US3665648A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grinding apparatus
Assignee: YAMANAKA SEISAKUSHO YK
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Filing: 1970-09-28
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Granted: 1972-05-30
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Expires: 1990-09-28
Abstract
Abstract A grinding apparatus which is so constructed that three workholders are rotatably mounted on a turn table in equally spaced relation peripherally of said turn table to be intermittently shifted from one to another of three positions consisting of an inoperative position and a first and second working positions. Two grinding mechanisms are arranged exterior of said turn table adjacent said first and second working positions respectively. The table is operative in such a manner that a workpiece mounted on one of said workholders in said inoperative position is carried thereon to said first working position where it is roughly ground and then to said second working position where it is subjected to a finishing grinding and then back to said inoperative position to be removed from the apparatus, the intermittent rotation of said turn table being controlled by a detecting device which detects the amount of the workpiece ground by way of a master which is ground concurrently with said workpiece.
Inventors
- 👤 Sadajiro Yamanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:21
CPC Classifications
B; B24; B24B; B24B7/00; B24B7/06
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
191 words
A grinding apparatus comprising a frame, a turn table rotatably mounted on said frame, three disc-shaped workholders rotatably mounted on said turn table in equally spaced peripheral relation on said turn table, two grinding mechanisms arranged exterior of said turn table in spaced relation from said turn table, means for rotating said turn table intermittently in such a manner that one of said workholders may be held stationary in position corresponding to one of said grinding mechanisms and another one in a position corresponding to the other grinding mechanism, means for rotating each one of said workholders in a path of movement from the position corresponding to one of said grinding mechanisms to the position corresponding to the other grinding mechanism and holding it stationary in the other position, a master provided adjacent each of said workholders and operatively connected to said workholder to be rotated thereby, each of said grinding mechanisms including a grinding wheel arranged to grind a workpiece on the workholder and said master concurrently, and means for detecting the amount of said master ground by said grinding wheel and emitting a signal to stop the grinding operation.
Claim 2
Dependent Claim
191 words
A grinding apparatus comprising a frame, a turn table rotatably mounted on said frame, three disc-shaped workholders rotatably mounted on said turn table in equally spaced peripheral relation on said turn table, two grinding mechanisms arranged exterior of said turn table in spaced relation from said turn table, means for rotating said turn table intermittently in such a manner that one of said workholders may be held stationary in position corresponding to one of said grinding mechanisms and another one in a position corresponding to the other grinding mechanism, means for rotating each one of said workholders in a path of movement from the position corresponding to one of said grinding mechanisms to the position corresponding to the other grinding mechanism and holding it stationary in the other position, a master provided adjacent each of said workholders and operatively connected to said workholder to be rotated thereby, each of said grinding mechanisms including a grinding wheel arranged to grind a workpiece on the workholder and said master concurrently, and means for detecting the amount of said master ground by said grinding wheel and emitting a signal to stop the grinding operation.
Claim 3
Dependent Claim
17 words
The apparatus of claim 1 including magnetic means associated with said workholders to retain the workpiece thereon.
Claim 4
Dependent Claim
27 words
The apparatus of claim 1 in which the turn table is circular and the workholders follow an arcuate path in movement from one position to the next.
Claim 5
Dependent Claim
23 words
The apparatus of claim 3 in which said turn table is horizontal and said grinding mechanisms are located vertically above the turn table.
Claim 6
Dependent Claim
23 words
The apparatus of claim 1 including means to move said grinding wheels in a rotary direction in a plane parallel to said workholders.
Claim 7
Dependent Claim
12 words
The apparatus of claim 5 in which the grinding wheels are cup-shaped.
Claim 8
Dependent Claim
32 words
The apparatus of claim 1 including a two speed means for moving the grinding mechanism toward the workpiece with a high speed for setting up operation and a low speed for grinding.
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) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |