Abstract: A water bottle adapter (6) fits securely onto a water bottle (1) which is used to isolate the water within the bottle from a common water supply. The adapter (6) is fastened to a mating device by means of a threaded neck (7). The neck (7) includes two longitudinal tensioning ribs (37) that promote a retaining function between the neck (7) and any device that has been affixed to the neck (7). A pressure relief valve (13) having a valve stem (14) is formed within the lid (8) of the adapter (6) to permit the escape of air from the bottle (1) when in use. A series of ribs (19) is formed within a bore containing the valve stem (14) to dampen noise produced by the operation of the valve (13).

Abstract: A rubber dam (1) used for protecting a patient (2) during dental procedures. The dam (1) includes a symmetrical round frame (3) which supports a flexible membrane (11). A prepunched hole (19) located approximately 0.5 inch from the membrane center (18) permits rotation of the frame (3) in order to position the hole (19) over the desired tooth (13) without causing the relative position of the frame (3) with respect to the patient's face to be substantially altered.

Abstract: The present invention refers to a disposable saliva ejector (1) for suction of different fluids being present in a dental treatment. The saliva ejector (1) includes a number of stiff section members (10), a connection tube (12) and a suction screen (14). Using a ball-shaped portion in a first end and a corresponding cup-shaped cavity in a second end for connection of the different elements (10, 12 and 14), it is additionally possible by application of a certain minimum force to form the saliva ejector (1) into some desired bent shape before it is inserted into the mouth of a patient to be treated. A saliva ejector is effected which does not contain any further stiffening by metal and therefore a disposable saliva ejector is provided fabricated from only one material for simple destruction and possible recycling of the material.