Dust collector for dental technician

Abstract

A collector of dental scrapings and dust for use by a dental technician. The collector consists of a main housing which is provided with a dust inlet at the lower portion of its front side and which has an open rear side normally closed by a filtering cover provided with a plurality of vent holes and on which is secured an air-permeable foamed plastic sheet for dust collection. A partition wall is provided in said main housing to divide the interior thereof into a suction portion leading from the inlet and an exhaust portion leading to the filtering cover. An electric blower is provided between said suction portion and said exhaust portion to cause air flow from said suction portion to said exhaust portion. The suction portion is provided with a forwardly concave first, relatively short, metal grating of suitable mesh size which is coextensive in width with the inlet and whose length is approximately 1.5 times the vertical height of the inlet, and with a forwardly concave second, relatively long, metal grating having a mesh size and width identical with the first grating and whose length is approximately twice the vertical height of the inlet. The short and long gratings are connected together at their front edges by means of binding clips of U-shaped cross-section having outwardly vertically extending stop flanges engageable with opposing top and bottom transverse positioning bars secured respectively to the upper and lower walls of the suction portion close to the inlet of the device, the connected gratings being under sufficient tension to hold them in place at said positioning bars.

Dependencies are inferred from the claim text.