Method of forming a spray arm

Details Method of forming a spray arm Method of forming a spray arm

1980-12-08

1983-06-14

Combs, Ervin M.

Metal working

Method of mechanical manufacture

Obtaining plural product pieces from unitary workpiece

29509, B23P 1100, B23P 1700, B21D 3902

Patent

active

043874967

ABSTRACT:
A dishwasher spray arm having a top wall portion joined to a bottom wall portion. The wall portions are constructed to be formed from identical Z-shaped sheet blanks. The wall portion edges define securing structure which, while being different in the two wall portions, are each preselected to closely fit within the Z-shaped sheet blank configuration. The Z-shaped blanks define a continuing series arranged to be cut from a strip of sheet material with a common edge between successive blanks, effectively minimizing material wastage in the formation of the spray arm. In the illustrated embodiment, the top wall portion defines further structure differing from that of the lower wall portion.

REFERENCES:
patent: 280918 (1883-07-01), Dunn
patent: 517523 (1894-04-01), Kleinfeldt
patent: 652990 (1900-07-01), Wood
patent: 2168358 (1939-08-01), Lyon
patent: 2905393 (1959-09-01), Federighi et al.
patent: 3277906 (1966-10-01), Goldman
patent: 3288155 (1966-11-01), Swetnam
patent: 3453715 (1969-07-01), Rogers

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