Patent US5100335A successfully refreshed from Google Patents.
Patent US4219974A successfully refreshed from Google Patents.
US4219974A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copy-grinding apparatus
Assignee: Maschinenfabrik Zuckermann KG
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Filing: 1978-05-11
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Granted: 1980-09-02
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Expires: 1998-05-11
Abstract
Abstract This invention relates to apparatus for copy-grinding workpieces consisting particularly of wood or a similarly grindable material, e.g. aluminum, and having an uneven surface, such apparatus comprising a rotatable clamping device for receiving a workpiece therein and at least one driven grinding tool positively controlled by a scanning roller scanning a master model and adapted to be advanced along the workpiece in the direction of the axis of rotation by an advancing mechanism.
Inventors
- 👤 Erich Schmidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:09
CPC Classifications
B; B24; B24B; B24B17/00; B24B17/02; B24B17/025
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
173 words
An improvement in apparatus for copy-grinding workpieces consisting particularly of wood or a similarly grindable material, e.g., aluminum, and having uneven surfaces, said apparatus comprising a rotatable clamping device for receiving a workpiece therein, at least one driven grinding tool positively controlled by a scanning roller scanning a master model and advanceable along the workpiece in the direction of the axis of rotation of the clamping device by an advance mechanism, and means for rotating the master model about an axis of rotation, wherein the workpiece has wave-shaped, concave surface areas extending generally transversely to the axis of rotation of said clamping device, the improvement comprising means for mounting the grinding tool for pivotal movement about an axis generally normal to the axis of rotation of the clamping device, means for mounting said scanning roller for pivotal movement about an axis generally normal to the axis of rotation of the master model and means coupling said grinding tool to said scanning roller for transmitting a selected angle of attack of said grinding tool.
Claim 2
Dependent Claim
173 words
An improvement in apparatus for copy-grinding workpieces consisting particularly of wood or a similarly grindable material, e.g., aluminum, and having uneven surfaces, said apparatus comprising a rotatable clamping device for receiving a workpiece therein, at least one driven grinding tool positively controlled by a scanning roller scanning a master model and advanceable along the workpiece in the direction of the axis of rotation of the clamping device by an advance mechanism, and means for rotating the master model about an axis of rotation, wherein the workpiece has wave-shaped, concave surface areas extending generally transversely to the axis of rotation of said clamping device, the improvement comprising means for mounting the grinding tool for pivotal movement about an axis generally normal to the axis of rotation of the clamping device, means for mounting said scanning roller for pivotal movement about an axis generally normal to the axis of rotation of the master model and means coupling said grinding tool to said scanning roller for transmitting a selected angle of attack of said grinding tool.
Claim 3
Dependent Claim
17 words
Apparatus according to claim 1, characterized in that said grinding tool is mounted on pivotable parallel arms.
Claim 4
Dependent Claim
23 words
Apparatus according to claim 2, characterized in that said grinding tool is rotatably mounted in a guide bushing at each of said arms.
Claim 5
Dependent Claim
16 words
Apparatus according to claim 1, characterized in that said grinding tool has a crowned working surface.
Claim 6
Dependent Claim
39 words
Apparatus according to claim 4 comprising a belt grinding unit as the grinding tool, wherein the belt grinding unit includes a grinding belt and a pressure roller, characterized in that at least the pressure roller is of toroidal shape.
Claim 7
Dependent Claim
53 words
Apparatus according to claim 5, characterized in that the grinding belt is composed of a plurality of woven belt sections having warp threads and weft threads, said sections being interconnected at their longitudinal ends, with their warp threads extending at a slightly inclined angle with respect to the longitudinal axis of the belt.
Claim 8
Dependent Claim
34 words
Apparatus according to claim 6 characterized that each belt section comprises at least one warp thread continuously extending from one point of connection of said belt sections to the next adjoining points of connection.
Claim 9
Dependent Claim
30 words
Apparatus according to either claim 6 or 7, characterized in that the grinding belt has segment-shaped cutouts on both sides of each point of connection of said woven belt sections.
Claim 10
Dependent Claim
28 words
Apparatus according to either of claim 6 and 7, characterized in that the longitudinal ends of the belt sections extend parallel to the direction of the weft threads.
Claim 11
Dependent Claim
41 words
Apparatus according to any of claims 5, 6 or 7 characterized in that the pressure roller has associated therewith a rearwardly offset belt guide at each side thereof for guiding the grinding belt in a roof-shaped configuration over the pressure roller.
Claim 12
Dependent Claim
24 words
Apparatus according to claim 9, characterized in that the longitudinal ends of the belt sections extend parallel to the direction of the weft threads.
References Cited (Backward Citations)
US1179999A
Cited
US2115908A
Cited
DE940817C
Cited
DE879374C
Cited
US2641089A
Cited
US2724934A
Cited
CH338738A
Cited
US2754637A
Cited
US2896378A
Cited
US3053020A
Cited
US3164144A
Cited
US3925937A
Cited
US4031669A
Cited
US4051636A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-09-02 | 1984-03-03 | 1984-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-02 | 1988-03-03 | 1988-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-02 | 1992-03-03 | 1992-09-02 | $7700.00 | Window Closed / Lapsed |