Patent ID: 7220184
Filing Date: 2007-05-22
Classification: A63G

Abstract:
1. A seesaw for supporting a first person and a second person, the seesaw comprising: a base; a beam; a pivotal coupling that pivotally couples the beam to the base such that the beam can pivot about a pivotal axis; a first seat on the beam for supporting the first person, wherein the first seat is at a first adjustable distance away from the pivotal axis; a second seat on the beam for supporting the second person, wherein the second seat is at a second adjustable distance away from the pivotal axis, and the first seat and the second seat are at opposite ends of the beam; a rack-and-pinion assembly that includes a rack mounted at a substantially fixed location relative to the beam and a pinion engaged with the rack; a rotatable actuator coupled to and rotatable with the pinion such that rotation of the rotatable actuator rotates the pinion, and rotation of the pinion adjusts a position of the pinion relative to the rack, which in turn varies the first adjustable distance and the second adjustable distance; a track coupled to the beam and being substantially parallel to the rack; and a track follower coupled to the track such that the track follower can travel along and be guided by the track, wherein the track follower helps support the rotatable actuator and helps define the pivotal axis.