US4601737A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air filter system for clean room
Assignee: Individual
•
Filing: 1984-12-17
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Granted: 1986-07-22
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Expires: 2004-12-17
Abstract
Abstract A filter media contained in a rectangular frame rests on and covers the opening of an overhead rectangular support frame, preferably constructed out of metal channel bars with a resilient seal between the filter frame and the support frame and a spring loaded clamp for adjustably and releasably holding the filter frame snugly against the support frame.
Inventors
- 👤 Fred T. Gerbig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:30
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/52; B01D46/521; B01D46/10; B01D46/56; B01D46/58; B01D2265/00; B01D2265/02; B01D2265/028; B01D2279/00; B01D2279/50; B01D2279/51; Y; Y10; Y10S; Y10S55/00; Y10S55/31
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
158 words
For filtering air entering a room from a pressurized plenum above: (a) filter media sealingly enclosed around its edges in a rectangular casing located under said pressurized plenum; (b) a rigid outer frame around said filter media casing having vertical side walls, a horizontal flat rim extending inwardly from the bottom edge of said side walls, and a vertical flange extending upwardly from the inner edge of said rim; (c) a gasket comprising a strip of resilient sealing material attached to and entirely covering the outside of said rim; (d) a rectangular support frame made of rigid channel bars, said gasket covered rim of said filter frame resting on top of said support frame with said filter media covering over the entire opening defined by said support frame; and (e) clamp means attached to said support frame for engaging said frame flange for adjustably and releasably holding said gasket covered rim in airtight engagement against said support frame.
Claim 2
Dependent Claim
158 words
For filtering air entering a room from a pressurized plenum above: (a) filter media sealingly enclosed around its edges in a rectangular casing located under said pressurized plenum; (b) a rigid outer frame around said filter media casing having vertical side walls, a horizontal flat rim extending inwardly from the bottom edge of said side walls, and a vertical flange extending upwardly from the inner edge of said rim; (c) a gasket comprising a strip of resilient sealing material attached to and entirely covering the outside of said rim; (d) a rectangular support frame made of rigid channel bars, said gasket covered rim of said filter frame resting on top of said support frame with said filter media covering over the entire opening defined by said support frame; and (e) clamp means attached to said support frame for engaging said frame flange for adjustably and releasably holding said gasket covered rim in airtight engagement against said support frame.
Claim 3
Dependent Claim
38 words
The invention as described in claim 1 wherein said clamp means comprises means adjustably attached at one end to said support frame and having a lip at its opposite end for engaging the edge of said frame flange.
Claim 4
Dependent Claim
121 words
The invention as described in claim 1 wherein said clamp means comprises: (a) a clip portion having a lip at one end for engaging the edge of said frame flange and a threaded opening at its other end; (b) a bracket member fixedly attached to and extending horizontally inward from said support frame, said bracket member having an opening therethrough; (c) a threaded bolt having a head at one end and a shank, the shank extending through said bracket opening threadably engaging said clip portion opening with the bolt head at the other end of the shank spaced from said bracket; and (d) a spiral compression spring around said bolt shank between said between said bracket member and the bolt head.
Claim 5
Dependent Claim
35 words
The invention as described in claim 1 wherein a plurality of said support frames are arranged to form a latticework of rectangular openings with said filter media sealingly covering over each opening in said latticework.
Claim 6
Dependent Claim
139 words
An air filtering system for a room comprising: (a) a multiplicity of rigid channel support members interconnected to form a latticework of overhead rectangular air openings into a room; (b) a plurality of filters each comprising encased filter media sealingly enclosed in a rigid rectangular frame having vertical side walls, a horizontal flat rim extending inward from the lower edge of the side walls, a flange extending upward from the inner edge of said rim, and resilient sealing means over the outside of said rim; (c) one of said filters covering each of said lattice-work air openings with the seal covered rim resting on top of said support members; and (d) means attached to said support members for engaging the filter frame flange for adjustably and releasably holding said seal covered rim in airtight engagement against the support members.
Claim 7
Dependent Claim
139 words
An air filtering system for a room comprising: (a) a multiplicity of rigid channel support members interconnected to form a latticework of overhead rectangular air openings into a room; (b) a plurality of filters each comprising encased filter media sealingly enclosed in a rigid rectangular frame having vertical side walls, a horizontal flat rim extending inward from the lower edge of the side walls, a flange extending upward from the inner edge of said rim, and resilient sealing means over the outside of said rim; (c) one of said filters covering each of said lattice-work air openings with the seal covered rim resting on top of said support members; and (d) means attached to said support members for engaging the filter frame flange for adjustably and releasably holding said seal covered rim in airtight engagement against the support members.
Claim 8
Dependent Claim
49 words
The invention as described in claim 5 wherein: (a) adjacent air openings are formed, at least in part, by common support members with the portion of the seal covered rims along a side of the respective filters covering the respective adjacent air openings resting on said common support members.
Claim 9
Dependent Claim
155 words
For filtering air entering a room through rectangular ceiling openings in combination: (a) a filter comprising a filter media sealingly enclosed in a rigid rectangular frame, said frame having vertical side walls around the filter media, a narrow lower horizontal flat rim extending inward from the bottom of said side walls, and a flange extending part way upward from the inner edge of said rim; (b) resilient sealing means covering the outside of said rim; (c) a rectangular horizontal rigid support frame having side members defining a rectangular air entry opening whose length and width dimensions are slightly less than the corresponding dimensions of said filter frame; (d) said filter covering the support frame opening with the seal covered rim on the top of said support frame; and (e) clamp means attached to said support frame for engaging the filter frame flange for adjustably and releasably holding the filter tightly sealed against the support frame.
Claim 10
Dependent Claim
155 words
For filtering air entering a room through rectangular ceiling openings in combination: (a) a filter comprising a filter media sealingly enclosed in a rigid rectangular frame, said frame having vertical side walls around the filter media, a narrow lower horizontal flat rim extending inward from the bottom of said side walls, and a flange extending part way upward from the inner edge of said rim; (b) resilient sealing means covering the outside of said rim; (c) a rectangular horizontal rigid support frame having side members defining a rectangular air entry opening whose length and width dimensions are slightly less than the corresponding dimensions of said filter frame; (d) said filter covering the support frame opening with the seal covered rim on the top of said support frame; and (e) clamp means attached to said support frame for engaging the filter frame flange for adjustably and releasably holding the filter tightly sealed against the support frame.
Claim 11
Dependent Claim
124 words
The invention as described in claim 7 wherein such clamp means comprises: (a) a clip portion having a lip at one end for engaging the edge of said frame flange and a threaded opening at its other end; (b) a bracket member fixedly attached to and extending horizontally inward from said support frame, said bracket having an opening therethrough; (c) a threaded bolt having a head at one end and a shank, the shank passing through said bracket opening threadably engaging said clip portion opening at one end with said bolt head located at the opposite end of said shank and displaced from said bracket member; and (d) spiral compression spring means around said bolt shank between said bracket member and said bolt head.
Claim 12
Dependent Claim
26 words
The invention as in claim 8 wherever said bolt is threadably adjustable in said clip portion opening for varying the compression force on said spring means.
Claim 13
Dependent Claim
25 words
The invention as in claim 8 wherein said bolt is threadably disengageable from said clip portion opening for disconnecting the clamp means from said filter.
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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) | 1989-07-21 | 1990-01-20 | 1990-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-07-21 | 1994-01-20 | 1994-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-07-21 | 1998-01-20 | 1998-07-22 | $7700.00 | Window Closed / Lapsed |