EP2850323A1 - Pompe à déplacement positif à amorçage automatique, alimentée par pile, légère et compacte - Google Patents

Pompe à déplacement positif à amorçage automatique, alimentée par pile, légère et compacte

Info

Publication number
EP2850323A1
EP2850323A1 EP13791209.3A EP13791209A EP2850323A1 EP 2850323 A1 EP2850323 A1 EP 2850323A1 EP 13791209 A EP13791209 A EP 13791209A EP 2850323 A1 EP2850323 A1 EP 2850323A1
Authority
EP
European Patent Office
Prior art keywords
assembly
positive displacement
displacement pump
pump
self
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Withdrawn
Application number
EP13791209.3A
Other languages
German (de)
English (en)
Other versions
EP2850323A4 (fr
Inventor
Michael H. Irving
Jeffrey B. Schopperle
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.)
Flow Control LLC
Original Assignee
Flow Control LLC
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 Flow Control LLC filed Critical Flow Control LLC
Publication of EP2850323A1 publication Critical patent/EP2850323A1/fr
Publication of EP2850323A4 publication Critical patent/EP2850323A4/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/06—Control using electricity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/007—General arrangements of parts; Frames and supporting elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F04B17/06—Mobile combinations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/06—Control using electricity
    • F04B49/065—Control using electricity and making use of computers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C11/00—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations
    • F04C11/008—Enclosed motor pump units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
    • F04C14/28—Safety arrangements; Monitoring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/30—Casings or housings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/80—Other components
    • F04C2240/81—Sensor, e.g. electronic sensor for control or monitoring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2270/00—Control; Monitoring or safety arrangements
    • F04C2270/80—Diagnostics

Definitions

  • This invention relates to a pump; and more particularly, relates to a compact, lightweight, battery operated, self-priming, positive displacement pump.
  • the pumping devices that are known in the art are larger units with heavy 15 batteries.
  • the present invention may take the form of apparatus including a compact, lightweight, battery operated, self-priming, positive 25 displacement pump that has a combination of
  • a positive displacement pump assembly including a diaphragm pump, configured in the elongated housing, and configured to respond to a motor assembly drive torque, to self-prime, and to pump fluid from an input port to an output port; a motor assembly configured in the elongated housing and configured to respond to signaling and provide the motor assembly drive torque;
  • a pump control interconnect assembly configured in the elongated housing, and configured to provide the signaling to control the operation of the motor assembly by current based on run dry mode or over current, by time based on a timer set to run for a given amount of time, by voltage based on over/under voltage, or some combination thereof;
  • a rechargeable battery housing/assembly configured to respond to recharging signaling and configured with a rechargeable DC power supply and power control module for providing inrush, overcharging, over-discharging, short circuit, over current protection, or some combination thereof.
  • the present invention may include one or more of the following features:
  • the apparatus may further include a charging base configured to receive an end of the compact, lightweight, battery operated, self-priming, positive displacement pump and to provide the recharging signaling to the rechargeable battery.
  • the housing may be configured with two pieces that seal together to form at least an IPX4 water resistant rating.
  • the pump control interconnect assembly may be configured to provide and implement the inrush, overcharging, over-discharging, short circuit and over protection current.
  • the apparatus comprises a retention clip configured to allow the compact, lightweight, battery operated, self-priming, positive displacement pump to be held on a belt or a toolbox.
  • the motor assembly may be configured with a power switch assembly to turn the motor assembly on and off.
  • the power control functionality may include voltage cutoff and switching functionality.
  • the input port and the output port may include a quick connect input port and a quick connect output port to allow the compact, lightweight, battery operated, self- priming, positive displacement pump to have multiport port configurations.
  • the quick connect input and output ports may be configured along an axis substantially transverse to the longitudinal axis of the elongated housing.
  • the positive displacement pump assembly may be, or take the form of, a diaphragm pump assembly.
  • in-line is under at least to mean “having the parts, items or components substantially arranged in a straight line along the longitudinal axis L
  • the term “lightweight” is understood at least to mean “one of less than average weight,” especially when compared to other similar positive displacement pumps in its class, e.g., pumps having substantially the same pumping power, including when measured in gallons per minute (GPM).
  • the term “compact” is understood at least to mean “having a dense structure, parts, items, or units closely packed or joined,” especially when compared to other similar positive displacement pumps in its class, e.g., pumps having substantially the same pumping power, including when measured in gallons per minute (GPM).
  • Figure 1 shows a top perspective view of a positive displacement pump shown without a -top cover, according to some embodiments of the present invention.
  • Figure 2a shows a top perspective view of a charging base for the positive displacement pump shown in Figure 1 , according to some embodiments of the present invention.
  • Figure 2b shows an exploded view of the charging base shown in Figure 2a, according to some embodiments of the present invention.
  • Figure 3a shows a bottom perspective view of an arrangement that includes a diaphragm pump assembly, a pump control printed circuit board assembly (PCBA) and a rechargeable battery housing /assembly for a positive displacement pump shown in Figure 1 , according to some embodiments of the present invention.
  • PCBA pump control printed circuit board assembly
  • Figure 3b shows a top perspective view of the arrangement shown in Figure 3a, according to some embodiments of the present invention.
  • Figure 4a shows a bottom frontal perspective view of a positive displacement pump without a bottom cover, according to some embodiments of the present invention.
  • Figure 4b shows a bottom backwards perspective view of a positive displacement pump without a bottom cover, according to some embodiments of the present invention.
  • Figure 5a shows a longitudinal cross-sectional view of a positive displacement pump, along a top-to-bottom plane orthogonal to the longitudinal axis, according to some embodiments of the present invention.
  • Figure 5b shows a longitudinal side-to-side cross-sectional view of a positive displacement pump, along a side-to-side plane orthogonal to the longitudinal axis, according to some embodiments of the present invention.
  • the present invention is a positive displacement pump that utilizes a rechargeable battery pack and is self-priming, and able to generate pressure.
  • the pump includes the following items/elements that are labeled in the Figures below: Item #1 : Rechargeable battery housing/assembly configured with a power supply and a power control module for inrush, overcharging, over-discharging, short circuit and over current protection.
  • Rechargeable batteries configured with a power supply are known in the art, and the present invention is not intended to be limited to any particular type or kind thereof either now known or later developed in the future.
  • Techniques for inrush, overcharging, over-discharging, short circuit and over current protection are known in the art, and the present invention is not intended to be limited to any particular type or kind thereof either now known or later developed in the future.
  • PCPCB Pump control printed circuit board
  • the PCPCB 2 could also be used to control the pumping unit by current (run dry mode or over current), time (timer set to run XX secs/minutes), voltage (over voltage/under voltage) and other types or kinds control functions either now known or later developed in the future.
  • current run dry mode or over current
  • time timer set to run XX secs/minutes
  • voltage over voltage/under voltage
  • Techniques for controlling voltage cut-off and switching are known in the art, and the present invention is not intended to be limited to any particular type or kind thereof either now known or later developed in the future.
  • PCPCB for controlling the pumping unit by current (run dry mode or over current), time (timer set to run XX secs/minutes), voltage (over voltage/under voltage) and other types or kinds .
  • control functions are known in the art, based at least partly on, and consistent with, that disclosed herein.
  • Item #3 Power switch assembly configured as an On/Off switch to turn the positive displacement switch on/off.
  • Power switch assemblies like element 2 are known in the art, and the present invention is not intended to be limited to any particular type or kind thereof either now known or later developed in the future.
  • Diaphragm pump assembly e.g., including a diaphragm pump that consists of, or is configured with, a pump head labeled A, a pressure switch labeled B and a motor assembly labeled C.
  • Diaphragm pump assemblies like element 4 are known in the art, and the present invention is not intended to be limited to any particular type or kind thereof either now known or later developed in the future. Moreover, a person skilled in the art without undue experimentation would be able to implement such a diaphragm pump assembly like element 4, based at least partly on, and consistent with, that disclosed herein.
  • Item #5 Retention clip configured to allow the overall pumping unit or positive displacement pump to be simply held on a belt or tool box, etc.
  • Plastic bottom/middle housing cover or portion, top/front housing cover or portion and battery cover or portion e.g., configured with a four part constructions, including the top housing cover or portion 8, a battery housing cover or portion 9, the bottom/middle housing cover or portion 6 and a top/middle housing cover or portion 6' (see Figures 4a and 4b).
  • Embodiment are envisioned, and the scope of the invention is intended to include, using other types or kinds of housing configurations, e.g., including a two part housing construction 5 having either a combination of a front half housing cover or portion and a back half housing cover or portion, or an alternative combination of a top half housing cover or portion and a bottom half housing cover or portion.
  • a two part housing construction 5 having either a combination of a front half housing cover or portion and a back half housing cover or portion, or an alternative combination of a top half housing cover or portion and a bottom half housing cover or portion.
  • Item #7, #7' Quick connect ports on the pump allow for the pumping unit or positive displacement pump to have multiple port configurations, including an input i o port and an output port.
  • Charging base configured to receive the positive displacement pump and recharge the rechargeable battery 1.
  • the charging base may be configured as a two-part construction having a an upper charging based portion 10a and a lower charging base portion 10b.
  • Charging bases like
  • the positive displacement pump or pumping unit may be
  • This 4-part plastic housing configuration may be configured to enclose the battery 1 ; pump control 5 PCBA 2; and the diaphragm pump assembly 4, which consists of the pressure switch 4A, the pump housing 4B and the motor assembly 4C, as shown.
  • the pressure switch 4C may be capped with the top/front housing 8.
  • the battery housing/assembly 1 may be configured to be over-molded with a durable material. The battery housing/assembly 1 may be charged in the charging base 10.
  • the power from the battery 1 may be sent to the motor assembly 4C through the pump control PCBA 2, which received on/off signals from the power switch 3, and then passes power to the motor assembly 4C.
  • the pump control PCBA 2 may be configured to contain a microprocessor or processor that can provide and implement the variety of functions set forth above.
  • the compact, lightweight, rechargeable, battery operated, self-priming, positive displacement utility pump can be stored in a tool box, tool belt, belt.
  • the compact, lightweight, rechargeable, battery operated, self-priming, positive displacement utility pump can be used in small confined spaces or, due to the self- priming ability, can be located remotely from a work area and a hose placed in the fluid can be drawn from a source and pumped.
  • the pump is a positive displacement pump that can pump fluid long distances and generate head pressure, allowing it to be used as a sprayer to rinse areas.
  • Figures 1 - 5b are also understood to include items, parts and/or components that are not described in detail and not labeled since they do not form part of the underlying invention, including screws and fasteners for coupling, e.g., the housing items, parts or components 6, 6', 8 and 9 together, or the pressure switch 4A and the pump housing 4B together; suitable wiring for providing signaling and power between items, parts or components, e.g., the rechargeable battery 1 , the pump control PCBA 2 and the motor assembly 4C; items, parts or components for rotational coupling the motor assembly 4C and diaphragm pump that forms part of the diaphragm pump assembly 4; etc.
  • the present invention may take the form of apparatus including a compact, lightweight, battery operated, self-priming, positive displacement pump as shown in Figures 1 - 5b that features the combination of the following:
  • the positive displacement pump or pump assembly including a diaphragm pump (see element 4B re the diaphragm pump contained in pump housing 4B), configured in the elongated housing 6, 6', 8, 9, and configured to respond to a motor assembly drive torque, to self-prime, and to pump fluid from the input port to the 15 output port;
  • a diaphragm pump see element 4B re the diaphragm pump contained in pump housing 4B
  • the motor assembly 4C configured in the elongated housing 6, 6', 8, 9 and configured to respond to signaling and provide the motor assembly drive torque
  • the pump control interconnect assembly 2 configured in the elongated housing 6, 6', 8, 9, and configured to provide the signaling to control the operation of 20 the motor assembly 4C by current based on run dry mode or over current, by time based on a timer set to run for a given amount of time, by voltage based on over/under voltage, or some combination thereof
  • the rechargeable battery housing/assembly 1 configured to respond to recharging signaling and configured with a rechargeable DC power supply and power control module for providing the inrush, overcharging, over-discharging, short circuit, over current protection, or some combination thereof.
  • the positive displacement pump assembly, the motor assembly, the pump control interconnect assembly and the rechargeable battery housing/assembly may all be configured in-line with (or along) the longitudinal axis L ax i S of the elongated housing 6, 6', 8, 9 so that the compact, lightweight, battery operated, self-priming, positive displacement pump may be configured and dimensioned to be easily and conveniently stored in a toolbox or a pouch of a tool belt.
  • PCBs Pump Control PCBs 2 and Associated Signal Processor Printed circuit boards (PCBs) are known in the art, and the scope of the invention is not intended to be limited to any particular type or kind thereof either now known or later developed in the future for implementing the runtime functionality of the present invention.
  • the functionality of the pump control PCB 2, the associated signal processor, and any associated signal processing may be implemented using hardware, software, firmware, or a combination thereof, although the scope of the invention is not intended to be limited to any particular embodiment thereof.
  • the signal processor may take the form of one or more microprocessor-based architectures having a processor or microprocessor, a random and/or read only access memory (RAM/ROM), where the RAM/ROM together forming at least part of the memory, input/output devices and control, data and address buses connecting the same.
  • RAM/ROM random and/or read only access memory
  • the scope of the invention is not intended to be limited to any particular implementation using technology either now known or later developed in the future. Moreover, the scope of the invention is intended to include the signal processor being a stand alone module, or in some combination with other circuitry for implementing another module. Moreover still, the scope of the invention is not intended to be limited to any particular type or kind of signal processor used to perform the signal processing functionality, or the manner in which the computer program code is programmed or implemented in order to make the signal processor operate. A person skilled in the art without undue experimentation would appreciate and understand how to develop or write a suitable software program or algorithm for running on such a pump control PCB so as to implement the functionality set forth herein.
  • the pump control PCB like element 2 and the associated signal processor may include one or more other sub-modules for implementing other functionality that is known in the art, but does not form part of the underlying invention per se, and is not described in detail herein.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Reciprocating Pumps (AREA)
  • Rotary Pumps (AREA)

Abstract

L'invention porte sur une pompe à déplacement positif à amorçage automatique, alimentée par pile, légère et compacte, qui comprend une combinaison d'un boîtier allongé ayant un axe longitudinal ; un ensemble pompe à déplacement positif monté dans le boîtier allongé et conçu pour répondre à un couple d'entraînement d'un ensemble moteur, pour réaliser l'amorçage automatique, et pour pomper un fluide d'un orifice d'entrée à un orifice de sortie ; un ensemble moteur placé dans le boîtier allongé et conçu pour répondre à un signal et développer le couple d'entraînement de l'ensemble moteur ; un ensemble raccord de commande de pompe placé dans le boîtier allongé et conçu pour émettre le signal servant à commander le fonctionnement de l'ensemble moteur par le courant basé sur le mode de marche à sec.
EP13791209.3A 2012-05-16 2013-05-16 Pompe à déplacement positif à amorçage automatique, alimentée par pile, légère et compacte Withdrawn EP2850323A4 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201261647694P 2012-05-16 2012-05-16
PCT/US2013/041335 WO2013173573A1 (fr) 2012-05-16 2013-05-16 Pompe à déplacement positif à amorçage automatique, alimentée par pile, légère et compacte

Publications (2)

Publication Number Publication Date
EP2850323A1 true EP2850323A1 (fr) 2015-03-25
EP2850323A4 EP2850323A4 (fr) 2016-02-17

Family

ID=49581442

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13791209.3A Withdrawn EP2850323A4 (fr) 2012-05-16 2013-05-16 Pompe à déplacement positif à amorçage automatique, alimentée par pile, légère et compacte

Country Status (4)

Country Link
US (1) US20130309099A1 (fr)
EP (1) EP2850323A4 (fr)
CN (1) CN104520590A (fr)
WO (1) WO2013173573A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016191731A1 (fr) 2015-05-27 2016-12-01 Flow Control Llc. Pompe à cartouche
US20170095757A1 (en) 2015-05-27 2017-04-06 Flow Control LLC Cartridge Accumulator
CN105864056A (zh) * 2016-05-27 2016-08-17 林振机 电池与水泵主体合为一体的水泵装置
US11811243B2 (en) 2019-04-30 2023-11-07 Alloy Energy Solutions Inc. Modular, mobile power system for equipment operations, and methods for operating same
TWI696759B (zh) * 2019-07-25 2020-06-21 秦祖敬 空氣抽取裝置及其抽取剩餘時間計算方法

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JPS514603A (fr) * 1974-07-02 1976-01-14 Mabuchi Motor Co
JPS5963396A (ja) * 1982-10-04 1984-04-11 M K Seikou Kk 乾電池式電動ポンプ
US5472317A (en) * 1994-06-03 1995-12-05 Minimed Inc. Mounting clip for a medication infusion pump
DE9412640U1 (de) * 1994-08-05 1995-12-07 Hoesch Metall + Kunststoffwerk GmbH & Co, 52372 Kreuzau Hydromassageeinrichtung zur Verwendung in einer Badewanne
US5727417A (en) * 1995-09-22 1998-03-17 Greenlee Textron Inc. Portable battery powered crimper
JPH10151148A (ja) * 1996-11-26 1998-06-09 Matsushita Electric Works Ltd 洗浄装置
US6290469B1 (en) * 1997-05-13 2001-09-18 Frank E. Archibald Hand held, self-powered pump
US7157882B2 (en) * 2002-11-22 2007-01-02 Milwaukee Electric Tool Corporation Method and system for battery protection employing a selectively-actuated switch
US7176654B2 (en) * 2002-11-22 2007-02-13 Milwaukee Electric Tool Corporation Method and system of charging multi-cell lithium-based batteries
DE102006023188A1 (de) * 2005-05-17 2007-01-11 Milwaukee Electric Tool Corp., Brookfield Elektrowerkzeug, Batterie, Ladegerät und Verfahren zu deren Betrieb
DE102007038555A1 (de) * 2007-08-16 2009-02-19 Hilti Aktiengesellschaft Elektrohandwerkzeuggerät
US8439651B2 (en) * 2009-07-14 2013-05-14 Briggs & Stratton Corporation Garden hose booster water pump system
US20100303654A1 (en) * 2009-05-26 2010-12-02 Garden Green Ecosolutions, Llc Portable,Solar Rechargeable Water Pumping System
US8516642B1 (en) * 2012-02-21 2013-08-27 King Fahd University Of Petroleum And Minerals Curved-head electric toothbrush

Also Published As

Publication number Publication date
EP2850323A4 (fr) 2016-02-17
CN104520590A (zh) 2015-04-15
WO2013173573A1 (fr) 2013-11-21
US20130309099A1 (en) 2013-11-21

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