System enables lifting and positioning of large, heavy window frames and comprises two separately functioning, pneumatically or hydraulically empowered carriages which clamp and support window frame

摘要

The system enables the lifting and positioning of large, heavy window frames and comprises two separately functioning, pneumatically or hydraulically empowered carriages (1) which clamp and support the window frame (4). It permits the window frame to be turned and fixed around its longitudinal axis at the correct work height, with disengagement of a monorail (5) used.