Resources Contact Us Home
Bed having user variable degree of hardness

Image Number 3 for United States Patent #5504952.

A bed including a base, a mattress overlying the base and apparatus for varying the hardness of the bed to take into account the changing personal circumstances of the user, for example, aging, gaining weight etc. and to compensate for the wear and tear on the mattress. The base includes a generally rectangular frame and a plurality of crosspieces traversing thereacross such that the hardness of the bed is varied by varying the number of crosspieces. The mattress includes a filling in which its hardness is varied by varying the amount of the filling, its components or adjusting the packing density of a composite filling having a foam substrate with a plurality of substantially incompressible marble-size balls embedded therein.

  Recently Added Patents
Systems and methods to adjust the bias of an amplifier
Mechanical memory transistor
TV receiver
Semiconductor device with integrated antenna and manufacturing method therefor
Executing server side script code specified using PHP on a server to generate dynamic web pages
Coating system
Semiconductor test structures
  Randomly Featured Patents
Reconfigurable network on a chip
Complex motion toothbrush
Medical injector
Television receiver
Pharmaceutical drug dosage forms providing different release rates
High voltage amplifier
Back-light module for image scanning device and method for calibrating illumination with back-light module
Method for attaching a flexible printing plate to a plate cylinder
Use of anionic surfactant/dispersant blends for the deinking of groundwood newsprint
Systems and methods for tracking tobacco packages