Apparatus for making concrete slabs
OwnerTerry L. Nolaninventor
Life of this patent
Estimating the term…
Abstract
Adjustable forms for pouring precast concrete slabs and similar articles of manufacture. The forms may be used either on site to produce concrete slabs as needed, or at a central manufacturing location, for transport to the site where needed. Concrete slabs produced with the adjustable forms may be used in patios, sidewalks, storage room or pump house floors, driveways, mobile home landings, and the like. The slabs may be steel reinforced, with expandable interlocking design, of various sizes, patterns and colors. Similar construction materials or decorative articles, such as tile, wallboard, and the like may also be produced with the improved forms.
Claims14
An adjustable device for producing concrete slabs comprising:
- a plurality of identically configured channel shaped sections similarly oriented in interlocking arrangement to define a form unit;
- each section including vertically spaced upper and lower arms and a vertical web connecting of said arms;
- each section including a main body portion and a fork joint extension thereof on at least one end thereof;
- said fork joint extension comprising upper and lower tines spaced apart at a distance substantially equal to the cross-sectional depth of said sections, so that the body portion of an adjoining section may be accepted between said tines;
- said upper and lower tines each being provided with opposing holes in vertical registration with each other, said holes being spaced apart from the end of said main section body portion for a distance substantially equal to the effective cross-sectional width of an adjoining section, so that said adjoining section may be accepted between the end of said main body portion and said holes;
- pins disposed through said opposing holes in said tines in each section, for retaining said adjoining section which is slidably accepted between said tines;
- said interlocking arrangement of said plurality of sections being one in which the body portion of each section is inserted, at a predetermined point along its body, in a fork-jointed end of an adjoining section, to provide an enclosed geometric figure having predetermined dimensions.
An adjustable device for producing rectangular concrete slabs comprising:
- four identically configured channel shaped sections similarly oriented in interlocking arrangement to define a rectangular form unit;
- each section including vertically spaced upper and lower arms and a vertical web connecting said arms;
- each section including a main body portion and a fork joint extension thereof on at least one end thereof;
- said fork joint extension comprising upper and lower tines spaced apart at a distance substantially equal to the cross-sectional depth of said sections, so that the body portion of an adjoining section may be accepted between said tines;
- said upper and lower tines each being provided with opposing holes in vertical registration with each other, said holes being spaced apart from the end of said main section body portion for a distance substantially equal to the effective cross-sectional width of an adjoining section, so that said adjoining section may be accepted between the end of said main body portion and said holes;
- pins disposed through said opposing holes in said tines in each section, for retaining said adjoining section which is accepted between said tines;
- said interlocking arrangement of said four sections being one in which the body portion of a first of said sections is inserted, at a predetermined point along its body, in a fork-jointed end of a second of said sections;
- the body portion of second section is inserted, at a predetermined point along its body, in a fork-jointed end of a third of said sections;
- the body portion of said third section is inserted at a predetermined point along its body, in a fork-jointed end of a fourth of said sections;
- and the body portion of said fourth section is inserted at a predetermined point along its body, in a fork-jointed end of said first section;
- to provide an enclosed square figure having predetermined dimensions.
Dependencies are inferred from the claim text.