Patent ID: 9538891
Date: 2017-01-10
CPC Classifications: A47L,B01D,B04C

Claim:
1. A vacuum cleaner comprising: a housing defining a cyclonic separator chamber for separating contaminants from a dirt-containing airstream and a collection chamber for receiving contaminants separated in the separator chamber, the housing comprising: a suction nozzle fluidly connected with the inlet; and a suction source fluidly connected to the suction nozzle and to the separator chamber for establishing and maintaining a dirt-containing airstream from the suction nozzle to the inlet; wherein the helical step extends outwardly from a lower end of the upper separating chamber wall to the upper end of the lower collection chamber wall such that the circumference of the collection chamber wall is larger than the circumference of the separator chamber wall; and wherein the debris outlet is defined by an annular gap that extends continuously around the entire inner circumference of the sidewall and is spaced inwardly from the helical step.