeves is at least one reinforcement wall. Extending about the first end of the outer sleeve is a flange portion which defines a generally flat back surface. The inner sleeve defines an aperture which extends from the second end of the outer sleeve to the back surface of the flange portion, and is sized to accommodate a fastener such as a nail to facilitate the attachment of the base member to a concrete form subsequent to the abutment of the back surface of the flange portion thereagainst.Type: GrantFiled: November 16, 1995Date of Patent: October 21, 1997Inventors: Lee A. Shaw, Ronald D. Shaw
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Patent number: 5586834Abstract: A joint structure for coupling adjacent precast concrete pavement slabs which is excellent in execution process for pavement, particularly is capable of ensuring the sliding of a reinforcing bar. A first horizontal hole for accommodating a reinforcing bar thereinto is provided at an end surface of the first precast concrete pavement slab. A second horizontal hole for inserting a distal end of the reinforcing bar is provided at an end surface of a second precast concrete pavement slab. Both horizontal holes have the same diameters, opposite in position to each other. A guide passage is defined through the second precast concrete pavement slab for its upper surface to communicate with its inner end surface. A hauling member is connected to a distal end of the reinforcing bar so that it may be inserted into the guide passage.Type: GrantFiled: October 11, 1994Date of Patent: December 24, 1996Assignee: Otaru Development and Construction Department of Hokkaido Development BureauInventor: Tomoyuki Tsuji
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Patent number: 4834576Abstract: An expansion joint and form for concrete floors, consisting of a free-standing assembly comprising a vertical asphaltic board, a metallic panel flatly abutting against the asphaltic board, and a number of load transfer dowels or rods slidingly passing horizontally through the board and panels to extend on each slide of the panel and board. The rod partially engages at one end a sleeve and one rod section is covered with grease. After fresh concrete is successively poured on each side of the expansion joint, the concrete will harden unto the board, the panel and the sleeve exclusively of the rod section covered with grease. Hence, the rod will be movable relative to the sleeve and surrounding concrete slab, allowing for relative horizontal displacement of the pair of proximate concrete slabs.Type: GrantFiled: December 24, 1987Date of Patent: May 30, 1989Inventor: Settimio Argento
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Patent number: 4653956Abstract: A highway pavement of concrete slab-on-grade surface includes a prestressed portland cement concrete surface layer which is mounted on a non-freezing low restraint support grade layer without any linear physical connection thereto in such a manner as to permit freedom of movement toward the midpoint of the surface layer. The surface layer is thereby able to slide in response to temperature and moisture changes in the environment including at temperatures below the freezing point of water. The surface layer has a riding surface of generally the same rideability five years after installation as it does at the time of installation.Type: GrantFiled: December 12, 1984Date of Patent: March 31, 1987Inventor: Frederic A. Lang
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Patent number: 4648739Abstract: A non-corrosive load transfer cell assembly for transverse joints in concrete pavement structures including support chairs, a pair of plastic walls abutting the edges of the concrete joints, a drainage trough for continuous drainage flow, a joint forming guide to wet form the upper portion of the joint through the concrete material, and compressed elastomers which space the wall liners apart and cooperate with threaded compression means to provide a load transfer supplement to steel dowels which pass through the elastomers.Type: GrantFiled: March 20, 1985Date of Patent: March 10, 1987Inventor: Bernard D. Thomsen
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Patent number: 4522531Abstract: A transverse concrete pavement joint cell including a pair of plastic walls abutting the edges of the concrete joints. A seamless drainage gutter extends longitudinally between said plastic walls to the edges of the pavement. Blocks of compressible elastomers between said plastic walls absorb expansion of the concrete. The cell includes a base and stabilizing ties secured to a conventional dowel bar assembly.Type: GrantFiled: May 18, 1983Date of Patent: June 11, 1985Inventors: Bernard D. Thomsen, Kenneth L. Thomsen
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Patent number: 3972640Abstract: A highway joint system, and the method of forming the same, wherein bars are employed between adjacent concrete highway sections having obliquely disposed end joints imposing a biasing force upon the sections during the occurrence of section lateral displacement due to expansion. The joint system utilizes biasing bars which may employ torsion forces for realigning the highway sections after expansion thereof, and the system contemplates the utilization of a tongue and groove interconnection in conjunction with the bars to prevent "buckling" and other misalignment at concrete highway joints. A V-shaped divider plate is employed to define the tongue and groove relationship, and this plate supports the biasing bars, and is supported by a framework capable of releasable attachment to the bars.Type: GrantFiled: September 16, 1974Date of Patent: August 3, 1976Inventor: Raphael W. Miller