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WO1999052675A1 - Dispositif ameliore de distribution de matiere particulaire - Google Patents

Dispositif ameliore de distribution de matiere particulaire Download PDF

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Publication number
WO1999052675A1
WO1999052675A1 PCT/US1998/007052 US9807052W WO9952675A1 WO 1999052675 A1 WO1999052675 A1 WO 1999052675A1 US 9807052 W US9807052 W US 9807052W WO 9952675 A1 WO9952675 A1 WO 9952675A1
Authority
WO
WIPO (PCT)
Prior art keywords
check valve
barrel
end cap
particulate matter
fluidizing chamber
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.)
Ceased
Application number
PCT/US1998/007052
Other languages
English (en)
Inventor
Henry B. Schur
John Trafton
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to AU69595/98A priority Critical patent/AU6959598A/en
Priority to PCT/US1998/007052 priority patent/WO1999052675A1/fr
Publication of WO1999052675A1 publication Critical patent/WO1999052675A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C19/00—Dental auxiliary appliances
    • A61C19/06—Implements for therapeutic treatment
    • A61C19/063—Medicament applicators for teeth or gums, e.g. treatment with fluorides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C5/00—Devices or accessories for generating abrasive blasts
    • B24C5/02—Blast guns, e.g. for generating high velocity abrasive fluid jets for cutting materials

Definitions

  • This invention relates to delivery devices, and in particular to an improved apparatus for delivery of pressurized particulate matter against a surface or target to abrade, etch, erase, cut, penetrate, smooth, clean, polish and harden the surface or target.
  • This application is a Continuation-In-Part of U.S. Application Serial Nos. 08/517,379 filed on August 21, 1995, and 08/746,737 filed on November 15, 1996, which are incorporated by reference.
  • changes that included deletions from the aforementioned parent applications have necessitated a change in the inventive entity.
  • the major aspect of the present invention is a prefilled, sealed, and disposable fluidizing chamber and cannula assembly that avoids contamination and which has already been approved by the FDA for dental use.
  • Earlier designs of pressurized particulate matter delivery devices have demonstrated there can be difficulty with clogging in the fluidizing chamber and/or the delivery tube.
  • the present invention is partially directed to an improved internal structure of the fluidizing chamber which produces effective fluidization without clogging. It further provides for a custom designed double acting safety check valve to prevent
  • SUBSTITUTE SHEET (RULE : backflow of particulate matter in the event of a drop in pneumatic pressure, and also to prevent excessive pressure from reaching the fluidizing chamber and delivery tube in the event of a pressure surge.
  • Another feature of the invention includes a tapered nozzle and optionally bent particle delivery cannula.
  • the custom designed double acting safety check valve aspect of the invention is designed to attach to the pneumatic pressure line of a dental office pedestal, operated by a foot pedal. This disposable fluidizing chamber and cannula assembly is extremely lightweight and is removably connected to the check valve.
  • the primary object of the present invention is to provide a particulate matter delivery device that includes an FDA approved prefilled, sealed, and disposable fluidizing chamber and cannula that avoids contamination. Prefilling, sealing, and disposability are key aspects to assurances that materials used in a patient's mouth are sanitary since the manufacturing facility has complete control over the sterility of the inventive device and the particulate matter with which it is charged in the manufacturing process.
  • Another important object of the present invention is to provide a particulate matter delivery device that includes an improved internal structure of the fluidizing chamber which produces effective fluidization without clogging.
  • One more important object of the present invention is to provide a particulate matter delivery device wherein the prefilled, sealed, and disposable fluidizing chamber and cannula assembly is removably connected to a custom designed double acting safety check valve, which acts to both prevent backflow to the pneumatic pressure line of a dentist's pedestal in the event of a pressure drop and also prevents pressure surges from reaching the fluidizing chamber, and the patient's mouth.
  • a related object of this invention is to provide a particulate matter delivery apparatus wherein the custom designed double acting safety check valve is removably attached to the pneumatic pressure line of a dental office pedestal, operated by a foot pedal.
  • a further object of this invention is to provide a device for delivery of a fluid particle stream using a cannula with a tapered nozzle to accelerate particle velocity.
  • An additional object of this invention is to provide a particulate matter delivery apparatus that is very lightweight to make it easy for a dentist or oral hygienist to use.
  • One more object of the invention is to provide an effective, safe, sanitary, FDA approved, easy to use dental cleaning device that requires essentially no capital investment by the dentist because it employs a pneumatic pressure line already found on a dentist's pedestal, uses a small lightweight check valve, and a small lightweight fluidizing chamber and cannula assembly that is disposable.
  • a preferred embodiment includes a fluidizing chamber for mixing fluid and particulate matter together by suspending the latter in the former, and a cannula tube having a particle accelerating tapered nozzle extending outside the fluidizing chamber, wherein the cannula tube delivers pressurized particulate matter from the fluidizing chamber to a surface or target at a high velocity.
  • SUBSTITUTE SHEET(RULE26 ⁇ suspension of the particulate matter in the fluid usually air. It is merely comprised of a discharge end of an inlet tube that is disposed below the intake end of the cannula or overlaps it. Both the inlet tube and cannula tube are preferably insert molded into the adjoining members of the fluidizing chamber structure. The effect is that the discharge of the inlet tube blows the particulate matter into the fluid above the intake end of the cannula, thereby suspending it therein, without clogging.
  • the members of the fluidizing chamber structure are comprised of a barrel, to which the cannula is preferably insert molded, and a barrel end cap, to which the inlet tube is preferably insert molded.
  • the barrel end cap preferably has internal threads which rotate about and engage mateable threads on the top of the barrel of the fluidizing chamber.
  • Another important feature of the preferred embodiment is the custom designed double acting safety check valve which is disposed between the prefilled, sealed, and disposable fluidizing chamber and the pneumatic pressure line of a dental office pedestal.
  • This check valve primarily acts to prevent particulate matter from being drawn back in to the pneumatic pressure line in the event of a sudden drop in pressure, but will also will seal off the inlet tube into the fluidizing chamber in the event of a pressure surge such as may occur with a regulator failure or an unregulated runaway compressor.
  • One more feature of the invention is the use of a particle accelerating tapered nozzle at the discharge end of the cannula. This increases the velocity of the particles exiting from the cannula discharge orifice.
  • Fig. 1 is a plan view of the improved particulate matter delivery device.
  • Fig. 2 is a partial cross-sectional view of the improved particulate matter delivery device of Fig. 1, showing the interior structure of the fluidizing chamber.
  • Fig. 3 is a broken cross sectional view of the top end of the barrel member of the fluidizing chamber showing the threaded end thereof.
  • Fig. 4 is a cross-sectional view of the barrel end cap member showing mating internal threads for attachment to corresponding threads on the top of the barrel.
  • Fig. 5 is a end view of the barrel end cap member of the fluidizing chamber showing eccentric position of the opening into which the inlet tube is placed to accommodate the fact that the discharge end of an inlet tube is disposed below the intake end of the cannula, which is concentric with the barrel.
  • This Figure also shows the alternating barrel end cap flats and bulges of the locking hub end.
  • Fig. 6 is a broken view of the barrel showing an alternative embodiment of the cannula in a bent configuration that may be preferred by some users of the invention.
  • Fig. 7 is a side view of the barrel end cap of Fig. 5 showing an enlarged lateral dimension of the barrel end cap bulges of the locking hub end, used to interconnect with the check valve jaw lips.
  • Fig. 8 is a second alternative embodiment of the cannula 6 with a flared intake end.
  • Fig. 9 is partial cross-sectional view of the double acting check valve showing the internal structure thereof.
  • Fig. 10 is an end view of the double acting check valve and jaw, which interconnects with the locking hub end of barrel end cap as seen in Fig. 5.
  • Fig. 1 is a plan view of the improved particulate matter delivery device 2, having a fluidizing chamber 4, cannula 6, and double acting check valve 8.
  • the fluidizing chamber 4 is comprised of barrel 10, and barrel end cap 12.
  • Cannula 6 preferably includes a tapered nozzle 14 to accelerate particle velocity toward the target (not shown) .
  • Cannula 6 terminates, of course, with a discharge orifice 16.
  • Fig. 2 is a partial cross-sectional view of the improved particulate matter delivery device 2 of Fig. 1, showing the interior structure of the fluidizing chamber 4.
  • Inlet tube 18 having discharge end 20 is shown overlapping the intake end 22 of cannula 6 to achieve the suspension of particulate matter in fluid such as air. Since the improved particulate matter delivery device 2, when in use, is usually held erect with the cannula 6 generally below the fluidizing chamber 4, the particulate matter 24 will generally then be resting at the cannula end of the barrel 10. It is for that reason that the above description refers to the internal structure of the fluidizing chamber as having a discharge end of an inlet tube that is disposed "below" the intake end of the cannula 6.
  • Cannula 6 is tightly held in barrel aperture 26. It is preferably insert molded thereat but also may be glued, press fitted or the like.
  • barrel end cap 12 is shown attached to barrel 10 at mateable threads 28. Also seen are double acting check valve 8, check valve jaws 30, which interconnect with locking hub end 32 at the top end of barrel end cap 12, gasket 34, guide pin 36 and pneumatic pressure line connector 38.
  • Fig. 3 is a broken cross sectional view of the top end 40 of the barrel member 10 of the fluidizing chamber 4 showing the mateable threads 28.
  • Fig. 4 is a cross-sectional view of the barrel end cap 12 showing mating internal threads 28, for attachment to corresponding threads on the top of the barrel, and barrel end cap aperture 42 into which is placed inlet tube 18 as seen in Figure 2.
  • Inlet tube 18 is placed in barrel end cap aperture 42 preferably during the molding process, i.e., is insert molded. Alternatively inlet tube 18 may be glued or press fitted into barrel end cap aperture 42.
  • barrel end cap 12 includes barrel end cap flats 44 as more clearly seen in Fig 5 and O-ring bearing internal surfaces 80.
  • Fig. 5 is a end view of the barrel end cap 12 of the fluidizing chamber 4 showing the eccentric position of the barrel end cap aperture 42 , which is necessitated by the overlapping configuration of the inlet tube 18 and the barrel concentric cannula 6 as seen in Fig. 2. Also seen barrel end cap flats 44, barrel end cap bulges 78, rotation stops 46, and, in phantom, mateable threads 28.
  • Fig. 6 is a broken view of the barrel 10 showing an alternative embodiment of the cannula 6 in a bent configuration that may be preferred by some users of the invention.
  • Fig. 7 is a side view of the barrel end cap 12 of Fig. 5 showing an enlarged lateral dimension of the barrel end cap bulges 78 of the locking hub end 32.
  • the barrel end cap 8 bulges 78 interconnect and are tightly held as seen in Fig. 2 with the check valve jaws lips 74 disposed on the distal ends of check valve jaws 30.
  • Fig. 8 is a second alternative embodiment of the cannula 6 with a flared intake end 48.
  • Fig. 9 is partial cross-sectional view of the double acting check valve 8 in combination with check valve jaws 30, guide pin 36 and pneumatic pressure line connector 38 showing the internal structure of check valve 8.
  • Double acting check valve 8 is comprised of a check valve housing 50, check valve intake manifold 52, check valve intake port 54, resilient valve shuttle 56, check valve cylinder 58, check valve biasing means 60, floating biasing means retainer 62, check valve housing cap 64, check valve assembly retainer 66, check valve discharge port 68, O-ring channel 70, O-ring 72, check valve jaws 30 and check valve jaw lips 74.
  • Resilient valve shuttle 56 may be made from rubber, and check valve biasing means 60 is preferably a coil spring.
  • check valve 8 In operation, air pressure entering check valve 8 passes through pneumatic pressure line connector 38 into check valve intake manifold 52. The pressure is exerted on resilient valve shuttle 56 which then overcomes the resistance of the check valve biasing means 60 and opens the check valve intake port 54. The fluid then passes through the check valve cylinder 58 to emerge through the check valve discharge port 68.
  • FIG. 10 is an end view of the double acting check valve 8 showing the top of the check valve housing 50, check valve discharge port 68, check valve jaws 30 and check valve jaw lips 74.
  • the above embodiments describe using particulate matter such as aluminum oxide in the chamber, other particles such as but not limited to sodium bicarbonate can be used. Further, the above embodiments can include a separate water line running through the interior chamber from a conventional outside waterline so that water under pressure can be sprayed onto teeth in a cleaning operation while sodium bicarbonate or aluminum oxide is also used in combination to clean the teeth. 10
  • Various materials used in the construction of the embodiments include but are not limited to plastic, stainless steel, DelrinTM, and TeflonTM.
  • various components can be sealingly attached to one another by means such as but not limited to ultrasonic welding, adhesive bonding, screwing and ratcheting, and sealing by solvent welding.

Landscapes

  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (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)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

L'invention concerne un appareil (2) permettant de distribuer une matière particulaire sous pression, sur une surface ou sur une cible, utilisé par les dentistes et les hygiénistes bucco-dentaires pour nettoyer les dents, et n'ayant aucun effet sur des tissus mous tels que les gencives. Une chambre de fluidisation préchargée, hermétique et jetable et un ensemble canule évitent la contamination et ont déjà été approuvées par le FDA pour une utilisation dentaire. La chambre d'admission (4) possède une extrémité de décharge (20) d'un tube d'entrée (18) placé sous ou recouvrant l'extrémité d'admission de la canule (6), de sorte que celle-ci est suspendue dans le tube. Un clapet de non retour (8) de sécurité à double effet empêche le reflux de la matière particulaire dans l'éventualité d'une chute de pression pneumatique, et empêche également qu'une pression excessive atteigne la chambre de fluidisation (4) et la canule (14) et incurve éventuellement celle-ci. L'invention concerne également une buse conique (38) et éventuellement une canule incurvée (6). Le clapet de non retour (14) est fixé à la ligne de pression (38) d'un socle de support d'instruments de cabinet dentaire.
PCT/US1998/007052 1998-04-09 1998-04-09 Dispositif ameliore de distribution de matiere particulaire Ceased WO1999052675A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU69595/98A AU6959598A (en) 1998-04-09 1998-04-09 Improved particulate matter delivery device
PCT/US1998/007052 WO1999052675A1 (fr) 1998-04-09 1998-04-09 Dispositif ameliore de distribution de matiere particulaire

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US1998/007052 WO1999052675A1 (fr) 1998-04-09 1998-04-09 Dispositif ameliore de distribution de matiere particulaire

Publications (1)

Publication Number Publication Date
WO1999052675A1 true WO1999052675A1 (fr) 1999-10-21

Family

ID=22266797

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1998/007052 Ceased WO1999052675A1 (fr) 1998-04-09 1998-04-09 Dispositif ameliore de distribution de matiere particulaire

Country Status (2)

Country Link
AU (1) AU6959598A (fr)
WO (1) WO1999052675A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6500657B1 (en) 2000-03-31 2002-12-31 Millennium Pharmaceuticals, Inc. 33167, a novel human hydrolase and uses therefor
CN110584820A (zh) * 2019-10-30 2019-12-20 河南省中医院（河南中医药大学第二附属医院） 口腔治疗辅助装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2441441A (en) * 1946-09-05 1948-05-11 Jens A Paasche Erasing tool
US2725684A (en) * 1955-01-27 1955-12-06 Dalton L Crowe Portable sand blaster
US4475370A (en) * 1983-05-16 1984-10-09 Marvin M. Stark Research Foundation Device for treating dental castings
US5123206A (en) * 1987-12-04 1992-06-23 Whitemetal, Inc. Wet abrasive blasting method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2441441A (en) * 1946-09-05 1948-05-11 Jens A Paasche Erasing tool
US2725684A (en) * 1955-01-27 1955-12-06 Dalton L Crowe Portable sand blaster
US4475370A (en) * 1983-05-16 1984-10-09 Marvin M. Stark Research Foundation Device for treating dental castings
US5123206A (en) * 1987-12-04 1992-06-23 Whitemetal, Inc. Wet abrasive blasting method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6500657B1 (en) 2000-03-31 2002-12-31 Millennium Pharmaceuticals, Inc. 33167, a novel human hydrolase and uses therefor
CN110584820A (zh) * 2019-10-30 2019-12-20 河南省中医院（河南中医药大学第二附属医院） 口腔治疗辅助装置

Also Published As

Publication number Publication date
AU6959598A (en) 1999-11-01

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