EP0505009A1 - Pumpenschutzsystem - Google Patents
Pumpenschutzsystem Download PDFInfo
- Publication number
- EP0505009A1 EP0505009A1 EP92200789A EP92200789A EP0505009A1 EP 0505009 A1 EP0505009 A1 EP 0505009A1 EP 92200789 A EP92200789 A EP 92200789A EP 92200789 A EP92200789 A EP 92200789A EP 0505009 A1 EP0505009 A1 EP 0505009A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pump
- sensor
- water
- orifice
- back plate
- 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.)
- Withdrawn
Links
Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
- A61H33/00—Bathing devices for special therapeutic or hygienic purposes
- A61H33/60—Components specifically designed for the therapeutic baths of groups A61H33/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/02—Stopping of pumps, or operating valves, on occurrence of unwanted conditions
- F04D15/0209—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid
- F04D15/0218—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid the condition being a liquid level or a lack of liquid supply
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
- A61H33/00—Bathing devices for special therapeutic or hygienic purposes
- A61H33/005—Electrical circuits therefor
- A61H2033/0054—Electrical circuits therefor with liquid level detectors
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
- A61H33/00—Bathing devices for special therapeutic or hygienic purposes
- A61H33/0087—Therapeutic baths with agitated or circulated water
Definitions
- This invention relates to a pump protection system especially for use with hydrotherapy baths or pools.
- Hydrotherapy baths, pools or tubs have one or more nozzles positioned below the water line in which air and water are mixed and forced into the bath producing a jet of foaming water which is said to give a therapeutic effect for persons bathing therein.
- the water circulation is effected by means of a pump, usually electrically driven, and it is desirable that the pump should not be run when the system has been drained of water.
- a sensor on the bath so that when the water level drops below a predetermined point the sensor is actuated and the pump disabled preventing dry running.
- this requires special fixing and the necessity to drill the bath which is especially undesirable where the bath is cast-iron or steel.
- the invention seeks to provide a pump protection device improved in the above respects.
- the invention comprises locating a sensor in, or communicating with, the interior of the pump.
- a pump protection device which comprises a pump back plate having an orifice therein within which to locate a water detecting sensor.
- the pump back plate is preferably a modified form of the conventional pump back plate which it replaces.
- the sensor acts directly in that it will turn off the pump when the pump is emptied irrespective of the state of the rest of the system.
- the sensor may be of a variety of types, e.g. pressure, vacuum, electronic, or the like.
- the sensor is also protected from extraneous light which can have an adverse effect on certain systems, and by positioning the sensor horizontally within the orifice droplets of water run off the sensing face so that droplets of water do not collect thereon to give erroneous signals.
- the pump generally designated 10 for use with a hydrotherapy bath or pool comprises an electric motor 12 driving an axle 14 on which is mounted an impellor 16. Inlet 18 and outlet 20 ports are provided.
- the pump 10 has a back plate 22 which, in accordance with the invention, is provided with an orifice 24 formed therein.
- the orifice 24 contains a sensor (not shown in the drawings) which, depending on the exact type employed, may communicate directly with the impellor chamber or may operate through the portion 26 of the impellor chamber wall within the orifice 24, i.e. the "orifice" 24 may in fact be blind. In this case, for example, a capacitative sensor may be employed. In any event the orifice 24 will be sealed against egress of water from the pump interior.
- the senor may advantageously be located towards the bottom of the pump body. While location on the back plate is convenient, and is currently preferred, the pump body could be drilled to accept the sensor at any desired position.
- the system of the invention is considerably more reliable than the systems hitherto employed and, moreover, is easier to install and service since the pump is usually located in an accessable position.
Landscapes
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physical Education & Sports Medicine (AREA)
- Rehabilitation Therapy (AREA)
- Pain & Pain Management (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Veterinary Medicine (AREA)
- Epidemiology (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Non-Positive-Displacement Pumps (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB919105728A GB9105728D0 (en) | 1991-03-19 | 1991-03-19 | Pump protection system |
GB9105728 | 1991-03-19 | ||
GB919120883A GB9120883D0 (en) | 1991-03-19 | 1991-10-02 | Pump protection system |
GB9120883 | 1991-10-02 |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0505009A1 true EP0505009A1 (de) | 1992-09-23 |
Family
ID=26298602
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP92200789A Withdrawn EP0505009A1 (de) | 1991-03-19 | 1992-03-19 | Pumpenschutzsystem |
Country Status (1)
Country | Link |
---|---|
EP (1) | EP0505009A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0843100A1 (de) * | 1996-11-19 | 1998-05-20 | Ksb S.A. | Pumpe mit fester Einschaltvorrichtung |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4396353A (en) * | 1981-04-13 | 1983-08-02 | Flint & Walling, Inc. | Submersible sump pump |
DE3408218A1 (de) * | 1984-03-07 | 1985-09-12 | Hugo Lahme GmbH, 5828 Ennepetal | Badewanne mit umwaelzanlage, insbesondere wirbelstrom- oder sprudel-badewanne |
DE8616503U1 (de) * | 1986-06-20 | 1986-08-28 | Lückoff, Burckhard, 5342 Rheinbreitbach | Unterdruckschalter für Saugleitungen von Pumpen |
US4645426A (en) * | 1985-04-24 | 1987-02-24 | Hartley E Dale | Bilge pump |
DE3640252A1 (de) * | 1986-11-25 | 1988-06-16 | Marcant Pumpen Gmbh | Pumpe mit eingebauter elektro-heizung |
-
1992
- 1992-03-19 EP EP92200789A patent/EP0505009A1/de not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4396353A (en) * | 1981-04-13 | 1983-08-02 | Flint & Walling, Inc. | Submersible sump pump |
DE3408218A1 (de) * | 1984-03-07 | 1985-09-12 | Hugo Lahme GmbH, 5828 Ennepetal | Badewanne mit umwaelzanlage, insbesondere wirbelstrom- oder sprudel-badewanne |
US4645426A (en) * | 1985-04-24 | 1987-02-24 | Hartley E Dale | Bilge pump |
DE8616503U1 (de) * | 1986-06-20 | 1986-08-28 | Lückoff, Burckhard, 5342 Rheinbreitbach | Unterdruckschalter für Saugleitungen von Pumpen |
DE3640252A1 (de) * | 1986-11-25 | 1988-06-16 | Marcant Pumpen Gmbh | Pumpe mit eingebauter elektro-heizung |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0843100A1 (de) * | 1996-11-19 | 1998-05-20 | Ksb S.A. | Pumpe mit fester Einschaltvorrichtung |
FR2756020A1 (fr) * | 1996-11-19 | 1998-05-22 | Ksb Sa | Pompe a dispositif fixe de mise en marche |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE FR GB IT |
|
17P | Request for examination filed |
Effective date: 19930311 |
|
17Q | First examination report despatched |
Effective date: 19941020 |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: BRONTE WHIRLPOOLS LIMITED |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 19950503 |