Patent US3643383A successfully refreshed from Google Patents.
US3643383A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grinding machines
Assignee: Toyoda Koki KK
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Filing: 1970-08-21
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Granted: 1972-02-22
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Expires: 1990-08-21
Abstract
Abstract In a grinding machine comprising a motor-driven grinding wheel and a headstock for holding a workpiece to be ground by the grinding wheel, the base for supporting the grinding wheel is secured to a stationary bed, a table for supporting the headstock is slidably mounted on the bed and a feed shaft is provided for the table to feed it toward the grinding wheel. The feed shaft is located in a plane perpendicular to the axis of the grinding wheel and passing through substantially the center of the width of the grinding wheel.
Inventors
- 👤 Hiroaki Asano
- 👤 Tsuyoshi Koide
- 👤 Ikuo Ohtsu
- 👤 Shozo Hayashi
- 👤 Hiroshi Kobayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:45
CPC Classifications
B; B24; B24B; B24B5/00; B24B5/01
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
89 words
A grinding machine comprising a stationary bed, a motordriven grinding wheel, a base for supporting said grinding wheel and secured to said bed, a table movably mounted on said bed, a headstock mounted on said table to support a workpiece, and a feed shaft for feeding said table toward said grinding wheel to grind said workpiece by said grinding wheel, said feed shaft being located in a plane perpendicular to the axis of said grinding wheel and passing through substantially the center of the width of said grinding wheel.
Claim 2
Dependent Claim
89 words
A grinding machine comprising a stationary bed, a motordriven grinding wheel, a base for supporting said grinding wheel and secured to said bed, a table movably mounted on said bed, a headstock mounted on said table to support a workpiece, and a feed shaft for feeding said table toward said grinding wheel to grind said workpiece by said grinding wheel, said feed shaft being located in a plane perpendicular to the axis of said grinding wheel and passing through substantially the center of the width of said grinding wheel.
Claim 3
Dependent Claim
131 words
A grinding machine comprising a stationary bed, a grinding wheel base secured to said bed and rotatably supports a grinding wheel, driving means for rotating said grinding wheel, a table movably supported on said bed, a headstock mounted on said table to rotatably support a work spindle, drive means for rotating said work spindle, a feed shaft for said table located in a plane perpendicular to the axis of said grinding wheel and passing through substantially the middle of the width of said grinding wheel, screw means to operatively couple said feed shaft to said table, feed means to drive said feed shaft, and guide means to guide said table in the axial direction of said feed shaft whereby to feed said table to grind a workpiece supported by said headstock.
Claim 4
Dependent Claim
131 words
A grinding machine comprising a stationary bed, a grinding wheel base secured to said bed and rotatably supports a grinding wheel, driving means for rotating said grinding wheel, a table movably supported on said bed, a headstock mounted on said table to rotatably support a work spindle, drive means for rotating said work spindle, a feed shaft for said table located in a plane perpendicular to the axis of said grinding wheel and passing through substantially the middle of the width of said grinding wheel, screw means to operatively couple said feed shaft to said table, feed means to drive said feed shaft, and guide means to guide said table in the axial direction of said feed shaft whereby to feed said table to grind a workpiece supported by said headstock.
Claim 5
Dependent Claim
58 words
The grinding machine according to claim 2 wherein said guide means comprises supporting rollers rotatably mounted on said bed in a plane perpendicular to the axis of said feed shaft and in parallel planes on both sides of said planes, and a supporting member on said table to engage at least the outer periphery of said supporting roller.
Claim 6
Dependent Claim
31 words
The grinding machine according to claim 1 which further comprises means for absorbing vibrations of said table, said means being located in planes parallel to the axis of said feed shaft.
Claim 7
Dependent Claim
51 words
The grinding machine according to claim 1 wherein said grinding wheel base is pivotally mounted on said stationary base about a pivot shaft and wherein there are provided an arcuate guide groove for guiding the pivotal movement of said grinding wheelbase and means to rotate said base about said pivot shaft.
Claim 8
Dependent Claim
35 words
The grinding machine according to claim 2, wherein said feed means for driving said shaft comprises electrohydraulic pulse motors mounted on said bed and said table for rapid feed motion and grinding feed motion respectively.
Claim 9
Dependent Claim
68 words
The grinding machine according to claim 5, wherein said means for rotating said grinding wheelbase comprises a piston cylinder assembly secured on said bed, a sprocket wheel connected to said piston cylinder assembly through gear mechanism, and a continuous chain mounted on said grinding wheelbase and engaged with said sprocket wheel, whereby said grinding wheelbase is pivoted about said pivot shaft by means of said piston cylinder assembly.
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) | 1975-02-21 | 1975-08-23 | 1976-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-21 | 1979-08-23 | 1980-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-21 | 1983-08-23 | 1984-02-22 | $7700.00 | Window Closed / Lapsed |