Patent classifications
B
PERFORMING OPERATIONS; TRANSPORTING
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B21
MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
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B21J
FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
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7/00
Hammers; Forging machines with hammers or die jaws acting by impact
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B21J7/20
Drives for hammers; Transmission means therefor
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B21J7/46
Control devices specially adapted to forging hammers, not restricted to one of the preceding subgroups
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