Patent ID: 6554346
Filing Date: 2003-04-29
Classification: B60J

Abstract:
An apparatus for opening and closing a wing door which is hinged to a vehicle body of a motor vehicle, the vehicle body having a frame, said apparatus being accommodated in a space defined by the frame when the wing door is closed, characterized in that said apparatus comprisesa first arm which is pivotally mounted on the vehicle body so as to pivotally move in association with the opening and closing of the wing door; a second arm which is swingably linked between one end of said first arm and the wing door; a spring having one end which is supported relative to the vehicle body for generating a biasing force to lift up the wing door; a spring rod which is connected to the other end of said spring so as to move in association with the extension and retraction of said spring; a third arm which is swingably linked between the other end of said first arm and said spring rod; and a guide to guide said spring rod or a link point between said spring rod and said third arm for moving said spring rod in a direction which is substantially parallel with an axis of said spring.