Patent US3739528A successfully refreshed from Google Patents.
US3739528A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grinding machine
Assignee: Cincinnati Milacron Heald Corp
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Filing: 1971-05-17
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Granted: 1973-06-19
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Expires: 1991-05-17
Abstract
Abstract A grinding machine in which the abrasive wheel grinds not only a cylindrical surface, but also spaced radial surfaces of a workpiece, and in which a dressing apparatus is provided for dressing the end surfaces of the wheel.
Inventors
- 👤 E Robillard
- 👤 H Uhtenwoldt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:00
CPC Classifications
B; B24; B24B; B24B5/00; B24B5/02; B24B5/06; B24B49/00; B24B49/18
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
253 words
A grinding machine for generating a surface of revolution on a workpiece, comprising a. a base, b. a workhead table mounted on the base and having a holder to support the workpiece, c. a wheelhead table mounted on the base and having a rotatable spindle for carrying an abrasive wheel, d. feed means for bringing about relative movement transversely of the axis of the surface of revolution between the tables to bring a cylindrical surface of the wheel into grinding contact with the workpiece, e. a dressing apparatus including two spaced facing diamonds for dressing the end surfaces of the wheel, f. traverse means for bringing about relatiVe movement longitudinally of the axis, including a first means to place the wheel in a first position generally co-extensive with the said surface of the workpiece and a second means to place the wheel in a second position generally co-extensive with the said dressing apparatus, the first means being operative to reciprocate the wheel on a first stroke to bring one end surface into grinding contact with a radial portion of the workpiece surface and then to bring the other end surface into grinding contact with another radial portion of the workpiece surface, the second means being operative to move the wheel on a second stroke to bring the said one end surface of the wheel into dressing contact with one of the diamonds and then to move the said other end surface of the wheel into dressing contact with the other of the diamonds.
Claim 2
Dependent Claim
253 words
A grinding machine for generating a surface of revolution on a workpiece, comprising a. a base, b. a workhead table mounted on the base and having a holder to support the workpiece, c. a wheelhead table mounted on the base and having a rotatable spindle for carrying an abrasive wheel, d. feed means for bringing about relative movement transversely of the axis of the surface of revolution between the tables to bring a cylindrical surface of the wheel into grinding contact with the workpiece, e. a dressing apparatus including two spaced facing diamonds for dressing the end surfaces of the wheel, f. traverse means for bringing about relatiVe movement longitudinally of the axis, including a first means to place the wheel in a first position generally co-extensive with the said surface of the workpiece and a second means to place the wheel in a second position generally co-extensive with the said dressing apparatus, the first means being operative to reciprocate the wheel on a first stroke to bring one end surface into grinding contact with a radial portion of the workpiece surface and then to bring the other end surface into grinding contact with another radial portion of the workpiece surface, the second means being operative to move the wheel on a second stroke to bring the said one end surface of the wheel into dressing contact with one of the diamonds and then to move the said other end surface of the wheel into dressing contact with the other of the diamonds.
Claim 3
Dependent Claim
41 words
A grinding machine as recited in claim 1, where a control is connected to the first and second means to lengthen the second stroke at the time of every dressing operation and to lengthen the first stroke by a commensurate amount.
Claim 4
Dependent Claim
37 words
A grinding machine as recited in claim 1, wherein the dressing apparatus includes a pair of longitudinally-spaced arms swingably mounted on a common longitudinal axis, the arms being facing surfaces on which the two diamonds are mounted.
Claim 5
Dependent Claim
38 words
A grinding machine as recited in claim 1, wherein the traverse means includes a cylinder for producing the longitudinal movement to the first position and the second position and stepping motor for producing the first and second strokes.
Claim 6
Dependent Claim
104 words
A grinding machine as recited in claim 4, wherein the workhead table is provided with a first stop to locate the abrasive wheel in the workpiece at the center of the first stroke and with a second stop to locate the abrasive wheel adjacent the dressing apparatus at the center of the second stroke, and wherein a compensation slide is located between the two stops and is drivingly connected to the stepping motor, so that the introduction of pulses to the stepping motor serves to move the workhead table and workpiece alternately to one side and the other of the centers of the strokes.
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) | 1976-06-18 | 1976-12-18 | 1977-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-18 | 1980-12-18 | 1981-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-18 | 1984-12-18 | 1985-06-19 | $7700.00 | Window Closed / Lapsed |