FreshPatents.com Logo
stats FreshPatents Stats
3 views for this patent on FreshPatents.com
2012: 3 views
Updated: October 26 2014
newTOP 200 Companies filing patents this week


    Free Services  

  • MONITOR KEYWORDS
  • Enter keywords & we'll notify you when a new patent matches your request (weekly update).

  • ORGANIZER
  • Save & organize patents so you can view them later.

  • RSS rss
  • Create custom RSS feeds. Track keywords without receiving email.

  • ARCHIVE
  • View the last few months of your Keyword emails.

  • COMPANY DIRECTORY
  • Patents sorted by company.

Follow us on Twitter
twitter icon@FreshPatents

Disposable dental handpiece

last patentdownload pdfdownload imgimage previewnext patent


20120276498 patent thumbnailZoom

Disposable dental handpiece


A sterile, substantially maintenance free disposable dental handpiece is constructed from two shells and a center core, the center core having a flow deflector on one end. The shells are joined around the core with mating protrusions and/or tapered walls to form the body and head of the handpiece. A base is integrally-formed with the center core. The base has conduits that allow entry of light and pressurized air and/or water into the body. The head at the opposite end of the body from the base rotatably mounts an impeller assembly having an impeller shaft. The impeller shaft includes blades driven by the pressurized air. The blades can have cavities to reduce weight.
Related Terms: Dental Handpiece Disposable Dental Handpiece

Browse recent Axenic Dental, Inc. patents - ,
Inventors: Eli Thomssen, Dirk Schipper, Kevin Turner
USPTO Applicaton #: #20120276498 - Class: 433 29 (USPTO) - 11/01/12 - Class 433 
Dentistry > Apparatus >Having Means To Emit Radiation Or Facilitate Viewing Of The Work

view organizer monitor keywords


The Patent Description & Claims data below is from USPTO Patent Application 20120276498, Disposable dental handpiece.

last patentpdficondownload pdfimage previewnext patent

This application is a non-provisional of and claims benefit under 35 U.S.C. §119(e) to U.S. Provisional Patent Application No. 60/969,094, filed Aug. 30, 2007, which is incorporated in its entirety by reference herein.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates generally to a handpiece for dental procedures, and more particularly to a disposable hand-held instrument for dental drilling.

2. Background

Common dental procedures involve the use of a drill to reduce at least a portion of a tooth prior to performing work on the area of the mouth on or near the tooth. In some instances, decayed enamel is removed from a tooth prior to replacement with a hardened substitute. In some instances, some or all of a tooth is removed with a dental drill prior to work beneath the gum line.

Typical drills used for such work have several components. First, a handpiece, typically constructed from stainless steel, or a steel alloy is used. An appropriate bit is selected for the work to be accomplished. Some bits have variable lengths and surface properties which affect the character of operation. The bit is then inserted into a rotating portion of the handpiece, and securely coupled to it. Finally, a source of pressurized air is connected to the handpiece, the flow of which is directed within the handpiece to rotate the turbine, which in turn rotates the bit at speeds useful for drilling.

After the handpiece has been used to perform a procedure on a patient, the handpiece is typically flushed with air or water for approximately 20 to 30 seconds in an attempt to discharge material that might have entered the turbine and/or air and water channels. The handpiece is then disconnected from the air source, and the bit is removed. Previously, the bit and handpiece have been sterilized, usually by steam or chemicals in an autoclave, requiring time between procedures or, in a busy office, the purchase of multiple handpieces and bits to allow for continuous use during sterilization.

The cost of the handpieces individually can be high. Moreover, the cost to refurbish reusable handpieces when the performance of certain features, such as bearings or light sources, degrades can be high. Additionally, handpieces may not be completely sterilized after use, or sterilized handpieces may not be properly sterilized or maintained in a sterile container after cleaning prior to use on a subsequent patient, increasing the exposure to potentially unclean environments. Although some disposable handpieces exist, they are often not provided in a sterile package and typically have inferior performance characteristics to reusable handpieces. Thus, the need exists for a sufficiently powerful, low-cost handpiece which can be assured of sterility for use on a single patient.

SUMMARY

OF THE INVENTION

An aspect of at least one of the embodiments disclosed herein includes the realization that dental handpieces can be run with air, and that incorporating a structure which delivers air to the turbine blades of the handpiece in an efficient and high speed manner is advantageous.

Thus, in accordance with an embodiment, a disposable dental instrument driven by compressed air comprises an elongated body comprising a first shell half, a second shell half, and a core, the shell halves joined to form an exterior surface for manual manipulation, the shell halves additionally forming a cavity, the cavity having various passageways as fluid conduits. The dental instrument further comprises a base comprising a plurality of conduits, the base communicating with an outside source of light and fluid through the conduits, the conduits communicating with the passageways defined by the elongated body, and a head located at the opposite end from the base, the head comprising a turbine shaft rotatably mounted within the head. The dental instrument further comprises a turbine impeller, the turbine impeller connected to the turbine shaft, the turbine impeller being driven by an outside source of air through an air nozzle to rotate a dental bit, at least one opening located under the head configured to deliver fluid away from the dental instrument, at least one opening located under the head configured to deliver light away from the dental instrument, and wherein the air nozzle has a rectangular cross-sectional shape to create an airflow which more closely matches a rectangular cross section of a turbine blade.

Another aspect of at least one of the embodiments disclosed herein includes the realization that sealing two shell halves and a core together to form various conduits or passageways for light, air, and/or water can be difficult, and can lead to imperfections in the assembly. Including tapered mating portions on the core and left shell half can provide a gradually changing distance from the surface of the core for welding, thereby reducing or eliminating shape changes sufficiently sharp to cause imperfections in a sonic welding assembly.

Thus, in accordance with an embodiment, a disposable dental instrument driven by compressed air comprises an elongated body comprising a first shell half, a second shell half, and a core, the shell halves joined to form an exterior surface for manual manipulation, the shell halves additionally forming a cavity, the cavity having various passageways as fluid conduits. The dental instrument further comprises a base comprising a plurality of conduits, the base communicating with an outside source of light and fluid through the conduits, the conduits communicating with the passageways defined by the elongated body. The dental instrument further comprises a head located at the opposite end from the base, the head comprising a turbine shaft rotatably mounted within the head, a turbine impeller, the turbine impeller connected to the turbine shaft, the turbine impeller being driven by an outside source of air through an air nozzle to rotate a dental bit. The dental instrument comprises at least one opening located under the head configured to deliver fluid away from the dental instrument, and at least one opening located under the head configured to deliver light away from the dental instrument. The core comprises a flange extending away from a central face of the core, and a seam disposed along the edge of the flange, and wherein the first shell half comprises a wall extending towards the central face of the core, the wall having a tapered portion, the tapered portion being sized and shaped to mate with the flange.

Another aspect of at least one of the embodiments disclosed herein includes the realization that it is advantageous for dental instruments to direct light to a patient\'s tooth or interaction region, so as to better view what work is being done. Thus, it is desirable to have a reliable, stable light source attached to and within the dental handpiece to deliver light from the handpiece.

Thus, in accordance with an embodiment, a disposable dental instrument driven by compressed air comprises an elongated body comprising a first shell half, a second shell half, and a core, the shell halves joined to form an exterior surface for manual manipulation, the shell halves additionally forming a cavity, the cavity having various passageways as fluid conduits. The dental instrument further comprises a base comprising a plurality of conduits, the base communicating with an outside source of light and fluid through the conduits, the conduits communicating with the passageways defined by the elongated body. The dental instrument further comprises a head located at the opposite end from the base, the head comprising a turbine shaft rotatably mounted within the head, a turbine impeller, the turbine impeller connected to the turbine shaft, the turbine impeller being driven by an outside source of air through an air nozzle to rotate a dental bit. The dental instrument further comprises at least one opening located under the head configured to deliver fluid away from the dental instrument, and at least one opening located under the head configured to deliver light away from the dental instrument. The dental instrument further comprises a light rod configured to deliver light to one of the openings, the light rod comprising a tab extending from a body of the light rod, wherein the center core comprises at least one molded projection configured to engage the light rod tab and inhibit motion of the light rod in at least one direction.

Another aspect of at least one of the embodiments disclosed herein includes the realization that directing air to a turbine within the dental instrument can be made more efficient through the use of a flow deflector. The geometry of the flow deflector can increase air speed, reduce noise, and direct the air flow in a particular manner within the turbine area of the handpiece.

Thus, in accordance with an embodiment, a disposable dental instrument driven by compressed air comprises an elongated body comprising a first shell half, a second shell half, and a core, the shell halves joined to form an exterior surface for manual manipulation, the shell halves additionally forming a cavity, the cavity having various passageways as fluid conduits. The dental instrument further comprises a base comprising a plurality of conduits, the base communicating with an outside source of light and fluid through the conduits, the conduits communicating with the passageways defined by the elongated body. The dental instrument further comprises a head located at the opposite end from the base, the head comprising a turbine shaft rotatably mounted within the head, a turbine impeller, the turbine impeller connected to the turbine shaft, the turbine impeller being driven by an outside source of air through an air nozzle to rotate a dental bit. The dental instrument further comprises at least one opening located under the head configured to deliver fluid away from the dental instrument, and at least one opening located under the head configured to deliver light away from the dental instrument. The core further comprises a flow deflector located on the end of the core nearest the head, the flow deflector projecting further towards the first shell half than towards the second shell half, an edge of the flow deflector forming a part of the air nozzle.

Another aspect of at least one of the embodiments disclosed herein includes the realization that reducing the weight of a dental handpiece can save on cost, as well as make the handpiece easier to ship and use.

Thus, in accordance with an embodiment, a disposable dental instrument driven by compressed air comprises an elongated body comprising a first shell half, a second shell half, and a core, the shell halves joined to form an exterior surface for manual manipulation, the shell halves additionally forming a cavity, the cavity having various passageways as fluid conduits. The dental instrument further comprises a base comprising a plurality of conduits, the base communicating with an outside source of light and fluid through the conduits, the conduits communicating with the passageways defined by the elongated body. The dental instrument further comprises a head located at the opposite end from the base, the head comprising a turbine shaft rotatably mounted within the head, a turbine impeller, the turbine impeller connected to the turbine shaft, the turbine impeller being driven by an outside source of air through an air nozzle to rotate a dental bit. The dental instrument further comprises at least one opening located under the head configured to deliver fluid away from the dental instrument, and at least one opening located under the head configured to deliver light away from the dental instrument. The turbine shaft further comprises blades, the turbine shaft having cavities formed within the outer boundary of the blades.

BRIEF DESCRIPTION OF THE DRAWINGS

These and other features and advantages of the present embodiments will become more apparent upon reading the following detailed description and with reference to the accompanying drawings of the embodiments, in which:

FIG. 1A is a front, top, and right side perspective view of an embodiment of a dental instrument.

FIG. 1B is a bottom plan view of an embodiment of a dental instrument.

FIG. 2A is an exploded perspective view of an embodiment of a dental instrument.

FIG. 2B is a right side elevational view of an embodiment of a left shell component of a dental instrument.

FIG. 2C is a cross-sectional view of the embodiment of FIG. 2B.

FIG. 3A is a front, top, and left side perspective view of an embodiment of a center core of a dental instrument.

FIG. 3B is a left side perspective view of an embodiment of a center core of a dental instrument.

FIG. 3C is a top plan view of an embodiment of a center core of a dental instrument.

FIG. 3D is a partial left side perspective view of an embodiment of a center core of a dental instrument.

FIG. 4 is a cross sectional view of the embodiment of FIG. 3B.

FIG. 5 is a top, front, and left side perspective view of an embodiment of a dental instrument, with the left shell half removed.

FIG. 6 is a front, top, and right side perspective view of an embodiment of a dental instrument, with the right shell half removed.

FIG. 7 is a partial left side elevational view of an embodiment of a dental instrument, with the left shell half removed.

FIG. 8A is partial right side elevational view of an embodiment of a dental instrument with the right shell half removed.

FIG. 8B is a partial right side elevational view of an embodiment of a dental instrument with the right shell half and impeller assembly removed.

FIG. 8C is a cross sectional view of the embodiment of FIG. 8B.

FIG. 9 is a cross-sectional view of the embodiment of FIG. 8A.

FIG. 10 is another cross-sectional view of the embodiment of FIG. 8A.

FIG. 11 is a right side elevational view of an embodiment of a dental instrument with the right shell half removed.

FIG. 12 is a cross sectional view of the embodiment of FIG. 11.

FIG. 13 is a cross sectional view of an embodiment of a head of a dental instrument.

FIG. 14 is an exploded perspective view of an embodiment of a dental instrument.

FIG. 15A is a front and top side perspective view of an embodiment of the turbine impeller components of a dental instrument.

FIG. 15B is a cross sectional view of the embodiment of FIG. 15A.

FIG. 15C is a front and top side perspective view of an embodiment of the turbine impeller components of a dental instrument.

FIG. 16A is a front and top side perspective view of an embodiment of a grommet as used in a dental instrument.

FIG. 16B is a cross sectional view of the embodiment of FIG. 16A.

FIG. 17A is a front and top side perspective view of an embodiment of a grommet as used in a dental instrument.

FIG. 17B is a cross sectional view of the embodiment of FIG. 17A.

FIG. 18A is a front and top side perspective view of an embodiment of a grommet as used in a dental instrument.

FIG. 18B is a cross sectional view of the embodiment of FIG. 18A.



Download full PDF for full patent description/claims.

Advertise on FreshPatents.com - Rates & Info


You can also Monitor Keywords and Search for tracking patents relating to this Disposable dental handpiece patent application.
###
monitor keywords



Keyword Monitor How KEYWORD MONITOR works... a FREE service from FreshPatents
1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored.
3. Each week you receive an email with patent applications related to your keywords.  
Start now! - Receive info on patent apps like Disposable dental handpiece or other areas of interest.
###


Previous Patent Application:
Apparatus and methods for root canal treatments
Next Patent Application:
Treatment device
Industry Class:
Dentistry
Thank you for viewing the Disposable dental handpiece patent info.
- - - Apple patents, Boeing patents, Google patents, IBM patents, Jabil patents, Coca Cola patents, Motorola patents

Results in 0.68995 seconds


Other interesting Freshpatents.com categories:
Electronics: Semiconductor Audio Illumination Connectors Crypto

###

Data source: patent applications published in the public domain by the United States Patent and Trademark Office (USPTO). Information published here is for research/educational purposes only. FreshPatents is not affiliated with the USPTO, assignee companies, inventors, law firms or other assignees. Patent applications, documents and images may contain trademarks of the respective companies/authors. FreshPatents is not responsible for the accuracy, validity or otherwise contents of these public document patent application filings. When possible a complete PDF is provided, however, in some cases the presented document/images is an abstract or sampling of the full patent application for display purposes. FreshPatents.com Terms/Support
-g2--0.6814
     SHARE
  
           


stats Patent Info
Application #
US 20120276498 A1
Publish Date
11/01/2012
Document #
13540200
File Date
07/02/2012
USPTO Class
433 29
Other USPTO Classes
International Class
/
Drawings
21


Dental Handpiece
Disposable Dental Handpiece


Follow us on Twitter
twitter icon@FreshPatents