US4381628A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dust control system for surface treating machine
Assignee: SINGER ACQUISITION HOLDINGS COMPANY 8 STAMFORD FORUM STAMFORD CT 06904 A DE CORP
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Filing: 1981-07-20
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Granted: 1983-05-03
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Expires: 2001-07-20
Abstract
Abstract An electrically driven portable surface treating machine such as a sander, polisher, buffer, and the like, having an oscillatable platen driven from a motor shaft and which creates dust during use, is provided with a dust collection fan on the motor shaft in a fan housing portion of the tool housing and an exhaust outlet or port which can selectively be fitted with dust collection means, such as a filter bag. The oscillatable platen is enclosed within a shroud or skirt and the interior of the shroud or skirt is ducted to the inlet of the dust collection fan housing portion. Between the shroud and the fan, there is provided a selective shutter arrangement which may be selectively opened and closed by the machine operator to enable the machine to be operated in either a "dustless" or a "non-dustless" configuration or mode of operation.
Inventors
- 👤 William C. Dicke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:04
CPC Classifications
B; B24; B24B; B24B55/00; B24B55/06; B24B55/10; B24B55/105
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
111 words
In an electrically driven portable surface treating machine such as a sander, polisher, buffer, and the like, having an oscillatable platen driven from a motor shaft and which creates dust during use, a dust collection fan on the motor shaft in a fan housing portion of the tool housing, and an exhaust outlet or port which can selectively be fitted with dust collection means, such as a filter bag the improvement comprising a selective shutter arrangement between said platen and said fan which may be selectively opened and closed by the machine operator to enable the machine to be selectively operated in either a "dustless" or a "non-dustless" mode of operation.
Claim 2
Dependent Claim
111 words
In an electrically driven portable surface treating machine such as a sander, polisher, buffer, and the like, having an oscillatable platen driven from a motor shaft and which creates dust during use, a dust collection fan on the motor shaft in a fan housing portion of the tool housing, and an exhaust outlet or port which can selectively be fitted with dust collection means, such as a filter bag the improvement comprising a selective shutter arrangement between said platen and said fan which may be selectively opened and closed by the machine operator to enable the machine to be selectively operated in either a "dustless" or a "non-dustless" mode of operation.
Claim 3
Dependent Claim
126 words
Surface treating machine defined in claim 1 wherein said shutter arrangement comprises a pair of generally circular superposed plates each of which are provided with a plurality of alternating radial sector openings and ribs, one of said plates being non-rotatable relative to the housing, and the other of said plates being rotatable by the operator to selectively align the sector oepnings thereof selectively with the sector openings of the non-rotatable plate to enable air flow therethrough for dust collection and "dustless" operation or with said ribs of the non-rotatable plate covering the sector openings of said rotatable plate and the ribs of said rotatable plate covering the sector openings of said non-rotatable plate, blocking air flow therethrough and enabling "normal" or "non-dustless" operation of the machine.
Claim 4
Dependent Claim
38 words
Surface treating machine defined in claim 2 wherein the oscillatable platen is enclosed within a shroud or skirt and the interior of the shroud or skirt is ducted to the inlet of the dust collection fan housing portion.
Claim 5
Dependent Claim
26 words
Surface treating machine defined in claim 2 wherein said non-rotatable plate comprises a radial tang which extends into a mating complementary slot in the tool housing.
Claim 6
Dependent Claim
26 words
Surface treating machine defined in claim 4 wherein said rotatable plate comprises a radial tang extending through a slot in the tool housing for operator rotation.
References Cited (Backward Citations)
US3938283A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-05-02 | 1986-11-01 | 1987-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-02 | 1990-11-01 | 1991-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-02 | 1994-11-01 | 1995-05-03 | $7700.00 | Window Closed / Lapsed |