Hospital bed power module
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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Abstract
A hospital bed electrical power module for powering external medical devices directly from the bed includes electrical isolation circuitry connected to prevent external device leakage current from traveling through the bed frame. The power module reduces the risk of shock to the patient due to the leakage current of the external device.
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Citations
18 Claims
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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:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method of powering external medical devices from a motorized hospital bed including motor control circuitry for moving the bed, a ground line and a bed frame connected to said ground line, the method comprising:
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coupling a supply source of A.C, power with an input power circuit positioned on the bed and coupled to said ground line; coupling at least one output receptacle to the input power circuit, the receptacle configured to received a plug from an external medical device separate from the motor control circuitry; plugging a power cord of an external medical device into the receptacle to power the external device through the input power circuit, the medical device being separate from the motor control circuitry and generating leakage current; coupling an electrical isolation circuit between the input power circuit and the receptacle to effectively electrically isolate said leakage current from reaching the input power circuit 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. - View Dependent Claims (17, 18)
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Specification