초록 ▼

A vacuum cleaner includes a first housing defining a cyclonic airflow chamber and a second housing defining a main suction opening that is in communication with an inlet of the cyclonic chamber. A suction source has a suction airstream inlet in communication with an outlet of the cyclonic chamber, a

A vacuum cleaner includes a first housing defining a cyclonic airflow chamber and a second housing defining a main suction opening that is in communication with an inlet of the cyclonic chamber. A suction source has a suction airstream inlet in communication with an outlet of the cyclonic chamber, and establishes a suction airstream that enters said main suction opening, passes through said cyclonic chamber, and passes to an outlet of said suction source. A substantial portion of particulates entrained in the suction airstream are separated therefrom when said suction airstream moves in a cyclonic fashion through the cyclonic chamber. A main filter assembly, preferably including filter medium comprising polytetrafluoroethylene (PTFE), is located in the cyclonic chamber so that a suction airstream moving from the main suction opening to the inlet of said suction source by way of the cyclonic airflow chamber passes through the filter medium thereof after said airstream moves in a cyclonic fashion within the cyclonic airflow chamber to remove residual particulates from the suction airstream before it leaves the cyclonic chamber. A HEPA filter can be provided to filter the suction airstream exhausted through the outlet of the suction source prior to the airstream being discharged from the vacuum.

대표청구항 ▼

[ What is claimed is:] [1.]1. An upright vacuum cleaner comprising:an upright housing;a nozzle base hingedly interconnected with the upright housing, said nozzle base including a main suction opening in an underside thereof;a cyclonic airflow chamber defined in said upright housing and adapted for s

[ What is claimed is:] [1.]1. An upright vacuum cleaner comprising:an upright housing;a nozzle base hingedly interconnected with the upright housing, said nozzle base including a main suction opening in an underside thereof;a cyclonic airflow chamber defined in said upright housing and adapted for separating dust and dirt from an airstream, said main suction opening being in fluid communication with said cyclonic airflow chamber;an airflow source located in one of said upright housing and nozzle base and having an airflow inlet in fluid communication with said cyclonic airflow chamber and an airflow outlet;a main filter assembly located in said cyclonic airflow chamber for filtering dust and dirt from the airstream that passes through said cyclonic airflow chamber, said main filter assembly extending upwardly within said cyclonic airflow chamber from a floor of a dirt container portion of said housing that defines a lower portion of said cyclonic airflow chamber and that is adapted for receiving and retaining dirt and dust separated from said airstream;a conduit depending into said cyclonic airflow chamber from an upper wall of said housing, said conduit axially aligned and mating with an upper end of said main filter assembly whereby said main filter assembly and said conduit together define a hollow column structure in said cyclonic airflow chamber.