US4544593A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealing strip
Assignee: Braas GmbH
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Filing: 1983-05-23
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Granted: 1985-10-01
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Expires: 2003-05-23
Abstract
Abstract A sealing strip is provided which is suitable for sealing flat roofs and engineering structures at outer corners. The sealing element is made of a weather-resistant elastomer or plastomer and comprises, in a zone positioned intermediate its ends, at least one pair of areas in the form of oppositely directed waves whose amplitudes and wave-lengths increase regularly from the center line of the strip towards its longitudinal edges so that said zone comprises a planar basal surface and an additional curved a planar sectorial surface corresponding to each wave. The wave-shape areas enable the sealing element to be smoothly laid around an outer corner without straining any areas of the strip.
Inventors
- 👤 Bernhard Borgert
- 👤 Udo Liche
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:03
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/62; E04B1/66; E04D; E04D13/00; E04D13/14; E04D13/1407; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24628
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
80 words
A sealing strip made of a weather-resistant elastomer or plastomer for outer corners on flat roofs and other engineering constructions, which comprises, in a zone positioned intermediate its ends, at least one pair of areas in the form of oppositely directed waves whose amplitudes and wave-lengths increase regularly from the centre line of the strip toward its longitudinally extending edges, so that said zone comprises a planar basal surface and an additional curved aplanar sectorial surface corresponding to each wave.
Claim 2
Dependent Claim
80 words
A sealing strip made of a weather-resistant elastomer or plastomer for outer corners on flat roofs and other engineering constructions, which comprises, in a zone positioned intermediate its ends, at least one pair of areas in the form of oppositely directed waves whose amplitudes and wave-lengths increase regularly from the centre line of the strip toward its longitudinally extending edges, so that said zone comprises a planar basal surface and an additional curved aplanar sectorial surface corresponding to each wave.
Claim 3
Dependent Claim
23 words
A sealing strip as claimed in claim 1, which contains one said pair of areas whose oppositely directed waves are of equal size.
Claim 4
Dependent Claim
19 words
A sealing strip as claimed in claim 2, wherein each sectorial surface corresponds to an octant of a circle.
Claim 5
Dependent Claim
16 words
A sealing strip as claimed in claim 1, which is formed of soft PVC or polyisobutylene.
Claim 6
Dependent Claim
35 words
A sealing strip as claimed in claim 4, which has a length of from 500 to 700 mm, a width of from 150 to 250 mm and a thickness of from 0.8 to 2 mm.
Claim 7
Dependent Claim
24 words
A sealing strip as claimed in claim 5, wherein said zone is located at a distance at least 100 mm from one end thereof.
Claim 8
Dependent Claim
45 words
A sealing strip as claimed in claim 1 which comprises, attached to its underside a synthetic non-woven fabric, which fabric occupies an area of the sealing strip such that edge areas of the sealing strip at least 20 mm wide remain free of said fabric.
Claim 9
Dependent Claim
77 words
A sealing strip made of soft PVC or polyisobutylene for corners of flat roofs and other engineering construction which comprises, in a zone positioned intermediate its ends, at least one pair of areas in the form of oppositely directed waves whose amplitudes and wave-lengths increase linearly from the centre line of the strip towards its longitudinally extending edges so that said zone comprises a planar basal surface and an additional aplanar sectorial surface corresponding to each wave.
Claim 10
Dependent Claim
77 words
A sealing strip made of soft PVC or polyisobutylene for corners of flat roofs and other engineering construction which comprises, in a zone positioned intermediate its ends, at least one pair of areas in the form of oppositely directed waves whose amplitudes and wave-lengths increase linearly from the centre line of the strip towards its longitudinally extending edges so that said zone comprises a planar basal surface and an additional aplanar sectorial surface corresponding to each wave.
Claim 11
Dependent Claim
33 words
A sealing strip as claimed in claim 8, which contains one said pair of areas whose oppositely directed waves are of equal size, each sectorial surface corresponding to an octant of a circle.
Claim 12
Dependent Claim
72 words
A sealing strip as claimed in claim 8, which has a length of from 500 to 700 mm, a width of from 150 to 250 mm and a thickness of from 0.8 to 2 mm and comprises, attached to its underside a synthetic non-woven fabric, which fabric occupies an area of the sealing strip such that edge areas of the sealing strip at least 20 mm wide remain free of said fabric.
Claim 13
Dependent Claim
46 words
A rectangular sealing strip of weather resistant material having at least one pair of areas in an intermediate zone defining oppositely directed waves, each said wave having an amplitude and a wave-length increasing from a center line of the strip towards a longitudinally extending edge thereof.
Claim 14
Dependent Claim
46 words
A rectangular sealing strip of weather resistant material having at least one pair of areas in an intermediate zone defining oppositely directed waves, each said wave having an amplitude and a wave-length increasing from a center line of the strip towards a longitudinally extending edge thereof.
Claim 15
Dependent Claim
14 words
A rectangular sealing strip as set forth in claim 11 made of soft PVC.
Claim 16
Dependent Claim
13 words
A rectangular sealing strip as set forth in claim 11 made of polyisobutylene.
Claim 17
Dependent Claim
13 words
A rectantular sealing strip as set forth in claim 11 made of elastomer.
Claim 18
Dependent Claim
13 words
A rectangular sealing strip as set forth in claim 11 made of plastomer.
Claim 19
Dependent Claim
20 words
A rectangular sealing strip as set forth in claim 11 having a synthetic non-woven fabric bonded on an underside thereof.
References Cited (Backward Citations)
CA736647A
Cited
US4330581A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-09-30 | 1989-04-01 | 1989-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-30 | 1993-04-01 | 1993-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-30 | 1997-04-01 | 1997-10-01 | $7700.00 | Window Closed / Lapsed |