Abstract: Disclosed herein is an arm rest for a chair comprising a frame member and an arm support member, a coupling device to couple the arm support member with the frame member for rotation about an axis, the arm support member having a portion which is offset from the axis, wherein rotation of the arm support member relative to the frame member results in horizontal and vertical adjustment of the arm rest.

Abstract: A power assist device for a wheelchair comprising a body, a drive wheel connected to the body and being movable between a raised position and a lowered surface engaging position, attachments for securing the body to the frame, a first motor for driving said drive wheel at least when the drive wheel is in the lowered surface engaging position, a second motor connected to the drive wheel for raising and lowering said drive wheel, a biaser, for biasing the drive wheel into surface engaging driving contact, a manually initiated electronic controller for controlling the power assist device, and a source of electrical power.