Disposable HEPA filtration device

A sealed disposable filtration device for filtering asbestos contaminated air sucked through said device comprising:

• a sealed cannister having a top, bottom, and side walls,
• inlet means to said cannister,
• exit means defined in said top for the sole egress of air from said sealed cannister,
• HEPA filter means secured in said cannister between said top and said bottom and surrounding said exit means whereby air sucked through said inlet means and exhausted through said exit means must pass through said HEPA filter means and substantially all asbestos contamination will be entrapped in said sealed cannister, whereby said sealed cannister may be adapted to be disposed of after a predetermined amount of use, and
• cover means being mounted on said cannister and spaced above said top to define an air space between said top and said cover means within which suction is created on said filter means.

A sealed disposable filtration device for filtering asbestos contaminated air sucked through said device comprising:

• a sealed cannister having a top, bottom, and side walls,
• inlet means to said cannister,
• exit means defined in said top for the sole egress of air from said sealed cannister,
• HEPA filter means mounted above said top and in sealed communication with said exit means whereby air sucked through said inlet means and through said exit means must pass through saisd HEPA filter means and whereby said sealed cannister may be adapted to be disposed of after a predetermined amount of use, and
• cover means being mounted on said cannister and spaced above said top to define an air space located between said top and said cover means within which suction is created on said filter means.

A filter system for filtering asbestos contaminated air sucked through said system comprising:

• first and second separately sealed cannisters having separate air flow paths therethrough, each of said sealed cannisters having an inlet and an outlet and a top, bottom, and sides, and each of said two sealed cannisters being adapted to be disposed of after a predetermined amount of use,
• filter means supported within each of said two sealed cannisters, said second sealed cannister having a finer filtering media than the first sealed cannister,
• said inlet to the interior of said second sealed cannister being located upstream from its filtering media,
• said outlet of said second sealed cannister being defined in its top and being in sealed air flow communication with its filter means to ensure filtration of all air exiting said second sealed cannister,
• cover means mounted on said second sealed cannister and spaced above its top to define an air space between its top and said cover means within which suction is created on its filter means, and
• air flow communication means extending between said inlet of said second sealed cannister and said outlet of said first sealed cannister for providing sealed air flow between said two sealed cannisters so that when a suction force is applied to said outlet of said second sealed cannister, air is drawn into said inlet of said first sealed cannister and filtered in said first sealed cannister prior to passing through said air flow communication means and being filtered in said second sealed cannister and sucked out said outlet of said second sealed cannister.

A disposable filtration device for collecting asbestos particulate and filtering sbestos contaminated air sucked through said device comprising:

• an open top container,
• a sealed compartment located in said container spaced below a top edge of said container for receiving asbestos particulate and having a prefilter therein,
• an inlet to the interior of said sealed compartment whereby asbestos particulate can be sucked into said compartment for collection therein,
• a filter means including a HEPA filter supported within said sealed compartment whereby air sucked into the sealed compartment is first filterd by said prefilter and then filtered by said HEPA filter,
• outlet means in air flow communication with said sealed compartment and said filter means whereby air sucked into said sealed compartment must pass in sequence first through said prefilter, then through said filter means, and finally through said outlet means, and
• cover means being mounted on said container to define an air space between said sealed compartment and said cover means within which suction is created on said filter means.