Patent FR620649A successfully refreshed from Google Patents.
Patent US4623367A successfully refreshed from Google Patents.
US4623367A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Smoke-free work area
Assignee: Individual
•
Filing: 1986-01-21
•
Granted: 1986-11-18
•
Expires: 2006-01-21
Abstract
Abstract A smoke-free working area is described in connection with a table having a recirculating air system. The table base comprises a sealed air chamber pressurized by a motor and filter system. Openings located on the surface of the table allow air to be dispensed at a controlled rate which travels up and is collected by a network of air ducts that support a canopy. A return path for the air is fed through a hollow support member that is connected at one end to the air ducts and at the other end to the motor and filter assembly thereby completing the flow path. Smoke and other pollutants are carried into the system and filtered in a continuous fashion, thereby providing a continuous smoke-free environment for other persons located adjacent the smoke-free table area.
Inventors
- 👤 Ralph E. Paulson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:29
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/10; F; F24; F24F; F24F3/00; F24F3/12; F24F3/16; F24F3/163; E; E04; E04H; E04H1/00; E04H1/12; E04H2001/1294; Y; Y10; Y10S; Y10S55/00; Y10S55/18; Y10S55/29
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
205 words
A smoke-free work area comprising: a table having an upper and lower spaced-apart horizontal surface defining a sealed inner air chamber, a motor and filter system having a pressure end and a vacuum end and located below said table and in which said pressure end communicates with said air chamber for pressurizing said air chamber, said upper horizontal surface having a plurality of openings for releasing air from said air chamber at a controlled rate, a cover located above said table and adapted to substantially encompass the complete table for collecting and trapping air emanating from said upper horizontal surface, a hollow member having a first end and a second end and adapted to support said cover and in which said first end communicates with said vacuum end of said motor and filter system for creating a vacuum within said hollow member, and a network of air ducts cooperating with said cover and communicating with said second end of said hollow member whereby a fluid path of air is provided from said air chamber through said openings on the upper horizontal surface through the network of air ducts and through the hollow member to the motor and filter system and back to the air chamber.
Claim 2
Dependent Claim
205 words
A smoke-free work area comprising: a table having an upper and lower spaced-apart horizontal surface defining a sealed inner air chamber, a motor and filter system having a pressure end and a vacuum end and located below said table and in which said pressure end communicates with said air chamber for pressurizing said air chamber, said upper horizontal surface having a plurality of openings for releasing air from said air chamber at a controlled rate, a cover located above said table and adapted to substantially encompass the complete table for collecting and trapping air emanating from said upper horizontal surface, a hollow member having a first end and a second end and adapted to support said cover and in which said first end communicates with said vacuum end of said motor and filter system for creating a vacuum within said hollow member, and a network of air ducts cooperating with said cover and communicating with said second end of said hollow member whereby a fluid path of air is provided from said air chamber through said openings on the upper horizontal surface through the network of air ducts and through the hollow member to the motor and filter system and back to the air chamber.
Claim 3
Dependent Claim
24 words
A table according to claim 1 in which said lower horizontal surface contacts said upper horizontal surface along the periphery in a sealing relationship.
Claim 4
Dependent Claim
30 words
A table according to claim 1 which includes a variable timer connected to said motor and filter system for controlling the duration said motor is energized at any given time.
Claim 5
Dependent Claim
14 words
A table according to claim 1 in which said filters are removable and replaceable.
Claim 6
Dependent Claim
27 words
A table according to claim 1 in which said openings on said upper surface are circular and are located generally along the periphery of the upper surface.
Claim 7
Dependent Claim
34 words
A table according to claim 1 in which said openings are located in raised dimples on said upper surface whereby spilled fluid is caused to run around the dimples and away from the openings.
Claim 8
Dependent Claim
18 words
A table according to claim 1 in which said network of air ducts are located within said cover.
Claim 9
Dependent Claim
23 words
A table according to claim 1 in which said cover is soft and pliable and said network of air ducts supports said cover.
Claim 10
Dependent Claim
20 words
A table according to claim 1 in which said cover includes a network of air ducts as a integral part.
Claim 11
Dependent Claim
36 words
A table according to claim 1 in which said upper and lower horizontal surfaces are substantially rectangular and include at least two hollow members located at the corners of said horizontal surfaces for supporting said cover.
Claim 12
Dependent Claim
21 words
A table according to claim 1 in which said upper horizontal surface is movable with respect to said lower horizontal surface.
Claim 13
Dependent Claim
23 words
A table according to claim 3 in which said upper horizontal surface is movably supported a selected distance from said lower horizontal surface.
Claim 14
Dependent Claim
39 words
A table according to claim 1 in which said upper and lower horizontal surfaces are circular and in which said openings on said upper surface are located on a plurality of radii from the center of said upper surface.
Claim 15
Dependent Claim
22 words
A table according to claim 13 in which said hollow member is located at the centermost portion of said circular horizonal surfaces.
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) | 1989-11-17 | 1990-05-19 | 1990-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-11-17 | 1994-05-19 | 1994-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-11-17 | 1998-05-19 | 1998-11-18 | $7700.00 | Window Closed / Lapsed |