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US20050044811A1 - Ring lift anchor - Google Patents

Ring lift anchor Download PDF

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Publication number
US20050044811A1
US20050044811A1 US10/649,458 US64945803A US2005044811A1 US 20050044811 A1 US20050044811 A1 US 20050044811A1 US 64945803 A US64945803 A US 64945803A US 2005044811 A1 US2005044811 A1 US 2005044811A1
Authority
US
United States
Prior art keywords
bar
anchor
face
concrete anchor
concrete
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.)
Abandoned
Application number
US10/649,458
Inventor
Rens Hansort
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.)
UNIVERSAL FORM CLAMP Inc
Universal Form Clamp Co Inc
Original Assignee
Universal Form Clamp Co Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Universal Form Clamp Co Inc filed Critical Universal Form Clamp Co Inc
Priority to US10/649,458 priority Critical patent/US20050044811A1/en
Assigned to UNIVERSAL FORM CLAMP CO., INC. reassignment UNIVERSAL FORM CLAMP CO., INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HANSORT, RENS
Priority to PCT/US2004/028119 priority patent/WO2005021875A2/en
Publication of US20050044811A1 publication Critical patent/US20050044811A1/en
Assigned to UNIVERSAL FORM CLAMP OF CHICAGO, INC. reassignment UNIVERSAL FORM CLAMP OF CHICAGO, INC. CORRECTIVE ASSIGNMENT TO CORRECT THE ASSIGNEE'S NAME PREVIOUSLY RECORDED ON REEL 014769 FRAME 0324. ASSIGNOR(S) HEREBY CONFIRMS THE CORRECTIVE ASSIGNMENT TO CORRECT NAME OF ASSIGNEE FROM UNIVERSAL FORM CLAMP CO., INC. TO UNIVERSAL FORM CLAMP OF CHICAGO, INC.. Assignors: HANSORT, RENS
Assigned to UNIVERSAL FORM CLAMP, INC. reassignment UNIVERSAL FORM CLAMP, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: UNIVERSAL FORM CLAMP OF CHICAGO, INC.
Assigned to UNIVERSAL FORM CLAMP, INC. reassignment UNIVERSAL FORM CLAMP, INC. CORRECTIVE ASSIGNMENT TO CORRECT THE UNIVERSIAL FORM CLAMP, INC. IS A DELAWARE CORPORATION, NOT AN LLC PREVIOUSLY RECORDED ON REEL 017586 FRAME 0703. ASSIGNOR(S) HEREBY CONFIRMS THE UNIVERSAL FORM CLAMP, INC. WAS INCORRECTLY STATED TO BE A DELAWARE LLC. Assignors: UNIVERSAL FORM CLAMP OF CHICAGO, INC.
Abandoned legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/38—Connections for building structures in general
    • E04B1/41—Connecting devices specially adapted for embedding in concrete or masonry
    • 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
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/14—Conveying or assembling building elements
    • E04G21/142—Means in or on the elements for connecting same to handling apparatus

Definitions

  • the present invention relates towards an erection lift anchor assembly for embedment in a concrete member, such as a precast or tilt-up wall.
  • the erection anchor of the present invention allows for concrete members, such as walls, to be positioned by the use of standard lifting equipment (cranes with cable attachments, etc.) by connecting lifting attachments to the erection lift anchor which is embedded in a concrete member.
  • the present invention is directed towards a lifting anchor for embedment in a concrete member.
  • the anchor comprises a flat bar having a top and bottom; an upper and lower end; a front and rear face and a first and second side.
  • the bar has a first aperture positioned for insertion of a locking device that can be attached to a shackle for lifting the concrete wall or element containing the anchor.
  • the bar may have additional apertures for insertion of reinforcing bars.
  • the bar may further include a an upwardly curved face adjacent the bottom of the bar, and a conical foot shaped to fit adjacent the upwardly curved face.
  • the anchor comprises a bar having a top and bottom; an upper and lower end; a front and rear face and a first and second side.
  • the top of the bar may include a first apex section, a first upwardly projecting face, a top platform section, a second upwardly projecting face, and a second apex section.
  • the bar has at least one aperture near the upper end of the bar.
  • the bar may contain additional apertures.
  • the bottom of the bar may include an upwardly curved face shaped to engage an upper portion of a conical foot.
  • the top of the bar is positioned adjacent the face of the concrete form.
  • a void former suitably made from rubber, is placed around the anchor and covers a portion of the anchor, including the first aperture in the upper end of the anchor.
  • the area covered by the void former stays free of concrete, while the rest of the anchor, including the any additional apertures, are encompassed by the concrete.
  • the void former is removed and a void recess is formed around a portion of the anchor, allowing lifting hardware to be attached to the anchor, via the aperture in the upper end of the anchor. This allows for a lifting attachment to be suitably connected to the concrete anchor.
  • FIG. 1 shows a top view of one embodiment of the concrete lift anchor of the present invention.
  • FIG. 2 shows a front view of one embodiment of the concrete lift anchor of the present invention.
  • FIG. 3 shows a side view of one embodiment of the concrete lift anchor of the present invention.
  • FIG. 4 shows a perspective view of one embodiment of the concrete lift anchor of the present invention.
  • the present invention is directed towards a concrete lift anchor.
  • the concrete anchor is suitably made from steel.
  • the anchor is suitably a unitary piece made by a drop forging procedure. This allows the anchor to be produced in one operation, and allows the anchor to be produced out of a higher strength material, suitably 100,000 psi steel, without additional heat treatments. By using 100,000 psi steel the safe working load of the anchor is increased 25% over anchors made from 75,000 psi steel.
  • the anchor 10 comprises a flat bar 12 , preferably made of steel, which has a top 14 and bottom 16 ; an upper 18 and lower end 20 ; a front 22 and rear face 24 and a first 23 and second 25 side.
  • the bar 12 has a generally constant width W and thickness T.
  • the top 14 of the bar 12 has a first apex section 26 , a first upwardly projecting face 28 , a top platform section 30 , a second upwardly projecting face 32 , and a second apex section 34 .
  • the bar 12 also has a first aperture 36 near the upper end 18 of the bar.
  • the first apex section 26 , first upwardly projecting face 28 , top platform section 30 , second upwardly projecting face 32 , second apex section 34 and first aperture 36 define an attachment region of the anchor 10 adapted to engage a lifting mechanism. That is, the design of the first apex section 26 , first upwardly projecting face 28 , top platform section 30 , second upwardly projecting face 32 , second apex section 34 and first aperture 36 allows for the secure attachment of a lifting mechanism for moving and positioning a concrete form in which the concrete anchor 10 is embedded.
  • the lifting attachment (such as a hook or other suitable attachment) is suitably connected to the concrete anchor 10 via the first aperture 36 .
  • the bar 12 has a second aperture 38 positioned beneath the first aperture 36 . The second aperture 38 allows for the insertion of a reinforcing bar.
  • the bottom 16 of the bar 10 has an upwardly curved face 40 shaped to engage a conical foot 42 .
  • the upwardly curved face 40 has a maximum point located centrally and symmetrically between the first 23 and second 25 sides of the bar 12 .
  • the conical foot 42 has a circular base 44 and a modified upper end 46 dimensioned to fit adjacent the upwardly curved face 40 of the bar 12 .
  • the circular base 44 has a diameter greater than the width W and thickness T of the bar 12 , such that when the bar 12 is engaged with the conical foot 42 and positioned centrally with respect to the conical foot 42 , all faces and sides of the bar 12 fit within the circumference of the circular base 44 , as best illustrated in FIG. 1 .
  • the conical foot 42 acts to provide shear resistance between the anchor 10 and the concrete member in which the anchor 10 is embedded when the concrete member is being lifted by the anchor 10 .
  • the conical foot 42 of the anchor 10 allows for the development of a large shearcone when the anchor 10 is used to lift the concrete form it is embedded in.
  • the bottom 16 of the bar 12 can be secured to the conical foot 42 via a variety of fasteners or adhesives well-known in the art (e.g., screws, bolts, nails, cement, glue, welding, or combinations thereof), or the conical foot 42 can be integrally formed with the bar 12 .

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Joining Of Building Structures In Genera (AREA)
  • Conveying And Assembling Of Building Elements In Situ (AREA)

Abstract

The present invention is directed towards a lifting anchor for embedment in a concrete member. The anchor comprises a flat bar having a top and bottom; an upper and lower end; and a front and rear face. The bar has a first aperture positioned for insertion of a locking device that can be attached to a shackle for lifting the concrete wall or element containing the anchor. The bar may have additional apertures for insertion of reinforcing bars. The bar may further include an upwardly curved face adjacent the bottom of the bar, and a conical foot shaped to fit adjacent the upwardly curved face.

Description

  • The present invention relates towards an erection lift anchor assembly for embedment in a concrete member, such as a precast or tilt-up wall. The erection anchor of the present invention allows for concrete members, such as walls, to be positioned by the use of standard lifting equipment (cranes with cable attachments, etc.) by connecting lifting attachments to the erection lift anchor which is embedded in a concrete member.
    • SUMMARY OF INVENTION
  • The present invention is directed towards a lifting anchor for embedment in a concrete member. The anchor comprises a flat bar having a top and bottom; an upper and lower end; a front and rear face and a first and second side. The bar has a first aperture positioned for insertion of a locking device that can be attached to a shackle for lifting the concrete wall or element containing the anchor. The bar may have additional apertures for insertion of reinforcing bars. The bar may further include a an upwardly curved face adjacent the bottom of the bar, and a conical foot shaped to fit adjacent the upwardly curved face.
  • In one embodiment of the invention, the anchor comprises a bar having a top and bottom; an upper and lower end; a front and rear face and a first and second side. The top of the bar may include a first apex section, a first upwardly projecting face, a top platform section, a second upwardly projecting face, and a second apex section. The bar has at least one aperture near the upper end of the bar. The bar may contain additional apertures. The bottom of the bar may include an upwardly curved face shaped to engage an upper portion of a conical foot.
  • When the anchor of the present invention is embedded in a concrete form, the top of the bar is positioned adjacent the face of the concrete form. A void former, suitably made from rubber, is placed around the anchor and covers a portion of the anchor, including the first aperture in the upper end of the anchor. When the concrete is poured around the anchor, the area covered by the void former stays free of concrete, while the rest of the anchor, including the any additional apertures, are encompassed by the concrete. When the concrete form is hardened, the void former is removed and a void recess is formed around a portion of the anchor, allowing lifting hardware to be attached to the anchor, via the aperture in the upper end of the anchor. This allows for a lifting attachment to be suitably connected to the concrete anchor.
  • Other features and aspects of the invention will become apparent to those skilled in the art upon review of the following detailed description, drawings, and exhibits.
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • FIG. 1 shows a top view of one embodiment of the concrete lift anchor of the present invention.
  • FIG. 2 shows a front view of one embodiment of the concrete lift anchor of the present invention.
  • FIG. 3 shows a side view of one embodiment of the concrete lift anchor of the present invention.
  • FIG. 4 shows a perspective view of one embodiment of the concrete lift anchor of the present invention.
  • Before one embodiment of the present invention is explained in detail, it is to be understood that the present invention is not limited in its application to the details of construction and the arrangements of the components set forth in the following description or illustrated in the drawings. The present invention is capable of other embodiments and of being practiced or being carried out in various ways. In addition, it is understood that the phraseology and terminology used herein are for the purpose of description and should not be regarded as limiting. The use of “including”, “comprising”, “having” and “has” and variations thereof herein is meant to encompass the items listed thereafter and equivalents thereof as well as additional items and equivalents thereof.
    • DETAILED DESCRIPTION
  • The present invention is directed towards a concrete lift anchor. The concrete anchor is suitably made from steel. The anchor is suitably a unitary piece made by a drop forging procedure. This allows the anchor to be produced in one operation, and allows the anchor to be produced out of a higher strength material, suitably 100,000 psi steel, without additional heat treatments. By using 100,000 psi steel the safe working load of the anchor is increased 25% over anchors made from 75,000 psi steel.
  • One exemplary embodiment of the concrete anchor of the present invention is shown in FIGS. 1-4. The anchor 10 comprises a flat bar 12, preferably made of steel, which has a top 14 and bottom 16; an upper 18 and lower end 20; a front 22 and rear face 24 and a first 23 and second 25 side. The bar 12 has a generally constant width W and thickness T. The top 14 of the bar 12 has a first apex section 26, a first upwardly projecting face 28, a top platform section 30, a second upwardly projecting face 32, and a second apex section 34. The bar 12 also has a first aperture 36 near the upper end 18 of the bar. The first apex section 26, first upwardly projecting face 28, top platform section 30, second upwardly projecting face 32, second apex section 34 and first aperture 36 define an attachment region of the anchor 10 adapted to engage a lifting mechanism. That is, the design of the first apex section 26, first upwardly projecting face 28, top platform section 30, second upwardly projecting face 32, second apex section 34 and first aperture 36 allows for the secure attachment of a lifting mechanism for moving and positioning a concrete form in which the concrete anchor 10 is embedded. The lifting attachment (such as a hook or other suitable attachment) is suitably connected to the concrete anchor 10 via the first aperture 36. The bar 12 has a second aperture 38 positioned beneath the first aperture 36. The second aperture 38 allows for the insertion of a reinforcing bar.
  • The bottom 16 of the bar 10 has an upwardly curved face 40 shaped to engage a conical foot 42. The upwardly curved face 40 has a maximum point located centrally and symmetrically between the first 23 and second 25 sides of the bar 12. The conical foot 42 has a circular base 44 and a modified upper end 46 dimensioned to fit adjacent the upwardly curved face 40 of the bar 12. The circular base 44 has a diameter greater than the width W and thickness T of the bar 12, such that when the bar 12 is engaged with the conical foot 42 and positioned centrally with respect to the conical foot 42, all faces and sides of the bar 12 fit within the circumference of the circular base 44, as best illustrated in FIG. 1. The conical foot 42 acts to provide shear resistance between the anchor 10 and the concrete member in which the anchor 10 is embedded when the concrete member is being lifted by the anchor 10. The conical foot 42 of the anchor 10 allows for the development of a large shearcone when the anchor 10 is used to lift the concrete form it is embedded in. It will be readily apparent to those of ordinary skill in the art that the bottom 16 of the bar 12 can be secured to the conical foot 42 via a variety of fasteners or adhesives well-known in the art (e.g., screws, bolts, nails, cement, glue, welding, or combinations thereof), or the conical foot 42 can be integrally formed with the bar 12.
  • Variations and modifications of the foregoing are within the scope of the present invention. It is understood that the invention disclosed and defined herein extends to all alternative combinations of two or more of the individual features mentioned or evident from the text and/or drawings. All of these different combinations constitute various alternative aspects of the present invention. The embodiments described herein explain the best modes known for practicing the invention and will enable others skilled in the art to utilize the invention.

Claims (15)

1. A concrete anchor comprising:
a bar having a top, a bottom, an upper end, a lower end, a first side, a second side, a front face, a rear face, a first aperture, and an upwardly curved face adjacent the bottom of the bar; and
a conical foot shaped to fit adjacent the upwardly curved face.
2. The concrete anchor of claim 1 wherein the bar further comprises a second aperture.
3. The concrete anchor of claim 1 wherein the top of the bar further comprises a first apex section, a first upwardly projecting face, a top platform section, a second upwardly projecting face, and a second apex section.
4. The concrete anchor of claim 3 wherein the first apex section, the first upwardly projecting face, the top platform section, the second upwardly projecting face, the second apex section, and the first aperture define an attachment region of the anchor.
5. The concrete anchor of claim 1 wherein the upwardly curved face has a maximum point located centrally between the first and second sides of the bar.
6. The concrete anchor of claim 1 wherein the conical foot is integrally formed with the bar.
7. The concrete anchor of claim 1 wherein the conical foot at least partially defines a substantially shear-resistant region of the anchor.
8. The concrete anchor of claim 1 wherein the bar defines a width and a thickness, and wherein the conical foot comprises a circular base having a diameter greater than the width and the thickness of the bar.
9. The concrete anchor of claim 8 wherein the circular base defines a circumference, and wherein the bar is positioned centrally with respect to the circular base of the conical foot such that the bar fits within the circumference of the circular base.
10. A concrete anchor comprising:
a bar having a top, a bottom, an upper end, a lower end, a first side, a second side, a front face, a rear face, a first aperture positioned adjacent the upper end of the bar, an upwardly curved face adjacent the bottom of the bar;
a conical foot shaped to engage the upwardly curved face; and
wherein the top of the bar further comprises a first apex section, a first upwardly projecting face, a top platform section, a second upwardly projecting face, and a second apex section.
11. The concrete anchor of claim 10 wherein the upwardly curved face has a maximum point located centrally between the first and second sides of the bar.
12. The concrete anchor of claim 10 wherein the bar further comprises a second aperture.
13. The concrete anchor of claim 10 wherein the top of the bar and the first aperture define an attachment region of the anchor.
14. The concrete anchor of claim 10 wherein the conical foot at least partially defines a shear-resistant region of the anchor.
15. The concrete anchor of claim 10 wherein the bar defines a width and a thickness, and wherein the conical foot comprises a circular base having a diameter greater than the width and the thickness of the bar.
US10/649,458 2003-08-27 2003-08-27 Ring lift anchor Abandoned US20050044811A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US10/649,458 US20050044811A1 (en) 2003-08-27 2003-08-27 Ring lift anchor
PCT/US2004/028119 WO2005021875A2 (en) 2003-08-27 2004-08-27 Ring lift anchor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US10/649,458 US20050044811A1 (en) 2003-08-27 2003-08-27 Ring lift anchor

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US29/255,659 Continuation USD547524S1 (en) 2003-08-27 2006-03-10 Ring lift anchor

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US20050044811A1 true US20050044811A1 (en) 2005-03-03

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US10/649,458 Abandoned US20050044811A1 (en) 2003-08-27 2003-08-27 Ring lift anchor

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WO (1) WO2005021875A2 (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090107057A1 (en) * 2005-05-04 2009-04-30 Rens Hansort Anchor positioning assembly
US10190315B2 (en) * 2016-08-09 2019-01-29 Dennis Moore Rebar construction and transportation system
EP3441542A1 (en) 2017-08-10 2019-02-13 ALP Supply, Inc. Lift anchor for precast concrete component
US11421431B1 (en) 2019-02-21 2022-08-23 ALP Supply, Inc. Erection anchor with coil legs
USD1009583S1 (en) * 2022-06-06 2024-01-02 ALP Supply, Inc. Fish tail lift anchor for precast concrete
USD1010160S1 (en) * 2021-07-14 2024-01-02 Illinois Tool Works Inc. Anchor
USD1022259S1 (en) * 2021-06-07 2024-04-09 Illinois Tool Works Inc. Anchor
US12060721B2 (en) 2021-07-14 2024-08-13 Illinois Tool Works Inc. Anchor
EP4417769A1 (en) * 2023-02-14 2024-08-21 ALP Supply, Inc. Anchors for precast concrete and precast concrete having anchors

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US20090107057A1 (en) * 2005-05-04 2009-04-30 Rens Hansort Anchor positioning assembly
US10190315B2 (en) * 2016-08-09 2019-01-29 Dennis Moore Rebar construction and transportation system
EP3441542A1 (en) 2017-08-10 2019-02-13 ALP Supply, Inc. Lift anchor for precast concrete component
US11549273B2 (en) 2017-08-10 2023-01-10 ALP Supply, Inc. Lift anchor for precast concrete component
US11421431B1 (en) 2019-02-21 2022-08-23 ALP Supply, Inc. Erection anchor with coil legs
USD1022259S1 (en) * 2021-06-07 2024-04-09 Illinois Tool Works Inc. Anchor
USD1010160S1 (en) * 2021-07-14 2024-01-02 Illinois Tool Works Inc. Anchor
US12060721B2 (en) 2021-07-14 2024-08-13 Illinois Tool Works Inc. Anchor
USD1009583S1 (en) * 2022-06-06 2024-01-02 ALP Supply, Inc. Fish tail lift anchor for precast concrete
EP4417769A1 (en) * 2023-02-14 2024-08-21 ALP Supply, Inc. Anchors for precast concrete and precast concrete having anchors

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