Abstract: A vehicular automatic parallel parking system adapted for installation either as a factory option or as a retrofit kit. A microprocessor-based controller exercises control over a hydraulic valve which regulates the fluid to the vehicle's power steering cylinder. Preferably the system controls the vehicle's standard power steering valve through a solenoid attachment, although a separate solenoid-operated valve in parallel with the power steering valve can be used in retrofit installations if necessary. By its sensing of rearward distance moved by the vehicle, the controller is able to control turning during a parallel parking maneuver through its regulation of the solenoid-operated valve.

Abstract: Uneven parallel bars for gymnastics have motors for variably establishing not only the spacing between the handrails but also different predetermined vertical heights of the handrails relative to the floor surface. A single motor at each end of the handrails performs all of the adjustments without requiring any movement or adjustment of the tensioning cables. The motors are able to adjust the handrails not only prior to a gymnast's performance, but also during the performance if desired.