Joints and connections – Interfitted members – Rigid angle
Patent
1991-05-06
1993-04-20
Kundrat, Andrew V.
Joints and connections
Interfitted members
Rigid angle
403340, 403364, 403403, 52536, 52539, F16B 1202
Patent
active
052036391
ABSTRACT:
A dado joint is provided between first and second members and includes at least one elongated groove formed in the first member of a constant width and constantly varying depth in the likeness of a shallow, smoothly curving sine wave. The second member includes a marginal edge tongue of constant thickness for mating with and snug reception within the groove, the tongue including a sine wave likeness longitudinal contour corresponding to the aforementioned sine wave and being seated and secured in the groove. A first form of the invention includes a single groove and mating tongue portion while a second form of the invention includes double adjoining grooves in the first member with the shallower and deeper groove portions of one groove being laterally registered with the deeper and shallower portions of the other groove, respectively, and a tongue equipped second member including a pair of mating tongue portions also being longitudinally offset relative to each other whereby the projections and recesses defined by one tongue portion are laterally registered with the recesses and projections, respectively, of the other tongue portion.
REFERENCES:
patent: 350803 (1886-10-01), Camburn
patent: 491383 (1893-02-01), Stiggleman
patent: 1067910 (1913-07-01), Florey
patent: 2430200 (1947-11-01), Wilson
patent: 3692340 (1972-09-01), Roth
patent: 4025215 (1977-05-01), Murdock et al.
patent: 4057356 (1977-11-01), Nissen
patent: 4112986 (1978-09-01), Strange et al.
patent: 4274756 (1981-06-01), Lange
patent: 4352588 (1982-10-01), Davies, III
patent: 4760870 (1988-08-01), Speck
Kim Harry C.
Kundrat Andrew V.
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