Joints and connections – Branched – Three or more radiating members
Patent
1976-05-06
1978-02-07
Shedd, Wayne L.
Joints and connections
Branched
Three or more radiating members
403176, F16B 722
Patent
active
040724328
ABSTRACT:
A framework joint comprises a square open-ended tube and a connector fitting comprising a preferably cubical hub portion having a tube-receiving projection or post extending from one of two or more faces thereof having a similar projection. Each tube-receiving projection has diametrically opposed portions of maximum spacing adapted frictionally to engage the opposed flat inner surfaces of a square tube and diametrically opposing portions of lesser spacing between said portions of maximum spacing and which provide clearance for the passage of a flexible resilient locking tongue inclining inwardly and axially from the wall of the square tube. The locking tongue preferably has a convex shape to be engageable by the recessed radially outwardly facing surface of a groove formed in the associated tube-receiving projection of the connector fitting. The tongue initially is located over the projection portions of lesser spacing and extends beyond the outer margin of a projection groove when a tube and connector fitting projection are initially loosely telescoped together. The tongue is deformed into the groove by the force imparted by the recessed groove surface when the tube or connector fitting is rotated 45.degree., and the deformed tongue draws the connector fitting and tube axially together.
REFERENCES:
patent: 3283639 (1966-11-01), Holton
patent: 3532369 (1970-10-01), Reilly
patent: 3666298 (1972-05-01), Reilly
Capitol Hardware Manufacturing Company, Inc.
Shedd Wayne L.
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