REPLACEABLE HAND-HELD TOOL Russian patent published in 2006 - IPC A01B1/22 A01B1/00 

FIELD: manufacture of hand-held tools for horticultural, repairing and construction works.

SUBSTANCE: replaceable hand-held tool has replaceable working device with connection member equipped with at least one through oval-shaped opening, shank-holder having shank and holder for replaceable working device and including shank-tip equipped with threaded portion and adapted for retaining of working device in assembled state by means of pin. Shank tip has axial through opening provided on the side of attachment of replaceable working device and equipped with centering annular bore and threaded portion provided on its internal surface. Connection member is made cylindrical and has threaded portion and thread-free portion provided on its external surface. Diameter of thread-free portion is equal to diameter of centering bore. Round through apertures are formed on its thread-free portion. Diametrical slots are formed on end surface of shank tip, on the side of attachment of replaceable working device, said slots being adapted for receiving of fixing pin with wedge-shaped working surface. Set of through openings are provided on side surface of shank tip, on portion equipped with centering bore, said openings being adapted for receiving of pin having cylindrical working surface. Connection units have retainer, such as pin with rubber ring placed into one of round through apertures of holder and into oval-shaped opening of connection member, to prevent replaceable working device and handle from unscrewing away from shank.

EFFECT: simplified construction and manufacture process, enhanced reliability in operation, wider operational capabilities and convenient usage.

5 cl, 6 dwg