Bicycle downtube processing machine

Details Bicycle downtube processing machine Bicycle downtube processing machine

1994-02-25

1995-01-03

Briggs, William

Metal working

Plural diverse manufacturing apparatus including means for...

Binding or covering and cutting

29 26A, 83 54, 83466, 408 30, B22P 1302

Patent

active

053773977

ABSTRACT:
A bicycle downtube processing machine includes a drill unit for drilling holes on a downtube for a bicycle frame, first cutting unit for cutting the right end of the downtube by punching, a second cutting unit for cutting a downwards bevel edge on the left end of the downtube by punching, a third cutting unit for cutting an inwardly curved top edge on the left end of the downtube by punching, a first locating unit for moving the downtube to the processing position for processing, a second locating unit for holding down the downtube in the processing position, and a control circuit for controlling the operation of the aforesaid units.

REFERENCES:
patent: 2542538 (1951-02-01), Kraeft et al.
patent: 3991927 (1976-11-01), Napor et al.
patent: 4106379 (1978-08-01), Spengler
patent: 4123189 (1978-10-01), Ferlise et al.
patent: 4680849 (1987-07-01), Diekman
patent: 4741081 (1988-05-01), Redman
patent: 5249818 (1993-10-01), Patterson

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