Adjustable waterbed mattress support

Claim 1

Adjustable waterbed mattress support for accomodating a waterbed mattress of any of a variety of sizes, said adjustable support comprising: a pair of spaced apart side rails upstanding along respective marginal edges thereof; and accordion-type load bearing means, collapsible in the non-load bearing direction, for adjustably interconnecting said side rails, said load bearing means including a first series of elongated substantially serpentine members upstanding along respective marginal edges thereof, a second series of elongated substantially serpentine members upstanding along respective marginal edges thereof, said second series of members being oriented relative to said first series of members to have spaced contact points therewith and to be collapsible toward one another between said contact points, means for connecting said first series of members to said second series of members at said contact points, and means for connecting the outboard most member of said first and second series of members to said side rails, whereby said side rails may be positioned a desired distance apart, depending upon the size of such mattress to be supported while any such mattress is supported by said first and second series of members.