US3864544A - Electric heating unit for liquid - Google Patents
Electric heating unit for liquid Download PDFInfo
- Publication number
- US3864544A US3864544A US396782A US39678273A US3864544A US 3864544 A US3864544 A US 3864544A US 396782 A US396782 A US 396782A US 39678273 A US39678273 A US 39678273A US 3864544 A US3864544 A US 3864544A
- Authority
- US
- United States
- Prior art keywords
- unit
- receptacle
- housing
- nebulizer
- contacts
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/10—Heater elements characterised by the composition or nature of the materials or by the arrangement of the conductor
- H05B3/16—Heater elements characterised by the composition or nature of the materials or by the arrangement of the conductor the conductor being mounted on an insulating base
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
- A61M16/10—Preparation of respiratory gases or vapours
- A61M16/14—Preparation of respiratory gases or vapours by mixing different fluids, one of them being in a liquid phase
- A61M16/16—Devices to humidify the respiration air
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/40—Heating elements having the shape of rods or tubes
- H05B3/42—Heating elements having the shape of rods or tubes non-flexible
- H05B3/48—Heating elements having the shape of rods or tubes non-flexible heating conductor embedded in insulating material
- H05B3/50—Heating elements having the shape of rods or tubes non-flexible heating conductor embedded in insulating material heating conductor arranged in metal tubes, the radiating surface having heat-conducting fins
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
- F24H1/10—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium
- F24H1/12—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium
- F24H1/14—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium by tubes, e.g. bent in serpentine form
- F24H1/142—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium by tubes, e.g. bent in serpentine form using electric energy supply
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H2250/00—Electrical heat generating means
- F24H2250/02—Resistances
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
- H05B2203/014—Heaters using resistive wires or cables not provided for in H05B3/54
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S261/00—Gas and liquid contact apparatus
- Y10S261/65—Vaporizers
Definitions
- van Amerongen 1 ELECTRIC HEATING UNIT FOR LIQUID [75] Inventor: Edward van Amerongen, Wilmette,
- ABSTRACT An electric heating unit for heating a rising column of liquid and adapted to be interposed between the liquid supply receptacle and a nebulizer for use in inhalation therapy
- the heating unit has an apertured pointed member for insertion through the breachable sealing membrance closing the liquid outlet of the receptacle.
- a tube extends from the pointed member to the inlet of the nebulizer and conveys the liquid from the receptacle to the nebulizer.
- a thermostatically controlled electric heater surrounds the tube to uniformly heat the fluid as it flows from the receptacle to the nebulizer.
- a safety switch controllable by the orientation of the housing, provides means for checking whether the unit is properly grounded to prevent electric shock.
- a number of indicator bulbs visible through the housing walls, are provided to indicate electrical conditions in the unit.
- the present invention relates generally to the field of inhalation therapy and more particularly to apparatus which humidifies oxygen before it is administered to a patient.
- Inhalation therapy is the medical art of treating a patient with oxygen, or a mixture of air and oxygen, having a high moisture content. This is generally accomplished by atomizing or nebulizing pure water and causing the oxygen to come into contact with it, whereby the oxygen is humidified.
- a particular system for accomplishing this is disclosed in application Ser. No. 286,692, filed Sept. 6, I972 by the present applicant for Nebulizer. Briefly, the aforementioned application shows a system in which a receptacle containing water is adapted as a source of atomized liquid through the agency of a nebulizer which couples oxygen pressure to the receptacle. A venturi within the nebulizer draws water from the receptacle and directs atomized water and oxygen toward an outlet from which the humidified oxygen flows.
- the present invention alleviates these problems by providing a heating unit which is compact, efficient, and capable of accurately maintaining the temperature of the humidified oxygen at the desired level.
- the water to be atomized is drawn through an electric heating unit which is placed between the receptacle and the nebulizer.
- the unit has a housing which is adapted for coupling to a receptacle of the closed end type and to a nebulizer such as the one disclosed in the abovementioned US. patent application.
- an electric heating element which heats a tubular member which conducts the rising column of water from the receptacle to the nebulizer. The water is thus heated immediately prior to its introduction into the nebulizer.
- the housing also contains a thermostat which controls the electric current which flows into the heating element.
- a number of small bulbs, visible from outside the housing, are provided to indicate various electrical conditions within the housing.
- a switch controllable by the orientation of the housing, provides a means of checking whether the unit is properly grounded to prevent electric shock.
- FIG. 1 shows the unit connected for operation.
- FIG. 2 shows a vertical section of the unit taken on line 2-2 of FIG. 1.
- FIG. 3 shows a side elevation of the interior elements of the unit.
- FIG. 4 shows a horizontal section of the interior elements taken on line 4-4 of FIG. 2 looking in the direction of the arrows.
- FIG. 5 shows an elevation view of the unit with parts broken away on line 5-5 of FIG. 4.
- FIG. 6 shows a perspective view of the interior elements of the unit.
- FIG. 7 is the same view as FIG. 5 with the unit inverted.
- FIG. 8 is a schematic wiring diagram DESCRIPTION OF THE PREFERRED EMBODIMENT Referring to FIGS. 1 and 2, the unit 10 is connected to nebulizer l2 and water receptacle 14.
- the nebulizer 12 has a threaded hollow extension 13 which screws onto a threaded extension 15 of the unit.
- the receptacle 14 has a breachable membrane 11 sealing threaded extension 17 which is screwed into threaded portion 19 of the unit.
- a three conductor power cord 16 provides electric power to the unit and passes into the unit through hole 18.
- the unit has a cylindrical housing 20 preferably composed of a transparent or translucent plastic or other electrically insulating material.
- the lower part of the housing has a plurality of tubes or bores 22, one of which accommodates power cord 16.
- Indicator bulbs such as bulb 32 are disposed in other tubes.
- a metal tube 21 Coaxial with the housing 20 and threaded portions 15 and 19 is a metal tube 21.
- the upper end of the tube is sealed in a water tight manner within passage 21 of the threaded extension 15.
- the lower end is sealed at hole 23 in the bottom of the housing concentric with threaded portion 17.
- a pointed tubular means 24 Also sealed at 23 and in fluid communication with tube 21 is a pointed tubular means 24 extending outwardly having holes 25 therein.
- the pointed tubular means 24 breaches the membrane 11 and enters into the receptacle.
- the tube 21 is thereby rendered in fluid communication with the interior of the receptacle, the fluid entering the tube through the holes 25 in the pointed tubular means 24.
- tube 21 is in fluid communication with the interior of nebulizer 12 when they are screwed together.
- a rising column of liquid from receptacle 14 is drawn through tube 21 into the nebulizer by means of the pressure difference caused by oxygen flowing through the nebulizer.
- an electric heater is provided adjacent the tube.
- a heating element 26 is disposed within a horizontal bore in metal block 27.
- the block also has a vertical bore 28 ments are shown in more detail in FIGS. 3 and 4, re-
- Printed circuit board 29 has a hole 31 in the center and is mounted on tube 21.
- the electrical circuit components which will be further described below, such as fuse 33, bulb 34 and 36, and resistors 35 and 37, are mounted thereon.
- the tubes 34 and 36 extend downwardly from the board 29 into bores 22 in a manner similar to bulb 32 shown in FIG. 2.
- the thermostat 30 is mounted on one side of block 27 and senses the heat emanating therefrom. Electrical contacts 38 and 39 are mounted on parallel metal blades 40 and 41, respectively. A bimetal strip 42 having an electrically insulating rod 43 is mounted parallel to the blades. The blades and bimetal strip are electri' cally insulated from each other and the block by insulating spacers 44. As can be seen more clearly in FIG. 8, the current for the heating element passes between contacts 38 and 39. In operation, the contacts are normally closed and current passes to the heating element 26 to heat the fluid in the tube, as described above. When a predetermined temperature is reached the bimetal strip 42 begins to bend away from the block.
- the rod 43 pushes against flexible blade 40 and opens the contacts, whereupon current flow through the heating element 26 is interrupted.
- the bimetal strip returns to its original position and the contacts 38 and 39 are closed.
- the temperature of the unit and hence the temperature to which the flowing liquid is raised, is kept within a narrow range.
- a rigid metal support strut 55 carrying a rotable screw having a threaded section screwed into a hole 45 in the support strut. The screw extends through an aperture in blade 40 to contact blade 41 and can be adjusted to necessitate more or less movement required of the bimetal strip to open the contacts, thus adjusting the operating temperature.
- a switch for checking the ground connection comprises spaced contacts 47 and 48 and metal ball 46 which serves under proper conditions to electrically connect the contacts.
- the contacts 47 and 48 are stiff wires extending downward from the circuit board 29 a certain distance into one of the abovementioned bores 22. Within this bore, and
- fuse 33 is inserted into one of the current carrying conductors to' protect against excessive current draw.
- Bulb 34 and series resistor 35 are connected across the current carrying conductors and thus the bulb is lit ment is on or off at any particular time.
- An electric heating unit for heating a rising column of liquid adapted to be screwed onto a liquid receptacle having an upwardly facing threaded portion adapted to receive the unit, the receptacle being closed at said threaded portion by a breachable membrane, and adapted to be screwed onto a nebulizer having a downwardly facing threaded portion adapted to receive the resting on the bottom under normal operating condi- 6 unit, so that the unit can be functionally disposed between the receptacle and the nebulizer, comprising:
- a housing having an upwardly facing threaded portion which can be mated with the threaded portion of said nebulizer, and a downwardly facing threaded socket whereby the unit can be screwed onto the threaded portion of said receptacle, said socket having concentrically a tubular apertured breaching means adapted at one end to extend into the threaded portion of the receptacle when the unit is screwed thereon to breach said membrane;
- tubular member within said housing having one and in fluid communication with the other end of said tubular means and the other end disposed concentrically within the upward facing'threaded portion of said housing;
- thermostat disposed adjacent said heater and electrically connected to control said heater
- said electric heater comprises:
- a heating element disposed within the second bore in good heat conducting relationship with the block, whereby the heating element heats the block and the block heats the tubular member.
- thermostat comprises:
- a bimetal member for sensing temperature having an insulating rod extending in the direction of the bimetal member movement adjacent said contacts and operable to open said contacts upon movement of said bimetal member at a predetermined temperature.
- thermostat further comprises a rigid metal support to which a rotable screw is adjustably attached,-the screw adjustment determining the amount of movement required of the bimetallic member to open said contacts, whereby the operating temperature of the thermostat is adjustable.
- said housing has at least one light transmissive part, further including at least one bulb within the housing adjacent the light transmissive part and electrically connected so as to indicate electrical conditions within the unit.
- said electric power cord has a pair of current carrying conductors and a neutral conductor
- said housing has a vertical bore
- a metal ball is disposed in said bore and has free vertical movement therein;
- a pair of physically separated electrical wire contacts are disposed at the top of said bore and extend a distance therein, one contact being connected to said neutral conductor;
- a bulb with two leads has one lead connected to one of said current carrying conductors and the other lead connected to the other of said wire contacts, whereby the ball rests against both contacts when the unit is inverted and the bulb lights if the unit is properly grounded.
- one of said bulbs is connected between the two current carrying conductors to indicate when the power is being applied to the unit;
- Another of said bulbs is connected in parallel with said heater element to indicate when power is being applied to the heater element.
- the unit of claim 8 further comprising a printed circuit board upon which said bulbs and wire contacts are mounted.
- the unit of claim 9 further including a plurality of vertical bores in said housing below the circuit board, said bulbs extending into the bores from the circuit board.
Abstract
Description
Claims (10)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US396782A US3864544A (en) | 1973-09-13 | 1973-09-13 | Electric heating unit for liquid |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US396782A US3864544A (en) | 1973-09-13 | 1973-09-13 | Electric heating unit for liquid |
Publications (1)
Publication Number | Publication Date |
---|---|
US3864544A true US3864544A (en) | 1975-02-04 |
Family
ID=23568583
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US396782A Expired - Lifetime US3864544A (en) | 1973-09-13 | 1973-09-13 | Electric heating unit for liquid |
Country Status (1)
Country | Link |
---|---|
US (1) | US3864544A (en) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4012473A (en) * | 1975-07-16 | 1977-03-15 | Arbrook, Inc. | Nebulizer-humidifier |
US4038980A (en) * | 1973-11-12 | 1977-08-02 | Imre Fodor | Air humidifiers |
US4084587A (en) * | 1975-07-17 | 1978-04-18 | Arbrook, Inc. | Fluid heating apparatus |
US4238666A (en) * | 1978-03-13 | 1980-12-09 | Pomper William R | Portable electric single service beverage heating device |
US4532088A (en) * | 1983-05-19 | 1985-07-30 | Inspiron Corporation | Heated respiratory therapy humidifier |
WO1986002566A1 (en) * | 1984-11-01 | 1986-05-09 | Bear Medical Systems, Inc. | Humidifier system for breathing air |
US5388574A (en) * | 1993-07-29 | 1995-02-14 | Ingebrethsen; Bradley J. | Aerosol delivery article |
US6250301B1 (en) * | 1997-08-28 | 2001-06-26 | Hortal Harm B.V. | Vaporizer for inhalation and method for extraction of active ingredients from a crude natural product or other matrix |
US6516971B1 (en) * | 2000-10-30 | 2003-02-11 | Nordson Corporation | Apparatus and method of sensing temperature of an electric valve |
US20140007866A1 (en) * | 2011-03-31 | 2014-01-09 | Japan Medicalnext Co., Ltd. | Nebulizer system and heater device for use in said nebulizer system |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3296415A (en) * | 1963-08-12 | 1967-01-03 | Eisler Paul | Electrically heated dispensable container |
US3308993A (en) * | 1966-03-16 | 1967-03-14 | Victor M Bruno | Foam-producing and foam-dispensing means |
US3322349A (en) * | 1964-10-19 | 1967-05-30 | Leroy H Knibb | Apparatus and system for dispensing hair preparations |
US3358885A (en) * | 1966-01-17 | 1967-12-19 | Eversharp Inc | Dispenser with heating means |
US3378673A (en) * | 1965-10-18 | 1968-04-16 | Thomas O. Hopper | Electrically heated hose assembly |
US3437791A (en) * | 1965-10-21 | 1969-04-08 | Charles S Gardner | Electrical heating attachment for aerosol cans |
US3695516A (en) * | 1970-11-19 | 1972-10-03 | Stile Craft Mfg Inc | Heated nebulizer spray unit |
-
1973
- 1973-09-13 US US396782A patent/US3864544A/en not_active Expired - Lifetime
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3296415A (en) * | 1963-08-12 | 1967-01-03 | Eisler Paul | Electrically heated dispensable container |
US3322349A (en) * | 1964-10-19 | 1967-05-30 | Leroy H Knibb | Apparatus and system for dispensing hair preparations |
US3378673A (en) * | 1965-10-18 | 1968-04-16 | Thomas O. Hopper | Electrically heated hose assembly |
US3437791A (en) * | 1965-10-21 | 1969-04-08 | Charles S Gardner | Electrical heating attachment for aerosol cans |
US3358885A (en) * | 1966-01-17 | 1967-12-19 | Eversharp Inc | Dispenser with heating means |
US3308993A (en) * | 1966-03-16 | 1967-03-14 | Victor M Bruno | Foam-producing and foam-dispensing means |
US3695516A (en) * | 1970-11-19 | 1972-10-03 | Stile Craft Mfg Inc | Heated nebulizer spray unit |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4038980A (en) * | 1973-11-12 | 1977-08-02 | Imre Fodor | Air humidifiers |
US4012473A (en) * | 1975-07-16 | 1977-03-15 | Arbrook, Inc. | Nebulizer-humidifier |
US4084587A (en) * | 1975-07-17 | 1978-04-18 | Arbrook, Inc. | Fluid heating apparatus |
US4238666A (en) * | 1978-03-13 | 1980-12-09 | Pomper William R | Portable electric single service beverage heating device |
US4532088A (en) * | 1983-05-19 | 1985-07-30 | Inspiron Corporation | Heated respiratory therapy humidifier |
WO1986002566A1 (en) * | 1984-11-01 | 1986-05-09 | Bear Medical Systems, Inc. | Humidifier system for breathing air |
US5388574A (en) * | 1993-07-29 | 1995-02-14 | Ingebrethsen; Bradley J. | Aerosol delivery article |
US6250301B1 (en) * | 1997-08-28 | 2001-06-26 | Hortal Harm B.V. | Vaporizer for inhalation and method for extraction of active ingredients from a crude natural product or other matrix |
US6481437B1 (en) | 1997-08-28 | 2002-11-19 | Hortapharm B.V. | Enhanced isolation chambers for ascending-stream extractive vaporizer |
US6516971B1 (en) * | 2000-10-30 | 2003-02-11 | Nordson Corporation | Apparatus and method of sensing temperature of an electric valve |
US20140007866A1 (en) * | 2011-03-31 | 2014-01-09 | Japan Medicalnext Co., Ltd. | Nebulizer system and heater device for use in said nebulizer system |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3864544A (en) | Electric heating unit for liquid | |
US3894213A (en) | Fluid circulating heating pad | |
US3659604A (en) | Humidifying means | |
US3614385A (en) | Blood-heating apparatus | |
AU614875B2 (en) | Improvements in or relating to humidifying apparatus | |
US5019690A (en) | Boiling water dispenser having improved water temperature control system | |
NO860310L (en) | Inhalers. | |
GB810728A (en) | Electric frying pan | |
US5038752A (en) | Boiling water dispenser having improved water temperature control system | |
US3219795A (en) | Electrically heated humidifier | |
US2690500A (en) | Electrically heated vaporizer with fuse | |
US5434386A (en) | Electric circuit having a heater element and a night light | |
GB2178629A (en) | Aroma generating apparatus with electrical heating element | |
US4165681A (en) | Electrical water heater and dispenser | |
US4983813A (en) | Submersible aquarium heater with adjustable electronic thermostatic control | |
US1559461A (en) | Gas and vapor indicating device | |
US2213723A (en) | Electrical heating unit | |
US2691707A (en) | Means for controlling operation of a moisture control device | |
GB1319947A (en) | Electric immersion heaters | |
US3659278A (en) | Fire and smoke alarm device | |
US1745420A (en) | Self-contained electrical regulator unit | |
EP0549333A1 (en) | An iron | |
US3376405A (en) | Incubating apparatus | |
US1689004A (en) | Apparatus for waving hair | |
US4633066A (en) | Thermostatically controlled dual mode electric water heating receptacle |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent suit(s) filed | ||
AS | Assignment |
Owner name: MANUFACTURERS HANOVER TRUST COMPANY Free format text: SECURITY INTEREST;ASSIGNOR:RESPIRATORY CARE INC.;REEL/FRAME:005060/0188 Effective date: 19881031 |
|
AS | Assignment |
Owner name: RESPIRATORY CARE, INC., ILLINOIS Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:MANUFACTURERS HANOVER TRUST COMPANY, AS AGENT;REEL/FRAME:005249/0733 Effective date: 19890712 |
|
AS | Assignment |
Owner name: HUDSON OXYGEN THERAPY SALES COMPANY, A CA CORP., C Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:RESPIRATORY CARE, INC.;REEL/FRAME:005228/0683 Effective date: 19890712 |
|
AS | Assignment |
Owner name: FIRST INTERSTATE BANK OF CALIFORNIA Free format text: SECURITY INTEREST;ASSIGNOR:HUDSON RESPIRATORY CARE, INC.;REEL/FRAME:005302/0948 Effective date: 19900209 |
|
AS | Assignment |
Owner name: HOMEFED BANK, F.S.B. Free format text: SECURITY INTEREST;ASSIGNOR:HUDSON RESPIRATORY CARE INC.;REEL/FRAME:005300/0204 Effective date: 19900509 |
|
AS | Assignment |
Owner name: CREDITANSTALT-BANKVEREIN, CALIFORNIA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:HUDSON RESPIRATORY CARE INC.;REEL/FRAME:006570/0759 Effective date: 19920914 |