Patent US3699728A successfully refreshed from Google Patents.
US3699728A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for internal plunge grinding
Assignee: SHEFFIELD MACHINE TOOL COMPANY A CORP OF OH
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Filing: 1970-06-22
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Granted: 1972-10-24
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Expires: 1990-06-22
Abstract
Abstract An internally lubricated grinding wheel arrangement for plunge or form grinding in which the voids of a porous grinding wheel are occluded by lubricant applied internally while in the grinding zone to prevent wheel loading. The wheel is cooled by directing a coolant supply externally of the wheel.
Inventors
- 👤 Dante S Giardini
- 👤 Indarmohan S Chhabra
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:30
CPC Classifications
B; B24; B24B; B24B55/00; B24B55/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
111 words
An internally lubricated grinding wheel arrangement for a grinding machine comprising: a relatively porous grinding wheel member; means mounting said grinding wheel member for rotation and advancement into a workpiece; lubricating means for supplying a liquid internally to said grinding wheel member to produce outward migration of said liquid through said grinding wheel member voids and including a circumferentially extending internal chamber in said grinding wheel member and means for directing said liquid into said chamber; and cooling means for directing a coolant supply externally of said grinding wheel member to the grinding zone, whereby said grinding wheel is lubricated by internal liquid flow, while being cooled by external liquid flow.
Claim 2
Dependent Claim
111 words
An internally lubricated grinding wheel arrangement for a grinding machine comprising: a relatively porous grinding wheel member; means mounting said grinding wheel member for rotation and advancement into a workpiece; lubricating means for supplying a liquid internally to said grinding wheel member to produce outward migration of said liquid through said grinding wheel member voids and including a circumferentially extending internal chamber in said grinding wheel member and means for directing said liquid into said chamber; and cooling means for directing a coolant supply externally of said grinding wheel member to the grinding zone, whereby said grinding wheel is lubricated by internal liquid flow, while being cooled by external liquid flow.
Claim 3
Dependent Claim
147 words
An internally lubricated grinding wheel arrangement for a grinding machine comprising: a relatively porous grinding wheel member; means mounting said grinding wheel member for rotation and advancement into a workpiece; lubricating means for supplying a liquid internally to said grinding wheel member to produce outward migration of said liquid through said grinding wheel member voids including metering means having a plurality of pockets arranged circumferentially about said grinding wheel member and further including an internal circumferential passage having a radially outer surface defined at least in part by a portion of said grinding wheel member, and also including passage means providing a fluid connection between each of said pockets and said chamber; and cooling means for directing a coolant supply externally of said grinding wheel member to the grinding zone, whereby said grinding wheel is lubricated by internal liquid flow, while being cooled by external liquid flow.
Claim 4
Dependent Claim
147 words
An internally lubricated grinding wheel arrangement for a grinding machine comprising: a relatively porous grinding wheel member; means mounting said grinding wheel member for rotation and advancement into a workpiece; lubricating means for supplying a liquid internally to said grinding wheel member to produce outward migration of said liquid through said grinding wheel member voids including metering means having a plurality of pockets arranged circumferentially about said grinding wheel member and further including an internal circumferential passage having a radially outer surface defined at least in part by a portion of said grinding wheel member, and also including passage means providing a fluid connection between each of said pockets and said chamber; and cooling means for directing a coolant supply externally of said grinding wheel member to the grinding zone, whereby said grinding wheel is lubricated by internal liquid flow, while being cooled by external liquid flow.
Claim 5
Dependent Claim
29 words
The arrangement of claim 2 further including means for directing said liquid into said pockets. 4. The arrangement of claim 2 further including metering orifices in said passage means.
Claim 6
Dependent Claim
39 words
The arrangement of claim 4 wherein said metering orifices control the liquid flow so that the surface of the grinding wheel member is just wetted by the outward migration at the rate of rotation of said grinding wheel member.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-24 | 1976-04-24 | 1976-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-24 | 1980-04-24 | 1980-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-24 | 1984-04-24 | 1984-10-24 | $7700.00 | Window Closed / Lapsed |