Patent classifications
B
PERFORMING OPERATIONS; TRANSPORTING
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B21
MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
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B21D
WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
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9/00
Bending tubes using mandrels or the like
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B21D9/05
co-operating with forming members
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B21D9/07
with one or more swinging forming members engaging tube ends only
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B21D9/073
with one swinging forming member
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