Max one I.V. warmer

• US 6,336,003 B1
• Filed: 09/01/2000
• Issued: 01/01/2002
• Est. Priority Date: 09/01/2000
• Status: Expired due to Fees

• Current Assignee: Automatic Medical Technologies Inc.
• Original Assignee: Automatic Medical Technologies Inc.
• Inventors: Yamamoto, Yoshiaki, Mitsunaga, Michael
• Primary Examiner(s): Walberg, Teresa
• Assistant Examiner(s): CAMPBELL, THOR S
• Application Number:
  US09/653,692
• Time in Patent Office: 487 Days
• Field of Search: 392/470, 604/93.01, 604/111, 604/113, 604/118, 604/151
• US Class Current: 392/470
• CPC Class Codes: A61M 5/44 having means for cooling or heating the devices or media

Abstract

A reusable heating device comprises a casing to be disposed vertically, the casing including a circuit element receiving chamber and a heater receiving chamber having a front opening, a lid for at least covering the front opening of the heater receiving chamber, a heater situated in the heater receiving chamber, and electric circuit means situated in the circuit element receiving chamber. The heater includes a heater segment coextensive with and disposed in the front opening and an electric heating element attached to a backside and the cover unit of the heater segment. The heater segments have U-shaped channels on a front side thereof to receive therein a Disposable Cellular Pouch through which an instillation liquid to be heated flows. The U-shaped channels include at least left and right curves and extends from an upper portion of the heater segment to a lower portion thereof through the U-shaped channels to keep the instillation liquid in the Disposable Cellular Pouch between the left and right curves for a period sufficient to heat the liquid. The electric circuit means includes first and second temperature control thermistors, the first thermistor sensing temperature of the instillation liquid after passing through the heater segment for intermittently energizing the heater to heat the instillation liquid to a predetermined temperature. The second thermistor is provided at the electric heating element to turn off the electric circuit means when the electric heating element is heated beyond a predetermined temperature due to excessive flow of the instillation liquid to thereby override the control of the heater by the first thermistor. In this case the instillation fluid flow is not halted and will continue to flow without the heating.

Claims

1. A heating device for instillation comprising a casing having hanging means at one end thereof for vertically supporting the casing during use of the device, said casing including a circuit element receiving chamber and a heater receiving chamber having a front opening for securing the Disposable Cellular Pouch, a lid for at least covering said front opening of the heater receiving chamber, a heater situated in said heater receiving chamber, said heater including a heater segment coextensive with, disposed in and filling said front opening and an electric heating element attached to a backside and front side of the heater segment for heating the segment, said heater segment having U-shaped channels on a front and backside thereof for receiving a Disposable Cellular Pouch therein a liquid through which an instillation liquid to be heated flows, said lid being arranged to cover said U-shaped channels and feed pipe received therein when in closed position, said groove having left and right curves and extending from an upper portion of the heater segment to a lower portion thereof to keep the instillation liquid in the liquid feed of the disposable Cellular Pouch between left and right curves for a period sufficient to heat the liquid, and electric circuit means situated in said circuit element receiving chamber, said electric circuit means including first and second temperature control thermistors, the first thermistor sensing temperature of the instillation liquid after passing through the length of the heater segment groove for operating said circuit means to intermittently energize the heating element to heat to instillation liquid flowing through the disposable tubular holder/channels to a predetermined temperature, the second thermistor being provided at the electric heating element for operating said circuit means to turn off the electric circuit means when the electrical heating element is heated beyond a predetermined temperature due to excess flow of the instillation liquid to thereby override the control of the heating element by the first thermistor such that instillation fluid flow is not halted and will continue to flow without the heating, wherein the electric circuit means further comprises a programmable control unit, adapted to shut down the heating device after it has been in use for a predetermined period and to provide alarm while approaching the predetermined period.

2. A heating device for instillation according to claim 1, in which said lid includes a heating device with U-shaped channels pressing member to intimately hold a Disposable Cellular Pouch in the groove when the lid is closed, insulating materials being provided between the lid and the pressing member and between the casing and the electric heating element.

3. A heating device for instillation according to claim 1, in which the casing and lid are integrally formed of a synthetic resin and are joined by an integral hinge portion so that the lid can be freely opened and closed, and a sliding anchoring projection and a hook are provided on the casing and the lid respectively to keep the lid closed.