LIFTER Russian patent published in 2006 - IPC B66B9/02 

FIELD: handling equipment.

SUBSTANCE: lifter has drive adapted for rotation of drive rollers and equipped with at least one drum mounted within casing, and load bearing bar positioned in axial opening of drum. Drum is connected through said transmission with engine for rotation within casing around axis of load bearing bar embraced thereby. Said drum is positioned for restricted axial displacement relative to casing. Axes of drive rollers have at their ends pivot joints mounted within drum so as to prevent axial displacement thereof relative to drum. One of pivot joints of pin of each drive roller is positioned for radial displacement relative to axis of load bearing bar and other pivot joint is positioned for displacement in curvilinear path and for synchronous restricted rotation of axes of drive rollers so as to be declined from position wherein said pins are in parallel with axis of load bearing bar, with drive rollers being biased to said bar at any instant of such rotation by means of controlled drive. On said rotation, axes of drive rollers are arranged in planes extending in parallel with axis of load bearing bar. Lifter is equipped with drives for altering biasing force of drive rollers applied to load bearing bar in proportion with weight of load to be handled and with at least one guiding bar for cooperation with guiding rollers. Counterbalance placed within cavity of load bearing bar is connected through flexible binders and pulleys with casing for balancing weight of casing and loading platform.

EFFECT: increased service life of lifter.

3 cl, 9 dwg