Patent US3680270A successfully refreshed from Google Patents.
US3680270A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elastic sealing strip
Assignee: Rubberfabriek Vredestein NV
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Filing: 1970-04-27
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Granted: 1972-08-01
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Expires: 1990-04-27
Abstract
Abstract A sealing strip of elastic material for tunnel and building joints and including a projecting portion compressible into the main body of the strip. The projecting portion is of a different modulus of elasticity from that of said main body.
Inventors
- 👤 Eduard H L Demunck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:00
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/62; E04B1/66; E04B1/68; E04B1/6812; E02; E02D; E02D25/00; E02D29/00; E02D29/16; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24479; Y10T428/24595
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
165 words
A solid sealing strip of elastic material, such as rubber, synthetic rubber and similar elastic material, especially for joints of tunnels, said sealing strip having two opposite sealing surfaces, the main portions of said sealing surfaces being parallel to one another, one of said opposite sides being provided with a projecting portion, having a substantially triangular cross section, the base and the sides of said projecting portion being small as compared with the width of the sealing strip, said projecting portion consisting of an elastic material having a smaller modulus of elasticity than at least a part of said sealing strip located directly below said projection, the height of the last-mentioned part and its modulus of elasticity on the one side and the dimensions and the modulus of elasticity of the projecting portion on the other side being selected in such a way as to allow the projecting portion to be substantially pressed into said part of the sealing strip located below said projecting portion.
Claim 2
Dependent Claim
165 words
A solid sealing strip of elastic material, such as rubber, synthetic rubber and similar elastic material, especially for joints of tunnels, said sealing strip having two opposite sealing surfaces, the main portions of said sealing surfaces being parallel to one another, one of said opposite sides being provided with a projecting portion, having a substantially triangular cross section, the base and the sides of said projecting portion being small as compared with the width of the sealing strip, said projecting portion consisting of an elastic material having a smaller modulus of elasticity than at least a part of said sealing strip located directly below said projection, the height of the last-mentioned part and its modulus of elasticity on the one side and the dimensions and the modulus of elasticity of the projecting portion on the other side being selected in such a way as to allow the projecting portion to be substantially pressed into said part of the sealing strip located below said projecting portion.
Claim 3
Dependent Claim
58 words
A sealing strip according to claim 1, characterized in that it consists of a plurality of prevulcanized substantially flat solid layers being connected to one another, one of the faces of each pair of two adjacent layers being provided with at least one projection gripping in a recess arranged in the other face of said pair of faces.
Claim 4
Dependent Claim
244 words
A solid sealing strip of elastic material, such as rubber, synthetic rubber and similar elastic material, especially for joints of tunnels, said sealing strip having two opposite sealing surfaces, the main portions of said sealing surfaces being parallel to one another, one of said opposite sides being provided with a projecting portion having a substantially triangular cross section, the base and the sides of said projecting portion being small as compared with the width of the sealing strip, said projecting portion consisting of an elastic material having a smaller modulus of elasticity than at least a part of said sealing strip located directly below said projection, the height of the last-mentioned part and its modulus of elasticity on the one side and the dimensions and the modulus of elasticity of the projecting portion on the other side being selected in such a way as to allow the projecting portion to be substantially pressed into said part of the sealing strip located below said projecting portion, the sealing strip comprising a plurality of layers consisting of elastic material, such as rubber, synthetic rubber and similar elastic material, having different moduli of eLasticity, a rib being provided at the side of said strip opposite to the side provided with the projection having a small triangular cross section, said rib having a substantially trapezium-shaped cross section, the sealing strip being provided with fastening flanges having their bottom flush with the sealing strip side provided with said rib.
Claim 5
Dependent Claim
244 words
A solid sealing strip of elastic material, such as rubber, synthetic rubber and similar elastic material, especially for joints of tunnels, said sealing strip having two opposite sealing surfaces, the main portions of said sealing surfaces being parallel to one another, one of said opposite sides being provided with a projecting portion having a substantially triangular cross section, the base and the sides of said projecting portion being small as compared with the width of the sealing strip, said projecting portion consisting of an elastic material having a smaller modulus of elasticity than at least a part of said sealing strip located directly below said projection, the height of the last-mentioned part and its modulus of elasticity on the one side and the dimensions and the modulus of elasticity of the projecting portion on the other side being selected in such a way as to allow the projecting portion to be substantially pressed into said part of the sealing strip located below said projecting portion, the sealing strip comprising a plurality of layers consisting of elastic material, such as rubber, synthetic rubber and similar elastic material, having different moduli of eLasticity, a rib being provided at the side of said strip opposite to the side provided with the projection having a small triangular cross section, said rib having a substantially trapezium-shaped cross section, the sealing strip being provided with fastening flanges having their bottom flush with the sealing strip side provided with said rib.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |