Microsonic Gmbh

Other

Miklos Major

A syringe assembly specifically designed to dispense high viscosity material. The syringe assembly includes a syringe barrel into which the high viscosity material is placed. A piston assembly is introduced into the syringe barrel. The piston assembly creates a seal against the interior of the syringe barrel that is impervious to the high viscosity material but is not impervious to the passage of air. Consequently, as the piston assembly is advanced into the syringe barrel, any trapped air is permitted to exit the syringe barrel without passing through the high viscosity material. The piston assembly also contains a shaped piston head that stresses the high viscosity material as it is displaced through the syringe barrel. By stressing the high viscosity material in the syringe barrel before it is dispensed, air bubbles and gaps contained within the material can be greatly reduced. Consequently, as the high viscosity material is dispensed from the syringe assembly, a homogenous mix is produced that contains very few air bubbles and gaps.

Syringe device having a vented piston

Container for holding impression material

A hearing aid tubing connector for connecting sound conduction tubing from a hearing aid to an earmold and a method for making same wherein the sound conduction tubing extends completely through a bore in the earmold up to the interior opening of the bore near the eardrum. A connector circumferentially attached to the tubing and having a stepped portion engaging the wall of said bore connects in an acoustic seal the tubing to the exterior opening of the bore in the earmold. The tubing extending through the bore in the earmold has an interior diameter which increases between the exterior opening of the bore and the interior opening of the bore. This increase in the tubing may be continuous or stepped. The tubing may be made of PVC and the earmold may be made of silicone.

Hearing aid tubing connector

The present invention proves an elbow shaped connector for connecting flexible sound conduction tubing from a hearing aid to a conventional earmold. The sound bore of the connector has an increasing diameter to improve high frequency response. This increase in diameter may be gradual, over the length of the connector, or it may occur abruptly at some point within the connector.

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Ambridge, PA, United States of America

Miklos Major