Abstract: The present invention includes a foldable, impact resistant apparatus for protecting glass panels from projectile strikes. The object of this invention is to provide a unitary collapsible and foldable structure formed to provide impact protection to otherwise fragile glass of any window structure whether for a vehicle or a building. A further object is for the apparatus is to be easily deployed by a single person, easily folded away from the window structure or removed collapsed and folded for storage.

Abstract: A manual drive endodontic handpiece includes a housing having proximal end and a distal end provided with an angle head which receives a dental tool. A drive shaft extends through the housing and is coupled to a manual driver such that rotational movement of the manual driver causes rotational movement of the shaft. A pinion gear is provided at the distal end of the drive shaft and enters into the angle head. Rotation of the manual driver relative to the housing causes rotational movement of the pinion gear at the distal end of the shaft. A dental tool provided in the angle head has a head that includes a pinion gear which meshes with the pinion gear at the distal end of the shaft and is rotated by rotational movement of the pinion gear at the distal end of the shaft. According to one embodiment, the housing is provided with windows through which the manual driver may be directly rotated.