Patent US4946484A successfully refreshed from Google Patents.
US4946484A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Support for clean room ceiling grid system
Assignee: Donaldson Co Inc
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Filing: 1988-02-05
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Granted: 1990-08-07
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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
- 👤 Donald R. Monson
- 👤 James A. LeBlanc
- 👤 Joseph C. Tokar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:01
CPC Classifications
E; E04; E04B; E04B9/00; E04B9/02; F; F24; F24F; F24F13/00; F24F13/28
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
252 words
A system for providing an airtight/particle tight hermetically sealed clean room environment from which air is passed through a filter panel, said system having a plurality of filter panel supporting grid members defining filter panel receiving apertures, each of said grid members comprising: (a) a structural upper section including mounting means for installing said grid member in the clean room; and (b) an elongate vertically oriented filter panel mounting lower section connected to and extending from said structural upper section having detent means movable between a first compressed position permitting a filter panel having a frame supporting flange to be inserted into and removed from said filter panel supporting grid member and a second extended position at which said detent means operably supports the filter panel beneath said structural upper section and lateral to said elongate vertically oriented filter panel mounting lower section; the detent means comprising a spring clip having an anchoring section and a selectively compressible filter panel engaging section, said anchoring section having a generally U-shaped cross section and means for anchoring said spring clip onto said grid member filter panel mounting lower section, said selectively compressible filter panel engaging section having top and bottom ends, said bottom end being attached to said anchoring section, and said top end being resiliently bent away from said grid member filter panel mounting lower section so that the filter panel may be selectively and readily inserted into, supported by, and removed from said filter panel supporting grid member from a location therebeneath.
Claim 2
Independent Claim
252 words
A system for providing an airtight/particle tight hermetically sealed clean room environment from which air is passed through a filter panel, said system having a plurality of filter panel supporting grid members defining filter panel receiving apertures, each of said grid members comprising: (a) a structural upper section including mounting means for installing said grid member in the clean room; and (b) an elongate vertically oriented filter panel mounting lower section connected to and extending from said structural upper section having detent means movable between a first compressed position permitting a filter panel having a frame supporting flange to be inserted into and removed from said filter panel supporting grid member and a second extended position at which said detent means operably supports the filter panel beneath said structural upper section and lateral to said elongate vertically oriented filter panel mounting lower section; the detent means comprising a spring clip having an anchoring section and a selectively compressible filter panel engaging section, said anchoring section having a generally U-shaped cross section and means for anchoring said spring clip onto said grid member filter panel mounting lower section, said selectively compressible filter panel engaging section having top and bottom ends, said bottom end being attached to said anchoring section, and said top end being resiliently bent away from said grid member filter panel mounting lower section so that the filter panel may be selectively and readily inserted into, supported by, and removed from said filter panel supporting grid member from a location therebeneath.
Claim 3
Dependent Claim
20 words
A device according to claim 1 wherein said spring clip filter panel engaging section top end is constructed of plastic.
Claim 4
Dependent Claim
63 words
A system according to claim 1 wherein said spring clip anchoring section comprises at least one generally horizontally oriented protrusion constructed and arranged for mating engagement in at least one oppositely disposed notch in said grid member filter panel mounting lower section; said engagement providing means for supporting the weight of a filter panel mounted on said spring clip filter panel engaging section.
Claim 5
Dependent Claim
53 words
A system according to claim 1 further comprising a filter panel having sidewalls with vertically oriented ramped protrusions thereon; said ramped protrusions each having an apex portion substantially adjacent each detent means spring clip filter panel engaging section to facilitate removal of a mounted filter panel from said filter panel supporting grid member.
Claim 6
Dependent Claim
96 words
A system according to claim 1 wherein said structural upper section mounting means comprises: (a) two vertically oriented sidewall members each having a top end and a bottom end; each of said top ends being angled generally perpendicularly toward said opposing sidewall member, said angled top ends defining a space therebetween permitting placement of ceiling attaching means therein; and (b) an upper horizontal cross member and a lower horizontal cross member each positioned between said sidewall members; said cross members and said sidewall members forming a grid member upper chamber having a generally rectangular cross section.
Claim 7
Dependent Claim
55 words
A system according to claim 5 wherein at least one of said sidewall member bottom ends comprises a grid member sealing portion which extends below said lower horizontal cross member; said sealing portion providing a knife edge sealing means in cooperation with a filter panel supported by said filter panel supporting grid member detent means.
Claim 8
Dependent Claim
41 words
A system according to claim 1 further comprising a filter panel having a frame supporting flange constructed and arranged as a laterally protruding upper circumferential flange for supporting said filter panel on said detent means filter panel engaging section top end.
Claim 9
Dependent Claim
51 words
A system according to claim 7 wherein said upper circumferential flange is generally U-shaped in cross section having first and second walls defining an annular sealant trough therebetween; said annular sealant trough comprising means for hermetically sealing said filter panel in cooperation with said filter panel supporting grid member sealing portion.
Claim 10
Dependent Claim
45 words
A system according to claim 7 wherein each of said filter panels includes sidewalls and a lower circumferential flange; said sidewalls extending between said upper circumferential flange and said lower circumferential flange, and said filter panel sidewalls defining a circumferential volume between adjacent filter panels.
Claim 11
Dependent Claim
60 words
A system according to claim 9 wherein said lower circumferential flange comprises: (a) a substantially vertically oriented lower edge member protruding downwardly from said lower circumferential flange; said lower edge member comprising lower sealing means; and (b) an angled surface protruding downwardly from said lower circumferential flange; said angled surface constructed and arranged for conformal mating with a filter cap.
References Cited (Backward Citations)
US2792906A
Cited
US3360910A
Cited
DE1709367A1
Cited
DE1658781A1
Cited
US3782082A
Cited
US3986850A
Cited
US4233044A
Cited
US4178159A
Cited
EP0044283A2
Cited
EP0059768A1
Cited
US4461205A
Cited
US4570391A
Cited
US4511380A
Cited
US4518405A
Cited
US4639261A
Cited
US4671811A
Cited
US4555255A
Cited
US4693173A
Cited
US4678487A
Cited
US4699640A
Cited
US4608066A
Cited
JPH093515A
Cited
JPH093516A
Cited
JPH0917A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-08-06 | 1994-02-05 | 1994-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-08-06 | 1998-02-05 | 1998-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-08-06 | 2002-02-05 | 2002-08-07 | $7700.00 | Window Closed / Lapsed |