(19)
(11) EP 0 919 778 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
11.09.2002 Bulletin 2002/37

(43) Date of publication A2:
02.06.1999 Bulletin 1999/22

(21) Application number: 98309332.9

(22) Date of filing: 13.11.1998
(51) International Patent Classification (IPC)7: F24F 7/02
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 27.11.1997 GB 9725131

(71) Applicant: COLT INTERNATIONAL LICENSING LIMITED
Hampshire PO9 2LY (GB)

(72) Inventors:
  • Wilson, Colin Richard
    Schenecteady, NY 12305 (US)
  • Holden-Brown, Nicholas Simon
    Hampshire, S050 5PS (GB)
  • Marshall, Frank Graham
    Fordingbridge, Hampshire SP6 2LJ (GB)

(74) Representative: Greenwood, John David et al
Graham Watt & Co. St. Botolph's House 7-9 St. Botolph's Road
Sevenoaks Kent TN13 3AJ
Sevenoaks Kent TN13 3AJ (GB)

   


(54) Balanced vent


(57) A vent comprises a duct (16) defining a vent passageway having a vent passageway exit and a vent cover (24) movable between a first aperture position and a second aperture position in which the vent passageway exit is fully covered and is not fully covered, respectively. There is an aperture (140) in a duct side wall which is closed when the vent covers (24) is in the first operative position and open to allow air to pass to or from the vent passageway through the aperture when the vent cover (24) is in a third operative position in which the vent passageway exit is also fully covered. The vent cover (24) may be a second vent cover, which are interlinked so as to be constrained to move together, either towards each other to cover the vent passageway exit or away from each other to uncover the vent passageway exit. In this latter embodiment the operative is optional.






Search report