Stock material or miscellaneous articles – Three or more coplanar interfitted sections with securing means
Patent
1984-05-14
1986-05-20
Murtagh, John E.
Stock material or miscellaneous articles
Three or more coplanar interfitted sections with securing means
428 95, 15217, 52181, 52586, B32B 300
Patent
active
045901104
ABSTRACT:
A grid designed for use as a runner or a doormat comprises a multiplicity of parallel profiled bars, preferably of plastic, having a generally U-shaped cross-section with two upstanding flanges interconnected at their lower ends by a horizontal web. In certain embodiments each flange has an inverted-Y profile with one arm joined to the web and the other arm diverging therefrom, the two arms defining between them an undercut, downwardly open longitudinal groove which in the case of at least one flange has a cross-section in the shape of an upwardly pointed arrowhead facilitating the introduction, from below, of a substantially complementarily shaped upstanding rib of a connecting member of much shallower U-profile linking a pair of adjoining bars to each other. The underside of the connecting member is either flush with that of the bars or at a slightly lower level. A channel bounded by the two flanges of the bar is also undercut, at approximately the level of the groove undercuts of the inverted-Y profiles, for positive engagement with a complementarily profiled stiffly elastic rail holding a strip of yieldable tread-supporting material projecting upwardly from the rail and the bar to form a part of the upper mat surface.
REFERENCES:
patent: 3247637 (1966-04-01), Robertson
patent: 3783471 (1974-01-01), McGeary et al.
patent: 3992839 (1976-11-01), La Borde
patent: 4029834 (1977-06-01), Bartlett
patent: 4221833 (1980-09-01), Guillermin et al.
patent: 4381324 (1983-04-01), Ellingson, Jr.
Dennison Caroline
Dubno Herbert
Murtagh John E.
Ross Karl F.
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