Patent US3779332A successfully refreshed from Google Patents.
Patent US3770237A successfully refreshed from Google Patents.
US3770237A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Concrete form
Assignee: Individual
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Filing: 1971-09-23
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Granted: 1973-11-06
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Expires: 1991-09-23
Abstract
Abstract A concrete form useful in forming a key contraction joint between concrete slabs. The concrete form comprises a plurality of spaced-apart, aligned stakes and an elongate rigid sheet material member having upper and lower longitudinally extending, generally coplanar portions and a longitudinally key deformation portion interposed between and connected to said planar portions. At least some of the stakes have a pocket means formed thereon. Each pocket means includes an edge engaging surface. The sheet material member has a plurality of longitudinally spaced strap means formed within one of the planar portions and said member includes a plurality of parts, each part including an edge portion which is disposed within a corresponding one of said pocket means to contact the edge engaging surface thereof to prevent movement of said member in an upwardly direction by utilizing the shear properties of the material from which said member is formed. Each strap means is disposed in partial encompassing engagement about a portion of a corresponding one of said stakes. Each pocket means includes a tab means having a portion thereof biasedly disposed in a direction toward the body portion of its corresponding stakes. Each of the parts of said member has a planform projection, taken in a direction normal to the body portion of the stakes, that is greater than the thickness of the material from which the member is formed.
Inventors
- 👤 D Burton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:28
CPC Classifications
E; E01; E01C; E01C11/00; E01C11/02; E01C11/04; E01C11/08
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
346 words
A concrete form of the type used in forming a key contraction joint between concrete slabs, said joint comprising: a plurality of spaced-apart, aligned stakes, each of said stakes having a generally vertically disposed body portion and a top, at least some of said stakes having a pocket means formed thereon, each pocket means including a tab means, each of said tab means having an edge engaging surface formed thereon, each tab means having a portion theReof biasedly disposed in a direction toward the body portion of its corresponding stake, each of said stakes adapted to be driven to a predetermined height so that the tops thereof are disposed along a predetermined grade level; and an elongate rigid sheet material member having upper and lower longitudinally extending, generally co-planar portions and a longitudinally extending key deformation portion interposed between and connected to said co-planar portions, said member having a plurality of longitudinally spaced strap means formed within one of said planar portions, the spacing of said strap means corresponding to the longitudinal spacing of said stakes, each of said strap means being disposed at least in partial encompassing engagement about a portion of a corresponding one of said stakes, said member including a plurality of parts each of which is disposed within a corresponding one of said pocket means, each of said parts including an edge portion, said edge portion being formed by a pair of intersecting surfaces disposed normal one to the other wherein one of said surfaces lies in a plane disposed generally parallel to the body portion of its corresponding stake, each edge portion being disposed within a corresponding one of said pocket means to contact the edge engaging surface thereof thereby resisting movement of said member in an upwardly direction by utilizing the shear properties of the material from which said member is formed, the horizontal distance separating the portion of said tab means and the adjacent body portion of its corresponding stake being less than the thickness of the part disposed within the pocket means associated with each said tab means.
Claim 2
Dependent Claim
346 words
A concrete form of the type used in forming a key contraction joint between concrete slabs, said joint comprising: a plurality of spaced-apart, aligned stakes, each of said stakes having a generally vertically disposed body portion and a top, at least some of said stakes having a pocket means formed thereon, each pocket means including a tab means, each of said tab means having an edge engaging surface formed thereon, each tab means having a portion theReof biasedly disposed in a direction toward the body portion of its corresponding stake, each of said stakes adapted to be driven to a predetermined height so that the tops thereof are disposed along a predetermined grade level; and an elongate rigid sheet material member having upper and lower longitudinally extending, generally co-planar portions and a longitudinally extending key deformation portion interposed between and connected to said co-planar portions, said member having a plurality of longitudinally spaced strap means formed within one of said planar portions, the spacing of said strap means corresponding to the longitudinal spacing of said stakes, each of said strap means being disposed at least in partial encompassing engagement about a portion of a corresponding one of said stakes, said member including a plurality of parts each of which is disposed within a corresponding one of said pocket means, each of said parts including an edge portion, said edge portion being formed by a pair of intersecting surfaces disposed normal one to the other wherein one of said surfaces lies in a plane disposed generally parallel to the body portion of its corresponding stake, each edge portion being disposed within a corresponding one of said pocket means to contact the edge engaging surface thereof thereby resisting movement of said member in an upwardly direction by utilizing the shear properties of the material from which said member is formed, the horizontal distance separating the portion of said tab means and the adjacent body portion of its corresponding stake being less than the thickness of the part disposed within the pocket means associated with each said tab means.
Claim 3
Dependent Claim
42 words
A concrete form as described in claim 1 in which each tab means of each pocket means, during installation of said parts of said member within said pocket means, is adapted to move away from the body portion of its corresponding stake.
Claim 4
Dependent Claim
44 words
A concrete form as described in claim 1 in which each part has a planform projection, taken in a direction generally normal to the body portion of said stakes, that is thicker than the thickness of the material from which the member is formed.
Claim 5
Dependent Claim
36 words
A concrete form as described in claim 1 in which each strap means is, in vertical cross-section, generally C-shaped in configuration and a portion of each strap means includes one of the parts of said member.
Claim 6
Dependent Claim
60 words
A concrete form as described in claim 1 in which each edge engaging surface is disposed to lie in a plane that intersects a plane disposed normal to the longitudinal axis of its associated stake to form an included angle the tangent of which is less than the coefficient of friction between said edge engaging surface and said edge portion.
Claim 7
Dependent Claim
39 words
A concrete form as described in claim 1 in which said strap means are formed within said upper planar portion of said member, and said parts of said members are disposed within said lower planar portion of said member.
Claim 8
Dependent Claim
43 words
A concrete form as described in claim 6 in which each part has a planform projection, taken in a direction normal to the body portion of said stakes, that is thicker than the thickness of the material from which the member is formed.
Claim 9
Dependent Claim
43 words
A concrete form as described in claim 1 in which said sheet material member includes a plurality of longitudinally spaced apertures formed within the lower planar portion, and the portion of each tab means is disposed within a corresponding one of said apertures.
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) | 1976-11-05 | 1977-05-07 | 1977-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-05 | 1981-05-07 | 1981-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-05 | 1985-05-07 | 1985-11-06 | $7700.00 | Window Closed / Lapsed |