US3788562A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of asbestos fibers from asbestos ore
Assignee: Salzgitter Maschinenbau GmbH
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Filing: 1972-02-16
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Granted: 1974-01-29
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Expires: 1992-02-16
Abstract
Abstract An apparatus and a method are disclosed. Asbestos ore chunks are admitted into a housing in a vertical or near vertical path and into the orbit of striking bars on a rotor which turns about a horizontal axis in the housing. Downstream of the point of contact of each chunk with the striking bars, as seen with reference to the direction of rotation of the rotor, is an impact plate and the arrangement is such that each chunk will be struck only once by the striking bar of the rotor and flung only once against the impact plate, thereby becoming crushed by the impact. A suction conduit communicates with the housing in the region where the crushing takes place so as to immediately withdraw asbestos fibers which are liberated by the crushing.
Inventors
- 👤 C Greenlay
- 👤 E Andreas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:28
CPC Classifications
B; B02; B02C; B02C13/00; B02C13/13; B02C13/26; B02C13/286
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
38 words
An apparatus as defined in claim 1, said orbital path having a given diameter, and said inlet having in direction of rotation of said rotor a width corresponding at most to substantially 15 percent of said given diameter.
Claim 2
Dependent Claim
76 words
An apparatus as defined in claim 1; further comprising a chute having a pair of substantially parallel walls one of which is located upstream and the other of which is located downstream with reference to the direction of rotation of said rotor, and wherein said one wall has a lower end closely proximal to said orbital path and said apex and said other wall has a lower end at a greater distance from said orbital path.
Claim 3
Dependent Claim
47 words
An apparatus as defined in claim 3, further comprising a guide wall extending from the lower end of said upstream wall circumferentially of said rotor in upstream direction and enclosing said orbital path with slight spacing over a portion arc about of the circumference of the rotor.
Claim 4
Dependent Claim
24 words
An apparatus as defined in claim 4, further comprising at least one aperture in said guide wall in the region of said one wall.
Claim 5
Dependent Claim
40 words
An apparatus as defined in claim 1, said impact element including a substantially planar impact surface having an upper and a lower edge which are respectively closer to and farther from a vertical axial plane passing through said horizontal axis.
Claim 6
Dependent Claim
61 words
An apparatus as defined in claim 6, further comprising mounting means mounting said impact element for pivoting movement about an additional horizontal axis, and regulating means for regulating the angular position of said impact element with reference to said additional axis, and for varying the distance of said additional axis relative to said vertical axial plane passing through said horizontal axis.
Claim 7
Dependent Claim
71 words
An apparatus as defined in claim 1, said rotor comprising a shaft extending along and defining said horizontal axis, and at least a pair of axially spaced disk-shaped members mounted on said shaft and each having a periphery provided with a plurality of circumferentially spaced substantially radial slots, said striking elements each extending longitudinally of said shaft and being received and retained in one slot each of the respective disk-shaped members.
Claim 8
Independent Claim
131 words
A method of recovering asbestos fibers from asbestos ore, comprising the steps of feeding chunks of asbestos ore comprising asbestos fibers in matrix material in an at least substantially vertical path; intercepting the respective chunks and subjecting at least most of said chunks to only one accelerating strike at one point and only one decelerating impact at another point which is transversely spaced from said one point, so as to crush the chunks and to liberate asbestos fibers from said matrix material in the zone intermediate said points; and entraining the liberated asbestos fibers by suction in said zone immediately following the respective decelerating impact for conveying them out of said zone and away from said path and matrix material so as to prevent fragmenting of said fibers by further impacting.
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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) | 1977-01-28 | 1977-07-30 | 1978-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-28 | 1981-07-30 | 1982-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-28 | 1985-07-30 | 1986-01-29 | $7700.00 | Window Closed / Lapsed |