Rotating filter feature for wet/dry vacuum cleaner
First Claim
1. A wet/dry vacuum cleaner comprising:
- a debris collection drum having a top opening;
a power head covering the top opening of said collection drum having an inlet and an outlet;
means comprising a rotating filter for filtering dust laden air suspended from said power head extending into said collection drum;
said power head having an impeller to draw dust laden air through said inlet into said collection drum, through said filtering means for removing particulate from said dust laden air and discharging said air through said outlet;
said power head including an electric motor for driving said impellet and said filter; and
means for cleaning said filter while said vacuum cleaner is in operation comprising a stationary blade for scraping an outer surface of said filter while rotating to remove accumulated globs of debris from said outer surface of said filter and drop said debris into said collection drum.
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Accused Products
Abstract
A wet/dry vacuum cleaner includes a debris collection drum having a top opening and a power head covering the top opening of the collection drum, which has an inlet and an outlet. A rotating filter filters dust laden air and is suspended from the power head extending into the collection drum. The power head has an impeller to draw dust laden air, through the inlet, into the collection drum, through the filter, to remove particulate from the dust laden air and to discharge the filtered air through the outlet. The impeller is driver by an electric motor. A stationary blade within the collection drum scrapes an outer surface of the rotating filter, while rotating, to remove accumulated globs of debris from the outer surface of the filter and drop the debris into the collection drum.
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Citations
16 Claims
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1. A wet/dry vacuum cleaner comprising:
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a debris collection drum having a top opening;
a power head covering the top opening of said collection drum having an inlet and an outlet;
means comprising a rotating filter for filtering dust laden air suspended from said power head extending into said collection drum;
said power head having an impeller to draw dust laden air through said inlet into said collection drum, through said filtering means for removing particulate from said dust laden air and discharging said air through said outlet;
said power head including an electric motor for driving said impellet and said filter; and
means for cleaning said filter while said vacuum cleaner is in operation comprising a stationary blade for scraping an outer surface of said filter while rotating to remove accumulated globs of debris from said outer surface of said filter and drop said debris into said collection drum. - View Dependent Claims (2, 3, 4, 5, 6)
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7. The wet/dry vacuum cleaner comprising:
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a debris collection drum having a top opening;
a power head covering the top opening of said collection drum having an inlet and an outlet;
means for filtering dust laden air suspended from said power head extending into said collection drum;
said power head having an impeller to draw dust laden air through said inlet into said collection drum, through said filtering means for removing particulate from said dust laden air and discharging said air through said outlet;
an electric motor for driving said impeller;
said filtering means comprising a rotating filter; and
a stationary blade for scraping an outer surface of said filter while rotating to remove accumulated globs of debris from said outer surface of said filter and drop said debris into said collection drum;
said filtering means including a rotating support cylinder with perforations, said filter surrounding said support cylinder, said support cylinder having an internal opening communicating with said impeller so that air passing through an outer surface of said filter into said support cylinder passes through said impeller and exhaust through said outlet;
an impeller shaft extending from motor down through said internal opening and out through a bottom of said support cylinder, said support cylinder having a base flange at a top end and a filter cap at a bottom end for sandwiching said filter therebetween, said support cylinder with base flange, filter cap and filter rotating as an assembly; and
a speed reduction gear box connected to said impeller shaft under said filter cap for reducing the rotational speed of said support cylinder and said filter. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A wet/dry vacuum cleaner comprising:
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a debris collection drum having a top opening;
a power head covering the top opening of said collection drum having an inlet and an outlet;
means for filtering dust laden air suspended from said power head extending into said collection drum;
said power head having an impeller to draw dust laden air through said inlet into said collection drum through said filtering means for removing particulate from said dust laden air and discharging said air through said outlet;
an electric motor for driving said impeller;
said filtering means comprising a rotating filter, and a stationary blade for scraping an outer surface of said filter while rotating to remove accumulated globs of debris from said outer surface of said filter and drop said debris into said collection drum;
said filtering means including a rotating support cylinder with perforations, said filter surrounding said support cylinder, said support cylinder having an internal opening communicating with said impeller so that air passing through an outer surface of said filter into said support cylinder passes through said impeller and exhausts through said outlet;
said support cylinder having a base flange at a top end and a filter cap at a bottom end for sandwiching said filter therebetween, said support cylinder with base flange, filter cap and filter rotating as an assembly; and
a timing gearmotor for reducing the speed of rotation of said support cylinder. - View Dependent Claims (14, 15, 16)
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Specification