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US 9,169,643 B2Granted
Concrete slab forming apparatus
OwnerRichard J. Dryburgh, Michael H. Maughan +1inventors
InventorsRichard J. Dryburgh, Michael H. Maughan, Graeme A. Bradley
Life of this patent
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Abstract
A form for a concrete slab which consists of a series of similarly shaped steel plates that are held in predetermined spaced relationship by a series of special rebars, (special nuts are provided) before the slab is poured. The slab is criss-crossed by rebars which extend through the form to accurately locate the remaining steel plates as well as to prevent excessive cracking of the slab.
Claims11
A concrete slab forming assembly comprising:
- a first side plate;
- a second side plate extending parallel to the first side plate;
- a first end plate extending perpendicular to each of the first side plate and the second side plate;
- a second end plate extending parallel to the first end plate and extending perpendicular to each of the first side plate and the second side plate;
- a plurality of first longitudinally extending rebars coupled at opposite ends thereof to the first side plate and the second side plate;
- a plurality of second longitudinally extending rebars extending parallel to the plurality of first longitudinally extending rebars, each one of the plurality of second longitudinally extending rebars terminating prior to reaching the first side plate and the second side plate, wherein at least one of the plurality of second longitudinally extending rebars is between two neighboring ones of the plurality of first longitudinally extending rebars;
- a plurality of first laterally extending rebars coupled at opposite ends thereof to the first end plate and the second end plate;
- a plurality of second laterally extending rebars extending parallel to the plurality of first laterally extending rebars, each one of the plurality of second laterally extending rebars terminating prior to reaching the first end plate and the second end plate, wherein at least one of the plurality of second laterally extending rebars is between two neighboring ones of the plurality of first laterally extending rebars;
- wherein each one of the first side plate, the second side plate, the first end plate, and the second end plate are made of steel.
6 more elements
A form for a concrete slab comprising:
- a set of steel members which are of similar shape joined together to surround and contain said slab on a reference surface;
- a first set of specially shaped reinforcement rods (rebars) having a threaded surface;
- said first set of rebars passing though said slab and though apertures provided in said steel members, so that special matching nuts may be threaded onto the protruding ends of said first set of rebars to physically accurately locate said steel members comprising the form;
- a second set of standard rebars spaced from said first set of rebars by a predetermined distance, said second set of rebars pass through said slab only and do not locate the steel members, the second set of standard rebars terminate prior to reaching the steel members;
- and
- said second set of rebars being maintained at a specific distance above said reference surface;
- wherein at least one of said first set of rebars extend longitudinally and at least one of said first set of rebars extend laterally;
- and
- wherein at least one of said second set of rebars extend longitudinally and at least one of said second set of rebars extend laterally.
6 more elements
Dependencies are inferred from the claim text.