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Hospital bed power module

  • US 5,398,149 A
  • Filed: 04/23/1993
  • Issued: 03/14/1995
  • Est. Priority Date: 04/23/1993
  • Status: Expired due to Term
First Claim
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1. A hospital bed power module for use with a motorized hospital bed having motor control circuitry, the module being carried by the bed for powering, from the bed, an external medical device which is separate from the motor control circuitry, said module comprising:

  • input power circuitry, including a ground line, for connecting to a supply source and delivering A.C. power from said supply source to said module, the bed frame being electrically connected to said ground line;

    at least one output receptacle for receiving a plug from an external medical device and coupling power from the module to the external medical device to run said medical device; and

    electrical isolation circuitry connected between the input power circuitry and the output receptacle to effectively electrically isolate leakage current associated with said external medical device from reaching the input power circuitry and ground line and to effectively prevent external medical device leakage current from traveling through the bed frame;

    whereby external medical devices may be powered directly from a bed power supply without significantly increasing the leakage current on the bed frame and the risk of shock to the patient due to the leakage current of the external device.

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