Indicator device for a filter, vacuum cleaner, and method of filtering a vacuum cleaner exhaust stream
First Claim
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1. An indicator device for a filter comprising:
- a filter replacement indicator that is actuatable by thermal expansion, andan actuating member including a medium configured to thermally expand so as to actuate the filter replacement indicator,wherein the actuating member includes an actuating lever that is movable in response to thermal expansion of the medium.
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Abstract
An indicator device for a filter includes a filter replacement indicator that is actuatable by thermal expansion. The indicator device can be included in a filter. Also, a vacuum cleaner including a filter having the indicator device.
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Citations
14 Claims
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1. An indicator device for a filter comprising:
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a filter replacement indicator that is actuatable by thermal expansion, and an actuating member including a medium configured to thermally expand so as to actuate the filter replacement indicator, wherein the actuating member includes an actuating lever that is movable in response to thermal expansion of the medium. - View Dependent Claims (2, 3, 4)
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5. A filter comprising:
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an indicator device having a filter replacement indicator that is actuatable by thermal expansion and an actuating member including a medium configured to thermally expand so as to actuate the filter replacement indicator, wherein the actuating member includes an actuating lever that is movable in response to thermal expansion of the medium. - View Dependent Claims (6, 7, 8, 9)
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10. A vacuum cleaner comprising:
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a filter including an indicator device having a filter replacement indicator that is actuatable by thermal expansion and an actuating member including a medium configured to thermally expand so as to actuate the filter replacement indicator, wherein the actuating member includes an actuating lever that is movable in response to thermal expansion of the medium. - View Dependent Claims (11, 12, 13)
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14. A method of filtering an exhaust air stream of a vacuum cleaner, the method comprising:
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providing a filter including an indicator device having a filter replacement indicator that is actuatable by thermal expansion and an actuating member including a medium configured to thermally expand so as to actuate the filter replacement indicator, wherein the actuating member includes an actuating lever that is movable in response to thermal expansion of the medium; disposing the filter in a path of an exhaust air stream of a suction fan of an electric vacuum cleaner; and operating the vacuum cleaner so as to provide the exhaust air stream so as to actuate the filter replacement indicator by thermal expansion.
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Specification