US3851378A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of constructing cable tray
Assignee: Renn-Cupit Industries Ltd
•
Filing: 1972-11-02
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Granted: 1974-12-03
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Expires: 1992-11-02
Abstract
Abstract The disclosure relates to cable trays of the type where a pair of parallel side rails are joined in ladder-like fashion by a plurality of rung-like cross-members. The method of making the cable tray according to the present disclosure includes passing the cross-members through opposed holes provided in the side rails and cold forming positions of the cross-members to provide a pair of spaced peripheral flanges towards each end thereof in clamping engagement with opposite faces of each side rail.
Inventors
- 👤 J Dessert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:16
CPC Classifications
B; B21; B21D; B21D39/00; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49908; Y10T29/49938; Y10T29/4994
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
103 words
A method of making a cable tray by assembling a plurality of cross members, having non-circular cross-section and being of hollow construction at their end portions, transversely between spaced longitudinally extending side rails provided with a plurality of aligned longitudinally spaced openings, said method including passing said cross members through opposed aligned openings in said side rails, inserting a cold forming tool into each of said hollow end portions of each of said cross members and rotating said tool whereby two spaced, peripheral flanges are simultaneously formed at each end portion in clamping arrangement with and on opposed faces of said side rails.
Claim 2
Independent Claim
103 words
A method of making a cable tray by assembling a plurality of cross members, having non-circular cross-section and being of hollow construction at their end portions, transversely between spaced longitudinally extending side rails provided with a plurality of aligned longitudinally spaced openings, said method including passing said cross members through opposed aligned openings in said side rails, inserting a cold forming tool into each of said hollow end portions of each of said cross members and rotating said tool whereby two spaced, peripheral flanges are simultaneously formed at each end portion in clamping arrangement with and on opposed faces of said side rails.
Claim 3
Dependent Claim
39 words
The method of claim 1 wherein said side rails are formed of substantially ''''J'''' section and comprise an upper flange provided with bulbous protrusions at edges thereof, a downwardly extending central web, and a lower horizontally extending half flange.
Claim 4
Dependent Claim
31 words
The method of claim 2 wherein said openings are provided in said central web adjacent said half flange sections, said openings being substantially identical in shape to a said cross member.
Claim 5
Dependent Claim
39 words
The method of claim 3 wherein said side rails are spaced parallel to one another in baCk-to-back relation such that when said cross members are positioned in said openings, said half flange sections extend outwardly of the assembled structure.
Claim 6
Dependent Claim
50 words
The method of claim 1 wherein said cross members are extruded hollow structures having horizontal upper and lower wall sections and vertical wall sections interconnecting said upper and lower sections, said wall sections being provided on their outer faces with hanger bracket receiving channels which extend longitudinally of said members.
Claim 7
Independent Claim
118 words
A method of making a cable tray by assembling a plurality of cross members, having non-circular cross-section and being of hollow construction at their end portions, transversely between spaced curved extending side rails, said side rails being provided with a plurality of spaced openings, aligned to the center of curvature of the curved extending side rails, said method including passing said cross members through the aligned and opposed openings in said curved side rails, inserting a cold forming tool into each said hollow end portion of each said cross member, and rotating said tool whereby two spaced, peripheral flanges are simultaneously formed at each end portion in clamping engagement with and on opposed faces of said side rail.
Claim 8
Independent Claim
118 words
A method of making a cable tray by assembling a plurality of cross members, having non-circular cross-section and being of hollow construction at their end portions, transversely between spaced curved extending side rails, said side rails being provided with a plurality of spaced openings, aligned to the center of curvature of the curved extending side rails, said method including passing said cross members through the aligned and opposed openings in said curved side rails, inserting a cold forming tool into each said hollow end portion of each said cross member, and rotating said tool whereby two spaced, peripheral flanges are simultaneously formed at each end portion in clamping engagement with and on opposed faces of said side rail.
References Cited (Backward Citations)
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US3119435A
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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) | 1977-12-02 | 1978-06-03 | 1978-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-02 | 1982-06-03 | 1982-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-02 | 1986-06-03 | 1986-12-03 | $7700.00 | Window Closed / Lapsed |