Patent US4253210A successfully refreshed from Google Patents.
US4253210A
Expired / Lapsed
US
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Metal truss structure
Assignee: Individual
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Filing: 1979-09-10
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Granted: 1981-03-03
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Expires: 1999-09-10
Abstract
Abstract A metal truss structure which is characterized by chord and web members formed of rectangular tubing and with the chords of double construction to take advantage of the weight and cost savings and high torsional strength of rectangular tubing and arranged for easy and inexpensive fabrication by avoiding precise cutting and difficult welding requirement. This metal truss structure comprises chords, each including a pair of laterally spaced-apart rectangular tubing members positioned flat against opposite sides of the rectangular tubing web members at one corresponding end and welded exclusively by weld lines extending along the longitudinal intersections of the chord members with the web members for simple and automatic welding.
Inventors
- 👤 Andre Racicot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:19
CPC Classifications
E; E04; E04C; E04C3/00; E04C3/38; E04C3/40; E04C3/02; E04C3/04; E04C3/08; E04C2003/0486; E04C2003/0491
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
163 words
A lattice girder comprising two spaced elongated chords, each including a pair of laterally spaced-apart, parallel, rectangular tubing chord members and web members rigidly interconnecting said chords, and serially spaced apart from one another along said chords, each web member consisting of a straight rectangular tubing web member, of uniform cross-section throughout its length and having its end portions extending between and applied flat against opposite inner faces of the rectangular tubing chord members, both ends of each rectangular tubing web member being cut so as to extend substantially parallel to the rectangular tubing chord members, and weld lines securing said end portions of said web members to each of said rectangular tubing chord members, said weld lines extending at the inner and outer sides, respectively, of said chord members along all the longitudinal extensions between said rectangular tubing chord members and said web members, said weld lines extending longitudinally of said chords and at two spaced zones longitudinally of each web member.
Claim 2
Dependent Claim
163 words
A lattice girder comprising two spaced elongated chords, each including a pair of laterally spaced-apart, parallel, rectangular tubing chord members and web members rigidly interconnecting said chords, and serially spaced apart from one another along said chords, each web member consisting of a straight rectangular tubing web member, of uniform cross-section throughout its length and having its end portions extending between and applied flat against opposite inner faces of the rectangular tubing chord members, both ends of each rectangular tubing web member being cut so as to extend substantially parallel to the rectangular tubing chord members, and weld lines securing said end portions of said web members to each of said rectangular tubing chord members, said weld lines extending at the inner and outer sides, respectively, of said chord members along all the longitudinal extensions between said rectangular tubing chord members and said web members, said weld lines extending longitudinally of said chords and at two spaced zones longitudinally of each web member.
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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) | 1984-03-02 | 1984-09-01 | 1985-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-02 | 1988-09-01 | 1989-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-02 | 1992-09-01 | 1993-03-03 | $7700.00 | Window Closed / Lapsed |