Patent US3924355A successfully refreshed from Google Patents.
US3924355A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal grinder
Assignee: Individual
•
Filing: 1973-01-19
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Granted: 1975-12-09
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Expires: 1993-01-19
Abstract
Abstract A grinding machine having a plurality of relatively movable tables one supporting another which is movable obliquely to the path of travel of the supporting table and mounting a plurality of driven grinders thereon. A second plurality of tables one supporting another and relatively movable. The supported table of the second plurality mounts a work holder for supporting a workpiece. The supporting table of each plurality of tables is movable relative to the base of the machine. Drive apparatus are provided for driving the tables jointly and individually for relatively positioning the workpiece and the individual spindles under control of sensors and detectors that sense and detect positions of the tables to control their positions and relative movements. A dresser for the grinders grinds them accurately under control of a compensating apparatus that controls feed to make certain the dressing takes place only for the proper amount.
Inventors
- 👤 Youji Tatsumi
- 👤 Shohei Ito
- 👤 Katsutoshi Ishii
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:35
CPC Classifications
B; B24; B24B; B24B27/00; B24B27/0076; B23; B23Q; B23Q5/00; B23Q5/22; B23Q5/225; B24B5/00; B24B5/02; B24B5/06; B24B5/10; B24B5/14
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
180 words
A grinding machine comprising, support means, a first grinding wheel head table mounted movably on said support means, a second grinding wheel head table transported on said first grinding wheel table and mounted for oblique movement relative to a direction of travel of the first grinding wheel head table, means mounting a plurality of driven grinding wheel spindles for driving a plurality of grinders for grinding a workpiece, a feedin table mounted movably on said support means for movement relative to said first grinding wheel head table to feed in operation a workpiece to the grinders individually, a shift table mounted on said feed-in table for movement therewith and relative thereto, means mounting a workpiece-holding means for supporting a workpiece thereon, and means for moving said tables individually and including means moving them jointly for relatively positioning a work-piece on said shift table accurately relatively with said grinders individually in registry with said workpiece for grinding thereon and means to relatively feed at a progressively decreasing rate the grinders and workpiece for executing accurate and controlled grinding of the workpiece.
Claim 2
Dependent Claim
180 words
A grinding machine comprising, support means, a first grinding wheel head table mounted movably on said support means, a second grinding wheel head table transported on said first grinding wheel table and mounted for oblique movement relative to a direction of travel of the first grinding wheel head table, means mounting a plurality of driven grinding wheel spindles for driving a plurality of grinders for grinding a workpiece, a feedin table mounted movably on said support means for movement relative to said first grinding wheel head table to feed in operation a workpiece to the grinders individually, a shift table mounted on said feed-in table for movement therewith and relative thereto, means mounting a workpiece-holding means for supporting a workpiece thereon, and means for moving said tables individually and including means moving them jointly for relatively positioning a work-piece on said shift table accurately relatively with said grinders individually in registry with said workpiece for grinding thereon and means to relatively feed at a progressively decreasing rate the grinders and workpiece for executing accurate and controlled grinding of the workpiece.
Claim 3
Dependent Claim
18 words
A grinding machine according to claim 1, including locating means for locating operative positions of said tables individually.
Claim 4
Dependent Claim
16 words
A grinding machine according to claim 1, in which said workpiece-holding means comprises a work-holding spindle.
Claim 5
Dependent Claim
32 words
A guiding machine according to claim 1, in which said means to relatively feed at a progressively decreasing rate the grinders comprises means to automatically move the feed-in table at decreasing rates.
Claim 6
Dependent Claim
54 words
A grinding machine according to claim 4, including means to automatically rapidly return the feed-in table to a position in readiness for dressing of the grinders, and subsequently feed said feed-in table to others of said grinders automatically at a progressively decreasing rate and then automatically rapidly return said feed-in table to said position.
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) | 1978-12-08 | 1979-06-09 | 1979-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-08 | 1983-06-09 | 1983-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-08 | 1987-06-09 | 1987-12-09 | $7700.00 | Window Closed / Lapsed |