초록 ▼

A sealed filtration cannister including a filtration mechanism sealed within the cannister. A prefilter and a HEPA filter entrap asbestos-containing dust within the sealed cannister. Upon usage of the filtration cannister for a predetermined number of hours, the cannister is disposed of in its entir

A sealed filtration cannister including a filtration mechanism sealed within the cannister. A prefilter and a HEPA filter entrap asbestos-containing dust within the sealed cannister. Upon usage of the filtration cannister for a predetermined number of hours, the cannister is disposed of in its entirety. The cannister is used in conjunction with a separate vacuum cleaner device having a suction hose communicating with a cannister lid removably mounted on top of the cannister. Alternately, the cannister is used with a portable vacuum motor assembly removably mounted on top of the cannister to provide independent suction to the filtration cannister.

대표청구항 ▼

A sealed filter device for filtering asbestos contaminated air sucked through said device comprising a sealed contact having a sealed top, bottom, and sides, whereby said sealed cannister may be adapted to be disposed of after a predetermined amount of use, filter means supported within said cannist

A sealed filter device for filtering asbestos contaminated air sucked through said device comprising a sealed contact having a sealed top, bottom, and sides, whereby said sealed cannister may be adapted to be disposed of after a predetermined amount of use, filter means supported within said cannister and spaced above said bottom, said filter means including a filter casing, a HEPA filter and a prefilter, an inlet to the interior of the cannister located upstream from said prefilter whereby particles, sucked into the sealed cannister which are too large to pass through said prefilter will collect adjacent the bottom of the sealed cannister, sealing means for sealing said inlet against passage of air out of said sealed cannister and allowing passage of air into said sealed cannister when the interior of said sealed cannister is subjected to a suction force, and outlet means for the sole egress of air from said sealed cannister being in communication with said HEPA filter for exiting air passing through said filter means.