Patent US2531079A successfully refreshed from Google Patents.
Patent US3881664A successfully refreshed from Google Patents.
US3881664A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wear plate in an apparatus for conditioning a granular material
Assignee: Pangborn Corp
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Filing: 1973-01-31
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Granted: 1975-05-06
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Expires: 1993-01-31
Abstract
Abstract A centrifugal throwing wheel projects the material radially against an impact surface which completely surrounds and is spaced from the periphery of the wheel. The impact surface comprises a plurality of wear plates or walls spaced from a central axis. Each wall is shaped like a frustrum with one end having a larger opening than the other end. When the wear plates or walls are stacked, the material projected by the throwing wheel is rebounded and deflected by the walls so that the thrown particles are scoured.
Inventors
- 👤 Jr Joseph E Bowling
- 👤 Robert A Speilman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:30
CPC Classifications
B; B24; B24C; B24C9/00; Y; Y10; Y10S; Y10S241/00; Y10S241/10
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
98 words
An impact surface for an apparatus of the type having a centrifugal throwing wheel mounted for projecting a stream of material against the impact surface, said impact surface comprising a first, second and third closed wall, each wall being spaced from a central axis and shaped like a frustrum with one end being larger than the other end, said first, second and third walls being in coaxial loosely stacked relationship, said first wall having its larger end facing upwardly, said second wall having its larger end facing downwardly, and said third wall having its larger end facing upwardly.
Claim 2
Dependent Claim
98 words
An impact surface for an apparatus of the type having a centrifugal throwing wheel mounted for projecting a stream of material against the impact surface, said impact surface comprising a first, second and third closed wall, each wall being spaced from a central axis and shaped like a frustrum with one end being larger than the other end, said first, second and third walls being in coaxial loosely stacked relationship, said first wall having its larger end facing upwardly, said second wall having its larger end facing downwardly, and said third wall having its larger end facing upwardly.
Claim 3
Dependent Claim
41 words
An impact surface according tO claim 1 wherein the larger end of said first wall loosely engages the larger end of said second wall, and the smaller end of said second wall loosely engages the larger end of said third wall.
Claim 4
Dependent Claim
21 words
An impact surface according to claim 2 wherein said first, second and third walls are conically shaped and are substantially coaxial.
Claim 5
Dependent Claim
56 words
An impact surface according to claim 1 wherein said apparatus is of the type having a centrifugal throwing wheel mounted for rotation about a vertical axis for projecting a stream material in a 360* arc, and wherein said first, second and third walls are coaxially aligned with the axis of rotation of said centrifugal throwing wheel.
Claim 6
Dependent Claim
21 words
An impact surface according to claim 1 wherein said first, second and third walls are pyramidally shaped and are substantially coaxial.
Claim 7
Dependent Claim
24 words
An impact surface according to claim 1 wherein each of said walls forms an angle of about 45* with respect to the central axis.
Claim 8
Dependent Claim
30 words
An impact surface according to claim 1 wherein said first wall includes a peripheral flange at the larger end thereof for loosely engaging the larger end of said second wall.
Claim 9
Dependent Claim
29 words
An impact surface according to claim 1 wherein said third wall includes a peripheral flange at the larger end thereof loosely engaging the smaller end of sid second wall.
Claim 10
Dependent Claim
27 words
An impact surface according to claim 1 wherein each of said first, second and third walls comprises a plurality of segments symmetrically arranged about the central axis.
Claim 11
Dependent Claim
90 words
An impact member for use in an apparatus of the type having a centrifugal throwing wheel mounted for rotation and adapted to project granular material against said impact member, said impact member comprising a series of separate plate members loosely stacked in superposed cooperative relationship, said series of separate plate members comprising an impact plate and at least a first ricochet plate, the improvement comprising said ricochet plate being separate from said impact plate for providing ready replacement of one of said separate plate members without necessarily replacing the other.
Claim 12
Dependent Claim
90 words
An impact member for use in an apparatus of the type having a centrifugal throwing wheel mounted for rotation and adapted to project granular material against said impact member, said impact member comprising a series of separate plate members loosely stacked in superposed cooperative relationship, said series of separate plate members comprising an impact plate and at least a first ricochet plate, the improvement comprising said ricochet plate being separate from said impact plate for providing ready replacement of one of said separate plate members without necessarily replacing the other.
Claim 13
Dependent Claim
38 words
An impact member as defined in claim 10 wherein said series of separate plate members are comprised of a plurality of segments disposed for forming an enclosure spaced outwardly from and in surrounding relationship to said throwing wheel.
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) | 1978-05-05 | 1978-11-04 | 1979-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-05 | 1982-11-04 | 1983-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-05 | 1986-11-04 | 1987-05-06 | $7700.00 | Window Closed / Lapsed |