Abstract: Systems and methods for preventing rotation of rotor bearings in electric motors which enable retrofitting of conventionally designed bearings to use spring-loaded keys instead of elastomeric T-rings to prevent rotation while allowing axial movement of the bearings within a stator bore. An elongated, curved spring arm is positioned in the nesting groove at the outer periphery of the bearing. One end of the spring may be secured to the bearing by positioning an S-shaped bend in the spring arm through a hole in the floor of the nesting groove. A key at the opposite end of the spring arm is urged radially outward by the spring arm. The key may be positioned in a slot in the outer portion of the bearing, and the spring arm may be retained in the groove by a retaining pin installed in the groove.

Abstract: Systems and methods for preventing rotation of rotor bearings in electric motors which enable retrofitting of conventionally designed bearings to use spring-loaded keys instead of elastomeric T-rings to prevent rotation while allowing axial movement of the bearings within a stator bore. An elongated, curved spring arm is positioned in the nesting groove at the outer periphery of the bearing. One end of the spring may be secured to the bearing by positioning an S-shaped bend in the spring arm through a hole in the floor of the nesting groove. A key at the opposite end of the spring arm is urged radially outward by the spring arm. The key may be positioned in a slot in the outer portion of the bearing, and the spring arm may be retained in the groove by a retaining pin installed in the groove.

Abstract: The present invention is a retractable cargo box extension assembly for a cargo box having an area therein for hauling material. The invention includes a plurality of lift arm assemblies connected to a cargo box and to a top frame for selectively raising the top frame upwardly to an extended position and lowering the top frame to a retracted position. An interior wall connected to the top frame and extending down to the cargo box is provided for increasing the area in the cargo box when the lift arm assemblies are in the extended position. A closed loop drive system is connected to each of the lift arm assemblies and to one or more actuator means for simultaneously operating each of the lift arm assemblies when raising or lowering the top frame.

Abstract: An extension assembly having a pair of extension members which are pivotally mounted atop cargo box sidewalls. The extension members are automatically raised and lowered by pneumatic actuators having extendable and retractable rams. A roller arrangement is coupled with the extension members to vertically move and stabilize a roll-up tarpaulin apparatus and associated end-caps therewith. The roller arrangement moves in uniform cooperation with the pivoting extension members. Further, the extension members are laterally supported in the raised position by a plurality of horizontally spaced-apart supports which are pivotally connected to the extension members. The supports are pivotally connected to sliding collars mounted around trusses which laterally transverse the cargo box. During the raising operation, the sliding collars contact stoppers affixed to the trusses whereby the extension members are securely held in a vertically raised position.