Patent US3811646A successfully refreshed from Google Patents.
US3811646A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Form for portable concrete building module
Assignee: NELSON T CO
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Filing: 1972-11-17
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Granted: 1974-05-21
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Expires: 1992-11-17
Abstract
Abstract The form is used for casting wall portions of a single rectangular room as a modular unit to be assembled with other such units and floor and ceiling structure to build homes, apartment houses and other buildings. The form comprises a core form and two exterior forms. The core form is contractible in all directions for stripping. The two exterior forms are L-shaped, each embracing one end wall and one side wall of the room, these forms being supported by trolleys on diagonal tracks for movement away from each other in stripping.
Inventors
- 👤 R Beasley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:40
CPC Classifications
B; B28; B28B; B28B7/00; B28B7/22
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
185 words
A form for casting portable concrete building modules having four integral room size walls, comprising a contractible rectangular core whose walls correspond in size to said room size walls, a pair of L-shaped exterior forms having the same height as the core which close together in a rectangle spaced about the core to define with the core a four-sided vertical cavity, releasable means connecting the ends of one of said exterior forms to the ends of the other exterior form at two opposite corners of the rectangle, said releasable means permitting complete separation of said two exterior forms from each other, trolleys supporting said exterior forms for horizontal movement toward and away from said core, and tracks below the four corners of the rectangle for said trolleys of both exterior forms extending approximately at right angles to a diagonal vertical plane through said two opposite corners, whereby movement of said exterior forms along said tracks causes maximum and equal separation of the exterior forms from all four sides of the contracted core and enables ready vertical removal of a cast module from the form cavity.
Claim 2
Dependent Claim
185 words
A form for casting portable concrete building modules having four integral room size walls, comprising a contractible rectangular core whose walls correspond in size to said room size walls, a pair of L-shaped exterior forms having the same height as the core which close together in a rectangle spaced about the core to define with the core a four-sided vertical cavity, releasable means connecting the ends of one of said exterior forms to the ends of the other exterior form at two opposite corners of the rectangle, said releasable means permitting complete separation of said two exterior forms from each other, trolleys supporting said exterior forms for horizontal movement toward and away from said core, and tracks below the four corners of the rectangle for said trolleys of both exterior forms extending approximately at right angles to a diagonal vertical plane through said two opposite corners, whereby movement of said exterior forms along said tracks causes maximum and equal separation of the exterior forms from all four sides of the contracted core and enables ready vertical removal of a cast module from the form cavity.
Claim 3
Dependent Claim
63 words
A form as defined in claim 1, wherein said releasable means comprises a straight horizontal swing bolt pivotally mounted at one end to one exterior form and swingable into and out of a notched bracket affixed to the other exterior form and a wing nut on the other end of the bolt serving to clamp and unclamp the exterior form at said bracket.
Claim 4
Dependent Claim
64 words
A form as defined in claim 1, including a rectangular, open center pouring apron having downwardly outwardly sloping walls, means detachably supporting said apron on said core, horizontal stay bolts projecting outward from the four sides of said apron, and means on said exterior forms having detachable engagement with the outer ends of said stay bolts to prevent outward deflection of said exterior forms.
Claim 5
Dependent Claim
25 words
A form as defined in claim 3, said last means comprising upstanding brackets on said exterior forms having vertical slots to receive said stay bolts.
Claim 6
Dependent Claim
98 words
A form as defined in claim 1, wherein during casting said four-sided vertical cavity is closed at the bottom by a rectangular pallet frame formed of I-beams, there being four plates seated on the upper flanges of said I-beams against whose opposite edges abut lower portions of the walls of said core and exterior forms, swing bolts each pivoted at one end to the pallet frame and swingable into a notched bracket affixed to an exterior form, and wing nuts on the other ends of said swing bolts for releasably clamping the exterior forms to the pallet frame.
Claim 7
Dependent Claim
55 words
A form as defined in claim 5, wherein the walls of said core in their bottom portions where they abut said plates seated on the pallet are reinforced by internal bracing plates, said bracing plates being adjustably pressed outwardly by the heads of bolts which are threaded into walers fixed to and within the core.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-05-20 | 1977-11-19 | 1978-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-20 | 1981-11-19 | 1982-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-20 | 1985-11-19 | 1986-05-21 | $7700.00 | Window Closed / Lapsed |