Patent attributes
A magnetic braking and spring retraction assembly comprises a spool, a one way bearing, a leash, a rod, a planetary carrier, a plurality of planetary gears, a sun gear, a ring gear, a magnetic disc, and an enclosure. An end of the leash is attached to the spool and wraps around the spool. The magnetic braking and spring retraction assembly operates in one of two modes that include a magnetic braking mode and a spring retracting mode. In the magnetic braking mode, the spool rotates in a first direction thereby causing the leash to extend away from the assembly. In the spring retracting mode, the spool rotates in a second direction and the leash is drawn towards the assembly. In one of the magnetic braking and spring retracting modes the one way bearing locks and in another of the magnetic braking and spring retracting modes the one way bearing freewheels.
