Resources Contact Us Home
Bed having user variable degree of hardness

Image Number 2 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
Methods for integrating the production of cellulose nanofibrils with the production of cellulose nanocrystals
Cylindrical lithium secondary battery comprising a contoured center pin
Current collector for lead acid battery
Brushless motor drive apparatus and drive method
Method of inspecting wafer
Selecting content for storage in a multi-device cache
Portable computer display structures
  Randomly Featured Patents
Retarded acid soluble well cement compositions and methods
Hanger and display
Dynamoelectric machine slot wedges with abrasion resistant layer
Modular central electrical unit for motor vehicles
Servo amplifier unit
Virtually applying modifications
Inrush current limiter
Buffer architecture formed on a semiconductor wafer
Brake assembly for a motorcycle