Ultrasonic device and method

• US RE30,536 E
• Filed: 05/01/1978
• Issued: 03/03/1981
• Est. Priority Date: 05/01/1978
• Status: Expired due to Term

• Current Assignee: Dentsply Research & Development Corporation Lakeview and Clarke Avenues Milford de 19963
• Original Assignee: Cavitron Corporation
• Inventors: Perdreaux, Rene J. Jr.
• Primary Examiner(s): Peshock, Robert
• Application Number:
  US05/902,304
• Time in Patent Office: 1,037 Days
• Field of Search: 32/28, 32/57, 32/58, 125/11 CS, 433/86, 433/119
• US Class Current: 433/86
• CPC Class Codes: A61C 1/188 Means for allowing non driven rotation of the tool relative to the handle, e.g. toolswivel
• CPC Class Codes: A61C 17/20 using ultrasonics

Abstract

An ultrasonic hand-held cleaning device having a housing enclosing a casing, an energyzing winding about the casing, and a fluid conduit attached to the interior of the casing. A sleeve is insertably mounted into the end of the casing, and acts to support a connecting body at a spaced distance within the sleeve so as to form an annular space in fluid communication with the casing. A vibrator is attached at the casing end to the connecting body and is therefore located in the casing opposite the energyzing winding. A cleaning tool is attached at the other end of the connecting body. In one version fluid moving through the annular space is sprayed out an annular nozzle around the tool which is itself vibrating ultrasonically as a result of reverbretory vibrations induced by the vibrator. In a second preferred embodiment the connecting body has a ring at its nodal point, the sleeve being cut out to accommodate the ring and having two longitudinal slots for the passage of fluid. A tubular insert for controlling the space between the connecting body and the sleeve at the nozzle is supported by the sleeve.

Claims

1. In an ultrasonic device having a casing, an energyzing means adjacent said casing, ultrasonic vibration means mounted in said casing and activated by said energyzing means, means for introducing fluid into an end of said casing, the improvement comprising

a hollow sleeve adapted to be insertably mounted in the end of the casing and in fluid communication therewith,

connecting means attached to one end of said vibration means and extending through said hollow sleeve, said connecting means being mounted at a spaced distance from the internal walls of said hollow sleeve, forming an annular nozzle adjacent said hollow sleeve anterior end for fluid to exit said nozzle in substantially a 360°

annular stream, and

tool means axially fixed to said connecting means at the anterior end thereof.

2. The device according to claim 1 wherein said hollow sleeve additionally comprises support means transversely mounted on the inside of said sleeve for supporting said connecting means at the approximate nodal point thereof.

3. The device according to claim 1 wherein said annular space between said hollow sleeve and said connecting means is sufficiently small to induce the fluid flow at the nozzle to exit as a spray.

4. The device according to claim 1 wherein said nozzle

is biased toward the side of application of force to the tool means.

5. The device according to claim 2 wherein said support means comprises three equally spaced screws threadedly and insertably mounted in three equal spaced threaded holes at 120°

apart on said hollow sleeve, the tip of each of said screws being in contact with said connecting means.

6. The device according to claim 5 wherein said annular space between said hollow sleeve and said connecting means is sufficiently small to induce the fluid flow at the nozzle to exit as a spray.

7. The device according to claim 5 wherein said nozzle opening is biased toward the side of application of force to the tool means.

8. The device according to claim 5 wherein said screws are soft tipped.

9. The device according to claim 5 wherein said casing is tubular and said energyzing means is a winding about said casing, said casing and said winding being enclosed within a housing.

10. The device according to claim 1 wherein said nozzle means comprises a bushing mounted internally in said hollow sleeve adjacent the open end thereof, said bushing having an internal diameter at a spaced distance from said connecting means thereby providing an annular nozzle.

11. In an ultrasonic device having a casing, an energyzing means adjacent said casing, means for introducing fluid into an end of said casing and an insert assembly insertably mounted in said casing, the improvement in said insert assembly comprising

a hollow sleeve adapted to be insertably mounted in the end of the casing and in fluid connection therewith, connecting means extending through said hollow sleeve, said connecting means comprising a shank being mounted at a spaced distance from the internal walls of said hollow sleeve to thereby form an annular space between said sleeve and said shank said annular space being in fluid communication with said casing, and an annular nozzle adjacent said hollow sleeve anterior end for fluid to exist therefrom, said connecting means also comprising a ring transversely mounted on said shank at the nodal point thereof, said hollow sleeve having an internally located transverse slot adapted to accomodate said ring, and a flow detour means for conducting fluid around said ring and into said annular space

ultrasonic vibration means fixedly connected to said connecting means at the posterior end thereof, and adapted to be inserted into said casing into position to be acted upon by said energyzing means, and

tool means axially fixed to said connecting means at the anterior end thereof, said tool means being vibrated by the ultrasonic vibration of said vibration means as transmitted by said connecting means.

12. The device according to claim 11 wherein

said nozzle additionally comprises a bushing mounted internally in said hollow sleeve adjacent the open end thereof, said bushing having an internal diameter at a spaced distance from said shank forming said annular nozzle.

13. In an ultrasonic device having a casing, an energyzing means adjacent said casing, means for introducing fluid into an end of said casing, and and insert assembly insertably mounted in said casing, the improved insert assembly comprising

a hollow sleeve adapted to be insertably mounted in the casing and in fluid communication therewith

connecting means extending through said hollow sleeve, said connecting means being mounted at a spaced distance from the internal wall of said hollow sleeve to thereby form an annular space between said sleeve and said connecting means, said annular space being in fluid communication with said casing, and a nozzle means adjacent said hollow sleeve anterior end for fluid flowing through said space to exit said nozzle means said nozzle means comprising a bushing mounted internally in said hollow sleeve adjacent the open anterior end thereof said bushing having an internal diameter at a spaced distance from said connecting means thereby providing an annular nozzle.

said connecting means additionally comprising a shank portion extending through said hollow sleeve, a shallow channel longitudinally located thereon extending from the interior of said hollow sleeve and past said bushing for providing an added stream of fluid, and a ring transversely mounted on said shank portion at the nodal point thereof, said hollow sleeve having a transverse slot adapted to accomodate said ring and flow detour means for providing fluid passages around said ring,

ultrasonic vibration means fixedly connected to said connecting means at the posterior end thereof and adapted to be inserted into said casing into position to be acted upon by said energyzing means, and tool means axially fixed to said connecting means at the anterior end thereof, said tool means being vibrated by the ultrasonic vibration of said vibration means as transmitted by said connecting means.

14. A method of utilizing fluid in an ultrasonic device and at a work area around the ultrasonic device tool tip, the method comprising

introducing said fluid into the ultrasonic device

cooling vibration means within the device by passing said fluid over the vibration means

cooling a connecting means attached to the vibration means by forcing the fluid through an annular space between the connecting means and a hollow sleeve,

simultaneously with said step of cooling the connecting means, attenuating vibratory transfer from the connecting means to the sleeve, and

spraying said fluid in a 360°

area about a tool attached to the connecting means.

15. The method of claim 14 wherein an added spray is directed at a point nearest the tool. .Iadd.

16. An insert assembly for an ultrasonic handpiece, said assembly comprising ultrasonic vibration means, for generating an output, means connected to said ultrasonic vibration means for coupling said output to a working tool, and tool means connected to said connecting means for receiving said output, the improvement comprising:

housing means surrounding said connecting means for providing an annular space between the inner wall of said housing means and said connecting means, and

bushing means connected to said housing in proximity to said tool means for providing an annular nozzle about said tool means. .Iaddend. .Iadd.17. An insert assembly for an ultrasonic dental instrument comprising;

ultrasonic vibration means, for producing an output, means connected to said ultrasonic vibration means for coupling said output to a working tool, and working tool means connected to said connecting means;

a hollow sleeve coupled to and surrounding said connecting means, a portion of said connecting means extending through said hollow sleeve a spaced distance from the internal wall of said hollow sleeve to thereby form an annular space between said sleeve and said connecting means; and

nozzle means mounted between said sleeve and said connecting means in proximity to said tool means. .Iaddend. .Iadd.18. The insert assembly of claim 17 wherein said nozzle means comprises a bushing mounted internally in said hollow sleeve and surrounding said connecting means, said bushing having an internal diameter such that an annular space is formed between said bushing and said connecting means thereby providing an annular nozzle. .Iaddend.