US3488907A - Rust protection and distance device for reinforcing rod chairs - Google Patents

Rust protection and distance device for reinforcing rod chairs Download PDF

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Publication number
US3488907A
US3488907A US690450A US3488907DA US3488907A US 3488907 A US3488907 A US 3488907A US 690450 A US690450 A US 690450A US 3488907D A US3488907D A US 3488907DA US 3488907 A US3488907 A US 3488907A
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US
United States
Prior art keywords
sleeve
concrete
distance
rust
rust protection
Prior art date
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
US690450A
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English (en)
Inventor
Anders Bertil Aberg
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Individual
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Individual
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Filing date
Publication date
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Publication of US3488907A publication Critical patent/US3488907A/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
    • E04C5/20—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups of material other than metal or with only additional metal parts, e.g. concrete or plastics spacers with metal binding wires
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
    • E04C5/161—Protective caps for the ends of reinforcing bars
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
    • E04C5/18—Spacers of metal or substantially of metal

Definitions

  • the device which according to the disclosure is made from plastics such as, polyethylenes, polypropylenes, polyvinylchlorides and polyamides constitutes a socket to be applied to the ends of the chair feet, the socket comprising a sleeve which is open at one end and closed at the other by a bottom portion.
  • the cavity of the sleeve has adjacent the bottom, a smaller cross section than the cross section of remaining portions of the cavity nearer to said open end.
  • the sleeve has at least two mutually remote distance means protruding radially from the outer surface of the sleeve in at least one common direction radially of the sleeve.
  • the invention relates to an improved rust protection and distance device, in particular for concrete reinforcements.
  • the purpose of such distance devices is to maintain horizontally disposed reinforcing rods at a predetermined distance from the form when pouring floors, slabs or the like, and a rust protection and distance socket constituting part of such distance device.
  • a rust protection and distance device of the kind described is substantially characterized by the fact that said device comprises a sleeve which is open at one end and closed at the other by a bottom portion, the cavity of the sleeve having adjacent the bottom a smaller cross section than the cross section of remaining portions of the cavity nearer to said open end, said sleeve having at least two mutually remote distance means protruding radially from the outer surface 3,488,907 Patented Jan. 13, 197( thereof in at least one common direction radially of thl sleeve axis.
  • Plastic materials suitable for the purpose are, by wet: of example, polyethylenes, polypropylenes, polyvinyl chlorides, polyamides.
  • FIG. 1 is a side view of an embodiment of my invention and constituting a socket to be applied to the end of a round-iron rod bent to constitute a chair for a reinforcement rod, for instance,
  • the rust protection and distance device comprises a frusto-conical sleeve 1, the wider end of which is open and the smaller end of which is closed by a bottom 2, the device constituting a socket to be placed over the end of a rod of appropriate dimension.
  • the slope of the walls of the sleeve can be rather small and need not be as large as illustrated in FIGS. 1 and 3 for illustrative purpose. With slope of the walls toward the axis of the sleeve as small as 0.2, corresponding to a difference in diameter of about 0.5 mm.
  • the sleeve will be easily applicable to the end of a rod of appropriate dimension to be held thereon by coaction between the walls of the sleeve and the rods adjacent the closed ends of the sleeve.
  • Chairs of this kind for reinforcement irons or other bar-shaped components to be enclosed by the poured concrete are usually made from round-iron having a diameter of between 4 and 10 mm.
  • a number of distance means extend radially of the external surface of the sleeve. As illustrated in FIGS. 1 and 2, said distance means constitute annuluses 3, extending radially in the peripheral direction of the sleeve. Said rings protrude a distance of at least 0.5 and preferably 1-3 mm. and more from the external surface 4 of the sleeve.
  • said rings as well constitute means for preventing humidity from migrating along the sleeves toward the reinforcement iron through the concrete along the legs of the chair.
  • 3 lhe round-iron piece 5 is bent to a shape so as to convute a chair having two legs 6 and an intermediary vered portion 7 to support a reinforcement rod, the legs ling ends 8 which are bent out laterally and in opposite ections so as to define a support area of the chair on the Wild.
  • the ends 8 have a tight fit in the sleeve at and acent the bottom 2 thereof, so that the sleeve is sefely held onto the chair.
  • FIG. 3 shows a modification of the protecting means lstrated in FIG. 1.
  • distance memrs 11 extend radially of the sleeve only along one side reof.
  • the protection against creep humidity along the external wall of the sleeve is less .cient than with the embodiment according to FIG.
  • the cavity of a sleeve has a cylindrical shape and has a constriction iacent the bottom 2 constituted by a rounded cam 12 to ld the protection device attached to the round-iron and one of the annuluses lateral holes 13 for nails to temrarily hold the chair attached to a form before and ring pouring, the nails being removed after removal of a form by pulling them out of the plastic socket.
  • this invention has been described with respect to :cific examples thereof, it should not be construed as ing limited thereto. Various modifications and substituns will be obvious to everyone skilled in the art and 1 be made without departing from the scope of this Iention.
  • a chair for supporting reinforcing bars above the bstantially horizontal surface of a form comprising a rod :rnent formed into an inverted U-shaped structure havg a saddle for supporting a reinforcing bar, two bent mgate foot portions laterally spaced from each other id extending horizontally away from the plane of the U- aped portion of said structure in opposite directions and apted to overlie said form surface, and a rust protector r each foot portion comprising an integral molded prodt made of a synthetic resin having a body portion in the .4 form of an elongate hollow sleeve which is closed at one end, and a plurality of projections extending downwardly from the outer surface of said body portion for spacing said body portion above said horizontal form surface, the interior surface of said sleeve being shaped to provide a gripping engagement with said elongate foot portion at a point remote from the open end of said sleeve, said open end being of a diameter sufiicient
  • a rust protector as claimed in claim 1 in which said interior surface is tapered.
  • a rust protector as claimed in claim 1 in which said interior surface is provided with an annular constricted portion located close to said closed end but spaced therefrom.
  • a rust protector as claimed in claim 1 in which said projections are in the form of annular flanges surrounding said body portion.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
  • Moulds, Cores, Or Mandrels (AREA)
US690450A 1966-12-16 1967-12-14 Rust protection and distance device for reinforcing rod chairs Expired - Lifetime US3488907A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE17311/66A SE321334B (index.php) 1966-12-16 1966-12-16

Publications (1)

Publication Number Publication Date
US3488907A true US3488907A (en) 1970-01-13

Family

ID=20303494

Family Applications (1)

Application Number Title Priority Date Filing Date
US690450A Expired - Lifetime US3488907A (en) 1966-12-16 1967-12-14 Rust protection and distance device for reinforcing rod chairs

Country Status (5)

Country Link
US (1) US3488907A (index.php)
DE (1) DE1659020A1 (index.php)
FR (1) FR1547999A (index.php)
GB (1) GB1206189A (index.php)
SE (1) SE321334B (index.php)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3839838A (en) * 1972-04-04 1974-10-08 S Vigh Bolster chair
US4080770A (en) * 1974-08-06 1978-03-28 Sandor Vigh High chair spacer
US5363618A (en) * 1990-03-22 1994-11-15 Underwood Daniel C Construction site safety
US7509783B1 (en) * 2005-07-01 2009-03-31 Thomas Matousek Reinforcing rod
US20190277031A1 (en) * 2016-11-03 2019-09-12 Midland Steel Reinforcement Supplies Ltd. Reinforcing framework and slab design

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10213456A1 (de) * 2002-03-26 2003-10-16 Exte Extrudertechnik Gmbh Unterstützungsteil zur Lagesicherung eines Bewehrungselements
GB2464220B (en) * 2009-12-11 2010-08-25 Martin Ansell An arrangement including concrete reinforcement bars and a safety device

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2305979A (en) * 1940-08-03 1942-12-22 Robert E Mitchell Compressible cap for dowel bars
CH338587A (de) * 1955-11-23 1959-05-31 Gartenmann & Cie Ag C Abstandhalter für einzubetonierende Bewehrungsstäbe
US3132448A (en) * 1958-05-08 1964-05-12 Colorado Builders Supply Co Chair for concrete reinforcing rods
GB963741A (en) * 1959-10-15 1964-07-15 Anders Bertil Aberg Improvements relating to protection caps for the ends of elongated articles
US3289378A (en) * 1964-02-10 1966-12-06 Carroll William Jay Reinforcing rod support
US3348347A (en) * 1963-11-21 1967-10-24 Berry Ferdinand William Synthetic plastic spacer for concrete reinforcements

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2305979A (en) * 1940-08-03 1942-12-22 Robert E Mitchell Compressible cap for dowel bars
CH338587A (de) * 1955-11-23 1959-05-31 Gartenmann & Cie Ag C Abstandhalter für einzubetonierende Bewehrungsstäbe
US3132448A (en) * 1958-05-08 1964-05-12 Colorado Builders Supply Co Chair for concrete reinforcing rods
GB963741A (en) * 1959-10-15 1964-07-15 Anders Bertil Aberg Improvements relating to protection caps for the ends of elongated articles
US3348347A (en) * 1963-11-21 1967-10-24 Berry Ferdinand William Synthetic plastic spacer for concrete reinforcements
US3289378A (en) * 1964-02-10 1966-12-06 Carroll William Jay Reinforcing rod support

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3839838A (en) * 1972-04-04 1974-10-08 S Vigh Bolster chair
US4080770A (en) * 1974-08-06 1978-03-28 Sandor Vigh High chair spacer
US5363618A (en) * 1990-03-22 1994-11-15 Underwood Daniel C Construction site safety
US7509783B1 (en) * 2005-07-01 2009-03-31 Thomas Matousek Reinforcing rod
US20190277031A1 (en) * 2016-11-03 2019-09-12 Midland Steel Reinforcement Supplies Ltd. Reinforcing framework and slab design

Also Published As

Publication number Publication date
FR1547999A (fr) 1968-11-29
GB1206189A (en) 1970-09-23
DE1659020A1 (de) 1970-12-10
SE321334B (index.php) 1970-03-02

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