Patent attributes
A motion controller for use with a rod (10A, 10B, 10C) has a backlash reducer (88A, 88B, 88C) that substantially reduces or eliminates the space created after manufacturing parts with specified tolerance dimensions to substantially reduce or eliminate backlash. The backlash reducer (88A, 88B) can be in the form of a holder such as an internal retaining ring (78) and a shim (36), a threaded cap (38), or the like to accommodate various part size variances due to manufacturing tolerances. Alternately, the end cap (45) of the motion controller (10C) can have an outside thread (41) that mates to an inside thread (43) of the inside surface (54) of a housing (29). The motion controller (10A, 10B, 10C) has a friction collar (12) to hold the rod (14) under the action of balls (16) and a piston (18). The motion controller (10A, 10B, 10C) can be fluid powered with a fluid such as air.
