WO2005021881A2 - W foot anchor - Google Patents
W foot anchor Download PDFInfo
- Publication number
- WO2005021881A2 WO2005021881A2 PCT/US2004/027889 US2004027889W WO2005021881A2 WO 2005021881 A2 WO2005021881 A2 WO 2005021881A2 US 2004027889 W US2004027889 W US 2004027889W WO 2005021881 A2 WO2005021881 A2 WO 2005021881A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- bar
- protruding curved
- curved section
- section
- anchor
- Prior art date
Links
Classifications
-
- 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 frontwardly protruding curved section and a rearwardly protruding curved section.
- 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 lower end of the bar may include at least two curved protrusions, including a frontwardly protruding curved section and a rearwardly protruding curved section.
- the bottom of the bar may include a first upwardly projecting face, a bottom platform section and a second upwardly projecting face.
- 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. Anchors of increasing thickness allow for a greater weight capacity to be achieved.
- 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 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 a first upwardly projecting face 42, a bottom platform section 44 and a second upwardly projecting face 46.
- the lower end 18 of the bar 12 comprises a frontwardly protruding curved section 48 and a rearwardly protruding curved section 50.
- the frontwardly protruding curved section 48 and the rearwardly protruding curved section 50 together define a wave profile that is generally S-shaped when viewed from the side, especially the second side 25, as best illustrated , in FIG. 3.
- the frontwardly protruding curved section 48 defines a first radius of curvature
- the rearwardly protruding curved section 50 defines a second radius of curvature.
- the second radius of curvature of the illustrated embodiment is substantially the same as the first radius of curvature.
- the bar 12 further defines a width W and a thickness T, and the protruding curved sections 48, 50 have substantially the same width and thickness as that of the bar 12.
- the protruding curved sections 48, 50 act to provide additional shear resistance between the anchor 10 and the concrete member in which the anchor 10 is embedded.
- the protruding curved sections 48, 50 create a shearcone in the concrete on both sides of the anchor, allowing the concrete anchor to be used to lift concrete forms, such as precast walls, of great weight.
- the design of the protruding curved sections 48, 50 allow for them to be stamped on the bar in one operation.
- the frontwardly protruding curved section 48 is positioned above the rearwardly protruding curved section 50 in the illustrated embodiment.
- the frontwardly protruding curved section 48 can instead be positioned below the rearwardly protruding curved section 50 without departing from the spirit and scope of the present invention.
- the protruding curved sections 48, 50 can instead each have a generally V-shaped cross-section, U-shaped cross-section, or the like.
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
- Ladders (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/648,935 | 2003-08-27 | ||
US10/648,935 US20050055958A1 (en) | 2003-08-27 | 2003-08-27 | W foot anchor |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2005021881A2 true WO2005021881A2 (en) | 2005-03-10 |
WO2005021881A3 WO2005021881A3 (en) | 2005-06-23 |
Family
ID=34273330
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2004/027889 WO2005021881A2 (en) | 2003-08-27 | 2004-08-27 | W foot anchor |
Country Status (2)
Country | Link |
---|---|
US (1) | US20050055958A1 (en) |
WO (1) | WO2005021881A2 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20060248811A1 (en) * | 2005-05-04 | 2006-11-09 | Universal Form Clamp Co., Inc. | Anchor positioning assembly |
CN101605953B (en) | 2006-12-22 | 2013-07-10 | 马塞勒·阿尔提翁 | Anchor for handling building elements, in particular a concrete panel |
EP2088112A1 (en) * | 2008-02-08 | 2009-08-12 | Marcel Arteon | Anchor for supporting construction elements on supported diverging branches |
US10066406B2 (en) * | 2016-08-25 | 2018-09-04 | Midwest Concrete & Masonry Supply, Inc. | Erection anchor for precast insulated concrete wall panels |
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US6729079B2 (en) * | 2001-07-26 | 2004-05-04 | Dayton Superior Corporation | Concrete anchor |
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-
2003
- 2003-08-27 US US10/648,935 patent/US20050055958A1/en not_active Abandoned
-
2004
- 2004-08-27 WO PCT/US2004/027889 patent/WO2005021881A2/en active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2984195A (en) * | 1958-06-19 | 1961-05-16 | Harbison Walker Refractories | Reinforced refractory brick |
US4655015A (en) * | 1983-04-07 | 1987-04-07 | Firma Pfeifer Seil-Und Hebetechnik Gmbh & Co. | Anchor tie for carrying prefabricated concrete members |
US6729079B2 (en) * | 2001-07-26 | 2004-05-04 | Dayton Superior Corporation | Concrete anchor |
Also Published As
Publication number | Publication date |
---|---|
US20050055958A1 (en) | 2005-03-17 |
WO2005021881A3 (en) | 2005-06-23 |
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