US4227315A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Clothes dryer heat economizer
Assignee: Individual
•
Filing: 1978-06-08
•
Granted: 1980-10-14
•
Expires: 1998-06-08
Abstract
Abstract A filter unit for use with a clothes dryer for filtering the exhaust and selectively directing the exhaust to the outside or inside of a building. The filter unit supports a filter element in a slanted position so that when installed between the studdings of a building the filter unit does not extend an appreciable amount beyond the surface of the wall and still provides for large capacity filtering. A removable cover makes for easy access to the filter element. The filter housing is made of sheet material which has reinforced walls. An indicator is used for indicating the condition of the filter element.
Inventors
- 👤 Jesse G. Hight
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 01:19
CPC Classifications
D; D06; D06F; D06F58/00; D06F58/20; D06F58/22
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
130 words
A filter unit for use with a clothes dryer comprising a five sided housing with an open top, a cover having down-turned portions for closing said top, opposite sides of said open top having out-turned portions for receiving said down-turned portions of said cover, flange means on the top of said housing for retaining said cover on said housing, supports located at the far opposite ends of the housing for supporting a filter element in a slanting position, said filter element and housing forming first and second chambers, a second means adapted for connecting the exhaust of a clothes dryer to said first chamber, third and fourth means connected to said second chamber for conducting air from said second chamber, fifth means for alternatively closing said third or fourth means.
Claim 2
Dependent Claim
130 words
A filter unit for use with a clothes dryer comprising a five sided housing with an open top, a cover having down-turned portions for closing said top, opposite sides of said open top having out-turned portions for receiving said down-turned portions of said cover, flange means on the top of said housing for retaining said cover on said housing, supports located at the far opposite ends of the housing for supporting a filter element in a slanting position, said filter element and housing forming first and second chambers, a second means adapted for connecting the exhaust of a clothes dryer to said first chamber, third and fourth means connected to said second chamber for conducting air from said second chamber, fifth means for alternatively closing said third or fourth means.
Claim 3
Dependent Claim
42 words
A filter unit according to claim 1 wherein said unit is adapted to be inserted between the framework of a building and said slanted filter element forms a large filter surface with a minimum depth which approximates the depth of said framework.
References Cited (Backward Citations)
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US3999304A
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US4137647A
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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) | 1983-10-14 | 1984-04-14 | 1984-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-10-14 | 1988-04-14 | 1988-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-10-14 | 1992-04-14 | 1992-10-14 | $7700.00 | Window Closed / Lapsed |