US3635593A - Device for body care - Google Patents

Device for body care Download PDF

Info

Publication number
US3635593A
US3635593A US885221A US3635593DA US3635593A US 3635593 A US3635593 A US 3635593A US 885221 A US885221 A US 885221A US 3635593D A US3635593D A US 3635593DA US 3635593 A US3635593 A US 3635593A
Authority
US
United States
Prior art keywords
pump
plunger
core
frequency
pulses
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
Application number
US885221A
Other languages
English (en)
Inventor
Michel A Moret
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
INST RECH DIFFUSION IND
Institut De Recherche Et De Diffusion Industrielle Pge Woog
Original Assignee
INST RECH DIFFUSION IND
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by INST RECH DIFFUSION IND filed Critical INST RECH DIFFUSION IND
Application granted granted Critical
Publication of US3635593A publication Critical patent/US3635593A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • A61C1/0092—Pumps specially adapted therefor

Definitions

  • An electromagnetic pump for supplying liquid pressure pulses to oral hygiene devices imposing different loads thereon includes a plunger-core driven in one direction by an electromagnetic circuit supplied with constant frequency pulses at power line frequency, a spring providing a restoring force so that the plunger-core reciprocates.
  • the plunger-core drives a pump for producing the liquid pressure pulses, advantageously by using one end of the plunger-core as the piston of a pump.
  • the mechanical resonant frequency of the plunger-core and spring is higher than the applied pulse frequency, and predetermined to yield an approximately constant amplitude of reciprocation for different loads imposed on the pump.
  • the present invention relates to a pump for producing a stream of liquid pressure pulses, particularly for oral hygiene devices such as liquid jet devices and toothbrushes.
  • One of the constant problems in the field of oral hygiene is to make available to the public a simple and efficient system guaranteeing a perfect cleaning of the teeth and of interdental spaces as well as a stimulation of blood circulation in periodontal tissues.
  • Guinness British Pat. No. 382,430 describes a system composed essentially of a rotating electric motor which, through a transmission system including an eccentric, drives a piston supplied with different rather complicated accessories. With this apparatus, Guinness obtained a jet of pulsated liquid in the range of 3,000 pulsations per minute, for oral treatment. Mattingly U.S. Pat. No. 3,227,158 discloses a liquid jet device using lower pulse frequencies which has been commercialized. Other devices with intermittent pulsated jets have also been commercialized. However, up to now all such known devices have utilized rotating motors reciprocating a piston through a gearing and yoke mechanism, etc.
  • the working frequency of the devices now on the market is generally in the range of 700 and 2,000 pulsations per minute, averaging about 1,200 per minute. These frequencies are unfavorable, especially if one wants to use an hydraulic motor driven toothbrush, as disclosed in U.S. Pat. No. 3,536,065. Since the brush works at a frequency corresponding to that of the jet pulsations, such frequencies are too low, the average frequency corresponding to 20 hertz. It has been medically proven that a frequency range between 50 and 70 hertz should be reached by the brush, in order to provide an optimal brushing and polishing.
  • the present invention provides a much simpler pump than the systems referred to above.
  • the pump operates without any mechanical transmission in synchronization with the power mains at 50 or 60 hertz, and thus makes it possible to optimize the washing and brushing functions.
  • the pressure pulse output can easily be modulated as disclosed in U.S. application Ser. No. 849,464 to yield, for example, pulses at a rate of 3,000 or 3,600 per minute which are modulated at a frequency between 200 and 300 per minute.
  • an electromagnetic pump comprising a reciprocally mounted plunger-core including a plunger and a core of magnetic material united therewith.
  • Elastic means such as a coil spring provides a restoring force for the plunger-core.
  • the plunger-core is driven by an electromagnetic circuit including a coil which is energized by constant frequency current pulses.
  • the current pulses are advantageously derived from a power mains alternating current source of 50 to 60 hertz, as by a simple rectifier circuit, and the plunger-core reciprocates at the corresponding frequency.
  • the plunger-core drives a pump including an inlet connection for supplying liquid to the pump and an outlet connection for supplying liquid pressure pulses from the pump to an oral hygiene device.
  • a pump including an inlet connection for supplying liquid to the pump and an outlet connection for supplying liquid pressure pulses from the pump to an oral hygiene device.
  • one end of the plunger-core forms a piston which reciprocates in a cylinder, and valve means cooperates with the piston and cylinder to form the pump.
  • the pressure pulses are supplied to an oral hygiene device such as a water jet of an hydraulically operated toothbrush.
  • the plunger-core and elastic means are designed so that the no-load mechanical resonant frequency of the reciprocating :system is substantially higher than the frequency of the current pulses applied to the coil of the electromagnetic circuit, and predetermined to yield an approximately constant amplitude of reciprocation for the various loads encountered in normal use. In one particular embodiment a no-load resonant frequency about 10 hertz higher than the applied pulse frequency was found satisfactory.
  • the construction and simplicity of the pump of the invention permits convenient embedding in an insulating material of the energizing coil and all components carrying an electric current, thereby eliminating danger to the user in case water enters the casing or the pump is accidentally dropped into water.
  • FIG. l is a front view of a specific embodiment of the invention.
  • FIG. 2 is an axial cross section ofthe embodiment of FIG. 1;
  • FIG. 3 represents schematically the mechanical resonance curves in idle running and under two different loads.
  • FIGS. 1 and 2 represent an electromagnetic pump including a cylindrical electromagnet with an oscillating plunger-core l which works as a piston elastically mounted by means of a return spring 2, the spring being fixed on-the one hand on the flange 10 and on the other to the plunger-core 1.
  • the electromagnet comprises a metallic core 3 and a coil 4 overmolded with a magnetic switch 5.
  • the latter is constituted by a pair of magnetizable electric contacts enclosed in a bulb and controllable from outside by means of a permanent magnet 13 movable by a control knob (not shown).
  • a diode 6, a silicon diode for example, is also molded into the thermoplastic or thermosetting insulating material, constituted for example of epoxy resin, which also protects the connections of the supply cord 20.
  • the core 3 conducts the magnetic flux of the coil 4 ⁇ . This flux is closed by the plunger-core l.
  • THe core 3 consists of a rear flange 8, which guides the plunger-core 1 through a bearing 9, a front flange l0 separated from the plunger-core 1 by an air gap, and an external framework 11 provided with cooling ribs. All these components of the metallic core, as well as the plunger-core l, are slotted in order to avoid excessive heating caused by Foucault currents.
  • a pump 7 On the flange 10 a pump 7 is mounted. It comprises a body 14, an inlet valve 15 and a pressure control shaft 116 limiting the motion of the inlet valve 15, thus preventing the valve from coming back on its seat and thereby regulating the pressure.
  • the liquid to be pumped comes out of a reservoir (not shown), as indicated at A, and is supplied through coupling 19 to the interior of the pump.
  • Pressure pulses pass out of the pump as indicated at S, through a coupling 17.
  • the pump piston is an integral part of the plunger-core 1 and includes a ring 18 which provides a watertight seal with the pump cylinder.
  • piston pump instead of the piston pump specifically shown, it would be possible to use other types of pumps, such as diaphragm pumps or the like, driven by the plunger-core.
  • a current pulse going through the coil 12 creates a magnetic field which tends to close, thereby driving the plungercore in one direction towards the pump and compressing the spring 2.
  • the magnetic flux ceases and the restoring force provided by spring 2 drives back the plunger-core 1 towards the rear part.
  • the plunger-core overpasses its rest position due to its kinetic energy, thereby placing the spring in tension and drawing the core back toward its rest position.
  • This assembly constitutes an oscillating mechanical system.
  • the spring can be replaced by any other elastic element such as blades, use of rubber, etc.
  • the oscillating motion frequency given to the plunger-core is equal to that of the alternating current frequency, i.e., to the mains frequency of 50 to 60 hertz, because alternate half-cycles are suppressed by the diode 6, which is connected in series with the coil.
  • the oscillating system which is composed of the plunger-core, the spring, and the portion of the pump driven by the plunger-core, is built in such a way that the change in resonance frequency of the system between idle running or no-load condition and the maximum load condition is in the range of about hertz.
  • the system is tuned to a frequency of about 10 hertz abovethe network frequency to which is connected, and consequently the oscillation amplitude is less than would be produced if the system were tuned to the network frequency.
  • FIG. 3 represents those resonance curves.
  • the abscissa is the frequency f and the ordinate is the oscillating amplitude 1.
  • Curve 1 corresponds to the operation of the device under idle running or no-load condition; curve 2 to the utilization of the device under an intermediate load condition, for example, oral washing; and curve 3 to the utilization of the device under a higher load condition, for example for a toothbrush.
  • the quantity f represents the frequency of the network or power mains, and f represents the resonance frequency of the oscillating mechanical circuit under idle running or no-load condition, which is 10 hertz above the network frequency.
  • the device Since the energizing coil, as well as the reed switch and the diode, are overmolded in plastic insulating material, the device has an absolute watertightness. Also the device operates quietly and satisfactorily while at the same time being simple and compact.
  • the piston is an integral part of the oscillating plunger-core and there is only one movable part, thereby re ucmg friction and wear and tear to a strict minimum.
  • Such a construction is moreover of great manufacturing and mounting simplicity, and its cost price is all the lower.
  • An electromagnetic pump for supplying liquid pressure pulses to oral hygiene devices imposing different loads thereon which comprises a. a reciprocally mounted plunger-core including a plunger and a core of magnetic material united therewith,
  • an electromagnetic circuit including a coil for driving said plunger-core in one direction
  • said pump including inlet and outlet connections for respectively supplying liquid to said pump and liquid pressure pulses from said pump to a said oral hygiene device,
  • said plunger-core and elastic means having a no-load mechanical resonant frequency substantially higher than the frequency of said pulses and predetermined to yield an approximately constant amplitude of reciprocation for different loads imposed on said pump by oral hygiene devices connected thereto.
  • An electromagnetic pump according to claim 1 in which one end of said pump forms a piston, and including a cylinder in which said piston reciprocates and valve means cooperating with said piston and cylinder to form said pump.
  • An electromagnetic pump according to claim 1 including means for deriving said current pulses from a 50 or 60 hertz power line frequency, said mechanical resonant frequency being about 10 hertz higher than said power line frequency.
  • An electromagnetic pump according to claim 1 in which the amplitude of reciprocation as a function of frequency of applied current pulses exhibits a resonant peak characteristic, said resonant peak decreasing in frequency and magnitude from said no-load resonant frequency to said constant frequency as the load imposed on said pump increases.

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Dentistry (AREA)
  • Epidemiology (AREA)
  • Engineering & Computer Science (AREA)
  • Animal Behavior & Ethology (AREA)
  • Water Supply & Treatment (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Brushes (AREA)
  • Electromagnetic Pumps, Or The Like (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
  • Reciprocating Pumps (AREA)
US885221A 1968-12-13 1969-12-15 Device for body care Expired - Lifetime US3635593A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1857368A CH501405A (fr) 1968-12-13 1968-12-13 Appareil pour l'obtention d'un jet pulsé pour soins corporels

Publications (1)

Publication Number Publication Date
US3635593A true US3635593A (en) 1972-01-18

Family

ID=4433902

Family Applications (1)

Application Number Title Priority Date Filing Date
US885221A Expired - Lifetime US3635593A (en) 1968-12-13 1969-12-15 Device for body care

Country Status (3)

Country Link
US (1) US3635593A (fr)
CH (1) CH501405A (fr)
DE (1) DE1962087C3 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5093498U (fr) * 1973-12-25 1975-08-06
US6250895B1 (en) * 1998-08-11 2001-06-26 Matsushita Electric Industrial Co., Ltd. Linear compressor
US20130015930A1 (en) * 2011-07-14 2013-01-17 Abb Technology Ag Fast switch with non-circular thomson coil

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2544534C3 (de) * 1975-10-04 1981-03-19 Kuno Moser, GmbH, Fabrik für Feinmechanik und Elektrotechnik, 7731 Unterkirnach Spritzvorrichtung zur Reinigung und Pflege von Zähnen und Zahnfleisch
DE3711484A1 (de) * 1987-04-04 1988-10-20 Braun Ag Betaetigungseinrichtung fuer ein elektrisches geraet

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1446511A (en) * 1922-02-23 1923-02-27 Hydraulic Press Mfg Co Pump unloader
US2481147A (en) * 1947-09-18 1949-09-06 Bendix Aviat Corp Reciprocating electromagnetic motor
US2630345A (en) * 1951-05-18 1953-03-03 Gilbert & Barker Mfg Co Pressure control for electromagnetically operated reciprocating piston pumps
US3381616A (en) * 1966-07-13 1968-05-07 Bendix Corp Electromagnetic fluid pump

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1446511A (en) * 1922-02-23 1923-02-27 Hydraulic Press Mfg Co Pump unloader
US2481147A (en) * 1947-09-18 1949-09-06 Bendix Aviat Corp Reciprocating electromagnetic motor
US2630345A (en) * 1951-05-18 1953-03-03 Gilbert & Barker Mfg Co Pressure control for electromagnetically operated reciprocating piston pumps
US3381616A (en) * 1966-07-13 1968-05-07 Bendix Corp Electromagnetic fluid pump

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5093498U (fr) * 1973-12-25 1975-08-06
US6250895B1 (en) * 1998-08-11 2001-06-26 Matsushita Electric Industrial Co., Ltd. Linear compressor
US20130015930A1 (en) * 2011-07-14 2013-01-17 Abb Technology Ag Fast switch with non-circular thomson coil
US8791779B2 (en) * 2011-07-14 2014-07-29 Abb Technology Ag Fast switch with non-circular Thomson coil

Also Published As

Publication number Publication date
DE1962087C3 (de) 1981-08-27
DE1962087B2 (de) 1980-10-30
CH501405A (fr) 1971-01-15
DE1962087A1 (de) 1970-07-16

Similar Documents

Publication Publication Date Title
US4141352A (en) Oral hygiene appliance
US4108167A (en) Dental syringe
US4607627A (en) Solenoid-actuated hygienic appliance
US4229634A (en) Insulated switch arrangement for electric motor
US4094311A (en) Dental syringe
US5261792A (en) Reverse osmosis water purifier booster pump system
US5321865A (en) Oral hygiene device
US3578884A (en) Oral hygiene apparatus
US3178754A (en) Electric toothbrush
US4832582A (en) Electric diaphragm pump with valve holding structure
US3635593A (en) Device for body care
US3201670A (en) Reciprocating electromagnetic mechanism
US1945616A (en) Dental device
US3878577A (en) Valve arrangement for an hydraulically operated hand appliance for personal hygiene
MXPA03002519A (es) Dispositivo de bombeo.
US3551931A (en) Hydraulic motor driven toothbrush
US20230383737A1 (en) Sucking and air blowing structure and massaging device
GB1256792A (fr)
CN217040377U (zh) 一种微型泵及冲牙器
GB1478473A (en) Liquid-jet hand appliance for personal hygiene
US3664767A (en) Pumping apparatus
CN216812044U (zh) 一种冲牙器泵
US3585669A (en) Hydraulically-operated toothbrush
CN216455423U (zh) 冲牙器工作机构
CN114469414B (zh) 一种微型泵及冲牙器