Patent US4549371A successfully refreshed from Google Patents.
US4549371A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dust collecting apparatus for sander
Assignee: Ryobi Ltd
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Filing: 1984-06-08
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Granted: 1985-10-29
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Expires: 2004-06-08
Abstract
Abstract An apparatus for collecting dust for a sander. The sander has a generally planar sanding platen affixed to the main body of the sander by several flexible support columns. The sanding platen is driven by an eccentric mounted on a shaft from the main body of the sander. That same shaft drives a fan in a chamber in the main body that is in flow communication with passages through the main body, through the flexible support columns, through a portion of the sanding platen to holes in the platen that are coincident with holes in the sandpaper. Dust from the workpiece being sanded passes through the holes into the platen, through the support columns to the fan chamber without exposing bearings, supporting the shaft and the eccentric, to the dust.
Inventors
- 👤 Kouzou Hakoda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:50
CPC Classifications
B; B24; B24B; B24B55/00; B24B55/06; B24B55/10; B24B55/105
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
155 words
A dust collecting apparatus for a sanding machine having a rotary driven shaft within a main body, fan blades mounted on said shaft disposed to rotate within a fan chamber, a sanding platen comprised of an upper drive platen and a lower sandpaper engaging layer, said sanding platen being driven by an eccentric portion of said shaft, said sanding platen being affixed to said main body by a plurality of flexible support columns, said apparatus comprising: a plurality of holes in said sandpaper engaging layer; at least one channel in said drive platen in flow communication with said holes; a hollow bore through the length of said columns, said bore being in flow communication with said channel; at least one passage in said main body in flow communication with said bore of said column and said fan chamber; and discharge means in flow communication with said fan chamber and the environment outside said main body.
Claim 2
Dependent Claim
155 words
A dust collecting apparatus for a sanding machine having a rotary driven shaft within a main body, fan blades mounted on said shaft disposed to rotate within a fan chamber, a sanding platen comprised of an upper drive platen and a lower sandpaper engaging layer, said sanding platen being driven by an eccentric portion of said shaft, said sanding platen being affixed to said main body by a plurality of flexible support columns, said apparatus comprising: a plurality of holes in said sandpaper engaging layer; at least one channel in said drive platen in flow communication with said holes; a hollow bore through the length of said columns, said bore being in flow communication with said channel; at least one passage in said main body in flow communication with said bore of said column and said fan chamber; and discharge means in flow communication with said fan chamber and the environment outside said main body.
Claim 3
Dependent Claim
21 words
The apparatus of claim 1 wherein said main body includes nozzle means for engaging one end of said flexible support columns.
Claim 4
Dependent Claim
21 words
The apparatus of claim 1 wherein said sanding platen includes nozzles for engaging the other end of said flexible support columns.
Claim 5
Dependent Claim
13 words
The apparatus of claim 1 wherein said flexible support columns are tubular plastic.
Claim 6
Dependent Claim
35 words
The apparatus of claim 1, wherein said sandpaper engaging layer includes a sandpaper engaging surface, said surface including a plurality of grooves leading from said holes in said layer to the edge of said layer.
Claim 7
Dependent Claim
36 words
The apparatus of claim 5 wherein said sanding platen is rectangular having two short ends and two longer sides, said grooves leading from said holes to the edge of said sandpaper engaging layer along said sides.
Claim 8
Dependent Claim
34 words
The apparatus of claim 6 wherein each of said holes in said layer has two grooves associated therewith, said grooves being disposed in a V-shape with said holes at the apex of said V.
Claim 9
Dependent Claim
45 words
The apparatus of claim 5 wherein said apparatus includes a sheet of perforated sandpaper, said perforations being coincident with said holes in said layer, said sandpaper being disposed to cover said grooves to form passages leading from said holes to the edge of said layer.
Claim 10
Dependent Claim
24 words
The apparatus of claim 1 wherein said apparatus includes a sheet of perforated sandpaper, said perforations being coincident with said holes in said layer.
Claim 11
Dependent Claim
28 words
The apparatus of claim 1, wherein said plurality of holes in said sandpaper engaging layer are formed at positions only adjacent to said hollow holes of said columns.
References Cited (Backward Citations)
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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) | 1988-10-28 | 1989-04-29 | 1989-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-10-28 | 1993-04-29 | 1993-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-10-28 | 1997-04-29 | 1997-10-29 | $7700.00 | Window Closed / Lapsed |