US4441292A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Floor
Assignee: Profoment Utvecklings AB
•
Filing: 1980-02-27
•
Granted: 1984-04-10
•
Expires: 2000-02-27
Abstract
Abstract A floor is disclosed comprising joists partially embedded in a slab. The joists are composed of a web and two flanges, the web having a lattice structure and the slab consisting of a cast, light material.
Inventors
- 👤 Axel B. R. Ericsson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:31
CPC Classifications
E; E04; E04B; E04B5/00; E04B5/02; E04B5/026; E04B5/10
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
78 words
Floor component comprising joists and slabs arranged between the joists, each of the joists includes a web arranged between two flanges for supporting a load perpendicular to the flanges, the web having a lattice structure, the slabs being the sole interconnection between the joists, said slabs being self-supporting and consisting of a cast, light cellular foamed plastic material, a top surface of the slabs being lower than a top surface of the joists and extending through the lattice.
Claim 2
Dependent Claim
78 words
Floor component comprising joists and slabs arranged between the joists, each of the joists includes a web arranged between two flanges for supporting a load perpendicular to the flanges, the web having a lattice structure, the slabs being the sole interconnection between the joists, said slabs being self-supporting and consisting of a cast, light cellular foamed plastic material, a top surface of the slabs being lower than a top surface of the joists and extending through the lattice.
Claim 3
Dependent Claim
23 words
Floor as defined in claim 1, wherein a bottom side of the slabs is substantially level with the bottom side of the joists.
Claim 4
Dependent Claim
17 words
Floor as defined in claim 1, wherein the web is a metal rod bent to zigzag form.
Claim 5
Dependent Claim
25 words
Floor as defined in claim 3, wherein the flanges are of wood and have recesses in which the bent portions of the web are inserted.
Claim 6
Dependent Claim
26 words
Floor as defined in claim 3 or 4, wherein each of the bent portions of the web is attached to one of the flanges by glue.
Claim 7
Dependent Claim
11 words
Floor as defined in claim 5, wherein the glue is polyurethane.
Claim 8
Dependent Claim
24 words
Floor as defined in claim 1, wherein the floor is assembled from prefabricated units, each consisting of at least one joist and adjoining slabs.
Claim 9
Dependent Claim
23 words
Floor as defined in claim 1, wherein the slabs are made of a material that adheres with a glueing effect to the joists.
Claim 10
Dependent Claim
24 words
Floor as defined in claim 1, wherein the slabs adhere to the joists such that the slabs and the joists form a rigid unit.
Claim 11
Dependent Claim
12 words
Floor as defined in claim 1, wherein the cellular plastic is polyurethane.
References Cited (Backward Citations)
FR1337792A
Cited
US3305991A
Cited
DE1609571A1
Cited
DE2138074A1
Cited
US3885369A
Cited
US4159606A
Cited
FR2373651A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-04-10 | 1987-10-10 | 1988-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-10 | 1991-10-10 | 1992-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-10 | 1995-10-10 | 1996-04-10 | $7700.00 | Window Closed / Lapsed |