US5207614A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Clean room air system
Assignee: BROD & MCCLUNG - PACE Co A Corp OF OR
•
Filing: 1991-11-07
•
Granted: 1993-05-04
•
Expires: 2011-11-07
Abstract
Abstract A clean room is supplied with air at a controllable velocity from a blower with a variable damper mechanism. The ceiling of the clean room is comprised of a plurality of panels of particulate filter material Associated with at least some of the panels are air dampers comprised of first, second, and third adjacent perforated plates. The first plate is fixed and the second plate is mounted for translational movement relative to the first. The third plate is interposed between the first and second plates as a gasket to reduce air flow between the plates. By moving the second plate relative to the first, the perforations therein are selectably opened or occluded, permitting the air passing through each panel to be regulated. Air flow through the room as a whole is controlled by the variable air flow feature of the blower.
Inventors
- 👤 Albert M. Passadore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 05:27
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/08; F24F13/10; F24F13/12; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86718; Y10T137/86734; Y10T137/86759
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
112 words
A damper for a clean room ventilation system comprising: a first plate provided with a plurality of perforations; a second plate provided with a plurality of perforations, the second plate mounted to the first plate and movable between a first positions in which the perforations of the first plate are aligned with the perforations of the second plate and a second position in which the perforations of the first plate are not aligned with the perforations of the second plate; and a gasket plate provided with a plurality of perforation, the gasket plate interposed between the first and second plates to restrict the flow of air between the first and second plates.
Claim 2
Dependent Claim
112 words
A damper for a clean room ventilation system comprising: a first plate provided with a plurality of perforations; a second plate provided with a plurality of perforations, the second plate mounted to the first plate and movable between a first positions in which the perforations of the first plate are aligned with the perforations of the second plate and a second position in which the perforations of the first plate are not aligned with the perforations of the second plate; and a gasket plate provided with a plurality of perforation, the gasket plate interposed between the first and second plates to restrict the flow of air between the first and second plates.
Claim 3
Dependent Claim
17 words
The damper of claim 1 wherein the gasket plate is made of ultra high molecular weight polyethylene.
Claim 4
Dependent Claim
17 words
The damper of claim 1 further comprising tension means for creating a bow in the second plate.
Claim 5
Dependent Claim
101 words
A damper for ventilation system comprising: a first plate having a hole; a second plate mounted to the first plate and movable between a first position and a second position, the second plate obstructing the hole when in the first position; a gasket plate interposed between the first plate and the second plate to limit the flow of air between the first and second plates; and a rod under tension which extends across one dimension of the second plate causing the second plate to bow in the direction of the first plate for biasing the second plate toward the first plate.
Claim 6
Dependent Claim
101 words
A damper for ventilation system comprising: a first plate having a hole; a second plate mounted to the first plate and movable between a first position and a second position, the second plate obstructing the hole when in the first position; a gasket plate interposed between the first plate and the second plate to limit the flow of air between the first and second plates; and a rod under tension which extends across one dimension of the second plate causing the second plate to bow in the direction of the first plate for biasing the second plate toward the first plate.
Claim 7
Dependent Claim
14 words
The damper of claim 4 wherein the gasket is formed from a resilient material.
Claim 8
Dependent Claim
15 words
The damper of claim 5 wherein the resilient material is ultra high molecular weight polyethylene.
Claim 9
Dependent Claim
138 words
A damper for a clean room ventilation system comprising: a first plate having a plurality of apertures arranged in a predetermined pattern; a second plate having a plurality of apertures arranged in the same predetermined pattern, the second plate mounted to the first plate and movable between a first position in which the apertures of the first plate and the second plate are aligned and a second position in which the apertures of the first plate are obstructed by the second plate; a gasket plate formed of a resilient material interposed between the first plate and the second plate; and a rod extending across one dimension of the second plate, the rod being under tension so as to introduce a bow in the second plate and bias the second plate and the gasket plate toward the first plate.
Claim 10
Dependent Claim
138 words
A damper for a clean room ventilation system comprising: a first plate having a plurality of apertures arranged in a predetermined pattern; a second plate having a plurality of apertures arranged in the same predetermined pattern, the second plate mounted to the first plate and movable between a first position in which the apertures of the first plate and the second plate are aligned and a second position in which the apertures of the first plate are obstructed by the second plate; a gasket plate formed of a resilient material interposed between the first plate and the second plate; and a rod extending across one dimension of the second plate, the rod being under tension so as to introduce a bow in the second plate and bias the second plate and the gasket plate toward the first plate.
Claim 11
Dependent Claim
104 words
A damper for a ventilation system comprising: a first plate having a plurality of perforations; a second plate mounted to the first plate and linearly movable between a first position and a second position, the second plate obstructing the plurality of perforations when in the first position; a gasket plate interposed between the first plate and the second plate to limit the flow of air between the first and second plates; biasing means for biasing the second plate toward the first plate; and means for moving the second plate linearly with respect to the first plate from the first position to the second position.
Claim 12
Dependent Claim
104 words
A damper for a ventilation system comprising: a first plate having a plurality of perforations; a second plate mounted to the first plate and linearly movable between a first position and a second position, the second plate obstructing the plurality of perforations when in the first position; a gasket plate interposed between the first plate and the second plate to limit the flow of air between the first and second plates; biasing means for biasing the second plate toward the first plate; and means for moving the second plate linearly with respect to the first plate from the first position to the second position.
References Cited (Backward Citations)
GB764095A
Cited
US2971351A
Cited
US3308741A
Cited
US3440946A
Cited
US3518814A
Cited
US3506238A
Cited
US3465666A
Cited
US3528359A
Cited
US3986850A
Cited
US4253769A
Cited
US4407187A
Cited
GB2119440A
Cited
US4666477A
Cited
US5014608A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-05-03 | 1996-11-02 | 1997-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-05-03 | 2000-11-02 | 2001-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-05-03 | 2004-11-02 | 2005-05-04 | $7700.00 | Window Closed / Lapsed |