US3777441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grinding machine
Assignee: Toyoda Koki KK
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Filing: 1972-06-02
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Granted: 1973-12-11
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Expires: 1992-06-02
Abstract
Abstract A grinding machine comprises a feed means for effecting movement of a grinding wheel towards and away from a workpiece. A sizing device generates a sizing signal in response to the diameter of the workpiece for stopping the feed movement at an appropriate time in order to effect a spark out operation. A detector detects the grinding resistance applied on the grinding wheel. A timer is energized during the movement of the grinding wheel towards the workpiece and is timed out after a predetermined time period. If the grinding resistance becomes substantially of a zero value before the timer is timed out, then the grinding wheel is caused to be retracted from the workpiece and a succeeding grinding operation is rendered operative.
Inventors
- 👤 M Kurimoto
- 👤 H Asano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:57
CPC Classifications
B; B23; B23Q; B23Q15/00; B24; B24B; B24B47/00; B24B47/20; B24B49/00; B24B49/02; B24B49/04; B24B5/00; B24B5/36; B24B5/42
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
207 words
A grinding machine comprising: a work support for supporting a workpiece; a wheel support for supporting a grinding wheel; feed means for effecting movement of said wheel support towards and away from said support; sizing means adapted to be engaged with said workpiece to generate a sizing signal in response to the diameter thereof; means for detecting grinding resistance applied on said grinding wheel during a grinding operation; timer means energized during the movement of said wheel support towards said work support which is timed out after a predetermined time period; control means responsive to the sizing signal for Stopping the movement of said wheel support against said work support in order to effect a spark out operation before said timer means is timed out; control means operable, when said timer means is timed out before the grinding resistance becomes a predetermined value in accordance with the spark out operation, to cause retraction of said wheel support from said work support and to render a succeeding grinding operation inoperative; and, control means operable, when the grinding resistance becomes a predetermined value before said timer means is timed out, to cause retraction of said wheel support from said work support and to render the succeeding grinding operation operative.
Claim 2
Dependent Claim
207 words
A grinding machine comprising: a work support for supporting a workpiece; a wheel support for supporting a grinding wheel; feed means for effecting movement of said wheel support towards and away from said support; sizing means adapted to be engaged with said workpiece to generate a sizing signal in response to the diameter thereof; means for detecting grinding resistance applied on said grinding wheel during a grinding operation; timer means energized during the movement of said wheel support towards said work support which is timed out after a predetermined time period; control means responsive to the sizing signal for Stopping the movement of said wheel support against said work support in order to effect a spark out operation before said timer means is timed out; control means operable, when said timer means is timed out before the grinding resistance becomes a predetermined value in accordance with the spark out operation, to cause retraction of said wheel support from said work support and to render a succeeding grinding operation inoperative; and, control means operable, when the grinding resistance becomes a predetermined value before said timer means is timed out, to cause retraction of said wheel support from said work support and to render the succeeding grinding operation operative.
Claim 3
Dependent Claim
247 words
A grinding machine comprising: a work support for supporting a workpiece; a wheel support for supporting a grinding wheel; feed means for effecting movement of said wheel support towards and away from said work support; sizing means adapted to be engaged with said workpiece to generate a sizing signal in response to the diameter thereof; means for detecting grinding resistance applied on said grinding wheel during a grinding operation; timer means energized during the movement of said wheel support towards said work support which is timed out after a predetermined time period; first control means responsive to the sizing signal for stopping the movement of said wheel support against said work support in order to effect a spark out operation before said timer means is timed out; second control means energized when the grinding resistance becomes substantially of a zero value in accordance with the spark out operation, said second control means being operable, when energized before said timer means is timed out, to cause retraction of said wheel support from said work support; third control means operable, when said timer means is timed out after said second control means is energized, to render a succeeding grinding operation operative; and, fourth control means operable, when said timer means is timed out before said second control means is energized, to cause retraction of said wheel support from said work support and to cause said third control means to become inoperative to thereby render the succeeding grinding operation inoperative.
Claim 4
Dependent Claim
247 words
A grinding machine comprising: a work support for supporting a workpiece; a wheel support for supporting a grinding wheel; feed means for effecting movement of said wheel support towards and away from said work support; sizing means adapted to be engaged with said workpiece to generate a sizing signal in response to the diameter thereof; means for detecting grinding resistance applied on said grinding wheel during a grinding operation; timer means energized during the movement of said wheel support towards said work support which is timed out after a predetermined time period; first control means responsive to the sizing signal for stopping the movement of said wheel support against said work support in order to effect a spark out operation before said timer means is timed out; second control means energized when the grinding resistance becomes substantially of a zero value in accordance with the spark out operation, said second control means being operable, when energized before said timer means is timed out, to cause retraction of said wheel support from said work support; third control means operable, when said timer means is timed out after said second control means is energized, to render a succeeding grinding operation operative; and, fourth control means operable, when said timer means is timed out before said second control means is energized, to cause retraction of said wheel support from said work support and to cause said third control means to become inoperative to thereby render the succeeding grinding operation inoperative.
Claim 5
Dependent Claim
32 words
A grinding machine as set forth in claim 2, wherein said second control means is operable, when energized before said timer means is timed out, to render said fourth control means inoperative.
Claim 6
Dependent Claim
233 words
A grinding machine comprising: a work support for supporting a workpiece; a wheel support for supporting a grinding wheel; feed means for effecting movement of said wheel support towards and away from said work support; sizing means adapted to be engaged with said workpiece to generate a sizing signal in response to the diameter thereof; means for detecting grinding resistance applied on said grinding wheel during a grinding operation; timer means energized during the movement of said wheel support towards said work support which is timed out after a predetermined time period; first control means responsive to the sizing signal for stopping the movement of said wheel support against said work support in order to effect a spark out operation before said timer means is timed out; second control means energized when the grinding resistance becomes substantially of a zero value in accordance with the spark out operation; third control means operable, when said timer means is timed out after said second control means is energized, to cause retraction of said wheel support from said work support and to render a succeeding grinding operation operative; and, fourth control means operable, when said timer means is timed out before said second control means is energized, to cause retraction of said wheel support from said work support and to cause said third control means to become inoperative to thereby render the succeeding grinding operation inoperative.
Claim 7
Dependent Claim
233 words
A grinding machine comprising: a work support for supporting a workpiece; a wheel support for supporting a grinding wheel; feed means for effecting movement of said wheel support towards and away from said work support; sizing means adapted to be engaged with said workpiece to generate a sizing signal in response to the diameter thereof; means for detecting grinding resistance applied on said grinding wheel during a grinding operation; timer means energized during the movement of said wheel support towards said work support which is timed out after a predetermined time period; first control means responsive to the sizing signal for stopping the movement of said wheel support against said work support in order to effect a spark out operation before said timer means is timed out; second control means energized when the grinding resistance becomes substantially of a zero value in accordance with the spark out operation; third control means operable, when said timer means is timed out after said second control means is energized, to cause retraction of said wheel support from said work support and to render a succeeding grinding operation operative; and, fourth control means operable, when said timer means is timed out before said second control means is energized, to cause retraction of said wheel support from said work support and to cause said third control means to become inoperative to thereby render the succeeding grinding operation inoperative.
Claim 8
Dependent Claim
32 words
A grinding machine as set forth in claim 4, wherein said second control means is operable, when energized before said timer means is timed out; to render said fourth control means inoperative.
Claim 9
Dependent Claim
247 words
A grinding machine comprising: a work support for supporting a workpiece; a wheel support for supporting a grinding wheel; feed means for effecting movement of said wheel support towards and away from said work support; sizing means adapted to be engaged with said workpiece to generate a sizing signal in response to the diameter thereof; means for detecting grinding resistance applied on said grinding wheel during a grinding operation; timer means energized during the movement of said wheel support towards said work support which is timed out after a predetermined time period; first control means responsive to the sizing signal for stopping the movement of said wheel support against said work support in order to effect a spark out operation before said timer means is timed out; second control means energized when the grinding resistance becomes substantially of a zero value in accordance with the spark out operation, said second control means being operable, when energized before said timer means is timed out, to cause retraction of said wheel support from said work support; third control means operable, when said second control means is energized before said timer means is timed out, to render a succeeding grinding operation operative; and, fourth control means operable, when said timer means is timed out before said second control means is energized, to cause retraction of said wheel support from said work support and to cause said third control means to become inoperative to thereby render the succeeding grinding operation inoperative.
Claim 10
Dependent Claim
247 words
A grinding machine comprising: a work support for supporting a workpiece; a wheel support for supporting a grinding wheel; feed means for effecting movement of said wheel support towards and away from said work support; sizing means adapted to be engaged with said workpiece to generate a sizing signal in response to the diameter thereof; means for detecting grinding resistance applied on said grinding wheel during a grinding operation; timer means energized during the movement of said wheel support towards said work support which is timed out after a predetermined time period; first control means responsive to the sizing signal for stopping the movement of said wheel support against said work support in order to effect a spark out operation before said timer means is timed out; second control means energized when the grinding resistance becomes substantially of a zero value in accordance with the spark out operation, said second control means being operable, when energized before said timer means is timed out, to cause retraction of said wheel support from said work support; third control means operable, when said second control means is energized before said timer means is timed out, to render a succeeding grinding operation operative; and, fourth control means operable, when said timer means is timed out before said second control means is energized, to cause retraction of said wheel support from said work support and to cause said third control means to become inoperative to thereby render the succeeding grinding operation inoperative.
Claim 11
Dependent Claim
32 words
A grinding machine as set forth in claim 6, wherein said second control means is operable, when energized before said timer means is timed out, to render said fourth control means inoperative.
Claim 12
Dependent Claim
231 words
A grinding machine comprising: a work support for supporting a workpiece; a wheel support for supporting a grinding wheel; feed means for effecting movement of said wheel support towards and away from said work support; sizing means adapted to be engaged with said workpiece to generate a sizing signal in response to the diameter thereof; means for detecting grinding resistance applied on said grinding wheel during a grinding operation; timer means energized during the movement of said wheel support towards said work support which is timed out after a predetermined time period; first control means responsive to the sizing signal for stopping the movement of said wheel support against said work support to effect a spark out operation before said timer means is timed out; second control means energized when the grinding resistance becomes substantially of a zero value in accordance with the spark out operation; thrid control means operable, when said second control means is energized before said timer means is timed out, to cause retraction of said wheel support from said work support and to render a succeeding grinding operation operative, and, fourth control means operable, when said timer means is timed out before said second control means is energized, to cause retraction of said wheel support from said work support and to cause said third control means to become inoperative to thereby render the succeeding grinding operation inoperative.
Claim 13
Dependent Claim
231 words
A grinding machine comprising: a work support for supporting a workpiece; a wheel support for supporting a grinding wheel; feed means for effecting movement of said wheel support towards and away from said work support; sizing means adapted to be engaged with said workpiece to generate a sizing signal in response to the diameter thereof; means for detecting grinding resistance applied on said grinding wheel during a grinding operation; timer means energized during the movement of said wheel support towards said work support which is timed out after a predetermined time period; first control means responsive to the sizing signal for stopping the movement of said wheel support against said work support to effect a spark out operation before said timer means is timed out; second control means energized when the grinding resistance becomes substantially of a zero value in accordance with the spark out operation; thrid control means operable, when said second control means is energized before said timer means is timed out, to cause retraction of said wheel support from said work support and to render a succeeding grinding operation operative, and, fourth control means operable, when said timer means is timed out before said second control means is energized, to cause retraction of said wheel support from said work support and to cause said third control means to become inoperative to thereby render the succeeding grinding operation inoperative.
Claim 14
Dependent Claim
32 words
A grinding machine as set forth in claim 8, wherein said second control means is operable, when energized before said timer means is timed out, to render said fourth control means inoperative.
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) | 1976-12-10 | 1977-06-11 | 1977-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-10 | 1981-06-11 | 1981-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-10 | 1985-06-11 | 1985-12-11 | $7700.00 | Window Closed / Lapsed |