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US 6,113,663 AGranted
Vacuum cleaner having a dual filter assembly
AssigneeShop Vac Corporation
InventorLi H. Liu
Life of this patent
Estimating the term…
Abstract
A vacuum cleaner having a dual filter assembly includes a filter cage, a primary filter disposed on the filter cage, and a secondary filter disposed downstream of the primary filter. A float valve between the primary filter and the secondary filter inhibits liquid from coming into contact with the secondary filter.
Claims11
A vacuum cleaner having a dual filter assembly comprising:
- a filter support;
- a primary filter disposed on the filter support, the primary filter having an efficiency;
- a secondary filter disposed downstream of the primary filter, the secondary filter having an efficiency higher than the efficiency of the primary filter;
- and
- a valve disposed downstream of the primary filter and upstream of the secondary filter for inhibiting liquid from coming into contact with the secondary filter.
2 more elements
A wet/dry vacuum cleaner comprising:
- a first filter cage;
- a cage base attached to the first filter cage;
- a primary filter disposed on the first filter cage, the primary filter having an efficiency;
- a secondary filter disposed on a second filter cage, inside of the cage base, downstream of the primary filter, the secondary filter having an efficiency higher than the efficiency of primary filter;
- and
- a float ball disposed inside of the first filter cage, downstream of the primary filter and upstream of the secondary filter, for inhibiting fluid from coming into contact with the secondary filter.
3 more elements
Dependencies are inferred from the claim text.