HEATING DEVICE FOR PARENTERAL FLUID
First Claim
1. A heating device for parenteral fluid and the like comprising:
- a. a container adapted to hold a quantity of liquid, b. an independent coil of tubing removably mounted within the container, the coil being adapted to be at least partially immersible in the liquid and spaced from the container to permit substantially free flow of the liquid over the exterior face of the coil, the coil providing a conduit adapted to convey the parenteral fluid through the liquid in heat transfer relation thereto, c. an electrical immersion heating element mounted to the container and disposed therewithin, said element being adapted to heat the liquid, d. thermostatic switching means adapted to be in contact with the liquid, the switching means being connected to the heating element and regulating the heat emission therefrom in response to the temperature of the liquid, and e. aerating means mounted to the container and adapted to supply air below the surface of the liquid whereby to facilitate the circulation thereof, f. the aerating means including;
1. an air pump mounted exteriorly of the container, 2. a substantially upright, open-ended pipe mounted interiorly of the container and including an upper, air bubble escape orifice and a lower liquid intake orifice, and 3. air passage means interconnecting the air pump to the openended pipe intermediate the intake and escape orifices, and g. the heating element including a heating portion disposed below the escape orifice and in the immediate vicinity of the intake orifice whereby heated liquid is drawn upwardly through the pipe.
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Accused Products
Abstract
A heating device for parenteral fluid includes a container holding a quantity of heat transfer liquid to which heat is imparted by a thermostatically controlled electric immersion heating element. A coil of flexible plastic tubing having adjacent coil turns fused together to form a disposable coil envelope for conveying the parenteral fluid from a reservoir to the patient is suspended within the heat transfer liquid by means of an independent, removable support frame which holds the coil envelope in an open cylindrical configuration to facilitate heat transfer from the liquid to the parenteral liquid flowing through the envelope. The frame includes extensions removably engageable with seating portions in the container. The circulation of the heat transfer liquid about the envelope is augmented by an aeration system.
41 Citations
6 Claims
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1. A heating device for parenteral fluid and the like comprising:
- a. a container adapted to hold a quantity of liquid, b. an independent coil of tubing removably mounted within the container, the coil being adapted to be at least partially immersible in the liquid and spaced from the container to permit substantially free flow of the liquid over the exterior face of the coil, the coil providing a conduit adapted to convey the parenteral fluid through the liquid in heat transfer relation thereto, c. an electrical immersion heating element mounted to the container and disposed therewithin, said element being adapted to heat the liquid, d. thermostatic switching means adapted to be in contact with the liquid, the switching means being connected to the heating element and regulating the heat emission therefrom in response to the temperature of the liquid, and e. aerating means mounted to the container and adapted to supply air below the surface of the liquid whereby to facilitate the circulation thereof, f. the aerating means including;
1. an air pump mounted exteriorly of the container, 2. a substantially upright, open-ended pipe mounted interiorly of the container and including an upper, air bubble escape orifice and a lower liquid intake orifice, and 3. air passage means interconnecting the air pump to the openended pipe intermediate the intake and escape orifices, and g. the heating element including a heating portion disposed below the escape orifice and in the immediate vicinity of the intake orifice whereby heated liquid is drawn upwardly through the pipe.
- a. a container adapted to hold a quantity of liquid, b. an independent coil of tubing removably mounted within the container, the coil being adapted to be at least partially immersible in the liquid and spaced from the container to permit substantially free flow of the liquid over the exterior face of the coil, the coil providing a conduit adapted to convey the parenteral fluid through the liquid in heat transfer relation thereto, c. an electrical immersion heating element mounted to the container and disposed therewithin, said element being adapted to heat the liquid, d. thermostatic switching means adapted to be in contact with the liquid, the switching means being connected to the heating element and regulating the heat emission therefrom in response to the temperature of the liquid, and e. aerating means mounted to the container and adapted to supply air below the surface of the liquid whereby to facilitate the circulation thereof, f. the aerating means including;
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2. a substantially upright, open-ended pipe mounted interiorly of the container and including an upper, air bubble escape orifice, and a lower liquid intake orifice, and
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3. air passage means interconnecting the air pump to the open-ended pipe intermediate the intake and escape orifices, and g. the heating element including a heating portion disposed below the escape orifice and in the immediate vicinity of the intake orifice whereby heated liquid is drawn upwardly through the pipe.
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4. A heating device for parenteral fluid and the like comprising:
- a. a container adapted to hold a quantity of liquid, b. an independent coil of tubing removably mounted within the container, the coil being adapted to be at least partially immersible in the liquid and spaced from the container to permit substantially free flow of the liquid over the exterior face of the coil, the coil providing a conduit adapted to convey the parenteral fluid through the liquid in heat transfer relation thereto, c. an electrical immersion heating element mounted to the container and disposed therewithin, said element being adapted to heat the liquid, d. thermostatic switching means adapted to be in contact with the liquid, the switching means being connected to the heating element and regulating the heat emission therefrom in response to the temperature of the liquid, e. the container including a substantially cylindrical sidewall defining an opening means at the upper end and a bottom wall, f. the coil being of flexible plastic material and including entrance and exit portions received by the opening means and adjacent coil turns being fused to form a disposable coil envelope coaxial with the container; and
g. a support frame providing a substantially rigid drum having opposed ends one of which is carried by the container and the other of which is substantially free of transverse projections to permit the disposable coil to be slidingly withdrawn directly from the drum.
- a. a container adapted to hold a quantity of liquid, b. an independent coil of tubing removably mounted within the container, the coil being adapted to be at least partially immersible in the liquid and spaced from the container to permit substantially free flow of the liquid over the exterior face of the coil, the coil providing a conduit adapted to convey the parenteral fluid through the liquid in heat transfer relation thereto, c. an electrical immersion heating element mounted to the container and disposed therewithin, said element being adapted to heat the liquid, d. thermostatic switching means adapted to be in contact with the liquid, the switching means being connected to the heating element and regulating the heat emission therefrom in response to the temperature of the liquid, e. the container including a substantially cylindrical sidewall defining an opening means at the upper end and a bottom wall, f. the coil being of flexible plastic material and including entrance and exit portions received by the opening means and adjacent coil turns being fused to form a disposable coil envelope coaxial with the container; and
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5. A heating device for parenteral fluid and the like comprising:
- a. a container adapted to hold a quantity of liquid, b. an independent coil of tubing removably mounted within the container, the coil being adapted to be at least partially immersible in the liquid and spaced from the container to permit substantially free flow of the liquid over the exterior face of the coil, the coil providing a conduit adapted to convey the parenteral fluid through the liquid in heat transfer relation thereto, c. an electrical immersion heating element mounted to the container and disposed therewithin, said element being adapted to heat the liquid, d. thermostatic switching means adapted to be in contact with the liquid, the switching means being connected to the heating element and regulating the heat emission therefrom in response to the temperature of the liquid, e. the container including a substantially cylindrical sidewall defining an opening means at the upper end and a bottom wall, f. the coil including entrance and exit portions received by the opening means and adjacent coil turns being fused to form a disposable coil envelope coaxial with the container, g. an independent support frame removably mounted in the container and providing a substantially rigid drum receiving the coil envelope in sepArable relation, the support frame being adapted to hold the coil in suspended relation in the liquid, h. aerating means mounted to the container and adapted to supply air below the surface of the liquid whereby to facilitate circulation thereof, the aerating means including;
- a. a container adapted to hold a quantity of liquid, b. an independent coil of tubing removably mounted within the container, the coil being adapted to be at least partially immersible in the liquid and spaced from the container to permit substantially free flow of the liquid over the exterior face of the coil, the coil providing a conduit adapted to convey the parenteral fluid through the liquid in heat transfer relation thereto, c. an electrical immersion heating element mounted to the container and disposed therewithin, said element being adapted to heat the liquid, d. thermostatic switching means adapted to be in contact with the liquid, the switching means being connected to the heating element and regulating the heat emission therefrom in response to the temperature of the liquid, e. the container including a substantially cylindrical sidewall defining an opening means at the upper end and a bottom wall, f. the coil including entrance and exit portions received by the opening means and adjacent coil turns being fused to form a disposable coil envelope coaxial with the container, g. an independent support frame removably mounted in the container and providing a substantially rigid drum receiving the coil envelope in sepArable relation, the support frame being adapted to hold the coil in suspended relation in the liquid, h. aerating means mounted to the container and adapted to supply air below the surface of the liquid whereby to facilitate circulation thereof, the aerating means including;
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6. A heating device for parenteral fluid and the like comprising:
- a. a container adapted to hold a quantity of liquid, b. an independent coil of tubing removably mounted within the container, the coil being adapted to be at least partially immersible in the liquid and spaced from the container to permit substantially free flow of the liquid over the exterior face of the coil, the coil providing a conduit adapted to convey the parenteral fluid through the liquid in heat transfer relation thereto, c. an electrical immersion heating element mounted to the container and disposed therewithin, said element being adapted to heat the liquid, d. thermostatic switching means adapted to be in contact with the liquid, the switching means being connected to the heating element and regulating the heat emission therefrom in response to the temperature of the liquid, e. aerating means mounted to the container and adapted to supply air below the surface of the liquid whereby to facilitate the circulation thereof, f. the aerating means including;
- a. a container adapted to hold a quantity of liquid, b. an independent coil of tubing removably mounted within the container, the coil being adapted to be at least partially immersible in the liquid and spaced from the container to permit substantially free flow of the liquid over the exterior face of the coil, the coil providing a conduit adapted to convey the parenteral fluid through the liquid in heat transfer relation thereto, c. an electrical immersion heating element mounted to the container and disposed therewithin, said element being adapted to heat the liquid, d. thermostatic switching means adapted to be in contact with the liquid, the switching means being connected to the heating element and regulating the heat emission therefrom in response to the temperature of the liquid, e. aerating means mounted to the container and adapted to supply air below the surface of the liquid whereby to facilitate the circulation thereof, f. the aerating means including;
Specification