US3906673A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Abrasive cleaning machine
Assignee: Kanadevia Corp
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Filing: 1974-03-18
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Granted: 1975-09-23
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Expires: 1994-03-18
Abstract
Abstract A portable abrasive cleaning machine has a hood covering a surface area to be cleaned, means such as motor driven impeller for discharging an abrasive agent against the surface, the abrasive agent being fed to the impeller from a container on the machine and being returned to the container together with any foreign particles cleaned from the surface through a tube communicating with the hood. Air currents obtained from a pressurized air source to which the machine is connected are employed to power the motor, to feed abrasive agent to the impeller, to convey the abrasive agent and particles back to the container and to separate the abrasive agent from the particles which are discharged into a bag filter. An embodiment of the machine for cleaning an area at the intersection of perpendicular surfaces is provided with wheels engageable with both surfaces and adjustable to obtain proper contact between the surfaces and the hood of the machine.
Inventors
- 👤 Toshiho Goto
- 👤 Dan Yoshida
- 👤 Akira Yamamoto
- 👤 Tatsumi Onaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:08
CPC Classifications
B; B24; B24C; B24C3/00; B24C3/02; B24C3/06; B24C3/065
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
167 words
An abrasive cleaning machine comprising: abrasive discharging means including a hood adapted to cover a given area of a surface to be cleaned; an enclosed container for an abrasive agent, and a feed path for said agent extending from said container to said abrasive discharging means; a return tube establishing communication between the interior of the upper portion of said container and the interior of said hood, and a bleed channel which opens to the interior of said container at the upper end thereof; and, means for producing air currents which flow from the interior of said hood to said container via said return tube and from the interior of the container to said bleed channel whereby abrasive agent particles which are discharged against the surface to be cleaned are recirculated to said container by said air currents for re-use, said means comprising a constructed passage provided in said bleed channel, and an air nozzle for discharging pressurized air toward the downstream side of said constructed passage.
Claim 2
Dependent Claim
167 words
An abrasive cleaning machine comprising: abrasive discharging means including a hood adapted to cover a given area of a surface to be cleaned; an enclosed container for an abrasive agent, and a feed path for said agent extending from said container to said abrasive discharging means; a return tube establishing communication between the interior of the upper portion of said container and the interior of said hood, and a bleed channel which opens to the interior of said container at the upper end thereof; and, means for producing air currents which flow from the interior of said hood to said container via said return tube and from the interior of the container to said bleed channel whereby abrasive agent particles which are discharged against the surface to be cleaned are recirculated to said container by said air currents for re-use, said means comprising a constructed passage provided in said bleed channel, and an air nozzle for discharging pressurized air toward the downstream side of said constructed passage.
Claim 3
Dependent Claim
23 words
An abrasive cleaning machine as set forth in claim 1, including a bag filter connected to the terminal end of said bleed channel.
Claim 4
Dependent Claim
58 words
An abrasive cleaning Machine as set forth in claim 1, wherein an opening in said container for said return tube is directed tangentially to the peripheral wall of the container, and an opening in said container for said bleed channel is sufficiently smaller than the cross sectional area of the container and is located centrally of the container.
Claim 5
Dependent Claim
196 words
An abrasive cleaning machine connectable to a source of working air comprising: abrasive discharging means including a hood adapted to cover a given area of a surface to be cleaned, an air driven drive motor and an abrasive slinging impeller driven thereby, and means for feeding working air to said air motor; an enclosed container for an abrasive agent, a feed path for said agent extending from said container to said abrasive discharging means, and nozzle means supplied by working air for producing air currents to forcibly feed the abrasive agent to said impeller from said feed path; a return tube establishing communication between the interior of the upper portion of said container and the interior of said hood, and a bleed channel which opens to the interior of said container at the upper end thereof; and, means supplied by working air for producing air currents which flow from the interior of said hood to said container via said return tube and from the interior of said container to said bleed channel whereby abrasive agent particles which are discharged against the surface to be cleaned are recirculated to said container by said air currents for re-use.
Claim 6
Dependent Claim
196 words
An abrasive cleaning machine connectable to a source of working air comprising: abrasive discharging means including a hood adapted to cover a given area of a surface to be cleaned, an air driven drive motor and an abrasive slinging impeller driven thereby, and means for feeding working air to said air motor; an enclosed container for an abrasive agent, a feed path for said agent extending from said container to said abrasive discharging means, and nozzle means supplied by working air for producing air currents to forcibly feed the abrasive agent to said impeller from said feed path; a return tube establishing communication between the interior of the upper portion of said container and the interior of said hood, and a bleed channel which opens to the interior of said container at the upper end thereof; and, means supplied by working air for producing air currents which flow from the interior of said hood to said container via said return tube and from the interior of said container to said bleed channel whereby abrasive agent particles which are discharged against the surface to be cleaned are recirculated to said container by said air currents for re-use.
Claim 7
Dependent Claim
42 words
An abrasive cleaning machine as set forth in claim 4, wherein the means for producing air currents comprises a constricted passage provided in said bleed channel, and an air nozzle for discharging pressurized air toward the downstream side of said constricted passage.
Claim 8
Dependent Claim
79 words
An abrasive cleaning machine as set forth in claim 4 wherein said abrasive agent feed path is provided at the terminal end thereof with an oulet port opening radially to said impeller, and said air nozzle means comprises a first air nozzle and a second air nozzle, said first air nozzle being located between the ends of said feed path and being directed toward said terminal end thereof, and said second air nozzle being directed toward said outlet port.
Claim 9
Dependent Claim
75 words
An abrasive cleaning machine as set forth in claim 4, wherein said hood is shaped to cover a corner portion of a surface to be cleaned from the horizontal region to the vertical region thereof and said machine is provided with horizontal plane engaging wheel units adapted to roll on the horizontal region of said surface and vertical plane engaging wheel units adapted to abut against and roll on the vertical region of said surface.
Claim 10
Dependent Claim
54 words
An abrasive cleaning machine as set forth in claim 7 wherein said horizontal plane and vertical plane engaging wheel units are spaced longitudinally in the direction of travel of the machine, and the horizontal plane engaging wheel units include a pair of such units disposed transversely of the direction of travel of the machine.
Claim 11
Dependent Claim
27 words
An abrasive cleaning machine as set forth in claim 7 wherein each of said wheel units is arranged so that the level of its wheel is adjustable.
Claim 12
Dependent Claim
38 words
An abrasive cleaning machine as set forth in claim 7 wherein one of the horizontal plane engaging wheel units is disposed so that its rolling direction is inclined toward the vertical region of the surface to be cleaned.
Claim 13
Dependent Claim
59 words
An abrasive cleaning machine as set forth in claim 4 wherein said machine further includes a manual push handle having a grip bar, a connection on said grip bar for working air, a working air passage extending through at least a portion of said handle, and an on-off valve which also serves as a portion of said grip bar.
Claim 14
Dependent Claim
73 words
An abrasive cleaning machine as set forth in claim 4, wherein working air is supplied to said air motor and to said nozzle means through separate feed paths, an on-off valve communicating with each of said feed paths and with the working air connection, said valve including cLosure means capable of cutting off the supply of working air to each of said feed paths and simultaneously isolating said feed paths from each other.
Claim 15
Dependent Claim
23 words
An abrasive cleaning machine as set forth in claim 4, including a bag filter connected to the terminal end of said bleed channel.
Claim 16
Dependent Claim
42 words
An abrasive cleaning machine as set forth in claim 4, wherein the means for producing air currents comprises a constricted passage provided in said bleed channel, and an air nozzle for discharging pressurized air toward the downstream side of said constructed passage.
Claim 17
Dependent Claim
58 words
An abrasive cleaning machine as set forth in claim 4, wherein an opening in said container for said return tube is directed tangentially to the peripheral wall of the container, and an opening in said container for said bleed channel is sufficiently smaller than the cross sectional area of the container and is located centrally of the container.
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) | 1978-09-22 | 1979-03-24 | 1979-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-22 | 1983-03-24 | 1983-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-22 | 1987-03-24 | 1987-09-23 | $7700.00 | Window Closed / Lapsed |