Patent US4911191A successfully refreshed from Google Patents.
US4911191A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for protecting ceiling work area from dispersal of asbestos fibers
Assignee: Individual
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Filing: 1989-04-12
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Granted: 1990-03-27
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Expires: 2009-04-12
Abstract
Abstract A containment apparatus for confining asbestos fibers and the like floating in the air adjacent to a ceiling work area as a consequence of removing or repairing asbestos containing ceiling material. A substantially fiber-tight bag of flexible material has an open top adapted for positioning in close proximity to a friable ceiling substrate, or for fitting tightly against a stable ceiling substrate, in surrounding relation to the ceiling area to be worked upon and is supported in such position by an apparatus which in turn rests on the floor beneath the ceiling. One or more gloves of flexible material are sealed to openings in the bag, and each glove is adapted for providing protected access to the interior of the bag for the hand and arm of a user. At least a major portion of the bag is automatically transparent so that a user having one or both hands inserted in the gloves can view the area of the ceiling being worked upon from outside the bag. A sub-atmospheric condition is maintained within the bag to prevent unwanted escape of asbestos fibers.
Inventors
- 👤 G. William Bain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:31
CPC Classifications
B; B08; B08B; B08B15/00; B08B15/02; B08B15/026; E; E04; E04G; E04G21/00; E04G21/24; E04G21/243; Y; Y10; Y10S; Y10S135/00; Y10S135/90; Y10S52/00; Y10S52/02
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
131 words
A containment for asbestos fibers and the like floating in the air adjacent to a ceiling as a consequence of removing or repairing materials on or near the ceiling, comprising a substantially fiber tight bag of flexible material having an open top adapted for placement in a position fitting in close proximity to a ceiling in surrounding relation to the ceiling area to be worked upon; support means formed for removably holding said bag in the desired position relative to said ceiling; sealing means on said open top of said bag adapted for cooperating with said ceiling to confine asbestos fibers; and glove means of flexible material sealed to said bag and adapted for providing protected access to the interior of said bag for the hand and arm of a user.
Claim 2
Dependent Claim
131 words
A containment for asbestos fibers and the like floating in the air adjacent to a ceiling as a consequence of removing or repairing materials on or near the ceiling, comprising a substantially fiber tight bag of flexible material having an open top adapted for placement in a position fitting in close proximity to a ceiling in surrounding relation to the ceiling area to be worked upon; support means formed for removably holding said bag in the desired position relative to said ceiling; sealing means on said open top of said bag adapted for cooperating with said ceiling to confine asbestos fibers; and glove means of flexible material sealed to said bag and adapted for providing protected access to the interior of said bag for the hand and arm of a user.
Claim 3
Dependent Claim
43 words
A containment as described in claim 1, and wherein a major portion of said bag is substantially transparent whereby a user having a hand inserted in said glove means can view the area of the ceiling being worked upon from outside said bag.
Claim 4
Dependent Claim
18 words
A containment as described in claim 2, and wherein said bag is formed of transparent flexible sheet plastic.
Claim 5
Dependent Claim
31 words
A containment as described in claim 2, and wherein said glove means comprises a pair of flexible gloves sealed to said bag in position to accommodate both hands of a user.
Claim 6
Dependent Claim
18 words
A containment as described in claim 4, and wherein the material of said gloves comprises thin flexible plastic.
Claim 7
Independent Claim
132 words
An apparatus for confining asbestos fibers and the like floating in the air adjacent to a ceiling as a consequence of removing or repairing ceiling materials, comprising a flexible bag having an open top adapted to be positioned adjacent to a ceiling in surrounding relation to a desired area to be worked upon; support means adapted for resting on a floor below said ceiling and formed for supporting said bag at desired elevations above said floor; height regulating means on said support means formed for moving said bag toward and away from said ceiling; and glove means of flexible material sealed to said bag and extending into the interior thereof, said glove means being adapted for receiving and protecting a hand and a portion of an arm inserted into said glove means.
Claim 8
Independent Claim
132 words
An apparatus for confining asbestos fibers and the like floating in the air adjacent to a ceiling as a consequence of removing or repairing ceiling materials, comprising a flexible bag having an open top adapted to be positioned adjacent to a ceiling in surrounding relation to a desired area to be worked upon; support means adapted for resting on a floor below said ceiling and formed for supporting said bag at desired elevations above said floor; height regulating means on said support means formed for moving said bag toward and away from said ceiling; and glove means of flexible material sealed to said bag and extending into the interior thereof, said glove means being adapted for receiving and protecting a hand and a portion of an arm inserted into said glove means.
Claim 9
Dependent Claim
30 words
An apparatus as described in claim 6, and wherein evacuation means is connected to said bag and is formed for creating a lower than atmospheric pressure condition in said bag.
Claim 10
Dependent Claim
52 words
An apparatus as described in claim 7 and wherein said evacuation means comprises a power driven motor and exhaust fan, a flexible hose communicating said exhaust motor and fan with the interior of said bag, and filter means for removing asbestos fibers and the like from air passing through said exhaust fan.
Claim 11
Dependent Claim
44 words
An apparatus as described in claim 6, and wherein at least a portion of said bag is substantially transparent whereby a user having a hand inserted in said glove means can view the area of the ceiling being worked upon from outside said bag.
Claim 12
Dependent Claim
18 words
An apparatus as described in claim 9, and wherein said bag is formed of transparent flexible sheet plastic.
Claim 13
Dependent Claim
31 words
An apparatus as described in claim 9, and wherein said glove means comprises a pair of said gloves sealed to said bag in position to accommodate both hands of a user.
Claim 14
Dependent Claim
18 words
An apparatus as described in claim 11, and wherein the material of said gloves is thin flexible plastic.
Claim 15
Dependent Claim
23 words
An apparatus as described in claim 6, and wherein said support means is mounted on wheels for precise lateral positioning of the unit.
Claim 16
Dependent Claim
37 words
An apparatus as described in claim 6, and wherein said support means provides a telescoping substantially vertical standard having a horizontally extending rack on its upper end formed for receiving the upper edge of said flexible bag.
Claim 17
Dependent Claim
37 words
An apparatus as described in claim 14, and wherein pulley means is provided on said support means for extending and contracting said telescoping standard vertically so as to move said rack toward and away from the ceiling.
Claim 18
Dependent Claim
32 words
An apparatus as described in claim 14, and wherein said vertical standard is provided with a pair of laterally extending angularly spaced outrigger frames having floor engaging members at their outer ends.
Claim 19
Dependent Claim
27 words
An apparatus as described in claim 16, and wherein said outrigger frames and said rack are formed to fold flat for maneuvering and storage of the unit.
Claim 20
Dependent Claim
51 words
An apparatus as described in claim 14, and wherein a liquid reservoir is mounted on said standard, a manually operable stirrup pump is provided in said reservoir, said reservoir is connected by a flexible tube to the interior of said bag, and a spray gun is attached to said flexible tube.
Claim 21
Dependent Claim
34 words
An apparatus as described in claim 6, and wherein sealing means is provided at the open top of said containment bag for cooperating with said ceiling to confine asbestos fibers within said containment bag.
Claim 22
Dependent Claim
26 words
An apparatus as described in claim 9, and wherein said sealing means comprises a flexible semi-tubular resilient member partially encircling the horizontal members of said rack.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-03-26 | 1993-09-25 | 1994-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-03-26 | 1997-09-25 | 1998-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-03-26 | 2001-09-25 | 2002-03-27 | $7700.00 | Window Closed / Lapsed |