US4454744A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forging a bifurcated member
Assignee: DURBIN-DURCO Inc
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Filing: 1981-07-10
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Granted: 1984-06-19
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Expires: 2001-07-10
Abstract
Abstract A method of forging a bifurcated member having closely spaced parallel portions including the steps of forging the member to form diverging bifurcated portions, and coining the diverging bifurcated portions inwardly toward each other into substantially parallel relation having a narrow slot therebetween.
Inventors
- 👤 Votaw S. Durbin, III
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:21
CPC Classifications
B; B21; B21K; B21K1/00; B21K1/74; Y; Y10; Y10T; Y10T29/00; Y10T29/51; Y10T29/5116
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
100 words
A method of forging a member having closely spaced, substantially parallel bifurcated portions, comprising the steps of: (a) forging the member to form a handle with a pair of relatively thick bifurcated portions at one end having a relatively thin transverse web therebetween, the bifurcated portions and the web diverging laterally outward to a relatively wide entrance from a relatively narrow throat, (b) forging the member to punch out the transverse interconnecting web from between the bifurcated portions, and (c) coining the bifurcated portions inwardly toward each other into substantially parallel relation having a slot of substantially constant width therebetween.
Claim 2
Independent Claim
100 words
A method of forging a member having closely spaced, substantially parallel bifurcated portions, comprising the steps of: (a) forging the member to form a handle with a pair of relatively thick bifurcated portions at one end having a relatively thin transverse web therebetween, the bifurcated portions and the web diverging laterally outward to a relatively wide entrance from a relatively narrow throat, (b) forging the member to punch out the transverse interconnecting web from between the bifurcated portions, and (c) coining the bifurcated portions inwardly toward each other into substantially parallel relation having a slot of substantially constant width therebetween.
Claim 3
Dependent Claim
55 words
A method of forging a member as defined in claim 1, including the steps of: (d) forging the relatively thick diverging bifurcated portions into substantially vertical relation and forging the handle into a non-uniform shape, and (e) forging the diverging web to extend transversely of the slot between the bifurcated portions in substantially horizontal relation.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-06-19 | 1987-12-19 | 1988-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-06-19 | 1991-12-19 | 1992-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-06-19 | 1995-12-19 | 1996-06-19 | $7700.00 | Window Closed / Lapsed |