Patent ID: 8919361
Filing Date: 2014-12-30
Classification: A45B,B62B,B62J,E04H,F16M,G05F,Y10T

Abstract:
1. A base assembly comprising: a load supporting frame comprising one or more wheels movable between deployed and undeployed positions; a circular ratcheting gear rotatably mounted to the load supporting frame and comprising a plurality of teeth and an eccentric opening within the circular ratcheting gear; a first ratcheting pawl coupled to the load supporting frame, the first ratcheting pawl being adjacent the ratcheting gear to form a ratcheting relationship with the ratcheting gear substantially allowing rotation of the ratcheting gear in only a first direction relative to the first ratcheting pawl; an elongated member pivotably mounted within the opening and comprising a second ratcheting pawl mounted to the elongated member adjacent to the ratcheting gear to form a ratcheting relationship with the ratcheting gear substantially allowing rotation of the ratcheting gear in only the first direction relative to the second ratcheting pawl; and a linkage pivotably mounted within the opening and pivotably mounted to one or more of the wheels, wherein pivoting of the elongated member in one direction causes a rotation of the ratcheting gear relative to the first ratcheting pawl and no rotation relative to the second ratcheting pawl, the second ratcheting pawl being disposed to move with the elongated member to push the ratcheting gear into rotation with the elongated member; and wherein rotation of the ratcheting gear relative to the first ratcheting pawl can cause a movement of the opening that causes a movement of the linkage to move the one or more wheels between the deployed and undeployed positions.