Patent US4172338A successfully refreshed from Google Patents.
US4172338A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for grinding or polishing article having cylindrical or curved surface
Assignee: AGC Inc
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Filing: 1978-01-18
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Granted: 1979-10-30
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Expires: 1998-01-18
Abstract
Abstract An apparatus for grinding or polishing an article having a cylindrical curved surface comprises a turn table attached at an end of a rotary shaft by a pin joint and turned to a predetermined direction by the rotary shaft; a grinding means for grinding or polishing the article set on the turn table; a cam provided around the rotary shaft of the turn table; a cam roller contacting the cam; whereby the turn table is rocked around the pin joint by the cam and the cam roller; and the curved surface of the article is uniformly ground or polished by setting the article on the turn table so as to substantially arrange the cylindrical axis direction Y--Y of the article in the pin joint direction.
Inventors
- 👤 Ichiro Kojo
- 👤 Kiyomi Yamaguchi
- 👤 Tiuzi Fumikura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:36
CPC Classifications
B; B24; B24B; B24B19/00; B24B19/26
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
106 words
An apparatus for grinding or polishing an article having a cylindrical curved surface, said apparatus comprising: a turntable for supporting said article; a rotary shaft; a pin joint connecting said turntable with said rotary shaft and permitting rocking of said turntable about the axis of said pin joint, and pin joint being located adjacent to the side of said turntable opposite the side supporting said article; an annular cam, having a cam surface that causes said turntable to rock about said joint axis, provided about said rotary shaft, and a cam roller contacting said cam surface; and a grinding means for grinding and polishing said article.
Claim 2
Independent Claim
106 words
An apparatus for grinding or polishing an article having a cylindrical curved surface, said apparatus comprising: a turntable for supporting said article; a rotary shaft; a pin joint connecting said turntable with said rotary shaft and permitting rocking of said turntable about the axis of said pin joint, and pin joint being located adjacent to the side of said turntable opposite the side supporting said article; an annular cam, having a cam surface that causes said turntable to rock about said joint axis, provided about said rotary shaft, and a cam roller contacting said cam surface; and a grinding means for grinding and polishing said article.
Claim 3
Dependent Claim
25 words
An apparatus according to claim 1 wherein the cam rollers are connected to the turn table in the direction perpendicular to the pin joint direction.
Claim 4
Dependent Claim
21 words
An apparatus according to claim 1 wherein the article is a panel of a cathode ray tube of a television receiver.
Claim 5
Dependent Claim
21 words
An apparatus according to claim 1 wherein the grinding means is eccentrically disposed to the rotary shaft of the turn table.
Claim 6
Dependent Claim
18 words
The apparatus of claim 1 wherein said cam surface defines a plane which passes through said pin joint.
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) | 1982-10-29 | 1983-04-30 | 1983-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-29 | 1987-04-30 | 1987-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-29 | 1991-04-30 | 1991-10-30 | $7700.00 | Window Closed / Lapsed |