Patent US4819549A successfully refreshed from Google Patents.
US4819549A
Expired / Lapsed
US
⏱️ 0.0 years remaining
End seal for clean room ceiling supports
Assignee: Donaldson Co Inc
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Filing: 1988-02-05
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Granted: 1989-04-11
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Expires: 2008-02-05
Abstract
Abstract A clean room ceiling grid system having a detent means for loading filter panels into ceiling grids from a clean room. The system is operable to permit removal of the filter panels by use of a filter panel removing tool. More particularly, this clean room ceiling grid system requires no plenum space use above the grid members for either installation or removal of filter panels. The system also includes means for hermetically sealing the interface of connected ceiling grid members and means for substantially laminar flow of filtered air in clean rooms.
Inventors
- 👤 Gary R. Gillingham
- 👤 Joseph C. Tokar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:29
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/0002; F; F24; F24F; F24F13/00; F24F13/28; B01D2271/00; B01D2271/02; B01D2279/00; B01D2279/50; B01D2279/51; Y; Y10; Y10T; Y10T403/00; Y10T403/47; Y10T403/70; Y10T403/7001
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
180 words
A system for providing airtight/particle tight hermetic sealing of a plurality of interfacing grid members, each of said grid members having vertically oriented and horizontally oriented wall portions defining an internal chamber, and each of said grid members comprising: (a) an aperture extending through a wall portion of said grid member, said aperture permitting infusion of caulking compound into said grid member internal chamber proximate a first end of said grid member designed for interface with another grid member; (b) a plurality of protrusions located on said first end of said grid member; said protrusions permitting caulking compound leakage past said interface; (c) caulking stop means located within said grid member internal chamber; said caulking stop means permitting a predetermined volume of caulking compound to be infused into said internal chamber; (d) whereby when said predetermined volume of caulking compound is infused into said internal chamber through said aperture, an amount of caulking compound is urged out of said internal chamber past said protrusions; and, (e) whereby said caulking compound leakage seals said interface between said plurality of grid members.
Claim 2
Independent Claim
180 words
A system for providing airtight/particle tight hermetic sealing of a plurality of interfacing grid members, each of said grid members having vertically oriented and horizontally oriented wall portions defining an internal chamber, and each of said grid members comprising: (a) an aperture extending through a wall portion of said grid member, said aperture permitting infusion of caulking compound into said grid member internal chamber proximate a first end of said grid member designed for interface with another grid member; (b) a plurality of protrusions located on said first end of said grid member; said protrusions permitting caulking compound leakage past said interface; (c) caulking stop means located within said grid member internal chamber; said caulking stop means permitting a predetermined volume of caulking compound to be infused into said internal chamber; (d) whereby when said predetermined volume of caulking compound is infused into said internal chamber through said aperture, an amount of caulking compound is urged out of said internal chamber past said protrusions; and, (e) whereby said caulking compound leakage seals said interface between said plurality of grid members.
Claim 3
Dependent Claim
64 words
A system according to claim 1 wherein said caulking stop means comprises a caulking cup, said caulking cup being constructed and arranged for insertion into said grid member internal chamber; said caulking cup including: (a) lip-shaped retaining means for conformal mating on said first end of said grid member; (b) a side portion defining an aperture, said aperture permitting infusion of caulking compound therethrough.
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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) | 1992-04-10 | 1992-10-10 | 1993-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-10 | 1996-10-10 | 1997-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-10 | 2000-10-10 | 2001-04-11 | $7700.00 | Window Closed / Lapsed |