US3777345A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tool for gear finish forming
Assignee: Machine Tool Divisional Services Ltd
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Filing: 1972-09-18
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Granted: 1973-12-11
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Expires: 1992-09-18
Abstract
Abstract A toothed tool for finish forming, by rolling, a cylindrical or helical work gear, said tool having, in the flanks of its teeth, serrations extending perpendicular to the axis of the tool which define flutes in the tooth flanks and intervening lands, the flutes on each tooth flank extending alternately from the tip towards the root and from the root towards the tip and extending along part only of the length of the tooth flank and being so disposed that corresponding flutes on successive tooth flanks are disposed helically on the circumference of the tool.
Inventors
- 👤 G Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:41
CPC Classifications
B; B23; B23F; B23F21/00; B23F21/28; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49462; Y10T29/49467; Y10T29/49471
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
95 words
A toothed tool for finish forming, by rolling, a cylindrical or helical work gear, said tool having, in the flanks of its teeth, serrations extending perpendicular to the axis of the tool which define flutes in the tooth flanks and intervening lands, the flutes on each tooth flank extending alternately from the tip towards the root and from the root towards the tip and extending along part only of the length of the tooth flank and being so disposed that corresponding flutes on successive tooth flanks are disposed helically on the circumference of the tool.
Claim 2
Dependent Claim
95 words
A toothed tool for finish forming, by rolling, a cylindrical or helical work gear, said tool having, in the flanks of its teeth, serrations extending perpendicular to the axis of the tool which define flutes in the tooth flanks and intervening lands, the flutes on each tooth flank extending alternately from the tip towards the root and from the root towards the tip and extending along part only of the length of the tooth flank and being so disposed that corresponding flutes on successive tooth flanks are disposed helically on the circumference of the tool.
Claim 3
Dependent Claim
27 words
A tool as claimed in claim 1, in which the length of the flutes is from 50 to 90 percent of the length of the tooth flanks.
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) | 1976-12-10 | 1977-06-11 | 1977-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-10 | 1981-06-11 | 1981-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-10 | 1985-06-11 | 1985-12-11 | $7700.00 | Window Closed / Lapsed |