Abstract: An improved power tool torque and weight balancing apparatus for use in in-line assembly processes that require power tools, such as in the assembly of automotive engines. The power tool and weight balancing apparatus consists of a pivoting mounting frame, either suspended from a rail or fixedly mounted on a four-roller trolley, attached to a balancer frame that holds an air or spring powered balancer mechanism. The balancer mechanism has a cable with a swivel connector attachment which travels inside a set of telescoping tube members and attaches to a mechanism for holding a power tool. The mechanism for holding a power tool may hold a horizontally or vertically mounted power tool and is pivotable 360 degrees for operator convenience.

Abstract: A fluid mixing unit (10) for agitating, mixing and/or blending fluids (41) held in a container (11). The mixing unit (10) has an impeller module (12) that may be relatively permanently affixed to the container (11). An impeller shaft (24) is rotatably mounted in the impeller module (12) to rotate an impeller (37) secured to the shaft (24) and disposed interiorly of the container (11). The mixing unit (10) also includes a power module (14) that may be demountably secured to the impeller module (12) by virtue of a fast make/break connector (15). The first component (55) of the make/break connector (15) is presented from the impeller module (12), and the second component (79) thereof is presented from the power module (14). A quick connect coupling (48) effects a driving connection between the power module (14) and the impeller shaft (24). A locking means (85) may be employed to prevent at least inadvertent disengagement of said fast make/break connector (15).