Form for casting stepped openings
AssigneeCalmar International, Inc.
InventorJohn B. Wong
Life of this patent
Estimating the term…
Abstract
A form for casting stepped openings in concrete walls, the form having four elongated form members arranged in a rectangle, each form member having outer casting surfaces thereon to form one side of the opening. A corner piece at each corner of the form engages the ends of the form members thereat and completes the casting surfaces thereof, the corner pieces and form members being shaped to allow translatory movement of the form members away from the sides of the opening cast thereby so that the form members may be removed from the opening. Selected of the form members have recesses in the casting surface thereof for reception of hardware to be cast into the wall, the hardware being held in the recesses by magnets.
Claims8
A form for casting a stepped opening in a concrete wall, said form comprising:
- four elongated form sections, each having a first member extending the length of said form section, said first member having an outwardly facing casting surface along the upper length thereof, a second member integral with and extending along the first member below said casting surface, said second member having outwardly and downwardly extending casting surfaces thereon and extending the length thereof, said form sections being arranged as sides of a rectangle,
- a corner piece disposed at each corner of said form, each corner piece comprising a block having an L shape in horizontal cross-section, one leg of each of said blocks being abuttable against an end of the second member of one of the form sections at that corner and having outwardly and downwardly extending casting surfaces coplanar with the casting surfaces of the second member of said one form section at that corner, the other leg of each of said blocks being abuttable against an end of the second member of the other form section at that corner and having outwardly and downwardly extending casting surfaces coplanar with the casting surfaces of the second member of said other form section at that corner,
- each corner piece further comprising a post extending upwardly from the inner junction of the legs of the block thereof, the post of each corner piece having a first side facing outwardly and forming a casting surface, the post of each corner piece being abutted with the end of the first member of said one form section at that corner and with said first side of said post coplanar with the casting surface of said first member of said one form section at that corner, the post of each corner piece having a second side adjacent to said first side threof, said second side facing outwardly and forming a casting surface, the post of each corner piece being abutted with the end of the first member of said other form section at that corner and with said second side of said post coplanar with the casting surface of said first member of said other form section at that corner, the width of said first side of each of said posts being at least as great as the thickness of said first member of said other form section at that corner.
Dependencies are inferred from the claim text.