STRAIGHTENER Russian patent published in 2011 - IPC E04F21/16 

FIELD: construction.

SUBSTANCE: straightener comprises a body made of a tetrahedral monolithic section with a working edge and a holder in the form of two longitudinal grooves, each made on two opposite faces of the body. Each of two longitudinal grooves is made as symmetrical relative to its longitudinal plane of symmetry, at the same time longitudinal planes of symmetry of both longitudinal grooves are arranged in one plane.

EFFECT: expansion of operational capabilities due to comfort of operation by means of reliable retention of the straightener in operator hands, elimination of warp and no necessity to apply the additional force during straightener retention.

2 dwg