Patent ID: 6487738
Filing Date: 2002-12-03
Classification: A47C

Abstract:
A constant restoring force structure comprising a first tubular member positioned on a base, a second tubular member slidable in said first tubular member and guided by said first tubular member, and a constant restoring force spring interconnecting said first and second tubular members, said second tubular member having an extended position whereby it is projecting outwardly of said first tubular member and a retracted position whereby it is recessed in said first tubular member, said second tubular member being responsive to a force exerted on its outward end to move into said first tubular member when said force exceeds the rating of said constant force restoring spring, the restoring force on the second tubular member urging it outwardly of the first tubular member being constant regardless of its position in the first tubular member after its first move into said first tubular member.