Patent ID: 6494423
Filing Date: 2002-12-17
Classification: A47B,B62H

Abstract:
A extendable support member comprising:a first elongate member defining a longitudinal bore along a longitudinal axis, wherein an inner surface of the bore includes a recess; a second elongate member adapted to be received in the longitudinal bore of the first member, wherein an outer surface of the second member includes a recess that is canted relative to the longitudinal axis; a locking element disposed within the recess of the second member, the locking element being movable within the recess of the second member from a first position to a second position under the influence of gravity as the first and second members are moved from a first relative attitude to a second relative attitude, the first position being characterized by engagement of the locking element with both the recess of the first member and the recess of the second member; and a spring urging the second member toward a retracted position within the longitudinal bore of the first member.