Dental hand instrument and head housing therefor

• US 10,456,216 B2
• Filed: 08/31/2015
• Issued: 10/29/2019
• Est. Priority Date: 09/12/2014
• Status: Active Grant

• Current Assignee: Kavo Dental GMBH (Envista Holdings Corporation)
• Original Assignee: Kaltenbach & Voigt GmbH (Danaher Corporation)
• Inventors: Kuhn, Bernhard, Classen, Thomas
• Primary Examiner(s): Patel, Yogesh P
• Assistant Examiner(s): Sparks, Stephen R
• Application Number:
  US14/840,832
• Publication Number:
  US 20160074134A1
• Time in Patent Office: 1,520 Days
• CPC Class Codes: A61C 1/0061 Air and water supply systems; Valves specially adapted therefor A61C1/052 takes precedence; rinsing or air-blowing devices A61C17/02
• CPC Class Codes: A61C 1/0076 Sterilising operating fluids or fluid supply elements such as supply lines, filters sterilisation of liquid substances in general A61L2/18
• CPC Class Codes: A61C 1/12 Angle hand-pieces
• CPC Class Codes: A61C 1/141 in an angled handpiece

Abstract

In the case of a dental hand instrument having a grip sleeve and also a head housing arranged at the front end of the grip sleeve for receiving or holding a treatment instrument, the head housing has a substantially cylindrical hollow space which is connected by way of at least one connecting bore to a connection region pointing to the grip sleeve, wherein the connecting bore is coupled, at its end facing the grip sleeve, to a media line extending through the grip sleeve, and wherein the inner wall region of the head housing enclosing the hollow space has a recess into which the connecting bore opens.

Claims

1. A dental hand instrument, comprising:

a grip sleeve having a front end;

a head housing arranged at the front end of the grip sleeve, the head housing including a substantially cylindrical hollow space and an inner wall region enclosing the substantially hollow space, the head housing configured to receive or hold a treatment instrument;

a spray insert arranged in the substantially cylindrical hollow space having two circumferential annular incisions;

a connecting bore located in the head housing having a first end facing the grip sleeve,

wherein the substantially cylindrical hollow space is connected by way of the connecting bore to a connection region pointing to the grip sleeve, and

wherein the first end of the connecting bore is coupled to a media line extending through the grip sleeve; and

a sickle-shaped recess located within the inner wall region of the head housing and into which the connecting bore opens.

2. A dental hand instrument of claim 1, wherein the connecting bore is aligned so as to be inclined with respect to a plane running perpendicularly to a longitudinal axis of the substantially cylindrical hollow space.

3. A dental hand instrument of claim 1, further comprising an insert piece arranged in the substantially cylindrical hollow space of the head housing, wherein the insert piece has a media channel communicating with the sickle-shaped recess.

4. A dental hand instrument of claim 3, wherein a height of the sickle-shaped recess corresponds to a height of the media channel.

5. A dental hand instrument of claim 1, wherein the head housing has a plurality of connecting bores, wherein each of the plurality of connecting bores opens into the sickle-shaped recess formed on the inner wall region of the head housing.

6. A head housing for a dental hand instrument for receiving or holding a treatment instrument, the head housing comprising:

a substantially cylindrical interior hollow space connected by way of at least one connecting bore to a connection region, the connecting bore and the connecting region located through the head housing grip sleeve of the hand instrument,

a spray insert arranged in the substantially cylindrical hollow space having two circumferential annular incisions, and

an inner wall region enclosing the substantially cylindrical hollow space and comprising a sickle-shaped recess into which the at least one connecting bore opens.

7. The head housing of claim 6, wherein the at least one connecting bore is aligned so as to be inclined with respect to a plane running perpendicularly to a longitudinal axis of the substantially cylindrical hollow space.

8. The head housing as claimed in claim 6, further comprising an insert piece arranged in the substantially cylindrical hollow space of the head housing, wherein the insert piece has a media channel communicating with the sickle-shaped recess.

9. The head housing as claimed in claim 7, wherein a height of the sickle-shaped recess corresponds to a height of the media channel.

10. The head housing of claim 6, wherein the head housing has a plurality of connecting bores, wherein each of the plurality of connecting bores opens into the sickle-shaped recess formed on the inner wall region.