David S Ostreicher

6415955, Jul 9, 2002

Mar 20, 2001

09/812458

David Ostreicher - Levittown NY, 11756

B65D 3522

222 94, 222 95, 222326, 206222

The present invention discloses an apparatus for extruding plaster including a plaster pump gun and disposable containers for use therein. The containers consist of a plastic bag-like container having a predetermined amount of plaster powder contained therein and a second burstable container of water also contained therein. An alternative bag-like container is also disclosed having a first plaster containing chamber and a second water containing chamber therein separated by a thin, weak membrane or seal which may be easily ruptured. In use, the bag-like container is compressed thereby bursting the water container or membrane which wets the plaster powder which is thereafter kneaded until the desired consistency has been reached. Thereafter, the distal end of the container is compressed forming a nozzle-like end. The nozzle-like end of the container is thereafter placed into the outlet nozzle of the ejector gun and the container is placed in the bore of the gun.

20220265388, Aug 25, 2022

Feb 10, 2022

17/668580

David GALLER - Woodmere NY, US
David OSTREICHER - Oyster Bay Cove NY, US

A61C 1/06
A61C 1/08
A61C 1/14

An interproximal reduction tool and method preferably includes at least one polishing strip; at least one abrasive wheel; and a low speed and high torque dental electric motor. First, the area between two adjacent teeth is manually polished with a plurality of polishing strips. The polishing strip is held between a forefinger and thumb and moved in a horizontal plane. Each abrasive wheel preferably includes an abrasive disc and a shaft. The abrasive disc includes a disc base and abrasive material. The abrasive material is adhered to opposing sides of the disc base. It is preferable to have an annular space between an outer edge of the disc base and an outer perimeter of the annular abrasive material. The low speed/high torque motor preferably utilizes an existing dental motor and modifies the dental motor to have a preferable gear reduction of at least 16:1.