Patent US4045930A successfully refreshed from Google Patents.
US4045930A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fire resistant seals
Assignee: Dixon International Ltd
•
Filing: 1976-11-24
•
Granted: 1977-09-06
•
Expires: 1996-11-24
Abstract
Abstract A fire-resistant seal for gaps between a door or window and adjacent structure, comprises a tubular holder which contains a fire-resistant barrier material and has a lengthwise opening through which the material can exude when the holder is subjected to hot smoke or fire. To protect the material against a tamperer who inserts a probe into the opening, a baffle surface, which is coextensive with the opening, is provided inside the holder. The baffle surface forms with adjacent surfaces of the holder a strait which extends between the opening and the interior of the holder where the material is retained. The holder may also support an elastomeric draught excluder.
Inventors
- 👤 Bernard Dixon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:30
CPC Classifications
E; E06; E06B; E06B5/00; E06B5/10; E06B5/16; E06B5/164; Y; Y10; Y10S; Y10S277/00; Y10S277/931; Y10S277/933
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
92 words
A fire-resistant seal for application to a structure, comprising a holder of substantially tubular form for securing to the structure, the holder having an external elongate opening extending therealong, a chamber defined by the interior of the holder, a fire-resistant barrier material which swells under fire-conditions, retained in said chamber in the holder, and a baffle surface extending within the holder and forming with the holder interior adjacent to the baffle surface a strait which extends between the opening and the chamber, the strait being co-extensive with the length of the opening.
Claim 2
Dependent Claim
92 words
A fire-resistant seal for application to a structure, comprising a holder of substantially tubular form for securing to the structure, the holder having an external elongate opening extending therealong, a chamber defined by the interior of the holder, a fire-resistant barrier material which swells under fire-conditions, retained in said chamber in the holder, and a baffle surface extending within the holder and forming with the holder interior adjacent to the baffle surface a strait which extends between the opening and the chamber, the strait being co-extensive with the length of the opening.
Claim 3
Dependent Claim
20 words
A fire-resistant seal according to claim 1, in which the strait changes direction between the external opening and the chamber.
Claim 4
Dependent Claim
21 words
A fire-resistant seal according to claim 2, in which the baffle surface is provided by a projection on the holder interior.
Claim 5
Dependent Claim
26 words
A fire-resistant seal according to claim 3, in which the projection intervenes between the opening and an interior surface of the holder disposed opposite the opening.
Claim 6
Dependent Claim
38 words
A fire-resistant seal according to claim 4, in which the projection has a free end portion directed towards the opening and thereby constricts the width of the strait, the projection changing direction abruptly at the free end portion.
Claim 7
Dependent Claim
34 words
A fire-resistant seal according to claim 1 in which the holder is formed with a groove extending alongside the opening, and an elastomeric draught excluding member is retained in and protrudes from the groove.
Claim 8
Dependent Claim
18 words
A fire-resistant seal according to claim 1, in which the holder is an extrusion of good thermal conductivity.
Claim 9
Dependent Claim
26 words
A fire-resistant seal according to claim 1 in which the holder is an extrusion of thermoplastics, which holder is self-supporting up to at least 100° C.
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) | 1980-09-05 | 1981-03-07 | 1981-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-05 | 1985-03-07 | 1985-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-05 | 1989-03-07 | 1989-09-06 | $7700.00 | Window Closed / Lapsed |