US4281497A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compound beam
Assignee: VTT Technical Research Centre of Finland
•
Filing: 1979-05-23
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Granted: 1981-08-04
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Expires: 1999-05-23
Abstract
Abstract A compound beam, column or rod, consisting of a web (31) of timber or a wood-based board material or plastic material and of one or several flanges formed of sheet metal and affixed to the margin and bent around the web. The flange (32) has been affixed to the web by teeth or equivalent extending substantially through the web, and possibly using glue as aid. The teeth (33,34) bend when striking against the opposite flange metal sheet, producing a permanent joint. The teeth may also be affixed to the opposite flange by welding. A stress may be produced in the flange before it is joined to the web.
Inventors
- 👤 Pekka Luotonen
- 👤 Yrjo Tolonen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:17
CPC Classifications
E; E04; E04C; E04C3/00; E04C3/02; E04C3/29; E04C3/292
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
149 words
A compound beam comprising an elongated non-metallic web member having oppositely disposed side surfaces and an end surface, a substantially U-shaped metallic flange member having leg portions abutting against a part of said oppositely disposed side surfaces of said web member and an end portion connecting said leg portions abutting against said end surface of said web member, each of said leg portions having a tooth portion formed as an integral part thereof extending transversely of said leg portions and penetrating through a substantial portion of the thickness of said web member toward the oppositely disposed leg portion to fixedly attach said flange member and said web member, each tooth portion having a length dimension greater than the distance between the opposite side surfaces of said web member and each of said tooth portions having a tip clinched back toward the respective leg portion to which it is attached.
Claim 2
Dependent Claim
149 words
A compound beam comprising an elongated non-metallic web member having oppositely disposed side surfaces and an end surface, a substantially U-shaped metallic flange member having leg portions abutting against a part of said oppositely disposed side surfaces of said web member and an end portion connecting said leg portions abutting against said end surface of said web member, each of said leg portions having a tooth portion formed as an integral part thereof extending transversely of said leg portions and penetrating through a substantial portion of the thickness of said web member toward the oppositely disposed leg portion to fixedly attach said flange member and said web member, each tooth portion having a length dimension greater than the distance between the opposite side surfaces of said web member and each of said tooth portions having a tip clinched back toward the respective leg portion to which it is attached.
Claim 3
Dependent Claim
41 words
A compound beam according to claim 1, wherein each of said tooth portions is dimensioned to traverse the thickness of said web member and contacts said leg portion of said flange member adjoining the opposite side surface of said web member.
Claim 4
Dependent Claim
44 words
A compound beam according to claim 1, wherein each of said tooth portions is dimensioned to traverse the thickness of said web member and is fixedly secured to said leg portion of said flange member adjoining the opposite side surface of said web member.
Claim 5
Dependent Claim
18 words
A compound beam according to claim 3, wherein each of said tooth portions includes an arcuate shaped portion.
Claim 6
Dependent Claim
14 words
A compound beam according to claim 4, wherein said non-metallic web member comprises plywood.
Claim 7
Dependent Claim
37 words
A compound beam according to claim 1, wherein each of said tooth portions has an arcuate shaped tip portion extending generally opposite to said arcuate tip portion of said other tooth portion of said opposite leg portion.
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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) | 1984-08-03 | 1985-02-02 | 1985-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-03 | 1989-02-02 | 1989-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-03 | 1993-02-02 | 1993-08-04 | $7700.00 | Window Closed / Lapsed |