US3848743A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulley for magnetic separation of solid wastes
Assignee: Individual
•
Filing: 1971-12-13
•
Granted: 1974-11-19
•
Expires: 1991-12-13
Abstract
Abstract An improvement on a conventional rotary magnetic pulley operating with a conventional belt for separating household rubbish into one fraction consisting mainly of magnetic and solid materials, and another fraction consisting mainly of useable fibers, by extending the ends of the conventional magnetic pulley with fluted non-magnetic materials, so that any under-the-belt accumulations will be passed out the sides of the pulley.
Inventors
- 👤 V Danberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:40
CPC Classifications
B; B03; B03C; B03C1/00; B03C1/02; B03C1/16
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
121 words
A magnetic separator unit for separating magnetic material from a burden which must be scrambled and regrouped before passing on to the next of a series of magnetic separators, consisting of an endless cOnveyor belt passing over a head magnetic pulley and a tail pulley, said head magnetic pulley rotating about a shaft axially extending through said head magnetic pulley having a magnetic section and at least one end pulley extension, extending longitudinally and composed of nonmagnetic material, said end pulley extension being fluted, having at least one open tapering groove sloping in depth in the longitudinal direction, and said end pulley extension being about one-fourth to about one-half the face length of the magnetic section of the said head pulley.
Claim 2
Dependent Claim
121 words
A magnetic separator unit for separating magnetic material from a burden which must be scrambled and regrouped before passing on to the next of a series of magnetic separators, consisting of an endless cOnveyor belt passing over a head magnetic pulley and a tail pulley, said head magnetic pulley rotating about a shaft axially extending through said head magnetic pulley having a magnetic section and at least one end pulley extension, extending longitudinally and composed of nonmagnetic material, said end pulley extension being fluted, having at least one open tapering groove sloping in depth in the longitudinal direction, and said end pulley extension being about one-fourth to about one-half the face length of the magnetic section of the said head pulley.
Claim 3
Dependent Claim
63 words
A magnetic separator as defined in claim 1, wherein the said head magnetic pulley having a second end pulley extension being straight and flat and said second end pulley extension, extending longitudinally and composed of non-magnetic material and said second end pulley extension being about one-fourth to about one-half the face length of the said magnetic section of the said head magnetic pulley.
Claim 4
Dependent Claim
51 words
A magnetic separator as defined in claim 1 wherein the said scrambled and regrouped burden passing from one of the said series of magnetic separators to a successive magnetic separator in the said series of magnetic separators, said successive magnetic separator rotating a little faster than the preceding said magnetic separator.
Claim 5
Dependent Claim
27 words
A magnetic separator as defined in claim 3 wherein the next of the series of said magnetic separators are positioned about 90* from said preceding magnetic separator.
References Cited (Backward Citations)
US1144383A
Cited
US1576690A
Cited
US2535719A
Cited
US2844251A
Cited
US2939580A
Cited
US2992733A
Cited
US3055229A
Cited
US3038590A
Cited
US3174619A
Cited
US3163596A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-18 | 1978-05-20 | 1978-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-18 | 1982-05-20 | 1982-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-18 | 1986-05-20 | 1986-11-19 | $7700.00 | Window Closed / Lapsed |