VACUUM APPLIANCE FILTER CONDITION INDICATOR
First Claim
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1. A filter condition indicator for a vacuum appliance having a filter, comprising:
- a housing;
a diaphragm dividing the housing into first and second chambers, the first chamber receiving a pressure indication from inside the filter, the second chamber receiving a pressure indication from outside the filter; and
an indicator device activated by movement of the diaphragm in response to a pressure differential between the first and second chambers.
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Abstract
A filter condition indicator for a vacuum appliance having a filter includes a housing with a diaphragm dividing the housing into first and second chambers. One chamber receives a pressure indication from inside the filter, and the other chamber receives a pressure indication from outside the filter. An indicator device is activated by movement of the diaphragm in response to a pressure differential between the first and second chambers.
13 Citations
12 Claims
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1. A filter condition indicator for a vacuum appliance having a filter, comprising:
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a housing;
a diaphragm dividing the housing into first and second chambers, the first chamber receiving a pressure indication from inside the filter, the second chamber receiving a pressure indication from outside the filter; and
an indicator device activated by movement of the diaphragm in response to a pressure differential between the first and second chambers. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A vacuum appliance, comprising:
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a collection drum;
a powerhead operably connected to the drum to selectively create a suction within the drum;
a filter connected to the powerhead and situated in the drum;
a housing;
a diaphragm dividing the housing into first and second chambers, the first chamber receiving a pressure indication from inside the filter, the second chamber receiving a pressure indication from outside the filter; and
an indicator device activated by movement of the diaphragm in response to a pressure differential between the first and second chambers. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification