US3589073A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grinding device
Assignee: Okamoto Kohsakukikai Seisakusho KK
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Filing: 1969-01-27
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Granted: 1971-06-29
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Expires: 1989-01-27
Abstract
Abstract A gear grinder having a prime mover to drive both a grindstone and a work to be ground in synchronism with each other. The gear grinder has a power transmission means to deliver output from the prime mover to both the work and the grindstone for moving them, which transmission means includes a uniform universal joint having a spur gear slidably engaging a pinion located on power receiving side. The spur gear slides along said pinion as one of the work and the grindstone moves relative to the other.
Inventors
- 👤 Isamu Okamoto
- 👤 Mutsuo Hosoi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:10
CPC Classifications
B; B23; B23F; B23F19/00; B23F19/002; B23F19/007; B23F3/00; B23F5/00; B23F5/02; B23F5/04
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
199 words
A gear grinder comprising a base; a grinding wheel; a head supporting the grinding wheel, saId head being mounted on said base so as to be movable in longitudinal and transverse direction of said base and pivotable with respect thereto; a worktable for supporting a workpiece to be ground into a gear, said table being mounted on said base so as to be movable in a vertical direction and rotatable within the required helix angle of the workpiece gear; a driving prime mover; a power transmission means for transmitting power from said prime mover to both the grinding wheel and the workpiece gear; and a crowning mechanism for effecting a crowning operation on the workpiece gear, said power transmission means including a first constant velocity universal joint associated with the grinding wheel head and a second constant velocity universal joint associated with said worktable, at least one of said universal joints being connected to a spur gear, said spur gear slidably engaging a pinion, whereby said spur gear slides along said pinion in response to either the vertical movement of the worktable or the movement of the grinding wheel head in the longitudinal and transverse directions of the base.
Claim 2
Dependent Claim
199 words
A gear grinder comprising a base; a grinding wheel; a head supporting the grinding wheel, saId head being mounted on said base so as to be movable in longitudinal and transverse direction of said base and pivotable with respect thereto; a worktable for supporting a workpiece to be ground into a gear, said table being mounted on said base so as to be movable in a vertical direction and rotatable within the required helix angle of the workpiece gear; a driving prime mover; a power transmission means for transmitting power from said prime mover to both the grinding wheel and the workpiece gear; and a crowning mechanism for effecting a crowning operation on the workpiece gear, said power transmission means including a first constant velocity universal joint associated with the grinding wheel head and a second constant velocity universal joint associated with said worktable, at least one of said universal joints being connected to a spur gear, said spur gear slidably engaging a pinion, whereby said spur gear slides along said pinion in response to either the vertical movement of the worktable or the movement of the grinding wheel head in the longitudinal and transverse directions of the base.
Claim 3
Dependent Claim
60 words
A gear grinder as claimed in claim 1, wherein said prime mover comprises an electric motor; and a spindle having one end adapted to carry said grinding wheel being directly connected to said motor, said spindle further being connected in driving relation to said first constant velocity universal joint; and a gear train being associated with said grinding wheel head.
Claim 4
Dependent Claim
83 words
A gear grinder as claimed in claim 2, comprising a grinding wheel inclining mechanism adapted to effect inclination of the grinding wheel so that the lead angle of said wheel in the vertical plane includes the axis of said grinding wheel spindle, said grinding wheel inclining mechanism including a grinding wheel head lower board and a grinding wheel head upper board pivotable relative to said lower board; and a tapered slide for controlling the inclination between said lower board and said upper board.
Claim 5
Dependent Claim
57 words
A gear grinder as claimed in claim 1, comprising a vertically reciprocatable plate adapted to pivotally support said worktable; a worm gear secured to said worktable; and worm engaging means on said reciprocatable plate for engaging said worm gear whereby the worktable may be rotated in the plane of the required helix angle of the workpiece gear.
Claim 6
Dependent Claim
138 words
A gear grinder as claimed in claim 1, comprising means for determining the degree of crowning to be effected to said workpiece gear, said means including a first roller pivotally fastened to a stationary portion of said grinder in proximity to said worktable, a second roller fastened to said base, an endless rope encompassing and tensioned between said rollers, guide means adapted to guide said rope between said rollers, said endless rope being fastened to said worktable so as to rotate about said rollers in response to vertical movement of said workpiece gear, a template being operatively attached to said endless rope so as to correspondingly move in response to rotation of said endless rope, and an actuator being operatively connected to said template so as to actuate said grinding wheel in response to movement of said template.
Claim 7
Dependent Claim
88 words
A gear grinder as claimed in claim 5, comprising a crowning adjusting mechanism including a slider positioned on said base so as to be slidable thereon in response to movement of said actuator, an adjusting base rotatably secured to said slider, and including a crowning shaft adapted to control the degree of crowning of said workpiece gear in response to the angular position of said adjusting base, whereby the crowning operation on the workpiece gear is effected through suitable magnification in conformance with the shape of the template.
Claim 8
Dependent Claim
70 words
A gear grinder as claimed in claim 1, comprising a grinding wheel head base mounted on said gear grinder base so as to be slidable in one direction relative thereto, and a grinding wheel head lower board being mounted on said grinding wheel head base so as to be manually or automatically moVable perpendicular to said direction, said grinding wheel head being mounted on said grinding wheel head lower board.
Claim 9
Dependent Claim
31 words
A gear grinder as claimed in claim 7, wherein said grinding wheel head base is adapted to be moved whereby said grinding wheel may come into contact with said workpiece gear.
Claim 10
Dependent Claim
36 words
A gear grinder as claimed in claim 1, comprising a hydraulic cylinder means including a vertically reciprocatable member, said worktable being secured to said hydraulic cylinder so as to reciprocate in unison with said reciprocatable member.
Claim 11
Dependent Claim
22 words
A gear grinder as claimed in claim 5, wherein said actuator comprises a hydraulic servomechanism adapted to be actuated by said template.
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) | 1974-06-28 | 1974-12-28 | 1975-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-28 | 1978-12-28 | 1979-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-28 | 1982-12-28 | 1983-06-29 | $7700.00 | Window Closed / Lapsed |