Patent US5302174A successfully refreshed from Google Patents.
US5302174A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-unit grease filter
Assignee: Research Products Corp
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Filing: 1993-07-07
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Granted: 1994-04-12
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Expires: 2013-07-07
Abstract
Abstract A multi-unit grease filter includes a first filter unit and a second filter unit, each having an upstream series of spaced apart elongated baffles and a downstream series of spaced apart elongated baffles offset from the upstream series of baffles so that the baffles overlap and expose the air to multiple surfaces as it travels through the filter. The baffles have their ends connected to a pair of end frame members, each of which has at least one spacer in the form of a side edge having a first portion co-extensive with the upstream series of baffles and a second portion co-extensive with the downstream series of baffles so as to provide an off-set in each of the end frame members so that when the first and second filter units are disposed in abutment side by side, the off-sets align and overlap so that a bifurcated seam line is formed at the abutment and a downstream baffle overlaps with an upstream baffle at the seam line.
Inventors
- 👤 Timothy L. Guetersloh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:12
CPC Classifications
F; F24; F24C; F24C15/00; F24C15/20; F24C15/2035; B; B01; B01D; B01D45/00; B01D45/04; B01D45/08; Y; Y10; Y10S; Y10S55/00; Y10S55/36
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
171 words
A multi-unit grease filter of the type in which a plurality of substantially rectangular filter frames are disposed side by side with each of the frames containing a plurality of elongated overlapping baffles so that air passing through the filter encounters a plurality of surfaces causing the air to change directions, said filter comprising: a first filter unit and a second filter unit, each having an upstream series of spaced apart elongated baffles and a downstream series of spaced apart elongated baffles offset from said upstream series of baffles so that the baffles overlap and expose the air flow to multiple surfaces, said elongated baffles in said first and second filter units being disposed between and connected to two end frame members, said end frame members having spacing means whereby said first and second filter units may be disposed side by side with said end frame members in abutment and with a downstream baffle of one of said filter units overlapping an upstream baffle of the other of said filter units.
Claim 2
Dependent Claim
171 words
A multi-unit grease filter of the type in which a plurality of substantially rectangular filter frames are disposed side by side with each of the frames containing a plurality of elongated overlapping baffles so that air passing through the filter encounters a plurality of surfaces causing the air to change directions, said filter comprising: a first filter unit and a second filter unit, each having an upstream series of spaced apart elongated baffles and a downstream series of spaced apart elongated baffles offset from said upstream series of baffles so that the baffles overlap and expose the air flow to multiple surfaces, said elongated baffles in said first and second filter units being disposed between and connected to two end frame members, said end frame members having spacing means whereby said first and second filter units may be disposed side by side with said end frame members in abutment and with a downstream baffle of one of said filter units overlapping an upstream baffle of the other of said filter units.
Claim 3
Dependent Claim
97 words
The grease filter defined in claim 1 wherein said spacing means comprises: a first edge portion on each of said end frame members co-extensive with said upstream series of baffles and a second edge portion on each of said end frame members co-extensive with said downstream series of baffles so as to provide an off-set in each of said end frame members so that when said first and second filter units are disposed side by side, said off-sets align and overlap so that a bifurcated seam line is formed at the abutment of said end frame members.
Claim 4
Dependent Claim
27 words
The grease filter defined in claim I wherein said baffles are arcuate in shape whereby the air flowing through the filter is exposed to multiple curved surfaces.
Claim 5
Dependent Claim
56 words
The grease filter defined in claim I wherein each side edge of said first and second filter units has a first portion co-extensive with said upstream series of baffles and a second portion co-extensive with said downstream series of baffles so as to provide an off-set at both sides of each of said end frame members.
Claim 6
Dependent Claim
36 words
The grease filter defined in claim 2 further comprising additional filter units configured substantially identical to said first and second filter units and disposed in abutment side by side with said first and second filter units.
Claim 7
Dependent Claim
221 words
A multi-unit grease filter of the type in which a plurality of substantially rectangular filter frames are disposed side by side with each of the frames containing a plurality of elongated overlapping baffles so that air passing through the filter encounters a plurality of surfaces causing the air to change directions, said filter comprising: a first filter unit and a second filter unit, each having an upstream series of spaced apart elongated arcuate baffles and a downstream series of spaced apart elongated arcuate baffles offset from said upstream series of baffles so that the baffles overlap and expose the air flow to multiple curved surfaces, said elongated baffles in said first and second filter units being disposed between and connected to two end frame members, each of said end frame members having at least one side edge having a first portion co-extensive with said upstream series of baffles and a second portion co-extensive with said downstream series of baffles so as to provide an off-set in each of said end frame members, said first and second filter units disposed in abutment side by side with said end frame member notches aligning and overlapping so that a bifurcated seam line is formed at the abutment of said end frame members and a downstream baffle overlaps an upstream baffle at the seam line.
Claim 8
Dependent Claim
221 words
A multi-unit grease filter of the type in which a plurality of substantially rectangular filter frames are disposed side by side with each of the frames containing a plurality of elongated overlapping baffles so that air passing through the filter encounters a plurality of surfaces causing the air to change directions, said filter comprising: a first filter unit and a second filter unit, each having an upstream series of spaced apart elongated arcuate baffles and a downstream series of spaced apart elongated arcuate baffles offset from said upstream series of baffles so that the baffles overlap and expose the air flow to multiple curved surfaces, said elongated baffles in said first and second filter units being disposed between and connected to two end frame members, each of said end frame members having at least one side edge having a first portion co-extensive with said upstream series of baffles and a second portion co-extensive with said downstream series of baffles so as to provide an off-set in each of said end frame members, said first and second filter units disposed in abutment side by side with said end frame member notches aligning and overlapping so that a bifurcated seam line is formed at the abutment of said end frame members and a downstream baffle overlaps an upstream baffle at the seam line.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-04-11 | 1997-10-11 | 1998-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-04-11 | 2001-10-11 | 2002-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-04-11 | 2005-10-11 | 2006-04-12 | $7700.00 | Window Closed / Lapsed |