Patent US3858359A successfully refreshed from Google Patents.
US3858359A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mobile surface treating apparatus
Assignee: Wheelabrator Corp
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Filing: 1974-01-10
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Granted: 1975-01-07
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Expires: 1994-01-10
Abstract
Abstract A mobile apparatus for the surface treatment with ferromagnetic particulate material thrown onto the surface at high speed, includes a housing which encloses a device for projecting the material onto the surface. Elements are provided for removal of the particulate material from the surface including air jets for slightly lifting the material, a magnetic drum and a conveyor for attracting the ferromagnetic material and conveying it for subsequent reuse.
Inventors
- 👤 Raymond M Leliaert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:06
CPC Classifications
B; B24; B24C; B24C3/00; B24C3/02; B24C3/06; B24C3/065; B24C3/067
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
131 words
In a mobile apparatus for surface treatment with ferromagnetic particulate material, an enclosure having an open bottom side through which the surface to be treated is exposed, means mounting the enclosure for movement over the surface, projecting means within the enclosure for directing particulate material through the open bottom side onto the surface to be treated, means for removal of spent ferromagnetic particulate material from the surface, and means for recovering reusable particulate material; the improvement wherein the means for removal of spent particulate material from the surface comprises: air jets positioned to direct an air stream at the surface to elevate the particulate material slightly above said surface; means for magnetically attracting the elevated particulate material; and belt means for transferring the attracted particulate material to the beams for recovering.
Claim 2
Dependent Claim
131 words
In a mobile apparatus for surface treatment with ferromagnetic particulate material, an enclosure having an open bottom side through which the surface to be treated is exposed, means mounting the enclosure for movement over the surface, projecting means within the enclosure for directing particulate material through the open bottom side onto the surface to be treated, means for removal of spent ferromagnetic particulate material from the surface, and means for recovering reusable particulate material; the improvement wherein the means for removal of spent particulate material from the surface comprises: air jets positioned to direct an air stream at the surface to elevate the particulate material slightly above said surface; means for magnetically attracting the elevated particulate material; and belt means for transferring the attracted particulate material to the beams for recovering.
Claim 3
Dependent Claim
49 words
The apparatus of claim 1 wherein said means for magnetically attracting includes a rotating drum of non-magnetic metal and a plurality of permanent magnets placed at fixed locations along the inner circumference of said drum whereby said magnets attract said particulate matter to the outer circumference of said drum.
Claim 4
Dependent Claim
24 words
The apparatus of claim 2 wherein said magnets are placed at fixed locations along only a portion of the inner circumference of said drum.
Claim 5
Dependent Claim
24 words
The apparatus of claim 2 wherein said belt means is entrained about said drum and the particulate material is attracted onto the belt means.
Claim 6
Dependent Claim
25 words
The apparatus according to claim 1 wherein the belt means is formed of flexible nonmagnetic material having a plurality of ribs on its outer periphery.
Claim 7
Dependent Claim
21 words
The apparatus according to claim 1 wherein the air jets are mounted on a manifold and supplied by an air pump.
Claim 8
Dependent Claim
62 words
The apparatus according to claim 1 wherein the means for recovering includes: a bucket and belt elevator for carrying the particulate material, a rotating screen receiving the particulate material from said elevator for separating coarse waste materials from reusable abrasives; and an air wash separator receiving the particulate material from said screen for separating reusable abrasive from sand, grit and spent abrasive.
Claim 9
Dependent Claim
30 words
A surface treating apparatus as claimed in claim 1 further including a resilient side apron extending from the bottom side edges of the enclosure into resilient engagement with the surface.
Claim 10
Dependent Claim
26 words
The surface treating apparatus of claim 1 in which the particulate material is projected onto the surface within the enclosure in a downwardly and rearwardly direction.
Claim 11
Dependent Claim
31 words
The surface treating apparatus of claim 1 in which the projecting means comprises a bladed wheel mounted for rotational movement at high speed for projecting particulate material centrifugally onto the surface.
Claim 12
Dependent Claim
27 words
The apparatus of claim 1 where said means for magnetically attracting includes a rotating magnetic drum whereby said drum attracts said particulate material to its outer circumference.
Claim 13
Dependent Claim
24 words
The apparatus of claim 11 wherein said belt means is entrained about said drum and the particular material is attracted onto the belt means.
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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) | 1978-01-06 | 1978-07-08 | 1979-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-06 | 1982-07-08 | 1983-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-06 | 1986-07-08 | 1987-01-07 | $7700.00 | Window Closed / Lapsed |