Patent US4304080A successfully refreshed from Google Patents.
US4304080A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Construction beam
Assignee: ThyssenKrupp Budd Co
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Filing: 1980-01-28
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Granted: 1981-12-08
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Expires: 2000-01-28
Abstract
Abstract A construction beam includes solid strips of material forming inner and outer skins. Foam plastic material is disposed between the solid strips. Means are provided along the top and bottom of the strips to interlock one beam with a next adjacent beam to form a structure. Means for locking the strips to the foam plastic material may be provided.
Inventors
- 👤 Richard B. Freeman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:01
CPC Classifications
E; E04; E04C; E04C3/00; E04C3/02; E04C3/29
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
149 words
A beam for use in a structure of a building comprising: a. a first elongated strip forming an outer skin for said beam; b. a second elongated strip spaced from said first elongated strip forming an inner skin for said beam; c. plastic foam material disposed in substantially the entire space between said first and second elongated strips to form top and bottom edges for said beam; d. interlocking means forming part of said top and bottom edges to permit interlocking of the top edge of one beam to the bottom edge of an adjacent beam to form said structure; and e. said first and second elongated strips each include a plurality of angular projecting portions extending inwardly from the inner surfaces of said elongated strips into said plastic material along the entire length of said strips to mechanically lock said first and second strip to said plastic material.
Claim 2
Dependent Claim
149 words
A beam for use in a structure of a building comprising: a. a first elongated strip forming an outer skin for said beam; b. a second elongated strip spaced from said first elongated strip forming an inner skin for said beam; c. plastic foam material disposed in substantially the entire space between said first and second elongated strips to form top and bottom edges for said beam; d. interlocking means forming part of said top and bottom edges to permit interlocking of the top edge of one beam to the bottom edge of an adjacent beam to form said structure; and e. said first and second elongated strips each include a plurality of angular projecting portions extending inwardly from the inner surfaces of said elongated strips into said plastic material along the entire length of said strips to mechanically lock said first and second strip to said plastic material.
Claim 3
Dependent Claim
17 words
A beam as set forth in claim 1 wherein said first and second elongated strips comprise metal.
Claim 4
Dependent Claim
28 words
A beam as set forth in claim 1 wherein said first and second strips comprise plastic extrusions, and said plastic material comprises a relatively low density plastic foam.
Claim 5
Dependent Claim
132 words
A beam for use in a structure of a building comprising: a. a first elongated metal strip forming an outer skin for said beam; b. a second elongated metal strip spaced from said first elongated strip forming an inner skin for said beam; c. plastic foam material disposed in substantially the entire space between said first and second elongated strips to form top and bottom edges for said beam; d. interlocking means forming part of said top and bottom edges to permit interlocking of the top edge of one beam to the bottom edge of an adjacent beam to form said structure; and e. a vinyl cover secured to said first elongated strip, said cover extending angularly away from said first strip to provide a space therebetween filled with said plastic material.
Claim 6
Dependent Claim
132 words
A beam for use in a structure of a building comprising: a. a first elongated metal strip forming an outer skin for said beam; b. a second elongated metal strip spaced from said first elongated strip forming an inner skin for said beam; c. plastic foam material disposed in substantially the entire space between said first and second elongated strips to form top and bottom edges for said beam; d. interlocking means forming part of said top and bottom edges to permit interlocking of the top edge of one beam to the bottom edge of an adjacent beam to form said structure; and e. a vinyl cover secured to said first elongated strip, said cover extending angularly away from said first strip to provide a space therebetween filled with said plastic material.
Claim 7
Dependent Claim
21 words
A beam as set forth in claim 4 wherein said first strip includes perforations therein to receive said plastic material therethrough.
Claim 8
Dependent Claim
36 words
A beam as set forth in claim 5 wherein said vinyl cover includes projections extending inwardly in the area between said first strip and said vinyl cover to lock said vinyl cover to said plastic material.
Claim 9
Dependent Claim
21 words
A beam as set forth in claim 6 wherein said plastic material comprises rigid polyurethane foam providing insulation in said beam.
References Cited (Backward Citations)
US2021341A
Cited
NL6805282A
Cited
US3643394A
Cited
US3760548A
Cited
US3834101A
Cited
DE2445180A1
Cited
US4034528A
Cited
GB1567161A
Cited
US4126977A
Cited
US4183393A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-12-07 | 1985-06-08 | 1985-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-12-07 | 1989-06-08 | 1989-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-12-07 | 1993-06-08 | 1993-12-08 | $7700.00 | Window Closed / Lapsed |