Patent US3691689A successfully refreshed from Google Patents.
US3691689A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Abrasive surface cleaning apparatus
Assignee: Individual
•
Filing: 1971-02-04
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Granted: 1972-09-19
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Expires: 1991-02-04
Abstract
Abstract A novel, mobile, continuously operable abrasive surface cleaning apparatus utilizing a rotating brush for abrasive recovery is disclosed. Also, a novel continuous belt elevator or conveyor for recirculating the recovered abrasive is disclosed.
Inventors
- 👤 James R Goff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:02
CPC Classifications
B; B24; B24C; B24C9/00; B24C3/00; B24C3/02; B24C3/06; B24C3/065; B24C3/067
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
116 words
A mobile, continuously operable surface treating apparatus comprising in combination: an enclosure with an open side adapted to contact the surface to be treated, projecting means within the enclosure for directing a stream of abrasive particles through the open side of the enclosure onto the surface to be treated, resilient sealing means around the boundary of the open side of the enclosuRe to restrain spent abrasive, rotating brush means located behind the enclosure with open side to recover the spent abrasive collected within the enclosure and passing under the resilient sealing means upon movement of the apparatus across the surface being treated, and recirculation means to return the spent, recovered abrasive material to the projecting means.
Claim 2
Dependent Claim
116 words
A mobile, continuously operable surface treating apparatus comprising in combination: an enclosure with an open side adapted to contact the surface to be treated, projecting means within the enclosure for directing a stream of abrasive particles through the open side of the enclosure onto the surface to be treated, resilient sealing means around the boundary of the open side of the enclosuRe to restrain spent abrasive, rotating brush means located behind the enclosure with open side to recover the spent abrasive collected within the enclosure and passing under the resilient sealing means upon movement of the apparatus across the surface being treated, and recirculation means to return the spent, recovered abrasive material to the projecting means.
Claim 3
Dependent Claim
13 words
The apparatus of claim 1 wherein the projecting means is a centrifugal wheel.
Claim 4
Dependent Claim
25 words
The apparatus of claim 2 wherein the recirculation means comprises continuous belt elevator means in conjunction with a storage hopper for the spent, recovered abrasive.
Claim 5
Dependent Claim
150 words
The apparatus of claim 3 wherein the continuous belt elevator means comprises a combination an outer housing surrounding the continuous belt, a continuous flexible belt having attached thereto a plurality of bucket means, said bucket means not being in contact with the housing during operation and being adapted to recover and transport particulate matter from the bottom of the housing to the top of the housing for dumping into a storage hopper, drive means to drive the belt and maintain the belt in a four-sided shape providing a lower horizontal pick-up flight in which the bucket means are below the belt, an elevator flight, an upper horizontal delivery flight in which the bucket means are above the belt, and a descending return flight, and a storage hopper beneath the delivery flight at the top of the housing to collect particulate matter dumped from the plurality of bucket means during operation.
Claim 6
Dependent Claim
15 words
The apparatus of claim 1 further containing a drive means to provide a self-propelled apparatus.
Claim 7
Dependent Claim
21 words
The apparatus of claim 1 further containing a dust collection means to remove powdered grit and dust from the spent abrasive.
References Cited (Backward Citations)
US2424955A
Cited
US2483176A
Cited
US2628456A
Cited
US2684558A
Cited
US3034262A
Cited
US3380196A
Cited
US3448544A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-19 | 1976-03-20 | 1976-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-19 | 1980-03-20 | 1980-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-19 | 1984-03-20 | 1984-09-19 | $7700.00 | Window Closed / Lapsed |