GB1338828A - Fire damper - Google Patents
Fire damperInfo
- Publication number
- GB1338828A GB1338828A GB1338828DA GB1338828A GB 1338828 A GB1338828 A GB 1338828A GB 1338828D A GB1338828D A GB 1338828DA GB 1338828 A GB1338828 A GB 1338828A
- Authority
- GB
- United Kingdom
- Prior art keywords
- spring
- flap
- bolt
- duct
- assembly
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C2/00—Fire prevention or containment
- A62C2/06—Physical fire-barriers
- A62C2/12—Hinged dampers
Landscapes
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Air-Flow Control Members (AREA)
Abstract
1338828 Fire dampers GREENWOOD AIRVAC VENTILATION Ltd 3 March 1972 [27 Jan 1971] 3315/71 Heading ASA [Also in Division F4] A temperature-responsive check valve mounted in an air duct 1, 2, of a heating and/or ventilating system comprises flap 7 biassed by spring 9 to a duct-closing position abutting flange 5 of sleeve 4, and normally retained in a position in which air flow is unimpeded by stop assembly 11 pivotally mounted at bolt 13 and consisting of flap-engaging part 11a and further part 11b fusibly connected thereto, e.g. by solder. In the Fig. 1 embodiment bolt 13 passes through both portions 11a, 11b, and rivet 14 restricts pivoting of 11b. On melting of the solder 11 a becomes detached from 11b and rotates about bolt 13 allowing flap 7 to close the duct. Spring clip 15 is positioned to prevent flap 7 from re-opening. Spring 9 is a constantforce flat tension spring extending from housing 10. In Fig. 3, assembly 11 is pivoted above flap 7 at bolt 13 on part 11 having angled opposite end 17. Part 11a has flap-engaging lip 12. No rivet 14 is required. The force tending to separate 11a, 11b is now a shear force instead of a pivoting one. Spring 9 is a normal tension spring. Alternatively the spring may be a compression type, e.g. a leaf spring. Access to the assembly is by cover plate 16 on duct-connecting box 3.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB331571 | 1971-01-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1338828A true GB1338828A (en) | 1973-11-28 |
Family
ID=9756007
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1338828D Expired GB1338828A (en) | 1971-01-27 | 1971-01-27 | Fire damper |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1338828A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0046481A1 (en) * | 1980-08-22 | 1982-03-03 | Schako Metallwarenfabrik Ferdinand Schad KG | Fire damper |
GB2192687A (en) * | 1986-07-17 | 1988-01-20 | Monsanto Canada Inc | Fire stop devices |
GB2255278A (en) * | 1991-03-08 | 1992-11-04 | Jackson Int Pty Ltd | Fire damper |
GB2369571A (en) * | 2000-12-01 | 2002-06-05 | Tri Air Innovations Ltd | Air flow controller and fire damper in an air flow duct |
US6991536B2 (en) | 2000-12-01 | 2006-01-31 | Kent Tooling And Components Limited | Air flow controller and fire damper in an air flow duct |
-
1971
- 1971-01-27 GB GB1338828D patent/GB1338828A/en not_active Expired
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0046481A1 (en) * | 1980-08-22 | 1982-03-03 | Schako Metallwarenfabrik Ferdinand Schad KG | Fire damper |
GB2192687A (en) * | 1986-07-17 | 1988-01-20 | Monsanto Canada Inc | Fire stop devices |
US4788800A (en) * | 1986-07-17 | 1988-12-06 | Monsanto Canada Inc. | Fire stop device |
GB2192687B (en) * | 1986-07-17 | 1991-01-02 | Monsanto Canada Inc | Improvements relating to fire stop devices |
GB2255278A (en) * | 1991-03-08 | 1992-11-04 | Jackson Int Pty Ltd | Fire damper |
GB2255278B (en) * | 1991-03-08 | 1995-06-21 | Jackson Int Pty Ltd | Fire dampers |
GB2369571A (en) * | 2000-12-01 | 2002-06-05 | Tri Air Innovations Ltd | Air flow controller and fire damper in an air flow duct |
GB2369571B (en) * | 2000-12-01 | 2005-01-26 | Tri Air Innovations Ltd | Air flow controller and fire damper in an air flow duct |
US6991536B2 (en) | 2000-12-01 | 2006-01-31 | Kent Tooling And Components Limited | Air flow controller and fire damper in an air flow duct |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PLNP | Patent lapsed through nonpayment of renewal fees |