Patent US3636690A successfully refreshed from Google Patents.
US3636690A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of bending structural members and tool therefor
Assignee: Individual
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Filing: 1968-12-23
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Granted: 1972-01-25
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Expires: 1988-12-23
Abstract
Abstract Structural members such an angle iron or channel members are bent to a desired radius by crimping the flange or flanges thereof to provide V-shaped pockets or crimps therein. The crimping tool includes a crimping jaw which, before crimping, locates the tool against the leg of the angle or channel member but which swings slightly away from it during crimping movement effected on the intersected flange so as to avoid tearing or shearing the flange while still locating the crimp very close to the leg. An improved form of angle or channel member is provided with openings along the intersection of the leg and flange to allow accurate positioning of the crimp and to further militate against tearing or shearing of the flange.
Inventors
- 👤 James C White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:01
CPC Classifications
B; B21; B21D; B21D11/00; B21D11/08; B21D7/00; E; E04; E04B; E04B9/00; E04B9/06; E04B9/061
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
176 words
A structural member comprising a pair of angularly disposed flanges having a common edge, there being provided a plurality of spaced openings at the corner formed by said common edge, each of said openings being disposed angularly with respect to both of said flanges, one of said flanges being provided with a row of longitudinally spaced openings, said row being spaced transversely from said corner, and the openings of said row being so arranged that each of them is longitudinally opposite and transversely spaced from an opening in said corner, and wherein one of said flanges is provided with spaced crimps, each of said crimps being transversely aligned opposite and adjacent an opening in said corner, said crimps being wedge-shaped with their apices lying adjacent said corner, and being disposed transversely of said flange and increasing in depth progressively outwardly from said apices, and said crimps being so spaced that the apex of each of them lies opposite and adjacent an opening in said corner and each crimp contains one of the openings in said flange.
Claim 2
Dependent Claim
176 words
A structural member comprising a pair of angularly disposed flanges having a common edge, there being provided a plurality of spaced openings at the corner formed by said common edge, each of said openings being disposed angularly with respect to both of said flanges, one of said flanges being provided with a row of longitudinally spaced openings, said row being spaced transversely from said corner, and the openings of said row being so arranged that each of them is longitudinally opposite and transversely spaced from an opening in said corner, and wherein one of said flanges is provided with spaced crimps, each of said crimps being transversely aligned opposite and adjacent an opening in said corner, said crimps being wedge-shaped with their apices lying adjacent said corner, and being disposed transversely of said flange and increasing in depth progressively outwardly from said apices, and said crimps being so spaced that the apex of each of them lies opposite and adjacent an opening in said corner and each crimp contains one of the openings in said flange.
Claim 3
Dependent Claim
23 words
A structural member as in claim 1 wherein said crimps extend to the outer edge of the flange in which they are located.
Claim 4
Dependent Claim
24 words
A structural member as in claim 1, said member being of arcuate shape with said crimps lying on the concave side of the arc.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-24 | 1975-07-26 | 1976-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-24 | 1979-07-26 | 1980-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-24 | 1983-07-26 | 1984-01-25 | $7700.00 | Window Closed / Lapsed |