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US 4,137,680 AGranted
Hole plug for insulated injection wall holes
OwnerR. Dean Doonaninventor
Life of this patent
Estimating the term…
Abstract
An exterior building wall includes insulation injection holes filled by hole plugs. The hole plugs each include a disc-shaped circular outwardly convex head. Arcuate in transverse cross-section legs are radially inwardly offset from the outer peripheral edge of the head. The legs include a series of longitudinally outwardly tapering shoulders which form wall gripping and sealing teeth.
Claims8
A hole plug for insulation injection holes in building walls comprising,
- a circular disc shaped head having a plurality of peripherally disposed transverse arcuate legs, radially inwardly offset from the outer edge of said head thereby forming a flange having a flat bottom surface and said head having a slightly convex outer surface to blend into a wall surface, said legs having adjacent straight longitudinal edges in spaced relation and including exterior surfaces having a series of annular shoulders tapered longitudinally away from said head thereby forming gripping teeth, said flange and the flat surface of said annular shoulder adjacent said flange forming an annular space therebetween and said flat bottom surface of said flange being parallel to said flat surface of said adjacent annular shoulder and the bottom surface of said annular space being perpendicular to said flat bottom surface of said flange and said flat surface of said adjacent annular shoulder.
Dependencies are inferred from the claim text.