US3780977A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Concrete form liner
Assignee: HARGRAVES BEATRICE A
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Filing: 1971-12-10
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Granted: 1973-12-25
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Expires: 1991-12-10
Abstract
Abstract A liner assembly for attaching to a structural concrete form to provide a desired texture to concrete walls and columns, including multiple form liner elements constructed to be snapped together and attached to the structural form. Each of the elements is trough shaped, with an inner wall and pair of side walls, one of the side walls having a flange with a first hook at its end, and the other side wall having a second hook and a retainer near the second hook. The form liner elements can be snapped together, with the first hook of one element retained between the second hook and retainer of another form liner element in an overlapping, interlocking connection, and the flanges of each of the elements can be nailed or otherwise fastened to the structural form. The interlocking elements allow an architect to vary the wall texture or pattern at selected areas, such as at doorways, and facilitates reuse of the liners because they can be taken apart and reassembled to any desired wall size, the interlocking feature preventing leakage of concrete between the liner elements.
Inventors
- 👤 S Dashew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:29
CPC Classifications
E; E04; E04G; E04G9/00; E04G9/10
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
219 words
A concrete form comprising: a structural form having a support surface for withstanding the pressure of poured concrete; and a plurality of form liner elements each element having at least one inner wall spaced from said support surface and first and second side walls extending from an inner wall of the element towards said support surface, said first side wall having a flange extending along and fastened facewise to said support surface and said flange having a first hooking member at its end extending away from said support surface, the outer end of said second side wall spaced from said support surface and having a second hooking member thereon extending towards said first side wall, each of said elements also having a retainer with a portion spaced from said second hook on a side thereof to lie between said first and second side walls; said elements arranged with the flange of a first of said elements extending between said support surface and the second side wall of a second of said elements, with the first hooking member of said first element engaged with the second hookIng member of said second element in an overlapping, interlocking connection and with said first hooking member of said first element closely held between said second hooking member and retainer of said second element.
Claim 2
Dependent Claim
219 words
A concrete form comprising: a structural form having a support surface for withstanding the pressure of poured concrete; and a plurality of form liner elements each element having at least one inner wall spaced from said support surface and first and second side walls extending from an inner wall of the element towards said support surface, said first side wall having a flange extending along and fastened facewise to said support surface and said flange having a first hooking member at its end extending away from said support surface, the outer end of said second side wall spaced from said support surface and having a second hooking member thereon extending towards said first side wall, each of said elements also having a retainer with a portion spaced from said second hook on a side thereof to lie between said first and second side walls; said elements arranged with the flange of a first of said elements extending between said support surface and the second side wall of a second of said elements, with the first hooking member of said first element engaged with the second hookIng member of said second element in an overlapping, interlocking connection and with said first hooking member of said first element closely held between said second hooking member and retainer of said second element.
Claim 3
Dependent Claim
171 words
A concrete form comprising: a structural form having a support surface for withstanding the pressure of poured concrete; and a plurality of trough-shaped liner elements of substantially constant cross-section each having an inner wall spaced from said support surface and first and second outwardly extending side walls extending toward the support surface, said first side wall having a flange extending sidewardly along said support surface away from said second side wall and having a first hook at its end, and said second side wall having a second hook at its outer end extending towards said first side wall, the first hook on at least one of said elements engaging the second hook of another element in an overlapping, interlocking connection, said flange having a concrete-facing surface opposite the support surface, said concrete-facing surface being unobstructed the the other element so that the concrete-facing surface determines the location of the formed concrete, and said flange being fastened facewise to the support surface so that the position of the flange is accurately fixed.
Claim 4
Dependent Claim
171 words
A concrete form comprising: a structural form having a support surface for withstanding the pressure of poured concrete; and a plurality of trough-shaped liner elements of substantially constant cross-section each having an inner wall spaced from said support surface and first and second outwardly extending side walls extending toward the support surface, said first side wall having a flange extending sidewardly along said support surface away from said second side wall and having a first hook at its end, and said second side wall having a second hook at its outer end extending towards said first side wall, the first hook on at least one of said elements engaging the second hook of another element in an overlapping, interlocking connection, said flange having a concrete-facing surface opposite the support surface, said concrete-facing surface being unobstructed the the other element so that the concrete-facing surface determines the location of the formed concrete, and said flange being fastened facewise to the support surface so that the position of the flange is accurately fixed.
Claim 5
Dependent Claim
42 words
The concrete form described in claim 2 wherein: each of said tough-shaped elements has a retainer wall with a portion spaced from said second hook of the same element by a distance sufficient to maintain therebetween the first hook on another element.
Claim 6
Dependent Claim
209 words
A concrete form liner comprising: a structural form having a liner-supporting surface; and a plurality of trough-shaped elements of substantially constant cross-section each having an inner wall spaced from the liner-supporting surface and first and second side walls extending outwardly towards the liner-supporting surface, the first side wall of each element having a flange extending sidewardly away from the second side wall, the flange being disposed facewise against the liner-supporting surface, and the flange having a first hook at its end, the second side wall of each element having a second hook at its outer end extending towards said first side wall and engaged with the second hook of another element in an overlapping, interlocking connection; each element also having a retainer wall with a portion spaced from the second hook of the same element by a distance sufficient to maintain therebetween the first hook on the other element; the outer end of the second wall being spaced from the liner-supporting surface by a distance equal to the thickness of the flange and being sidewardly spaced from the first side wall of the other liner element so that the flange of the other element is uncovered and therefore can directly contact concrete poured within the assembly of form lines.
Claim 7
Dependent Claim
209 words
A concrete form liner comprising: a structural form having a liner-supporting surface; and a plurality of trough-shaped elements of substantially constant cross-section each having an inner wall spaced from the liner-supporting surface and first and second side walls extending outwardly towards the liner-supporting surface, the first side wall of each element having a flange extending sidewardly away from the second side wall, the flange being disposed facewise against the liner-supporting surface, and the flange having a first hook at its end, the second side wall of each element having a second hook at its outer end extending towards said first side wall and engaged with the second hook of another element in an overlapping, interlocking connection; each element also having a retainer wall with a portion spaced from the second hook of the same element by a distance sufficient to maintain therebetween the first hook on the other element; the outer end of the second wall being spaced from the liner-supporting surface by a distance equal to the thickness of the flange and being sidewardly spaced from the first side wall of the other liner element so that the flange of the other element is uncovered and therefore can directly contact concrete poured within the assembly of form lines.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-24 | 1977-06-25 | 1977-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-24 | 1981-06-25 | 1981-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-24 | 1985-06-25 | 1985-12-25 | $7700.00 | Window Closed / Lapsed |