Method of making a chair leg base

Details Method of making a chair leg base Method of making a chair leg base

1976-04-05

1977-06-07

Hall, Carl E.

Metal working

Means to assemble or disassemble

Puller or pusher means, contained force multiplying operator

72367, 113116G, 113116UT, 228171, 228173, 228174, 2481887, B21D 5116

Patent

active

040273644

ABSTRACT:
A tapered tubular chair base leg is formed from a tube of uniform cross section throughout its length by deforming the bottom wall and adjoining portions of the sidewalls of the tube inwardly to produce an interior rib which is inclined throughout its length relative to the longitudinal axis of the tube. The smaller end of the formed tube is then formed to close the end and provide a downwardly open bore for frictionally embracing a tubular caster-mounting bushing.

REFERENCES:
patent: 2007597 (1935-07-01), Dean
patent: 2992803 (1961-07-01), Good
patent: 3086741 (1963-04-01), Cramer, Jr.
patent: 3298086 (1967-01-01), Gasser

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