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Publication numberUS3740853 A
Publication typeGrant
Publication dateJun 26, 1973
Filing dateJun 3, 1971
Priority dateJun 3, 1971
Publication numberUS 3740853 A, US 3740853A, US-A-3740853, US3740853 A, US3740853A
InventorsBrahler G
Original AssigneeExitec Inc
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Dental prophy angle
US 3740853 A
Abstract  available in
Images(1)
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Claims  available in
Description  (OCR text may contain errors)

United States Patent 91 Brahler DENTAL PROPHY ANGLE [75] Inventor: George R. Brahler, Lawrence, Kans. [73] Assignee: Exitec, Inc., Lawrence, Kans.

[22] Filed: June 3, 1971 [21] Appl. No.: 149,590

Related U.S. Application Data [63] Continuation-impart of Ser. No. 17,432, March 9,

1970, abandoned.

Primary Examiner-Robert Peshock Attorney schmidt, Johnson, Hovey & Williams 111 3,740,853 June 26, 1973 [57] ABSTRACT A dental prophy angle adapted to be coupled with a conventional power source, the angle being used in dental prophylaxis and being of a disposable construction whereby there is no danger of a chain of sepsis from one patients mouth to another. The dental prophy angle is fabricated from suitable plastic materials and includes a housing having a passageway formed therein and extending from one end of the housing to the other, a flexible, rotatable drive shaft extending the length of the housing within the passageway, the shaft having a base stretch, a reduced stretch, and a head stretch, there being at least a pair of outwardly extending, annular ribs on the shaft, which ribs are received by recesses in communication with the passageway, the base stretch of the shaft being coupled with the power source, the head stretch being angularly offset with respect to the base stretch and having means thereon for receiving a workpiece.

1 Claim, 5 Drawing Figures PAIENTEDaunzs ms 22 1111111411111Inn/Iliumv INVENTOR. 6e urge R Brah/er BY I vvkuevs.

DENTAL PROPIIY ANGLE CROSS REFERENCES This is a continuation-in-part of application Ser. No. 17,432, filed Mar. 9, 1970 and now abandoned, and entitled Dental Prophy Angle.

It is the most important object of this invention to provide an angle for use in dental prophylaxis, which dental prophy angle is adapted to be coupled with a typical power source, as is conveniently provided in dental equipment, the entire prophy angle being disposable after a single use whereby to preclude any possibility of a chain of sepsis from the mouth of one patient to the mouth of a succeeding patient.

To accomplish the disposability, the angle is formed from a housing fabricated from a suitable plastic material, the housing having a passageway formed therein and extending from one end of the housing to the other, there being a flexible plastic, rotatable drive shaft extending the length of the housing, the drive shaft having a base stretch which is adapted to be coupled with the power source, a reduced stretch which traverses an area of bend, and a head stretch having button means thereon for coupling a workpiece to the shaft whereby, upon rotation of the shaft, the workpiece will be rotated.

Yet another important object of this invention is to provide means for locating the shaft within the passageway and for permitting the rotation thereof, such means taking the form of at least a pair of outwardly extending, spaced annular ribs, one of the ribs being on the base stretch of the shaft, the other being located at the juncture of the reduced stretch and the head stretch, there being recesses defined by said housing and in communication with the passageway, the recesses receiving the ribs for free rotation the'rewithin.

Other objects include details of construction which will become apparent from the following specification and accompanying drawings, wherein:

FIG. 1 is an elevational view of the dental prophy an- FIG. 2 is a substantially central, longitudinal sectional view thereof;

FIG. 3 is a sectional view taken along line 3--3 of FIG. 2;

FIG. 4 is a fragmentary, elevational view of the drive shaft; and

FIG. 5 is an end elevational view of the drive shaft taken from the right side of FIG. 4.

The prophyangle includes a housing 12 which may be molded from plastic intwo identical half sections, the housing having a passageway 14 formed therein whichreceives a drive shaft 16. The prophy angle" as thus broadly constituted, is utilized in the dental profession for various purposes, such as cleaning teeth or the like, the prophy angle being attached to a suitable power source, which power source is conventionally in the nature of a straight handpiece which is powered by means such as an air motor, pressurized water, suitable belt and pulley arrangements or equivalent power devices whereby power is delivered to the straight handpiece for ultimate delivery to the particular tool which is coupled to the handpiece.

Thus, in the present invention, it is intended to provide a disposable dental prophy angle which can be readily coupled with the power source conventionally provided in a straight dental handpiece. To this end, it

is contemplated that all of the components of the prophy angle 10 will be fabricated from a suitable plastic material whereby the same may be readily and economically molded, the housing 12 being molded in mating half sections which can be suitably secured together whereby to provide an enclosure for drive shaft 16 and, at the same time, define the passageway 14 in which the drive shaft 16 is received.

The housing 12 includes a shank portion 18 ofa conical configuration which is tapered toward a head portion 20, the head portion 20 of the housing 12 being angularly offset with respect to the shank portion 18 thereof, all as is clearly shown in the drawings, it being appreciated that the degree of angular offset of head portion 20 with respect to shank portion 18 may be varied, depending upon the particular use to which the prophy angle 10 is to be put.

Housing 12 presents an open end 22 which is normally proximal to the point of coupling of the prophy angle with the power source and an opposed end surface 24 which is normally proximal to the workpiece 26, such as a rubber cup for instance, which is coupled with the prophy angle 10.

The passageway 14 which is defined by the housing 12 and which extends from one end 22 to the other end 24 thereof, is initially in the form of a conical cavity 28 which then decreases in dimension to a generally cylindrical passage 30, which passage 30 extends through the remainder of shank portion 18 of the housing 12 and through the head portion 20 of housing 12 to the end surface 24 thereof, the passageway 30 opening out of the housing 12 whereby to present an open head end 32.

The flexible shaft 16, which is fabricated from a suitable plastic material, is best shown in FIG. 4 of the drawings, the shaft 16 including a base stretch 34; a centrally positioned reduced stretch 36; and a head stretch 38, the base stretch 34 and the head stretch 38 being of the same diameter, the reduced stretch 36 being of a diameter smaller than that of stretches 34 and 38. A step or shoulder 40 is presented between the base stretch 34 and the reduced stretch 36.

Shaft 16 also carries at least a pair of outwardly extending, spaced annular ribs 42 and 44, the rib 42 being formed as a part of base stretch 34 and the rib 44 being formed at the juncture between the reduced stretch 36 and the head stretch 38. Each of the ribs has opposed, flat faces such as 46 and 48 and an outermost rim or edge 50.

The shaft 16 also has formed as a part thereof, an outwardly extending, annular stop member 52, said stop member being of a diameter greater than that of the head stretch 38 of which it is a part, and also greater than the diameter of the ribs 42 and 44, the di ameter of said ribs 42 and 44, in turn, being greater than that of any stretch of the shaft 16. Head stretch 38 of the shaft 16 also has formed as a part thereof a button 54, the button 54 being at the other end 56 of the shaft 16, which other end 56 is opposite to the one end 58 which is coupled with the power source (not shown).

When the shaft 16 is disposed within the housing 12 and the prophy angle 10 is ready for operation, the shaft 16, which is of cylindrical cross-sectional configuration, lies within the passageway 14, as illustrated for instance in FIG. 3, the shaft being positioned in such a manner that the base stretch 34 and a portion of the reduced stretch 36 lie in one plane. the remainder of reduced stretch 36 and the head stretch 38 being angularly offset, the reduced stretch 36 traversing the area of bend 60 of the housing 12 and passageway 14.

In order to permit and facilitate ready rotation of the shaft 16 within the passageway 14, and to prevent longitudinal movement of the shaft 16 within the passageway 14, each of the ribs 42 and 44 is received within a corresponding recess 62 and 64 respectively, which recesses are defined by the housing 12 and are in communication with the passageway 14, all as clearly illustrated in FIG. 2 of the drawings. The recesses 62 and 64 are each of annular configuration and are of a diameter greater than the ribs 42 and 44 which are received therein respectively.

The stop member 52 is positioned against the end surface 24 of the housing 12 whereby to also prevent longitudinal retraction of the shaft 16 into the housing 12 as the shaft is rotated upon actuation of the power source to which the shaft 16 is coupled. The stop member 52 also serves to maintain button 54 at the desired spaced interval from end wall 24 of the housing 12 whereby the workpiece, such as cup 26, may be readily snap-fitted over the button 54 and thereby rotated as the shaft 16 is rotated within the housing 12.

It has been found that the provision of reduced stretch 36 in shaft 16'facilitates the rotation of the shaft '16 and also that, depending upon the degree of annular offset of head'portion 20 of housing 12 with respect to shank portion 18 thereof, the stretch 36 can be further reduced if the angle of offset is greater. In other words, the higher the degree of angular offset of the shaft and the housing, the further reduction in diameter of the reduced stretch 36 of shaft 16.

Thus there is provided a dental prophy angle l which is readily and economically fabricated from suitable plastic material whereby the prophy angle may be driven by conventional equipment and utilized for a single prophylaxis treatment, the entire prophy angle then being discarded whereby to preclude the possibility of a chain of sepsis from one patient to another.

Having thus described the invention, what is claimed as new and desired to be secured by Letters Patent is:

1. A dental prophy angle comprising: a housing having a passageway formed therein and extending from one end of the housing to the other, said housing having a shank portion and a head portion, the head portion being angularly offset with respect to said shank portion; flexible, rotatable drive shaft extending the length of said housing within said passageway, said shaft having a base stretch, a central stretch, and a head stretch, the base stretch of the shaft being within the shank portion of the housing, the head stretch of the shaft being within the head portion of the housing, there being an area of bend in the shaft between the base stretch and'the head stretch, the central stretch of the shaft occupying said area of bend and traversing the angular offset between the shank portion and the head portion of the housing; and at least a pair of outwardly extending, spaced, annular ribs on said shaft, one of said ribs being on the said base stretch, the other being at the juncture of the central stretch and the head stretch, said ribs having a diameter greater than that of the passageway, there being recesses formed in the housing and in communication with said passageway and receiving said ribs.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4014100 *Sep 15, 1975Mar 29, 1977The Raymond Lee Organization, Inc.Electric tooth polisher
US4182041 *Aug 24, 1978Jan 8, 1980Girard, Inc.Dental prophylactic right angle hand piece
US4185388 *Sep 21, 1977Jan 29, 1980Sven JarbyHoning and polishing instrument especially intended for dental use
US5028233 *Nov 21, 1989Jul 2, 1991Teledyne Industries, Inc.Disposable prophy angle
US5040978 *Dec 22, 1989Aug 20, 1991Dentsply Research & Development Corp.Dental prophy angle
US5120220 *Dec 4, 1990Jun 9, 1992Biodental Technologies CorporationRight angled dental hand piece
US5209658 *Jul 13, 1992May 11, 1993Brahler Products, Inc.Dental prophy angle
US5328369 *Oct 19, 1992Jul 12, 1994Young Dental Manufacturing CompanyDental prophylaxis angle
US5348473 *Feb 17, 1993Sep 20, 1994Kivlighan Jr Michael FMedical tool
US5374189 *Sep 9, 1992Dec 20, 1994Denticator International, Inc.Integrally formed disposable prophy angle and drive mechanism therefor
US5405265 *Jul 30, 1993Apr 11, 1995Denticator International, Inc.For applying polishing compounds to dental structures
US5423679 *Apr 7, 1994Jun 13, 1995Young Dental Manufacturing CompanyDental prophylaxis angle
US5503555 *Apr 7, 1994Apr 2, 1996Young Dental Manufacturing CompanyFor attachment to a dental handpiece
US5522829 *Sep 9, 1994Jun 4, 1996Arthur D. Little Enterprises, Inc.Surgical cutting instrument
US5529495 *Jun 6, 1995Jun 25, 1996Edwards; Donald L.Right angle dental hand piece with spring drive
US5531599 *Jul 11, 1994Jul 2, 1996Young Dental Manufacturing Company, Inc.Disposable dental prophylaxis contra-angle, method of making it, and drive gear for use therein
US5571012 *Jan 11, 1995Nov 5, 1996Teledyne Industries, Inc.Disposable prophy angle and adapter
US5645426 *Sep 27, 1995Jul 8, 1997Dentsply Research & Development Corp.Dental prophy angle
US5662670 *May 10, 1996Sep 2, 1997Michalos; PeterSurgical cutting instrument
US5667383 *Aug 23, 1994Sep 16, 1997Denticator International, Inc.Disposable dental prophylaxis handpiece
US5697773 *Aug 23, 1994Dec 16, 1997Denticator International, Inc.Rotary fluid reaction device having hinged vanes
US5743718 *Jun 7, 1995Apr 28, 1998Denticator International, Inc.Compressed air driven disposable hand tool having a rotor with radially moving vanes
US5749728 *Mar 29, 1996May 12, 1998Young Dental Manufacturing CompanyMethod of assembling a dental prophylaxis angle
US6089866 *Feb 11, 1998Jul 18, 2000Brahler Products, Inc.Drive shaft retention means for prophy angle
US6168433Nov 30, 1999Jan 2, 2001David A. HamlinDirect drive dental prophy angle
US6554614May 3, 2001Apr 29, 20033M Innovative Properties CompanyDental handpiece brush and method of using the same
US7955079Dec 20, 2007Jun 7, 2011Dentsply International, Inc.Dental prophylaxis angle and handpiece assembly
US8591231Jan 20, 2012Nov 26, 2013Edwin W. WolskeAir/gas driven prophylaxis preparation dispensing system for a dental hand piece
EP0433773A1 *Dec 5, 1990Jun 26, 1991Dentsply InternationalDental prophy angle
EP0744928A1 *Feb 10, 1994Dec 4, 1996Young Dental Manufacturing CompanyDisposable dental contra-angle
WO2006065453A1 *Nov 18, 2005Jun 22, 2006Andre MichaelianDental device and method of use
Classifications
U.S. Classification433/112, 433/124
International ClassificationA61C17/00
Cooperative ClassificationA61C17/005
European ClassificationA61C17/00P