Patent US3873147A successfully refreshed from Google Patents.
US3873147A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lift connector for precast members
Assignee: Individual
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Filing: 1973-11-23
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Granted: 1975-03-25
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Expires: 1993-11-23
Abstract
Abstract A connector for precast members comprising a hollow housing having at least one side wall, a closed end, and an open end. A removable plug is retained in the open end of the housing. An aperture is provided in the side wall of the housing and has at least an aperture side wall. Retention means are located in the aperture side wall and adapted to retain a rod or cable extending in the aperture and externally of the housing. The retention means formed in the aperture side wall also provides engageable abutment means internally of the housing whereby to engage with a lifting device.
Inventors
- 👤 Thomas Michael Annable
- 👤 Gerhard Heieis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:12
CPC Classifications
B; B66; B66C; B66C1/00; B66C1/10; B66C1/62; B66C1/66; B66C1/666
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
213 words
A connector for precast members and engageable by a lifting device having an elongated rectangular hook member having a hook cavity in a side wall thereof defining a hook section thereunder, and a spacer member slidingly retained on a further side wall of said hook member opposite said hook cavity, said connector comprising a hollow housing having opposed parallel side walls, a closed end and an open end, said connector being adapted for securement to a form wall, a groove extending transversely between a pair of said opposed parallel side walls and defining a mouth opening extending across one of said side walls, said groove having a rod retention end, a lip extending from an edge of said groove adjacent said rod retention end, said lip extending parallel to the longitudinal axis of said groove and internally of said groove to frictionally retain and position a portion of a reinforcing rod extending across said retention end and projecting within a form in which concrete is to be poured, an engageable abutment cavity formed internally of said housing between said groove and said closed end, said hook section of said hook member being positioned in said engageable abutment cavity and being prevented from moving out from under said engageable abutment by said spacer member.
Claim 2
Dependent Claim
213 words
A connector for precast members and engageable by a lifting device having an elongated rectangular hook member having a hook cavity in a side wall thereof defining a hook section thereunder, and a spacer member slidingly retained on a further side wall of said hook member opposite said hook cavity, said connector comprising a hollow housing having opposed parallel side walls, a closed end and an open end, said connector being adapted for securement to a form wall, a groove extending transversely between a pair of said opposed parallel side walls and defining a mouth opening extending across one of said side walls, said groove having a rod retention end, a lip extending from an edge of said groove adjacent said rod retention end, said lip extending parallel to the longitudinal axis of said groove and internally of said groove to frictionally retain and position a portion of a reinforcing rod extending across said retention end and projecting within a form in which concrete is to be poured, an engageable abutment cavity formed internally of said housing between said groove and said closed end, said hook section of said hook member being positioned in said engageable abutment cavity and being prevented from moving out from under said engageable abutment by said spacer member.
Claim 3
Dependent Claim
26 words
A connector as claimed in claim 1 wherein said retention end is arcuate, said lip being located above the central horizontal plane of said arcuate shape.
Claim 4
Dependent Claim
17 words
A connector as claimed in claim 1 wherein a removable plug is retained in said open end.
Claim 5
Dependent Claim
53 words
A connector as claimed in claim 3 wherein said removable plug has a flat outer face, a hole in said face extending through said plug to detachably secure a rod thereto to hold said housing in a precast form and to remove said plug from said housing when retained in a precast member.
Claim 6
Dependent Claim
52 words
A connector as claimed in claim 4 wherein said housing is molded from plastic material, said closed end being a cap detachably secured to said housing, said plug being formed of rubber material and having an outwardly flared enlarged upper section extending above said housing open end to said flat outer face.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-24 | 1978-09-23 | 1979-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-24 | 1982-09-23 | 1983-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-24 | 1986-09-23 | 1987-03-25 | $7700.00 | Window Closed / Lapsed |