Dental spray handpiece

Claim 2

Dental spray handpiece comprising a gripping sleeve having a detachable and interchangeable media inlet connecting piece insertable at one end thereof and a media discharge arrangement at the other end thereof; air and water media conduits in said gripping sleeve leading from the media inlet connecting piece to the media discharge arrangement, said media connecting piece including connectors for media consisting of air and water; an air-shutoff valve for air being arranged in the media conduit for air, a branch line for air in said connecting piece branching off from the media conduit for air downstream of said air-shutoff valve, and said connecting piece possessing the connectors for air and water being provided with a dummy plug for sealing off said branch air line.

Claim 3

Dental spray handpiece comprising a gripping sleeve having a detachable and interchangeable media inlet connecting piece insertable at one end thereof and a media discharge arrangement at the other end thereof; air and water media conduits in said gripping sleeve leading from the media inlet connecting piece to the media discharge arrangement, said media connecting piece including connectors for media consisting of air and water; said media connecting piece including an electrical power consumer with an associated current circuit constituting electrical heating means for heating of the air; an air-shutoff valve for air being arranged in the media conduit for air, a branch line for air in said connecting piece branching off from the media conduit for air downstream of said air-shutoff valve, said branch line leading to a pressure-responsive electric switch for closing a previously interrupted current circuit communicating with the heating means in response to the imposition of a pressure force.

Claim 4

Dental spray handpiece comprising a gripping sleeve having a detachable and interchangeable media inlet connecting piece insertable at one end thereof and a media discharge arrangement at the other end thereof; air and water media conduits in said gripping sleeve leading from the media inlet connecting piece to the media discharge arrangement, said media connecting piece including connectors for media consisting of air and water; said media connecting piece including an electrical power consumer with an associated current circuit constituting electrical heating means for heating of the air; an air-shutoff valve for air being arranged in the media conduit for air, a branch line for air in said connecting piece branching off from the media conduit for air downstream of said air-shutoff valve, said branch line leading to a pressure-responsive electric switch for closing a previously interrupted current circuit communicating with the heating means in response to the imposition of a pressure force.

Claim 5

Spray handpiece as claimed in claim 2, wherein the pressure-responsive electric switch is constructed unitarily with the connecting piece possessing said heating means; and said switch includes an air control connector for the branch line.

Claim 6

Spray handpiece as claimed in claim 2, wherein said electrical heating means includes a heat coil arranged in a heating tube associated with the media conduit for air.

Claim 7

Spray handpiece as claimed in claim 2, wherein said heating means is located upstream of the air-shutoff valve.

Claim 8

Spray handpiece as claimed in claim 1 or 2, wherein a current circuit is arranged in said gripping sleeve for the operation of an incandescent lamp emitting light from the region of the media discharge arrangement, said connecting piece possessing the connections for air and water being provided with two blind receiving openings for the connector ends of the current circuit.

Claim 9

Spray handpiece as claimed in claim 6, wherein said incandescent lamp is removable.

Claim 10

Spray handpiece as claimed in claim 7, wherein a cannula is detachably mounted at the end surface of the gripping sleeve towards the media discharge for air and water, said incandescent lamp being arranged at the end surface of the gripping sleeve towards the media discharge, and said cannula including a light-transmitting opening for the light emitted from said incandescent lamp.

Claim 11

Spray handpiece as claimed in claim 8, wherein said incandescent lamp is arranged within a detachable covering cap projecting from the end surface of the gripping sleeve towards the media discharge, said cap concurrently forming a plug connector extension for the cannula, with the cap having a light-permeable end distant from the handpiece.

Claim 12

Spray handpiece as claimed in claim 9, wherein said cannula is rotatably mounted on the covering cap forming the plug connector extension.

Claim 13

Spray handpiece as claimed in claim 9, wherein the end of the covering cap distant from the handpiece possesses a light-transmissive opening, with a light-conductor being located in said opening.

Claim 14

Spray handpiece as claimed in claim 9, wherein the end of said covering cap towards the handpiece is inserted into a receiving sleeve arranged on the end surface of the gripping sleeve towards the media discharge, and locking projections for locking said cap therein.

Claim 15

Spray handpiece as claimed in claim 1 or 2, wherein a water-shutoff valve is arranged in the media conduit for water.

Claim 16

Spray handpiece as claimed in claim 13, wherein said air-shutoff valve and said water-shutoff valve are arranged behind each other along a jacket line on the circumference of the gripping sleeve.

Claim 17

Spray handpiece as claimed in claim 13, wherein said two shutoff valves each includes a pushbutton depressable against the action of a return spring from a closed position into an open position, said two pushbuttons being covered by an elastic covering.

Claim 18

Spray handpiece as claimed in claim 1 or 2, wherein said media connecting piece includes an external clamping ring to provide a clamping seat in the gripping sleeve.