Patent US3857273A successfully refreshed from Google Patents.
US3857273A
Expired / Lapsed
US
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Toothed forming tool
Assignee: Ex-Cell-O Corp
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Filing: 1973-06-22
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Granted: 1974-12-31
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Expires: 1993-06-22
Abstract
Abstract A toothed forming tool for pressure forming spline teeth, gear teeth and the like on the periphery of a cylindrical workpiece, the relationships of the teeth on the tool with respect to each other being improved whereby the useful life of the tool is increased and flow characteristics of the workpiece material are improved during the process of generating teeth on the workpiece.
Inventors
- 👤 R Miller
- 👤 L Fisset
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:02
CPC Classifications
B; B21; B21H; B21H5/00; B21H5/02; B21H5/027
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
124 words
A tool for pressure forming teeth on the periphery of a cylindrical workpiece, said tool including a body having a leading end and a trailing end and being provided with a working face having a plurality of teeth thereon, a first section of said teeth being disposed between said leading end and said trailing end, each of said teeth in said first section having a configuration conjugate to the configuration of the teeth to be formed on the workpiece and having a pitch line, second, third and fourth sections of teeth being disposed between said first section of teeth and said leading end, the tops of the teeth in said second, third and fourth sections sloping toward said leading end at successively increasing angles.
Claim 2
Dependent Claim
124 words
A tool for pressure forming teeth on the periphery of a cylindrical workpiece, said tool including a body having a leading end and a trailing end and being provided with a working face having a plurality of teeth thereon, a first section of said teeth being disposed between said leading end and said trailing end, each of said teeth in said first section having a configuration conjugate to the configuration of the teeth to be formed on the workpiece and having a pitch line, second, third and fourth sections of teeth being disposed between said first section of teeth and said leading end, the tops of the teeth in said second, third and fourth sections sloping toward said leading end at successively increasing angles.
Claim 3
Dependent Claim
72 words
A tool as set forth in claim 1 wherein the tops of the teeth in said second section are disposed below the tops of the teeth in said first section, the tops of the teeth in said third section are disposed below the tops of the teeth in said second section and tops of the teeth in said fourth section are disposed below the tops of the teeth in said third section.
Claim 4
Dependent Claim
44 words
A tool as set forth in claim 1 wherein the tooth thickness of all of said teeth in said sections as measured on the pitch line thereof Is constant from section to section from the teeth in said first section to said leading end.
Claim 5
Dependent Claim
18 words
A tool as set forth in claim 1 wherein all of said teeth have a common pitch line.
Claim 6
Dependent Claim
36 words
A tool as set forth in claim 1 wherein the distance between the teeth of successive sections as measured on the pitch line thereof is constant from said leading end to said first section of teeth.
Claim 7
Dependent Claim
32 words
A tool as set forth in claim 1 including a fifth section of teeth adjacent said trailing end, the tops of the teeth in said fifth section sloping toward said trailing end.
Claim 8
Dependent Claim
115 words
A tool for pressure forming teeth on the periphery of a cylindrical workpiece, said tool being provided with a working face having teeth thereon and including a leading end and a trailing end, a first section of teeth between said leading end and said trailing end being fully conjugate to the teeth to be formed on said workpiece and having a pitch line, second, third and fourth sections of teeth disposed between said first section of teeth and said leading end, the tops of the teeth of said second, third and fourth sections of teeth successively decreasing in height at successively increasing angles with respect to the tops of the teeth in said first section.
Claim 9
Dependent Claim
115 words
A tool for pressure forming teeth on the periphery of a cylindrical workpiece, said tool being provided with a working face having teeth thereon and including a leading end and a trailing end, a first section of teeth between said leading end and said trailing end being fully conjugate to the teeth to be formed on said workpiece and having a pitch line, second, third and fourth sections of teeth disposed between said first section of teeth and said leading end, the tops of the teeth of said second, third and fourth sections of teeth successively decreasing in height at successively increasing angles with respect to the tops of the teeth in said first section.
Claim 10
Dependent Claim
35 words
A tool as set forth in claim 8 wherein the length of said second and third sections of the teeth is greater than the length of said first section and said fourth section of teeth.
Claim 11
Dependent Claim
52 words
A tool as set forth in claim 9 wherein all of said teeth have a common pitch line and wherein the distance between each of the teeth of each of said successive sections as measured on the pitch line thereof is constant from said leading end to said first section of teeth.
Claim 12
Dependent Claim
24 words
A tool as set forth in claim 10 wherein the linear pitch of all of the teeth in all of said sections is constant.
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) | 1977-12-30 | 1978-07-01 | 1978-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-30 | 1982-07-01 | 1982-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-30 | 1986-07-01 | 1986-12-31 | $7700.00 | Window Closed / Lapsed |