US4261718A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter bed of compressed coils
Assignee: Vortox Manufacturing Co
•
Filing: 1979-12-06
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Granted: 1981-04-14
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Expires: 1999-12-06
Abstract
Abstract A filter bed for an air cleaner, or the like, comprising a compressed mass of coils each having axially spaced portions of different diameters. With this construction, the tendency of the coils to nest together over their entire lengths is reduced, and the filtering ability of the bed is increased.
Inventors
- 👤 Herman H. Garner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:06
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/10; B01D39/00; B01D39/02; B01D39/06; B01D39/14; B01D39/20; B01D39/2027; B01D39/2041; Y; Y10; Y10S; Y10S261/00; Y10S261/72
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
75 words
A filter bed for an oil bath type air cleaner having only an air inlet and an air outlet, and comprising a compressed mass of coils, with at least some of said coils consisting of a single coil having axially spaced portions of different diameters and having adjacent turns spaced from each other, with said coils packed together in a compressed mass such that longitudinally overlapping coils do not nest together over their entire lengths.
Claim 2
Dependent Claim
75 words
A filter bed for an oil bath type air cleaner having only an air inlet and an air outlet, and comprising a compressed mass of coils, with at least some of said coils consisting of a single coil having axially spaced portions of different diameters and having adjacent turns spaced from each other, with said coils packed together in a compressed mass such that longitudinally overlapping coils do not nest together over their entire lengths.
Claim 3
Dependent Claim
18 words
A filter bed according to claim 1 wherein each coil has an axially central portion of larger diameter.
Claim 4
Dependent Claim
19 words
A filter bed as set forth in claim 1 wherein each coil has an end portion of larger diameter.
Claim 5
Dependent Claim
15 words
A filter bed according to claim 1 wherein the convolations of each coil are corrugated.
Claim 6
Dependent Claim
16 words
A filter bed as defined in claim 1 wherein each coil is formed of metal wire.
References Cited (Backward Citations)
SU319333A1
Cited
US1639132A
Cited
US1748830A
Cited
US2322513A
Cited
US2874800A
Cited
US2973833A
Cited
US3494366A
Cited
SU567479A1
Cited
US4116647A
Cited
US4110418A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-04-13 | 1984-10-13 | 1985-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-04-13 | 1988-10-13 | 1989-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-04-13 | 1992-10-13 | 1993-04-14 | $7700.00 | Window Closed / Lapsed |