| 主权项 |
1. A walker apparatus comprising:
a U-shaped lower frame comprising a left lower arm and a right lower arm connected by a front lower connector, the lower frame oriented in a horizontal position; at least two swivel casters coupled to an underside of a front portion of the lower frame; at least four rear wheels, wherein at least two rear wheels are coupled to a rear portion of the left lower arm and at least two wheels are coupled to a rear portion of the right lower arm, wherein the casters and the rear wheels support and the lower frame on a floor and allowing the walker apparatus to roll across the floor; a U-shaped upper frame comprising a left upper arm and a right upper arm connected by a front upper connector, the upper frame oriented in a horizontal position generally above the lower frame, whereby the left upper arm is generally above the left lower arm and the right upper arm is generally above the right lower arm, and wherein the lower frame and upper frame are configured to surround a person on three sides; a generally vertical left double scissor mechanism interposed between the left lower arm and the left upper arm; a generally vertical right double scissor mechanism interposed between the right lower arm and the right upper arm, each double scissor mechanism comprising a top X-shaped scissor pivotally coupled to a bottom X-shaped scissor, wherein a vertical distance between the upper frame and the lower frame can be varied by simultaneously adjusting the left double scissor mechanism and the right double scissor mechanism. |
