US3585669A - Hydraulically-operated toothbrush - Google Patents

Hydraulically-operated toothbrush Download PDF

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Publication number
US3585669A
US3585669A US861971A US3585669DA US3585669A US 3585669 A US3585669 A US 3585669A US 861971 A US861971 A US 861971A US 3585669D A US3585669D A US 3585669DA US 3585669 A US3585669 A US 3585669A
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US
United States
Prior art keywords
piston
shaft
plunger
slot
toothbrush
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
US861971A
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English (en)
Inventor
Michel A Moret
Pierre J Jousson
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.)
INSTITUT DE RECHERCHE WOOG
WOOG INST RECH
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WOOG INST RECH
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 WOOG INST RECH filed Critical WOOG INST RECH
Application granted granted Critical
Publication of US3585669A publication Critical patent/US3585669A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B13/00—Brushes with driven brush bodies or carriers
    • A46B13/02—Brushes with driven brush bodies or carriers power-driven carriers
    • A46B13/04—Brushes with driven brush bodies or carriers power-driven carriers with reservoir or other means for supplying substances
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C17/00—Devices for cleaning, polishing, rinsing or drying teeth, teeth cavities or prostheses; Saliva removers; Dental appliances for receiving spittle
    • A61C17/16—Power-driven cleaning or polishing devices
    • A61C17/22—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like
    • A61C17/32—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like reciprocating or oscillating
    • A61C17/38—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like reciprocating or oscillating driven by hydraulic motor, e.g. water motor
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/18—Mechanical movements
    • Y10T74/18568—Reciprocating or oscillating to or from alternating rotary

Definitions

  • a hydraulically-operated toothbrush has a piston arranged to be reciprocated by pulsating liquid.
  • a shaft for carrying a toothbrush head is mounted for rotational oscillation.
  • a coupling between the piston and the shaft oscillates the shaft at a multiple of the reciprocating frequency of the piston.
  • One specific coupling is a pin and slot connection wherein the slot has successive sections extending in opposite angular directions.
  • Another uses a plunger to oscillate the shaft, and the piston has an arm which reciprocates the plunger directly during a portion of its cycle, and through additional means such as a rock ing lever during another portion of its cycle.
  • Hydraulically-operated toothbrushes are now available which, when connected to the pump unit of a water jet apparatus, provide a tooth'brushing action similar to that of an electric toothbrush.
  • the frequency of oscillation or reciprocation of the brush head is the same as the frequency of the pulsating liquid from the pump unit.
  • the water pressure varies from a low pressure (say, about zero) to a maximum pressure at a frequency in the range of about 700 to 1250 pulsations per minute. Such frequencies are too low for efiicient brushing of the teeth. For a toothbrush, frequencies of at least about 2400 per minute are desirable.
  • the present invention provides a hydraulically-operated toothbrush for actuation by pulsating liquid in which the frequency of oscillation of the toothbrush head is a mul tiple of the frequency of the pulsating liquid. This permits more efficient toothbrushing to be obtained, while at the same time allowing the use of pump units associated with conventional water jet apparatus.
  • a reciprocating piston is provided which is driven by pulsating liquid from a suitable pump or other appropriate source, and coupling means are provided between the piston and the toothbrush shaft for rotationally oscillating the shaft at a fre- 3,585,669 Patented June 22, 1971 quency which is a multiple of the reciprocating frequency of the piston.
  • the coupling means includes a pin and slot connection, and the slot has at least two successive sections extending in opposite angular directions so that the toothbrush shaft is rotated successively in opposite directions upon movement of the piston in one direction. This action takes place for both forward and reverse strokes of the piston, thereby giving the desired frequency multiplication.
  • a plunger is coupled to the toothbrush shaft so that reciprocation of the plunger causes rotational oscil lation of the shaft.
  • the reciprocating piston is provided with an arm which reciprocates the plunger directly during a portion of its cycle, and through additional means such as a rocking lever during another portion of its cycle, thereby producing two reciprocations of the plunger for each reciprocation of the piston.
  • FIG. 1 is an overall View of a hydraulically-operated toothbrush in accordance with the invention
  • FIG. 2 is a longitudinal cross-section of the toothbrush in FIG. 1;
  • FIG. 3 is a detail of the pin and slot coupling of FIG. 2;
  • FIG. 4 is a longitudinal cross-section of another embodiment of the invention.
  • FIG. 5 is a detail showing the pin and slot connection of FIG. 4.
  • FIGS. 6, 7 and 8 are cross-sections taken along the lines 66, 77 and 88 of FIG. 4.
  • the toothbrush includes a casing forming a handle, generally designated as 10, and a toothbrush head 11 removably attached to shaft 12 in any desired manner, such as by a pin and slot connection.
  • Pulsating liquid from a suitable source such as the pump unit of a pulsating water jet device is supplied to the toothbrush through tube 13.
  • a piston chamber 14 in which piston 15 is mounted for reciprocation.
  • An inlet fitting 16 is provided at one end of the pis ton chamber and is arranged for convenient connection to supply tube 13.
  • Suitable sealing means such as an O-ring 17 is provided at the other end of the piston chamber.
  • a compression spring 18 resiliently biases the piston toward the inlet 16. Consequently, as the liquid pressure increases in chamber 14, the piston 15 is driven toward the left, and as the pressure decreases the spring 18 urges the piston toward the right, thereby reciprocating the piston at the frequency of the pulsations in the liquid supply to inlet 16.
  • the piston 15 has a rod element 19 attached thereto or integral therewith.
  • a transverse pin 21 is affixed in the end of the rod and rides in slot 22 of a tube element 23 encircling the rod.
  • Shaft 12 is aflixed in the end of tube element 23.
  • slot 22 has two successive sections 22' and 22.” which extend partially around the tube element 23 in opposite peripheral directions.
  • the axial extent of the slot is at least equal to the axial extent of travel of rod 19 and pin 21. Consequently, as rod 19 moves in one direction, say to the left, the pin 21 first engages the wall of slot section 22' to rotate tube 23 in one direction, and then engages the wall of slot section 22 to rotate tube 23 in the opposite direction. The reverse takes place as rod 19 returns to its initial position. Accordingly, each reciprocation of the piston to which rod 19 is attached causes two rotational oscillations of tube 23, and consequently two oscillations of shaft 12 which carries the toothbrush head 11.
  • the slot 22 could have three or more sections successively extending in opposite directions so as to increase the multiplying factor between reciprocation of rod 19 and rotational oscillation of tube 23.
  • the functioning of the rod and tube element could be interchanged. That is, the tube element could be arranged to be reciprocated by piston 15 and the rod element could be attached to or form a part of shaft 12.
  • FIG. 4 a piston arrangement is shown similar to that of FIG. 2 and the components are desig nated by the same numbers.
  • a piston arm 31 is attached to the inner end of piston 15 and moves therewith.
  • a slot 32 is provided in the piston arm and receives one arm of a rocking lever 33- pivoted in the casing at 34.
  • a plunger 35 having an actuating head 36 is mounted for reciprocation in the casing and is resiliently biased to ward the right by compression spring 37.
  • the movement of plunger head 36 toward the right is limited by the face 38' of a cross bar 38 of the casing.
  • a sliding pin 39 is located between plunger head 36 and the upper arm of rocking lever 33.
  • a slot 41 allows free movement of the upper arm.
  • a transverse pin 42 is mounted at the end of plunger 35 and rides in a slot 43 in tube element 44.
  • Shaft 12 is attached to tube element 42 in a manner similar to that of FIG. 2.
  • slot 43 extends partially around tube element 44 in only one peripheral direction. so that each reciprocation of plunger 35 causes a single oscillation of tube 44 and the attached shaft 12.
  • rocking lever 33 rotates clockwise by virtue of the force of compression spring 37 acting on plunger head 36 and pin 39.
  • Plunger head 36 moves toward face 38'.
  • the plunger head 36 is substantially there.
  • the front end 31 thereof bears against plunger head 36 and forces it forward against the compression of spring 37.
  • the plunger head 36 will be in the position shown. However, inasmuch as the lower arm of rocking lever 33 will then be at the rear of slot 32, no force will be transmitted through the rocking lever and pin 39 to the plunger head.
  • the plane of face 38' is midway between the forward and rear positions of the face of the front end 31 of the piston arm. Hence when end 31' is forward of plane 38' it directly engages plunger head 36 to cause reciprocation thereof. When end 31 is rearward of plane 38', an additional reciprocation is produced by rocking lever 33.
  • the slot arrangement shown in FIG. 3 could be employed in the embodiment of FIG. 4 so as to provide a further multiplying factor.
  • a hydraulically-operated toothbrush for actuation by pulsating liquid which comprises (a) a casing forming a handle,
  • said coupling means includes a pin and slot connection, said slot having at least two successive sections extending in opposite angular directions to rotate said shaft in successively opposite directions upon movement of said piston in one direction.
  • said coupling means includes a rod element encircled by a tube element, one of said elements being connected for reciprocation by said piston and the other being connected for rotationallyoscillating said shaft, said tube element having a slot therein and said rod element having a transverse pin riding in said slot, said slot having an axial extent at least equal to the axial extent of travel of said one element and having at least two successive sections extending partially around the tube element in opposite peripheral directions.
  • said coupling means includes (a) a plunger mounted for reciprocation in said casing and having an actuating head,
  • said 5 FOREIGN PATENTS piston arm has a slot thereln for receiving one arm of 471,560 6/1969 Switzerland 15 22(R) said rocking lever, and including a pin positioned between the other arm of the rocking lever and said plunger head, the forward end of said slot engaging said one arm EDWARD ROBERTS Primary Examiner and said other arm engaging said pin during said move- 10 U S C1 X R ment of the piston arm from midway torear positions thereof to drive said plunger forwardly.

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  • Health & Medical Sciences (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)
  • Brushes (AREA)
US861971A 1968-10-03 1969-09-29 Hydraulically-operated toothbrush Expired - Lifetime US3585669A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1480168A CH497153A (fr) 1968-10-03 1968-10-03 Appareil pour hygiène buccale

Publications (1)

Publication Number Publication Date
US3585669A true US3585669A (en) 1971-06-22

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Family Applications (1)

Application Number Title Priority Date Filing Date
US861971A Expired - Lifetime US3585669A (en) 1968-10-03 1969-09-29 Hydraulically-operated toothbrush

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US (1) US3585669A (fr)
CH (1) CH497153A (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3919922A (en) * 1971-01-07 1975-11-18 Pulsepower Systems Modular liquid propellant gun
US4010506A (en) * 1975-09-25 1977-03-08 Stuart Jay Young Oscillating toothbrush
US4137588A (en) * 1975-10-06 1979-02-06 Sandt Clayton C Portable cleaning device
US4359932A (en) * 1977-12-15 1982-11-23 Exxon Production Research Co. Hydraulic actuator
US20060005331A1 (en) * 2004-07-09 2006-01-12 Gimelli Produktions Ag Stroke transmission gear mechanism, and electric toothbrush having such a gear mechanism
US20070175046A1 (en) * 2005-12-22 2007-08-02 John Maxim Cutting and forming tool assembly

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19717334C1 (de) 1997-04-24 1998-07-09 Braun Ag Bürstenteil für eine elektrische Zahnbürste

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3919922A (en) * 1971-01-07 1975-11-18 Pulsepower Systems Modular liquid propellant gun
US4010506A (en) * 1975-09-25 1977-03-08 Stuart Jay Young Oscillating toothbrush
US4137588A (en) * 1975-10-06 1979-02-06 Sandt Clayton C Portable cleaning device
US4359932A (en) * 1977-12-15 1982-11-23 Exxon Production Research Co. Hydraulic actuator
US20060005331A1 (en) * 2004-07-09 2006-01-12 Gimelli Produktions Ag Stroke transmission gear mechanism, and electric toothbrush having such a gear mechanism
DE102004033538A1 (de) * 2004-07-09 2006-02-16 Gimelli Produktions Ag Hubübersetzungsgetriebe und elektrische Zahnbürste mit einem solchen Getriebe
US20070175046A1 (en) * 2005-12-22 2007-08-02 John Maxim Cutting and forming tool assembly
US7793419B2 (en) * 2005-12-22 2010-09-14 Crayola, Llc Cutting and forming tool assembly

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Publication number Publication date
CH497153A (fr) 1970-10-15

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