AIR-OPERATED HAMMER Russian patent published in 1997 - IPC

FIELD: mechanical engineering; percussive tools; pneumatic picks. SUBSTANCE: air-operated hammer has housing, impact unit arranged in housing, hollow handle accommodating impact unit cup rigidly secured relative to housing, and vibration isolator in form of travel limiter, movable thrust member and system of per-tensioned springs two of which being installed in tandem at different sides of thrust member. First spring rests with its free end face against travel limiter. Free end of second spring rests on impact unit cup. Third spring of the system is installed in parallel with first one and is arranged similar to first spring. EFFECT: enhanced operation. 2 dwg