US3895570A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air-insulated work station
Assignee: Baker and Co Inc
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Filing: 1973-09-27
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Granted: 1975-07-22
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Expires: 1993-09-27
Abstract
Abstract A work station having a work space bounded by an air duct system. Air is sucked out of the ducts for filtering, part of the air being circulated downwardly through the work space and back to the ducts, and the remainder vented from the system. Air passageways adjacent to an access opening permit outside air to replenish the air in the ducts, the air flows established within the station serving to insulate the work space from gaseous communication with the outside atmosphere.
Inventors
- 👤 Jr John M Eagleson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:05
CPC Classifications
B; B08; B08B; B08B15/00; B08B15/02; B08B15/023; B08B2215/00; B08B2215/003; Y; Y10; Y10S; Y10S55/00; Y10S55/18
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
251 words
An air-insulated work station comprising the combination of: bottom, side, and rear walls defining a work space, said bottom wall including a work surface for said work space, baffles cooperating with each of said walls to define air ducts exterior to said work space, a front wall having an opening providing access to said work space, blower means having an air intake from said ducts and adapted to blow air down into said work space toward said work surface, said ducts forming a return path to said blower means for air which has passed through said work space, said work surface being perforated and at least one of said air ducts provided with air passageways to admit air respectively from said work space and from outside of said work station into said ducts, exhaust means adapted to vent some of the air in said ducts from said work station, and thereby establish a flow of air from outside of said work station through said air passageways and into said air ducts to replenish the vented air, and filter means in the path of air impelled by said blower means for removing contaminants therein, said filter means intermediate said blower means and both said work space and said exhaust means, the air flow produced within said ducts serving to insulate said work space from gaseous communication with the outside atmosphere resulting from leaks of unfiltered gas into said ducts, by passing substantially all the gas in said ducts through said filter means.
Claim 2
Dependent Claim
251 words
An air-insulated work station comprising the combination of: bottom, side, and rear walls defining a work space, said bottom wall including a work surface for said work space, baffles cooperating with each of said walls to define air ducts exterior to said work space, a front wall having an opening providing access to said work space, blower means having an air intake from said ducts and adapted to blow air down into said work space toward said work surface, said ducts forming a return path to said blower means for air which has passed through said work space, said work surface being perforated and at least one of said air ducts provided with air passageways to admit air respectively from said work space and from outside of said work station into said ducts, exhaust means adapted to vent some of the air in said ducts from said work station, and thereby establish a flow of air from outside of said work station through said air passageways and into said air ducts to replenish the vented air, and filter means in the path of air impelled by said blower means for removing contaminants therein, said filter means intermediate said blower means and both said work space and said exhaust means, the air flow produced within said ducts serving to insulate said work space from gaseous communication with the outside atmosphere resulting from leaks of unfiltered gas into said ducts, by passing substantially all the gas in said ducts through said filter means.
Claim 3
Dependent Claim
27 words
The work station of claim 1, wherein said air passageways are distributed along the forward edge of each of the air ducts defined by said side walls.
Claim 4
Dependent Claim
33 words
The work station of claim 2, wherein air passageways are provided adjacent to said access opening to inhibit the flow of gas into or out of said work space through said access opening.
Claim 5
Dependent Claim
37 words
The work station of claim 3, wherein said blower means, exhaust means, and air passageways are adapted to produce an air flow velocity into said air passageways of from about 50 to about 100 feet per minute.
Claim 6
Dependent Claim
112 words
The work station of claim 3, and further including a partition slideable between first and second positions respectively covering and revealing said access opening, an enclosure for said partition mounted on said front wall, said partition slideably lodged in said enclosure through a slit in the lower portion thereof, said front wall defining an air duct exterior to said work space, said air duct providing an air intake to said blower means, and air passageways between said partition enclosure and said front wall air duct, said blower means adapted to impel gas in said partitiOn enclosure through said air passageways and said front wall air duct and thence to said filter means.
Claim 7
Dependent Claim
40 words
The work station of claim 1, wherein said filter means comprises a first filter disposed in the path of air blown into said work space and a second filter disposed in the path of air vented through said exhaust means.
Claim 8
Dependent Claim
74 words
The work station of claim 6, wherein said front wall defines an air duct exterior to said work space, said front wall duct providing an air intake to said blower means, and including a plenum supplied by said blower means and surrounded by said blower means, filter means, and said front, side, and rear air ducts, whereby any unfiltered gas escaping from said plenum is returned thereto through said ducts by said blower means.
Claim 9
Dependent Claim
72 words
The work station of claim 1, wherein the perforations in said work surface are distributed along the forward and rear portions of said work surface, and including means to direct a greater air flow rate from said blower to the forward and rear portions of said work space than to the central portion thereof, thereby inhibiting the flow of gas outwardly to the front or rear from said central work space portion.
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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) | 1978-07-21 | 1979-01-20 | 1979-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-21 | 1983-01-20 | 1983-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-21 | 1987-01-20 | 1987-07-22 | $7700.00 | Window Closed / Lapsed |