Chairs and seats – Bottom or back – Framework
Patent
1994-10-17
1996-10-15
Nelson, Jr., Milton
Chairs and seats
Bottom or back
Framework
297473, 297367, A47C 702
Patent
active
055647855
ABSTRACT:
A seat frame assembly for a motor vehicle comprises a seat frame and a seat back frame. The seat frame and seat back frame are adapted to have cushions mounted thereon. At least one of the vertical support portions is formed from a pair of telescoping tubular blanks including an elongated inner metal blank formed into an integrally formed vertical member extending from a lower portion of the seat back frame to an upper end of the seat back frame and a relatively shorter outer metal blank formed into a sleeve rigidly secured in surrounding relation to the lower portion of the vertical support member. The outer and inner blanks are formed into the sleeve and the vertical member respectively during a hydroforming process in which the inner blank is expanded so that an outer surface thereof is moved into peripheral contact with an inner surface of the outer blank and the inner blank and the outer blank are expanded into peripheral contact with die surfaces defining the exterior surfaces of the one vertical support portion.
REFERENCES:
patent: 2838100 (1958-06-01), Follows
patent: 3586376 (1971-06-01), LeMire
patent: 3822079 (1974-07-01), Probber
patent: 5246271 (1993-09-01), Boisset
patent: 5362132 (1994-11-01), Griswold et al.
patent: 5390982 (1995-02-01), Johnson et al.
patent: 5437498 (1995-08-01), Waelde
patent: 5452941 (1995-09-01), Halse et al.
Hadley Philip W.
Liu Frank Q.
McGlinnen Paul W.
Schultz Fred B.
Atoma International Inc.
Jr. Milton Nelson
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