Patent ID: 6962116

Claim:
A vertically adjustable shelf comprising at least first and second members disposed in substantially vertically sliding relationship to each other, said first member having a pair of substantially vertically disposed slideways defining a first distance therebetween, said first member further including a plurality of substantially vertically spaced supports opening into each of said slideways, a second effective length between the spaced supports of opposite slideways defining a second effective distance different than said first distance, said second member having at least a pair of supports, a third effective distance between said second member pair of supports which is between said first and second distances wherein (a) said first and second members are relatively vertically slidable when said second member pair of supports are disposed within said slideways and (b) said first and second members are relatively vertically nonslidable when said second member pair of supports are disposed upon said first member supports, and a shelf carried by one of said first and second members.