SAPPER'S SHEARS Russian patent published in 2006 - IPC B23D29/00 B26B17/00 

FIELD: hand tools for cutting round, square, hexahedral and other metal shapes; removal of barriers on emergency objects; cutting reinforcement in construction engineering.

SUBSTANCE: proposed shears have pair of powerful levers with holes located symmetrically relative to their center of turn where pair of identical cutting knives are placed; knives have slots for item to be cut and holes for pins of load-bearing articulations. Holes for pins of load-bearing articulations are located on plane of each cutting knife over longitudinal axis symmetrically relative to transversal axis; two holes are made in form of slots (every other hole) oriented perpendicularly relative to common axis of holes. One cutting knife of pair is laid on other one by reverse side, so that holes of one cutting knife of pair is laid on slots of other one.

EFFECT: reduced usage of metal; reduced overall dimensions; increased cutting coefficient; enhanced durability of shears; improved service characteristics.

2 dwg