A portable patient scale has a flexible carrier which may be placed under a hospital bed mattress. Pockets in the carrier hold weighing slats. Each slat has an upper beam and lower beam, with load cells interconnecting the beam on opposite ends of the slat. A microprocessor receives load cell signals...http://www.google.de/patents/US5393935?utm_source=gb-gplus-sharePatent US5393935 - Portable scale
