US5009685A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for improving the work environment in a contaminated room
Assignee: Individual
•
Filing: 1990-02-15
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Granted: 1991-04-23
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Expires: 2010-02-15
Abstract
Abstract A system for improving the work environment in a contaminated room while contaminated material, such as asbestos, is being removing therefrom, including a dressing room adjacent the contaminated room, a decontamination unit connecting the dressing room with the contaminated room through which workmen pass when entering or exiting the contaminated room, a filtered air pump for passing filtered air from within the contaminated room through an air discharge opening to the atmosphere to maintain negative air pressure within the contaminated room, a conduit connecting the contaminated room with the decontamination unit, and a filtered air pump for passing filtered air through the conduit into the decontamination unit to maintain positive air pressure within the decontamination unit and air flow therein from the decontamination unit into the contaminated room.
Inventors
- 👤 Cary L. Wilson
- 👤 John A. Graham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:23
CPC Classifications
B; B08; B08B; B08B15/00; B08B15/02; B08B15/026; E; E04; E04H; E04H1/00; E04H1/12; E04H1/1277
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
196 words
A system for improving the work environment in a contaminated room while contaminated material is being removed therefrom, the contaminated room having a door therein through which workmen enter or exit and having a first and a second air discharge opening therein, comprising: a dressing room adjacent said contaminated room providing an area in which workmen can prepare for work in the contaminated room or prepare for leaving work after working in the contaminated room, the dressing room having a door therein; a decontamination unit connecting said dressing room door with said contaminated room door through which workmen pass when entering or exiting the contaminated room; at least one filtered air pump means passing filtered air from within said contaminated room through said first air discharge opening to the exterior of said contaminated room to maintain negative air pressure within said contaminated room; a conduit connecting said contaminated room second air discharge opening with said decontamination unit; and a filter air pump means for passing filtered air through said conduit into said decontamination unit to maintain positive air pressure within said decontamination unit whereby air flow is maintained from said decontamination unit into said contaminated room.
Claim 2
Independent Claim
196 words
A system for improving the work environment in a contaminated room while contaminated material is being removed therefrom, the contaminated room having a door therein through which workmen enter or exit and having a first and a second air discharge opening therein, comprising: a dressing room adjacent said contaminated room providing an area in which workmen can prepare for work in the contaminated room or prepare for leaving work after working in the contaminated room, the dressing room having a door therein; a decontamination unit connecting said dressing room door with said contaminated room door through which workmen pass when entering or exiting the contaminated room; at least one filtered air pump means passing filtered air from within said contaminated room through said first air discharge opening to the exterior of said contaminated room to maintain negative air pressure within said contaminated room; a conduit connecting said contaminated room second air discharge opening with said decontamination unit; and a filter air pump means for passing filtered air through said conduit into said decontamination unit to maintain positive air pressure within said decontamination unit whereby air flow is maintained from said decontamination unit into said contaminated room.
Claim 3
Dependent Claim
34 words
A system for improving the work environment in a contaminated room according to claim 1 including: at least one filtered air pump within said contaminated room for filtering and circulating air within the room.
Claim 4
Dependent Claim
24 words
A system for improving the work environment in a contaminated room according to claim 1 wherein said decontamination unit includes a shower facility therein.
Claim 5
Dependent Claim
40 words
A system for improving the work environment in a contaminated room according to claim 1 wherein said decontamination unit includes a plurality of connected cells having a door between at least some of the cells through which workmen can pass.
Claim 6
Dependent Claim
28 words
A system for improving the work environment in a contaminated room according to claim 4 wherein one of said cells in said decontamination unit has a shower therein.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-04-22 | 1994-10-22 | 1995-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-04-22 | 1998-10-22 | 1999-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-04-22 | 2002-10-22 | 2003-04-23 | $7700.00 | Window Closed / Lapsed |