Patent US3953997A successfully refreshed from Google Patents.
US3953997A
Expired / Lapsed
US
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Cutting tool faces
Assignee: Marwin Cutting Tools Ltd
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Filing: 1974-12-13
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Granted: 1976-05-04
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Expires: 1994-12-13
Abstract
Abstract A method for producing a cutting face from a hard cutting material for engineer's tools comprising, essentially, presenting the metal stock to a feed slot within a forming core, heating the same to its deformation temperature and then forcing now deformed stock through said forming core into the desired shape. A helical cutting face produced by such method having a length greater than one-third its total lead; a helix angle in the range of 10°-45°; being of a length of one and one-half inches upward depending upon the particular tool requirement; and being of any desired cross-section.
Inventors
- 👤 Dennis Harry Wale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:47
CPC Classifications
B; B21; B21D; B21D53/00; B21D53/60; B21D53/64; Y; Y10; Y10S; Y10S76/00; Y10S76/11
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
87 words
A method of shaping a helical face piece of hard cutting material for an engineer's tool which comprises providing a discrete piece of hard cutting material to be shaped, being free at its ends, providing a former, providing a source of heat adjacent the former capable of providing a temperature at which the piece is deformable, subjecting the piece for indirect elevation to said deformable temperature, then introducing the heated piece to the former which enclosingly accepts the same, and then forcing the piece through the former.
Claim 2
Independent Claim
87 words
A method of shaping a helical face piece of hard cutting material for an engineer's tool which comprises providing a discrete piece of hard cutting material to be shaped, being free at its ends, providing a former, providing a source of heat adjacent the former capable of providing a temperature at which the piece is deformable, subjecting the piece for indirect elevation to said deformable temperature, then introducing the heated piece to the former which enclosingly accepts the same, and then forcing the piece through the former.
Claim 3
Dependent Claim
36 words
A method of shaping a helical face piece as defined in claim 1 and further characterized by said former having a helically formed feed path and forcing the piece through the said helically formed feed path.
Claim 4
Dependent Claim
27 words
A method of shaping a helical face piece as defined in claim 1 and further characterized by said piece of hard cutting material being of tungsten carbide.
Claim 5
Dependent Claim
48 words
A method of shaping a helical face piece as defined in claim 1 and further characterized by said piece of hard cutting material being of substantially the same cross-section as is desired in the finished piece, and wherein the formed piece subsequent to forming is allowed to cool.
Claim 6
Dependent Claim
27 words
A method of shaping a helical face piece as defined in claim 4 and further characterized by said piece of hard cutting material being of tungsten carbide.
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) | 1979-05-04 | 1979-11-03 | 1980-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-04 | 1983-11-03 | 1984-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-04 | 1987-11-03 | 1988-05-04 | $7700.00 | Window Closed / Lapsed |