US3614048A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arrangements for use in the supporting of formwork for the casting of concrete slabs
Assignee: Rapid Metal Developments Ltd
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Filing: 1968-11-06
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Granted: 1971-10-19
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Expires: 1988-11-06
Abstract
Abstract A concrete slab-casting system includes props with heads beams extending between the heads and panels resting on elements slidable vertically on the beams. The elements can be locked in raised positions for the casting operation and lowered for removal of the panels one at a time. The joints between the beams and the heads permits removal of the beams without lowering the heads.
Inventors
- 👤 George B A Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:51
CPC Classifications
E; E04; E04G; E04G11/00; E04G11/36; E04G11/38; B; B28; B28B; B28B7/00; B28B7/0029; B28B7/0032; E04G11/48; E04G11/486
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
205 words
Formwork for casting concrete slab comprising the combination of a plurality of props, a plurality of heads mounted on said props respectively, each head having a form surface and means for the clamping thereto of a pair of aligned beams, a plurality of beams supported between the heads, each beam having a form surface extending throughout its entire length and coplanar with the form surfaces of the heads, a plurality of panel-supporting elements independently slidably mounted on parts of the beam at spaced positions along the length thereof, a plurality of panels supported by said panel-supporting elements and locking means for supporting said panel-supporting elements in operative positions in which the mould faces of said panels are coplanar with the form surfaces of the beams and of the heads, said locking means being releasable to permit movement of said panel-supporting elements individually to inoperative positions enabling said panels to be removed after lowering thereof from the undersurface of the cast concrete slab whilst leaving the form surface of the beam in supporting contact with the slab and the clamping means of the heads being releasable to permit removal of the beams whilst leaving the form surfaces of the heads in supporting contact with the slab.
Claim 2
Dependent Claim
205 words
Formwork for casting concrete slab comprising the combination of a plurality of props, a plurality of heads mounted on said props respectively, each head having a form surface and means for the clamping thereto of a pair of aligned beams, a plurality of beams supported between the heads, each beam having a form surface extending throughout its entire length and coplanar with the form surfaces of the heads, a plurality of panel-supporting elements independently slidably mounted on parts of the beam at spaced positions along the length thereof, a plurality of panels supported by said panel-supporting elements and locking means for supporting said panel-supporting elements in operative positions in which the mould faces of said panels are coplanar with the form surfaces of the beams and of the heads, said locking means being releasable to permit movement of said panel-supporting elements individually to inoperative positions enabling said panels to be removed after lowering thereof from the undersurface of the cast concrete slab whilst leaving the form surface of the beam in supporting contact with the slab and the clamping means of the heads being releasable to permit removal of the beams whilst leaving the form surfaces of the heads in supporting contact with the slab.
Claim 3
Dependent Claim
147 words
An elongated beam for use in the casting of concrete slabs, said beam being adapted at its ends to be supported between props and having a form surface extending throughout its entire length, a plurality of bars extending perpendicularly to said form surface at spaced positions along the length of the beam, a plurality of panel-supporting elements independently slidably mounted on said bars, locking means for supporting said panel-supporting elements in operative positions in which panels supported by said panel-supporting elements will have their mould faces coplanar with the form surface of the beam, said locking means being releasable to permit movement of said panel-Supporting elements individually to inoperative positions enabling panels supported, in use, by said panel-supporting elements to be removed after lowering thereof from the undersurface of the cast concrete slab, whilst leaving the form surface of the beam in supporting contact with the slab.
Claim 4
Dependent Claim
147 words
An elongated beam for use in the casting of concrete slabs, said beam being adapted at its ends to be supported between props and having a form surface extending throughout its entire length, a plurality of bars extending perpendicularly to said form surface at spaced positions along the length of the beam, a plurality of panel-supporting elements independently slidably mounted on said bars, locking means for supporting said panel-supporting elements in operative positions in which panels supported by said panel-supporting elements will have their mould faces coplanar with the form surface of the beam, said locking means being releasable to permit movement of said panel-Supporting elements individually to inoperative positions enabling panels supported, in use, by said panel-supporting elements to be removed after lowering thereof from the undersurface of the cast concrete slab, whilst leaving the form surface of the beam in supporting contact with the slab.
Claim 5
Dependent Claim
38 words
A beam as claimed in claim 2 in which said locking means comprises a plurality of locking plates captive on said uprights respectively and engageable with said bars to support said panel supporting elements at their opposite positions.
Claim 6
Dependent Claim
33 words
A beam as claimed in claim 3 in which each locking plate has an aperture of keyhole-shaped configuration having a narrower portion which is engageable with a groove portion of the associated bar.
Claim 7
Dependent Claim
28 words
A beam as claimed in claim 2 in which each panel-supporting element comprises a platform of a rectangular form and four projections at the corners of said platform.
Claim 8
Dependent Claim
164 words
The combination of a beam with a head for a prop, said beam being adapted at both its ends to be connected to such a head and having a form surface extending throughout its entire length, a plurality of panel-supporting elements independently slidably mounted on parts of the beam in spaced positions along the length thereof, locking means for supporting said panel-supporting elements in operative positions in which panels supported by the panel-supporting elements will have their mould faces coplanar with the form surface of the beam, said locking means being releasable to permit movement of said panel-supporting elements individually to inoperative positions enabling panels supported, in use, by said panel-supporting elements to be removed after lowering thereof from the undersurface of the cast concrete slab, whilst leaving the form surface of the beam in supporting contact with the slab, said head having a form surface alignable with the form surface of the beam and having means for the clamping thereto of the beam.
Claim 9
Dependent Claim
164 words
The combination of a beam with a head for a prop, said beam being adapted at both its ends to be connected to such a head and having a form surface extending throughout its entire length, a plurality of panel-supporting elements independently slidably mounted on parts of the beam in spaced positions along the length thereof, locking means for supporting said panel-supporting elements in operative positions in which panels supported by the panel-supporting elements will have their mould faces coplanar with the form surface of the beam, said locking means being releasable to permit movement of said panel-supporting elements individually to inoperative positions enabling panels supported, in use, by said panel-supporting elements to be removed after lowering thereof from the undersurface of the cast concrete slab, whilst leaving the form surface of the beam in supporting contact with the slab, said head having a form surface alignable with the form surface of the beam and having means for the clamping thereto of the beam.
Claim 10
Dependent Claim
45 words
The combination claimed in claim 6 in which said form surface is provided by an upper plate on the head, said clamping means comprising a clamping screw adapted to clamp a lug on the end of the beam against the underside of said upper plate.
Claim 11
Dependent Claim
22 words
The combination claimed in claim 6 in which the head is adapted for the clamping thereto of a pair of aligned beams.
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) | 1974-10-18 | 1975-04-19 | 1975-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-18 | 1979-04-19 | 1979-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-18 | 1983-04-19 | 1983-10-19 | $7700.00 | Window Closed / Lapsed |