US4250218A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Floor covering
Assignee: Design Programmes SA
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Filing: 1979-07-25
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Granted: 1981-02-10
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Expires: 1999-07-25
Abstract
Abstract The invention relates to a floor covering produced in sheets of relatively resilient material and provided on its lower face with hollow cells confining pockets of air on the floor. The upper face may be provided with bulges corresponding to said hollow cells. These arrangements increase the suppleness, the reliability, and the comfort.
Inventors
- 👤 Roger Tallon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:43
CPC Classifications
D; D06; D06N; D06N7/00; D06N7/0005; D06N7/0007; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24479; Y10T428/24562; Y10T428/24612; Y10T428/24628; Y10T428/24661; Y10T428/24942; Y10T428/2495; Y10T428/26
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
187 words
A tile floor covering comprising a sheet of hard resilient material having a Shore hardness within the range of 75 to 95, said sheet including upper and lower faces with said lower face being adapted to rest on a floor to be covered and said upper face acting as an exposed wear surface, and a plurality of hollow cells formed in said sheet, each of which opens at a respective base thereof on the lower face of said sheet with said base including the greatest dimension of the respective cell, said hollow cells being regularly spaced and separated from one another by planar portions of the sheet, wherein the ratio of the total surface area of such planar portions at the lower face to the total area of the bases of said hollow cells on the lower face of the sheet is between 0.5 and 5, said sheet further having a substantially uniform thickness throughout said hollow cells and planar portions, wherein the ratio of the thickness of the sheet to said greatest dimension of the hollow cells at the bases thereof is between 0.1 and 0.2.
Claim 2
Dependent Claim
187 words
A tile floor covering comprising a sheet of hard resilient material having a Shore hardness within the range of 75 to 95, said sheet including upper and lower faces with said lower face being adapted to rest on a floor to be covered and said upper face acting as an exposed wear surface, and a plurality of hollow cells formed in said sheet, each of which opens at a respective base thereof on the lower face of said sheet with said base including the greatest dimension of the respective cell, said hollow cells being regularly spaced and separated from one another by planar portions of the sheet, wherein the ratio of the total surface area of such planar portions at the lower face to the total area of the bases of said hollow cells on the lower face of the sheet is between 0.5 and 5, said sheet further having a substantially uniform thickness throughout said hollow cells and planar portions, wherein the ratio of the thickness of the sheet to said greatest dimension of the hollow cells at the bases thereof is between 0.1 and 0.2.
Claim 3
Dependent Claim
31 words
A covering as defined in claim 1 including a flat sheet secured to said lower face of said sheet of resilient material for closing said cells and forming air pockets therein.
Claim 4
Dependent Claim
21 words
A covering as defined in claim 2 wherein said hollow cells form raised designs on said upper face of the sheet.
Claim 5
Dependent Claim
34 words
A covering as defined in claim 3 wherein the maximum height of said raised designs above the planar portions of the sheet between the cells is approximately equal to the thicknes of the sheet.
Claim 6
Dependent Claim
20 words
A floor covering as defined in claim 1 wherein said sheet has a thickness of between 2 and 4 millimeters.
Claim 7
Dependent Claim
31 words
A floor covering as defined in claim 1 wherein said hollow cells project above the flat upper surface portions of said sheet by a distance of between 0.5 and 2 millimeters.
Claim 8
Dependent Claim
25 words
A floor covering as defined in claim 1 wherein the minimum distance between adjacent peripheries of said hollow cells is between 2 and 10 millimeters.
Claim 9
Dependent Claim
223 words
A tile floor covering comprising a sheet of hard resilient material having a thickness in the range of 2 to 4 millimeters and a Shore hardness in the range of 75 to 95, said sheet including upper and lower surfaces with said lower surface being adapted to rest on a floor to be covered and said upper surface acting as an exposed wear surface and having a flat portion, and a plurality of hollow cells formed in said sheet, each of which opens at the lower surface of said sheet at a respective base thereof and projecting above the flat portion of the upper surface of said sheet by a distance in the range of 0.5 to 2 millimeters, said hollow cells being regularly spaced and separated from one another by planar portions of the sheet, wherein the ratio of the total surface area of said planar portions at the lower surface of the sheet to the total area of the bases of the hollow cells on the lower surface of the sheet is within the range of 0.5 and 5, said sheet further having a substantially uniform thickness throughout said hollow cells and planar portions, wherein the ratio of the thickness of the sheet to the diameter of the bases of the hollow cells is within the range of 0.1 to 0.2.
Claim 10
Dependent Claim
223 words
A tile floor covering comprising a sheet of hard resilient material having a thickness in the range of 2 to 4 millimeters and a Shore hardness in the range of 75 to 95, said sheet including upper and lower surfaces with said lower surface being adapted to rest on a floor to be covered and said upper surface acting as an exposed wear surface and having a flat portion, and a plurality of hollow cells formed in said sheet, each of which opens at the lower surface of said sheet at a respective base thereof and projecting above the flat portion of the upper surface of said sheet by a distance in the range of 0.5 to 2 millimeters, said hollow cells being regularly spaced and separated from one another by planar portions of the sheet, wherein the ratio of the total surface area of said planar portions at the lower surface of the sheet to the total area of the bases of the hollow cells on the lower surface of the sheet is within the range of 0.5 and 5, said sheet further having a substantially uniform thickness throughout said hollow cells and planar portions, wherein the ratio of the thickness of the sheet to the diameter of the bases of the hollow cells is within the range of 0.1 to 0.2.
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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) | 1984-02-10 | 1984-08-11 | 1985-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-10 | 1988-08-11 | 1989-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-10 | 1992-08-11 | 1993-02-10 | $7700.00 | Window Closed / Lapsed |