Patent US3774349A successfully refreshed from Google Patents.
US3774349A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grinding machine
Assignee: Cincinnati Milacron Heald Corp
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Filing: 1972-03-30
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Granted: 1973-11-27
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Expires: 1992-03-30
Abstract
Abstract A grinding machine making use of a conical abrasive wheel wherein provision is made for performing a rough grind with the large end of the wheel and a finish grind with the small end of the wheel, a gage being inserted into the workpiece during the finish grind only.
Inventors
- 👤 H Uhtenwoldt
- 👤 R Hatstat
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:36
CPC Classifications
B; B24; B24B; B24B49/00; B24B49/02; B24B49/04
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
232 words
A grinding machine for generating a surface of revolution on a workpiece by the abrasive process, comprising a. a base, b. a workhead mounted on the base for supporting and rotating the workpiece about the axis of the surface of revolution, c. a wheelhead mounted on the base and having a rotatable spindle carrying an abrasive wheel at its outer end, the wheel being shaped with a frusto-conical surface with the small end located at the outward end of the spindle, the wheelhead being arranged so that the axis of the spindle lies at a substantial angle to the axis of the surface and so that the generatrix of the surface of the wheel closest to the workpiece surface is parallel to the axis of the workpiece surface, d. means bringing about relative movements between the workhead and the wheelhead to bring about a grinding cycle, the relative movements consisting of movements perpendicular and parallel to the said axis of the surface of revolution, the means serving to bring about movement parallel to the axis from a first position wherein the large portion of the wheel lies within the workpiece to a second position wherein the small portion of the wheel lies within the workpiece, and e. a gage which is introduced into the space between the surface of revolution and the wheel when the wheel is in the said second position.
Claim 2
Dependent Claim
232 words
A grinding machine for generating a surface of revolution on a workpiece by the abrasive process, comprising a. a base, b. a workhead mounted on the base for supporting and rotating the workpiece about the axis of the surface of revolution, c. a wheelhead mounted on the base and having a rotatable spindle carrying an abrasive wheel at its outer end, the wheel being shaped with a frusto-conical surface with the small end located at the outward end of the spindle, the wheelhead being arranged so that the axis of the spindle lies at a substantial angle to the axis of the surface and so that the generatrix of the surface of the wheel closest to the workpiece surface is parallel to the axis of the workpiece surface, d. means bringing about relative movements between the workhead and the wheelhead to bring about a grinding cycle, the relative movements consisting of movements perpendicular and parallel to the said axis of the surface of revolution, the means serving to bring about movement parallel to the axis from a first position wherein the large portion of the wheel lies within the workpiece to a second position wherein the small portion of the wheel lies within the workpiece, and e. a gage which is introduced into the space between the surface of revolution and the wheel when the wheel is in the said second position.
Claim 3
Dependent Claim
31 words
A grinding machine as recited in claim 1, wherein the gage is mounted on the workhead and is reciprocable relative thereto from an inoperative position to a position within the workpiece.
Claim 4
Dependent Claim
61 words
A grinding machine as recited in claIm 1, wherein the workhead is mounted on a table which in turn is slidable on ways for movement over the base in a direction perpendicular to the axis of the surface and wherein the wheelhead is mounted on a table which in turn is mounted on ways for movement parallel to the said axis.
Claim 5
Dependent Claim
31 words
A grinding machine as recited in claim 1, wherein a dressing apparatus is provided that is operative to dress the surface of the wheel during the loading of the grinding cycle.
Claim 6
Dependent Claim
40 words
A grinding machine as recited in claim 1, wherein the gage consists of two thin fingers whose ends engage diametrically opposite portions of the workpiece surface and who generate an electrical signal proportional to the diameter of the workpiece surface.
Claim 7
Dependent Claim
40 words
A grinding machine as recited in claim 5, wherein a switch is associated with the said means to initiate the movement of the wheel from the first to the second position when the surface of revolution reaches a pre-determined size.
Claim 8
Dependent Claim
48 words
A grinding machine as recited in claim 6, wherein a hydraulic cylinder is provided to bring about the movement of the wheelhead from the first to the second position and a valve controls the motion of this hydraulic cylinder and is under the control of the said switch.
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) | 1976-11-26 | 1977-05-28 | 1977-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-26 | 1981-05-28 | 1981-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-26 | 1985-05-28 | 1985-11-27 | $7700.00 | Window Closed / Lapsed |