US4422239A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Powered handtool
Assignee: Individual
•
Filing: 1981-10-01
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Granted: 1983-12-27
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Expires: 2001-10-01
Abstract
Abstract A powered hand tool, as for example an angle grinder or a milling tool for use with a routing cutter for working on wood or synthetic resin, has a housing, a motor, and a cover for the tool bit. In the housing an airway is placed for aspiration of air from the space within the cover, the airway coming to an end at an opposite end of the housing.
Inventors
- 👤 Peter Maier
- 👤 Hans-Dieter Tschacher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:44
CPC Classifications
B; B08; B08B; B08B15/00; B08B15/04; B23; B23Q; B23Q1/00; B23Q1/0009; B23Q11/00; B23Q11/0042; B23Q11/0046; B24; B24B; B24B23/00; B24B23/02; B24B23/028
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
173 words
In a hand tool which includes a housing having a handle part which can be manually gripped, a tool rotatably supported on said housing, a motor provided in said housing, means for releasably drivingly connecting said motor to said tool, a protective hood which is supported on said housing and partially surrounds said tool, means defining a suction channel which communicates with said protective hood and with a connecting piece which is provided on said housing at a location remote from said tool, and a suction device having a hose which leads to and is releasably secured to said connecting piece and communicates with said suction channel, said handle part being elongate and said suction channel extending appropriately parallel to said handle part, the improvement comprising wherein said motor is provided in said handle part of said housing and, viewing said handle part in cross section, is arranged eccentrically in said handle part, and wherein said suction channel is provided within said handle part and extends past said motor on one side thereof.
Claim 2
Dependent Claim
173 words
In a hand tool which includes a housing having a handle part which can be manually gripped, a tool rotatably supported on said housing, a motor provided in said housing, means for releasably drivingly connecting said motor to said tool, a protective hood which is supported on said housing and partially surrounds said tool, means defining a suction channel which communicates with said protective hood and with a connecting piece which is provided on said housing at a location remote from said tool, and a suction device having a hose which leads to and is releasably secured to said connecting piece and communicates with said suction channel, said handle part being elongate and said suction channel extending appropriately parallel to said handle part, the improvement comprising wherein said motor is provided in said handle part of said housing and, viewing said handle part in cross section, is arranged eccentrically in said handle part, and wherein said suction channel is provided within said handle part and extends past said motor on one side thereof.
Claim 3
Dependent Claim
67 words
The hand tool according to claim 1, wherein said suction channel is integrated into said handle part, said suction channel being provided in a portion of said handle part which has a generally semicircular cross-sectional shape and an outer surface which merges smoothly into the outer surface of the remaining portion of said handle part, said remaining portion having a substantially rectangular cross-sectional shape with rounded corners.
Claim 4
Dependent Claim
24 words
The hand tool according to claim 1, wherein said handle part which contains said suction channel is releasably sealingly connected to said protective hood.
Claim 5
Dependent Claim
59 words
The hand tool according to claim 1, wherein said handle part of said housing extends at substantially a right angle with respect to the axis of rotation of said tool, and wherein said suction channel has at its end which communicates with said protective hood a section which is inclined with respect to the remainder of said suction channel.
Claim 6
Dependent Claim
93 words
The hand tool according to claim 1, wherein said motor is a pneumatic motor, including means defining a pressure source, and including means defining a supply conduit for carrying pressurized air from said pressure source to said motor and an outlet conduit for carrying waste air away from said motor, said outlet conduit including a first portion extending from said motor to said connecting piece through said suction channel and a second portion extending away from said connecting piece within said hose, and wherein said supply conduit is disposed within said outlet conduit.
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) | 1986-12-26 | 1987-06-27 | 1987-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-26 | 1991-06-27 | 1991-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-26 | 1995-06-27 | 1995-12-27 | $7700.00 | Window Closed / Lapsed |