Weight compensating frame for manually held power screw driver - has support arm with universal joint and weight equaliser coupled to rear of tool

摘要

The manually manipulated screw driver has a weight compensating holder to facilitate its use. A telescopic or one-piece support arm (16) has one end (18) swivably mounted on a vertical column (2) and the other end attached via a universal joint (15) to the rear of the screw driver (8). The weight compensating attachment (6, 7) is coupled to the universal joint and comprises, e.g. a support cable (7) leading to a spring-loaded holder (6). The screw driver itself may be coupled to a screw or nut supply unit (12) by a supply line (13) which may also incorporate the tool power supply.