FR2449242A1 - Heat activated ventilation duct flap valve - has flexible arched section which fits flush in bore chamber with heat actuated torsion closure spring - Google Patents

Heat activated ventilation duct flap valve - has flexible arched section which fits flush in bore chamber with heat actuated torsion closure spring

Info

Publication number
FR2449242A1
FR2449242A1 FR7904323A FR7904323A FR2449242A1 FR 2449242 A1 FR2449242 A1 FR 2449242A1 FR 7904323 A FR7904323 A FR 7904323A FR 7904323 A FR7904323 A FR 7904323A FR 2449242 A1 FR2449242 A1 FR 2449242A1
Authority
FR
France
Prior art keywords
flap
heat
closure
ventilation duct
flap valve
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.)
Pending
Application number
FR7904323A
Other languages
French (fr)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to FR7904323A priority Critical patent/FR2449242A1/en
Publication of FR2449242A1 publication Critical patent/FR2449242A1/en
Pending legal-status Critical Current

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

Abstract

With a fire or temperature actuated sprung closure action, the hinged (10) circular flap (5) valve is used at strategic points in ventilation ducts (11) or similar and constitutes an automatic barrier to fire or fume propagation. The flap is top hung with e.g. a torsion spring (9) for closure, with a flexible construction of an original arched half round cross-section. This pre-curvature enables the flap to be set flush in a duct length (1) of increased dia. permitting unobstructed duct flows when the flap is at repose. In detail the flap may be of metal sheet (5) with a thick thermo-insulating padding (4), the increase in duct dia. equalling padding thickness. Fusible plastic chains (8) may maintain pre-curvature and hold the flap at repose. This action is augmented by a fusible pastille (14) catch. A latch (6) may hold the flap at closure against a compressible seal.
FR7904323A 1979-02-15 1979-02-15 Heat activated ventilation duct flap valve - has flexible arched section which fits flush in bore chamber with heat actuated torsion closure spring Pending FR2449242A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7904323A FR2449242A1 (en) 1979-02-15 1979-02-15 Heat activated ventilation duct flap valve - has flexible arched section which fits flush in bore chamber with heat actuated torsion closure spring

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7904323A FR2449242A1 (en) 1979-02-15 1979-02-15 Heat activated ventilation duct flap valve - has flexible arched section which fits flush in bore chamber with heat actuated torsion closure spring

Publications (1)

Publication Number Publication Date
FR2449242A1 true FR2449242A1 (en) 1980-09-12

Family

ID=9222218

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7904323A Pending FR2449242A1 (en) 1979-02-15 1979-02-15 Heat activated ventilation duct flap valve - has flexible arched section which fits flush in bore chamber with heat actuated torsion closure spring

Country Status (1)

Country Link
FR (1) FR2449242A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999061832A1 (en) * 1998-05-22 1999-12-02 Westa Holding Gmbh & Co. Kg Method for closing off a passage through a wall or ceiling and closing element
GB2587019A (en) * 2019-09-13 2021-03-17 Intumescent Systems Ltd A ceiling unit for pipework

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2262541A1 (en) * 1972-12-21 1974-06-27 Flamex Ltd LOCKING DEVICE AGAINST FIRE AND SMOKE
FR2242999A1 (en) * 1973-09-12 1975-04-04 Futurumverken Ab
FR2315651A1 (en) * 1975-06-24 1977-01-21 Strulik Wilhelm Automatic ventilation duct blocking device - has elastically pivoted flaps held open by fusible pins and closing onto collar

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2262541A1 (en) * 1972-12-21 1974-06-27 Flamex Ltd LOCKING DEVICE AGAINST FIRE AND SMOKE
FR2242999A1 (en) * 1973-09-12 1975-04-04 Futurumverken Ab
FR2315651A1 (en) * 1975-06-24 1977-01-21 Strulik Wilhelm Automatic ventilation duct blocking device - has elastically pivoted flaps held open by fusible pins and closing onto collar

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999061832A1 (en) * 1998-05-22 1999-12-02 Westa Holding Gmbh & Co. Kg Method for closing off a passage through a wall or ceiling and closing element
GB2587019A (en) * 2019-09-13 2021-03-17 Intumescent Systems Ltd A ceiling unit for pipework
GB2587019B (en) * 2019-09-13 2021-09-15 Intumescent Systems Ltd A ceiling unit for pipework
IE20200203A3 (en) * 2019-09-13 2022-07-20 Intumescent Systems Ltd A ceiling unit for pipework

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