Patent US3713323A successfully refreshed from Google Patents.
US3713323A
Expired / Lapsed
US
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Die for cold drawing
Assignee: Individual
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Filing: 1970-10-21
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Granted: 1973-01-30
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Expires: 1990-10-21
Abstract
Abstract A die and method for cold drawing of metal wire, the die having a substantially circular passage extending throughout its length and tapering from an inlet to an outlet, there being at least three spaced apart grooves extending spirally about the passage and intervened by an arcuate surface of the passage. The grooves are of substantially the same cross section at the inlet and outlet ends of the die. This application is a continuing divisional application on applicant''s copending U.S. application, Ser. No. 808,594, filed Mar. 19, 1969.
Inventors
- 👤 I Ivanier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:46
CPC Classifications
F; F16; F16B; F16B33/00; F16B33/02; B; B21; B21C; B21C3/00; B21C3/02; B21C3/04
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
77 words
A die for cold drawing metal wire comprising, a die body having a drawing passage of substantially circular cross-section throughout its length and tapering from an inlet to an outlet, at least three equally spaced apart grooves extending spirally about said passage with adjacent grooves intervened by a concave surface of said passage, said grooves being of substantially the same cross-secTional shape at said inlet and said outlet and extending the full working length of said die.
Claim 2
Dependent Claim
77 words
A die for cold drawing metal wire comprising, a die body having a drawing passage of substantially circular cross-section throughout its length and tapering from an inlet to an outlet, at least three equally spaced apart grooves extending spirally about said passage with adjacent grooves intervened by a concave surface of said passage, said grooves being of substantially the same cross-secTional shape at said inlet and said outlet and extending the full working length of said die.
Claim 3
Dependent Claim
77 words
A die for cold drawing metal wire comprising, a die body having a drawing passage of substantially circular cross-section throughout its length and tapering from an inlet to an outlet, at least three equally spaced apart grooves extending spirally about said passage with adjacent grooves intervened by a concave surface of said passage, said grooves being of substantially the same cross-secTional shape at said inlet and said outlet and extending the full working length of said die.
Claim 4
Dependent Claim
77 words
A die for cold drawing metal wire comprising, a die body having a drawing passage of substantially circular cross-section throughout its length and tapering from an inlet to an outlet, at least three equally spaced apart grooves extending spirally about said passage with adjacent grooves intervened by a concave surface of said passage, said grooves being of substantially the same cross-secTional shape at said inlet and said outlet and extending the full working length of said die.
Claim 5
Dependent Claim
18 words
A die as defined in claim 1, wherein said passage has a taper of 1* to 12* .
Claim 6
Dependent Claim
46 words
A die as defined in claim 1, wherein each said groove is substantially triangular in shape and has a root, and wherein the root dimension of said cross-sectional shape at said inlet is about equal to the root dimension of said cross-sectional shape at said outlet.
Claim 7
Dependent Claim
45 words
A die for cold drawing metal wire as defined in claim 1, wherein the width of each groove between its adjacent concave surfaces is in the range of 1 to 1/3 the arcuate distance on each of said concave surfaces between adjacent of said grooves.
Claim 8
Dependent Claim
45 words
A die for cold drawing metal wire as defined in claim 2, wherein the width of each groove between its adjacent concave surfaces is in the range of 1 to 1/3 the arcuate distance on each of said concave surfaces between adjacent of said grooves.
References Cited (Backward Citations)
US2928528A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-30 | 1976-07-31 | 1977-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-30 | 1980-07-31 | 1981-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-30 | 1984-07-31 | 1985-01-30 | $7700.00 | Window Closed / Lapsed |