US3638619A - Thermostatically controlled liquid-heating tank - Google Patents
Thermostatically controlled liquid-heating tank Download PDFInfo
- Publication number
- US3638619A US3638619A US47054A US3638619DA US3638619A US 3638619 A US3638619 A US 3638619A US 47054 A US47054 A US 47054A US 3638619D A US3638619D A US 3638619DA US 3638619 A US3638619 A US 3638619A
- Authority
- US
- United States
- Prior art keywords
- liquid
- receptacle
- tank
- inlet
- outlet
- 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
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C1/00—Dental machines for boring or cutting ; General features of dental machines or apparatus, e.g. hand-piece design
- A61C1/0061—Air and water supply systems; Valves specially adapted therefor
- A61C1/0084—Supply units, e.g. reservoir arrangements, specially adapted pumps
Definitions
- ABSTRACT An apparatus for heating a liquid for use in medical, dental and other services comprising a receptacle for heating the liquid, thermostatic means for determining the temperature of the liquid as it exits from the receptacle, inlet and outlet means for said receptacle, said inlet and outlet means extending into the interior of the receptacle for some distance.
- the thermostatic control means are located adjacent the outlet means, and the heater means for the liquid are disposed adjacent the inlet means.
- Present apparatuses for heating water consist of, usually, a brass tank having a liquid supply line and two connections for circulation to and from point of use.
- the point of use in dental work could be a syringe which is used by the dentist to spray liquid into the mouth of the patient on whom he is operating for cavities and such.
- the water which is sprayed into the patients mouth is not returned to the tank, but during the time that the syringe is not being used the water circulates through a pipe from the tank to the syringe and then through another pipe from the syringe back to the tank.
- the total length of both these lines may be in the neighborhood of 6 ft.
- the tank would have an internal heater such as an electric immersion heater inside the tank which is controlled by a surface-mounted thermostat; that is, the thermostat is mounted on the outside surface of the tank. As the liquid temperature drops, or the liquid is drawn off for use, and a makeup liquid enters the tank, tank temperature drops. This temperature reduction is sensed by the thermostat which energizes the heater until the tank temperature reaches the high limit of the thermostat which then opens the heater circuit.
- the surface-mounted thermostat has an inherent thermal lag as the tank surface must experience a temperature change before the thermostat will operate.
- the surface sensing of temperature is inherently subject to ambient variations such as the airflow in the room where the tank is located, and the tank surface also sees the system temperature as well.
- the difference between the system temperature and the ambient temperature in the case of dental use may be about 25 F., or the difference between the desired water temperature of 105 F. and the ambient or room temperature of 80 F.
- an object of the present invention is to provide an improved apparatus for heating liquid.
- Another object of this invention is to provide an improved liquid-heating apparatus which is more responsive to temperature changes within the tank holding the liquid.
- a further object of this invention is to provide an improved liquid-heating apparatus which will more effectively and efficiently intermix the incoming feed liquid with the liquid within the tank.
- the apparatus of this invention which comprises a receptacle for liquid, inlet and outlet means extending for some distance into the interior of the receptacle, heater means disposed adjacent the inlet means and temperature-sensing means disposed adjacent the outlet means.
- FIG. I which is a front elevation view of the improved apparatus in partial cross section and FIG. 2, which is a side elevation of the apparatus.
- FIGS. 1 and 2 there is shown the liquidheating apparatus 1 of this invention which comprises a tank or receptacle 2 shown in partial cross section.
- an inlet tube 3 which extends for some distance exteriorally of the tank and extends for a longer distance into the interior of the tank 2.
- an outlet tube 4 which also extends for a short distance outside the tank and extends into the interior of the tank. It may be considered that the outlet tube 4 would be connected to a dental syringe if used for that purpose.
- a second inlet tube 5 On the opposite side of the tank is a second inlet tube 5 extending outside the tank for a distance and projecting into the tank interior, and above the inlet tube 5 is a second outlet tube 6 also projecting outside the tank and extending into the interior of the tank.
- the two inlet tubes are on one side of the axis 10 of the tank 2 and the two outlet tubes 4 and 6 are on the opposite side of axis 10.
- the relative displacement of inlet and outlet tubes may be varied as required for different applications and the disposition of the inlet and outlet tubes in FIGS. 1 and 2 are for illustration and not limited to that arrangement.
- An electric immersion heater 11 is disposed inside the tank 2 with connecting terminals 12 and 13 protruding from the tank.
- thermostat control 15 is located on the opposite side of the tank extending inwardly thereof. It should be noted in this case that the thermostat control 15 is disposed adjacent outlet tubes 4 and 6 and is, therefore, in a position to sense the temperature of the outflowing liquid as it leaves the tank.
- This thermostat control may be of the type manufactured by I'I'I Vulcan Electric, located at Danvers, Mass.
- thermostat control of this type bears the catalog number lClB2-Sl05; however, this is adduced as an example only and it is to be understood that any suitable thermostat control for this purpose of the appropriate kind can be used and is not limited to the example given.
- a high-limit thermostat 20 is also provided on the outside of the tank 2 and fastened securely thereto, such as by welding or any other suitable means.
- the thermostat 20 is shown adjacent to the outlet tubes 4 and 6 locations.
- the purpose of the thermostat 20 is to provide an over-temperature thermostat switch for backup protection, so that if the thermostat control 15 should fail the thermostat 20 would then prevent the temperature from rising above a desired point.
- the heater, thennostat 1S and thermostat 20 are series connected to effectuate this result.
- a terminal block 21 to which connections are made to the heater, the thermostat control 15 and the thermostat 20.
- This provides for a self-contained compact unit which can be easily installed by means of mounting bracket 21 and requires only three electrical connections to the apparatus, one of the connections being a ground that is connected to the tank.
- the inlet and outlet tubes extend from the tank outwardly and, therefore, connections can be made simply, by means of a rubber tube or hose or with quick connect-and-disconnect devices.
- the inlet and outlet tubes can be brazed to the tank 2 to provide watertight seals.
- the tank 2 and the inlet and outlet tubes are preferably made of stainless steel.
- the heater 11 is disposed adjacent to the inlet tube 3 so that the inlet water flowing out of tube 3 will first strike the heating element ll, thereby being heated as soon as it enters the interior of the tank. The water is thus heated more quickly and will not tend to cool the tank water thus providing more economical operation, faster and more uniform heating.
- the flow path from the inside end of tube 3 to the outlet tube 4, it will be observed, is a relatively long one so that this insures that the relatively cold water newly entering will be heated to the prevailing temperature of the liquid within the tank before it will exit through tube 4.
- the thermostatic control 15 is located adjacent to exit tube 4 and, therefore, will sense the temperature of the exit fluid, thus providing a more accurate reading of the water which is transmitted to the outside.
- Outlet tube 6 may be considered a secondary drawout and in dental work could be used for a secondary purpose, such as filling a water cup for the patient with which to rinse his mouth.
- a thermostatically controlled liquid-heating tank comprising:
- a receptacle for holding a liquid
- inlet and outlet means for said liquid said inlet means being located on one side of the axis of said receptacle and said outlet means being located on the other side of said axis; heater means disposed inside said receptacle;
- thermostatic control means disposed adjacent said outlet means to sense the temperature of said liquid at said outlet means; and second thermostatic control means disposed on the outside surface of said receptacle, said second thermostatic control means having a higher cutoff temperature than said first thermostatic control means.
- inlet means comprises a first inlet on one side of the receptacle and extending for some distance into the interior of said receptacle.
- outlet means comprises at least one outlet extending for some distance into the interior of said receptacle. 4.
- a thermostatically controlled liquid-heating tank according to claim 2 wherein said inlet means comprises a second inlet on the opposite side of said receptacle extending for some distance into the interior of said receptacle. 5.
- said outlet means comprises a second outlet disposed on the opposlte side of said tank from the side holding said first outlet means, said second outlet extending into the interior of said receptacle.
Landscapes
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Dentistry (AREA)
- Epidemiology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
Abstract
Description
Claims (6)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US4705470A | 1970-06-17 | 1970-06-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3638619A true US3638619A (en) | 1972-02-01 |
Family
ID=21946821
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US47054A Expired - Lifetime US3638619A (en) | 1970-06-17 | 1970-06-17 | Thermostatically controlled liquid-heating tank |
Country Status (1)
Country | Link |
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US (1) | US3638619A (en) |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4185187A (en) * | 1977-08-17 | 1980-01-22 | Rogers David H | Electric water heating apparatus |
US4414464A (en) * | 1981-06-24 | 1983-11-08 | Louis Cloutier | Electrical water heating device with improved internal circulation |
FR2591099A1 (en) * | 1985-12-10 | 1987-06-12 | Zinopoulos Jean | TWO SHOWER WASHING DEVICE CONTROLLED BY SELECTOR. |
US5206928A (en) * | 1990-04-03 | 1993-04-27 | Geberit Ag | Thermostat-controlled water heating device for a bidet of a water closet with damped cold water inflow |
US5257341A (en) * | 1992-06-19 | 1993-10-26 | A-Dec, Inc. | Compact in-line thermostatically controlled electric water heater for use with dental instruments |
US6289177B1 (en) | 1998-06-29 | 2001-09-11 | John W. Finger | Encapsulated heating element fluid heater |
EP1332725A2 (en) * | 2002-01-31 | 2003-08-06 | CASTELLINI S.p.A. | An apparatus for supplying and heating fluids in dental units |
US7570877B1 (en) * | 2007-02-16 | 2009-08-04 | Chao-Lin Huang | Electric water heater that keeps the hot water at a preset temperature constantly |
US20100059599A1 (en) * | 2008-09-11 | 2010-03-11 | Ray King | Closed loop heating system |
US20130016959A1 (en) * | 2011-03-04 | 2013-01-17 | Ray King | Radiant heating system and boiler housing for use therein |
US8933372B2 (en) | 2006-06-29 | 2015-01-13 | Dynacurrent Technologies, Inc. | Engine pre-heater system |
US9091457B2 (en) | 2011-03-04 | 2015-07-28 | Dynacurrent Technologies, Inc. | Electro-thermal heating system |
US9528722B1 (en) | 2014-07-16 | 2016-12-27 | Sioux Corporation | Versatile encapsulated fluid heater configuration |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2772344A (en) * | 1954-01-25 | 1956-11-27 | Handling Equipment & Mfg Compa | Electric water heater |
US2779855A (en) * | 1955-06-14 | 1957-01-29 | Boyd F Sawyer | Automatic electrically operated water heater |
FR1299281A (en) * | 1961-09-01 | 1962-07-20 | Flii Del Magro S P A | Improvements to electric water heaters |
US3353000A (en) * | 1965-03-02 | 1967-11-14 | Wei Mclain Company Inc | Cast vessel for an electric hot water heating boiler |
US3446939A (en) * | 1966-09-08 | 1969-05-27 | Patterson Kelley Co | Electric immersion water heater |
-
1970
- 1970-06-17 US US47054A patent/US3638619A/en not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2772344A (en) * | 1954-01-25 | 1956-11-27 | Handling Equipment & Mfg Compa | Electric water heater |
US2779855A (en) * | 1955-06-14 | 1957-01-29 | Boyd F Sawyer | Automatic electrically operated water heater |
FR1299281A (en) * | 1961-09-01 | 1962-07-20 | Flii Del Magro S P A | Improvements to electric water heaters |
US3353000A (en) * | 1965-03-02 | 1967-11-14 | Wei Mclain Company Inc | Cast vessel for an electric hot water heating boiler |
US3446939A (en) * | 1966-09-08 | 1969-05-27 | Patterson Kelley Co | Electric immersion water heater |
Cited By (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4185187A (en) * | 1977-08-17 | 1980-01-22 | Rogers David H | Electric water heating apparatus |
US4414464A (en) * | 1981-06-24 | 1983-11-08 | Louis Cloutier | Electrical water heating device with improved internal circulation |
FR2591099A1 (en) * | 1985-12-10 | 1987-06-12 | Zinopoulos Jean | TWO SHOWER WASHING DEVICE CONTROLLED BY SELECTOR. |
US5206928A (en) * | 1990-04-03 | 1993-04-27 | Geberit Ag | Thermostat-controlled water heating device for a bidet of a water closet with damped cold water inflow |
US5257341A (en) * | 1992-06-19 | 1993-10-26 | A-Dec, Inc. | Compact in-line thermostatically controlled electric water heater for use with dental instruments |
WO1994000077A1 (en) * | 1992-06-19 | 1994-01-06 | A-Dec, Inc. | Water heater for use with dental equipment |
US6289177B1 (en) | 1998-06-29 | 2001-09-11 | John W. Finger | Encapsulated heating element fluid heater |
EP1332725A3 (en) * | 2002-01-31 | 2003-08-13 | CASTELLINI S.p.A. | An apparatus for supplying and heating fluids in dental units |
EP1332725A2 (en) * | 2002-01-31 | 2003-08-06 | CASTELLINI S.p.A. | An apparatus for supplying and heating fluids in dental units |
US8933372B2 (en) | 2006-06-29 | 2015-01-13 | Dynacurrent Technologies, Inc. | Engine pre-heater system |
US7570877B1 (en) * | 2007-02-16 | 2009-08-04 | Chao-Lin Huang | Electric water heater that keeps the hot water at a preset temperature constantly |
US20100059599A1 (en) * | 2008-09-11 | 2010-03-11 | Ray King | Closed loop heating system |
US9429330B2 (en) | 2008-09-11 | 2016-08-30 | Dynacurrent Technologies, Inc. | Closed loop heating system |
US20130016959A1 (en) * | 2011-03-04 | 2013-01-17 | Ray King | Radiant heating system and boiler housing for use therein |
US8855475B2 (en) * | 2011-03-04 | 2014-10-07 | Dynacurrent Technologies, Inc. | Radiant heating system and boiler housing for use therein |
US9091457B2 (en) | 2011-03-04 | 2015-07-28 | Dynacurrent Technologies, Inc. | Electro-thermal heating system |
US9528722B1 (en) | 2014-07-16 | 2016-12-27 | Sioux Corporation | Versatile encapsulated fluid heater configuration |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: VULCAN ELECTRIC COMPANY; KEZAR FALLS, ME. A CORP Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:INTERNATIONAL TELEPHONE AND TELEGRAPH CORPORATION;REEL/FRAME:004097/0372 Effective date: 19830128 |
|
AS | Assignment |
Owner name: CITICORP INDUSTRIAL CREDIT, INC., SUITE 615, 1300 Free format text: SECURITY INTEREST;ASSIGNOR:VULCAN ELECTRIC COMPANY, A CORP. OF DEL.;REEL/FRAME:004101/0853 Effective date: 19830131 |
|
AS | Assignment |
Owner name: ITT CORPORATION Free format text: CHANGE OF NAME;ASSIGNOR:INTERNATIONAL TELEPHONE AND TELEGRAPH CORPORATION;REEL/FRAME:004389/0606 Effective date: 19831122 |
|
AS | Assignment |
Owner name: VULCAN ELECTRIC COMPANY, KEZAR FALLS, MAINE, A COR Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:CITICORP INDUSTRIAL CREDIT, INC.;REEL/FRAME:004443/0549 |