Patent ID: 8632045
Filing Date: 2014-01-21
Classification: A45B,B62B,F16H,Y10T

Abstract:
1. A base assembly comprising: a load-bearing base; an articulating element rotatably coupled to the base at a first axis of rotation; at least one wheel rotatably mounted to the articulating element at a second axis of rotation offset from the first axis of rotation such that the wheel translates upon rotation of the articulating element about the first axis of rotation; an elongated shaft comprising a threaded portion in operative contact with the base and the articulating element such that rotation of the elongated shaft causes rotation of the articulating element with respect to the base, the elongated shaft further comprising a first ratchet portion; and a rotation body mounted on the elongated shaft and comprising a second ratchet portion in operative contact with the first ratchet portion to allow relative rotation in a first direction about a primary axis of the elongated shaft and to prevent relative rotation in a second direction opposite the first direction; and a pedal mounted to the rotation body such that pressing downward on the pedal causes a rotation of the rotation body in the second direction, and a corresponding rotation of the elongated shaft; wherein the rotation body is rotatable about a second axis of the elongated shaft such that upon rotation of the rotation body about the second axis the ratchet portions allow relative rotation in the second direction about the primary axis and prevent relative rotation in the first direction, such that pressing downward on the pedal causes a rotation of the rotation body in the first direction, and a corresponding rotation of the elongated shaft.