US3427699A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Open web steel joist production line
Assignee: Dominion Bridge Co Ltd
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Filing: 1966-09-29
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Granted: 1969-02-18
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Expires: 1986-09-29
Abstract
No abstract record available.
Inventors
- 👤 Richard Allan Gordon Cape
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:49
CPC Classifications
B; B23; B23K; B23K11/00; B23K11/002; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49616; Y10T29/49623; Y10T29/49625; Y10T29/49826; Y10T29/49828; Y10T29/49829; Y10T29/51; Y10T29/5136; Y10T29/5137
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
A METHOD FOR THE CONTINUOUS FABRICATION OF INDIVIDUAL METAL JOISTS COMPRISING SUCCESSIVELY FEEDING WEB MEMBERS OF PREDETERMINED LENGTH TO AN ASEMBLY STATION, WHERE THE WEB MEMBER FOR EACH JOIST IS BROUGHT INTO CONTACT ASSEMBLY WITH TOP AND BOTTOM CHORD MEMBERS OF PREDETERMINED LENGTH GREATER THAN THE LENGTH OF THE WEB MEMBER AND IN SUCH MANNER THAT THE ENDS OF THE CHORD MEMBERS EXTEND BEYOND THE ENDS OF THE WEB MEMBER, PASSING THE CONTACTING ASSEMBLED WEB AND CHORD MEMBERS OF EACH JOIST TO A WELDING STATION AND THERE JOINING SAID MEMBERS BY WELDING AT THE CONTACTING SURFACES THEREOF, PASSING THE WELDED WEB AND CHORD MEMBERS OF EACH JOIST TO A CHORD BENDING AND WELDING STATION WHERE THE EXTENDED ENDS OF ONE CHORD MEMBER ARE BENT INTO CONTACT WITH AND WELDED TO THE EXTENDED ENDS OF THE OTHER CHORD MEMBER.
Claim 2
Independent Claim
138 words
A METHOD FOR THE CONTINUOUS FABRICATION OF INDIVIDUAL METAL JOISTS COMPRISING SUCCESSIVELY FEEDING WEB MEMBERS OF PREDETERMINED LENGTH TO AN ASEMBLY STATION, WHERE THE WEB MEMBER FOR EACH JOIST IS BROUGHT INTO CONTACT ASSEMBLY WITH TOP AND BOTTOM CHORD MEMBERS OF PREDETERMINED LENGTH GREATER THAN THE LENGTH OF THE WEB MEMBER AND IN SUCH MANNER THAT THE ENDS OF THE CHORD MEMBERS EXTEND BEYOND THE ENDS OF THE WEB MEMBER, PASSING THE CONTACTING ASSEMBLED WEB AND CHORD MEMBERS OF EACH JOIST TO A WELDING STATION AND THERE JOINING SAID MEMBERS BY WELDING AT THE CONTACTING SURFACES THEREOF, PASSING THE WELDED WEB AND CHORD MEMBERS OF EACH JOIST TO A CHORD BENDING AND WELDING STATION WHERE THE EXTENDED ENDS OF ONE CHORD MEMBER ARE BENT INTO CONTACT WITH AND WELDED TO THE EXTENDED ENDS OF THE OTHER CHORD 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) | 1972-02-18 | 1972-08-19 | 1973-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-18 | 1976-08-19 | 1977-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-18 | 1980-08-19 | 1981-02-18 | $7700.00 | Window Closed / Lapsed |