Saliva ejector tip with integral valve

Details Saliva ejector tip with integral valve Saliva ejector tip with integral valve

1990-11-01

1992-05-19

O'Connor, Cary E.

Dentistry

Apparatus

Having suction orifice

1375124, 604119, A61C 1706

Patent

active

051143429

ABSTRACT:
A saliva ejector tip for dental use comprises a tube (10) with a pliable, flexible tip. The end (26) of the tip is flat. The sides of the tip adjacent the end extend down to form a cage (22) of spiral mullions which terminate at a solid base portion of the tip. Extending axially inside the tip from the end is an internal plunger (24). Below the plunger on the inside is an annular valve seat (28). When the end is pushed in, the cage collapses and the plunger is pushed into the valve seat which it closes off so as to close the tip. In this manner the tip can be closed with one hand when it is removed from the mouth, thereby to avoid a sucking sound, and the need for the dentist to handle and contaminate the more proximal hose and hose valve, which are difficult to sterilize. The mullions of the cage can be extended down over the base of the tip (FIG. 4) to provide lands (32) on the base for an easier grip and saliva routing action.

REFERENCES:
patent: 3490488 (1970-01-01), Grist
patent: 3586068 (1971-06-01), Nicholson
patent: 3841308 (1974-10-01), Tate
patent: 4534542 (1985-08-01), Russo

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