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Patent US3131791A successfully refreshed from Google Patents.
US3131791A
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US
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Metal joist
Assignee: Davisbilt Steel Joist Inc
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Filing: 1959-05-18
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Granted: 1964-05-05
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Expires: 1979-05-18
Abstract
No abstract record available.
Inventors
- 👤 Jr Augustine Davis
- 👤 James A Nichols
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 01:59
CPC Classifications
E; E04; E04C; E04C3/00; E04C3/02; E04C3/04; E04C3/08; E04C3/09; E04C2003/0486; E04C2003/0491
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
163 words
A METAL JOIST FOR SUPPORTING A COLLATERAL MEMBER AND RECEIVING DRIVEN FRICTIONAL FASTENING MEANS PASSING THROUGH THE COLLATERAL MEMBER AND SECURING IT TO THE JOIST, COMPRISING; WEB MEANS, A CHORD JOINED TO SAID WEB MEANS ALONG ONE EDGE THEREOF, SAID CHORD INCLUDING A PAIR OF LONGITUDINALLY EXTENDING, ELONGATED SUPPORTING ELEMENTS BRACKETING SAID WEB MEANS, ONE OF SAID SUPPORTING ELEMENTS BEING HOLLOW AND GENERALLY RECTANGULAR IN CROSS-SECTIONAL CONFIGURATION, SAID ONE ELEMENT HAVING OPPOSITELY DISPOSED PARALLEL WALLS OF NAIL PENETRABLE SHEET METAL, SAID PARALLEL NAIL PENETRABLE WALLS ADAPTED TO BE PENETRATED BY THE DRIVEN FRICTIONAL FASTENING MEANS, THE OPENINGS FORMED IN THE SHEET METAL BY THE FASTENING MEANS HAVING DISTORTED MARGINS WHICH FRICTIONALLY RETAIN THE FASTENING MEANS AND CONSEQUENTLY THE COLLATERAL MEMBER SECURELY IN PLACE ON THE JOIST, THE OTHER OF SAID SUPPORTING ELEMENTS COMPRISING A GENERALLY L-SHAPED FLANGE FORMED INDEPENDENTLY OF AND SECURED TO SAID WEB MEANS, ONE OF THE LEGS OF SAID L-SHAPED FLANGE ADAPTED TO SUPPORT THE COLLATERAL MEMBER IN FLUSH RELATIONSHIP.
Claim 2
Dependent Claim
163 words
A METAL JOIST FOR SUPPORTING A COLLATERAL MEMBER AND RECEIVING DRIVEN FRICTIONAL FASTENING MEANS PASSING THROUGH THE COLLATERAL MEMBER AND SECURING IT TO THE JOIST, COMPRISING; WEB MEANS, A CHORD JOINED TO SAID WEB MEANS ALONG ONE EDGE THEREOF, SAID CHORD INCLUDING A PAIR OF LONGITUDINALLY EXTENDING, ELONGATED SUPPORTING ELEMENTS BRACKETING SAID WEB MEANS, ONE OF SAID SUPPORTING ELEMENTS BEING HOLLOW AND GENERALLY RECTANGULAR IN CROSS-SECTIONAL CONFIGURATION, SAID ONE ELEMENT HAVING OPPOSITELY DISPOSED PARALLEL WALLS OF NAIL PENETRABLE SHEET METAL, SAID PARALLEL NAIL PENETRABLE WALLS ADAPTED TO BE PENETRATED BY THE DRIVEN FRICTIONAL FASTENING MEANS, THE OPENINGS FORMED IN THE SHEET METAL BY THE FASTENING MEANS HAVING DISTORTED MARGINS WHICH FRICTIONALLY RETAIN THE FASTENING MEANS AND CONSEQUENTLY THE COLLATERAL MEMBER SECURELY IN PLACE ON THE JOIST, THE OTHER OF SAID SUPPORTING ELEMENTS COMPRISING A GENERALLY L-SHAPED FLANGE FORMED INDEPENDENTLY OF AND SECURED TO SAID WEB MEANS, ONE OF THE LEGS OF SAID L-SHAPED FLANGE ADAPTED TO SUPPORT THE COLLATERAL MEMBER IN FLUSH RELATIONSHIP.
References Cited (Backward Citations)
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Cited
US1351615A
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US1523106A
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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) | 1967-05-05 | 1967-11-04 | 1968-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-05 | 1971-11-04 | 1972-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-05 | 1975-11-04 | 1976-05-05 | $7700.00 | Window Closed / Lapsed |