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US 4,791,772 AGranted
Concrete reinforcing bar support
OwnerFrank R. Potucekinventor
Life of this patent
Estimating the term…
Abstract
A horizontally extending reinforcing bar having a central core in transverse cross-section exhibiting at least three radial fins projecting outwardly symmetrically from the center of the bar to its outer edge. Each pair of adjacent fins define a valley between them containing a pattern of raised surface area. Two in-line reinforcing bars are held together by a coupling device having a housing with multiple flexible inwardly projecting plates from grooves in an inner wall. The plates flex in the direction of insertion of a reinforcing bar and exert a force to prevent removal of the bar.
Claims2
An elongated reinforcing bar for use in concrete comprising:
- a central core,
- five tapered fins projecting radially outwardly from the central core,
- a cup between each fin,
- a plurality of longitudinally spaced raised surface areas projecting upwardly from each cup,
- the distance between a distal end of each fin and its proximal end joinder with the central core being greater than half the radius of the bar and,
- each of said raised surface areas having a cup shape.
3 more elements
Dependencies are inferred from the claim text.