Joints and connections – Interfitted members – Enlarged head in complementary recess – e.g. – dovetail – etc.
Patent
1987-10-16
1989-09-19
Kundrat, Andrew V.
Joints and connections
Interfitted members
Enlarged head in complementary recess, e.g., dovetail, etc.
403331, 5300, B25G 308
Patent
active
048675989
ABSTRACT:
A tapered dovetail mortise and tenon joint is formed within typically a post and beam or within two joists which intersect perpendicular to each other. The tapered dovetail shaped mortise portion cavity is shaped to interfit with a dovetail shaped tenon portion. The tenon portion has incorporated therein a plurality of acute angles which permit easy assembly, cause precise alignment and cause forces to be created when components are connected using the joint which forces tend to bring the mated components into very rigid tightly interfitted assembled relationship. The joint, when assembled, is not visible because of the unique configuration of the mortise and tenon portions. A very large load bearing capability of inherent in the joint partly because of the large mating surface incorporated into the side surfaces and the bottom surfaces and also partly becuase the integrity of the chords and the web of the "I-Beam" cross section of the components is not violated. The acute angle associated with the side surfaces, the acute angle associated with the bototm surface and the acute angle associated with the outward end surface, all of the tenon portion, and the related surfaces and angles of the mortise portion all cooperate in such a manner as to force the joint more tightly together as a downward loading is increased.
REFERENCES:
patent: 2614302 (1952-10-01), Johnson
patent: 4019298 (1977-04-01), Johnson
patent: 4492489 (1985-01-01), Kantorowich
Dishong George W.
Kundrat Andrew V.
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