Patent ID: 7984928

Claim:
A safety coupling, for the releasable connection of a nozzle to a duct system, which nozzle and duct system form part of an extraction system, comprising: a first section and a second section, and a coupling member having a first coupling part, which is adapted for fitting in the nozzle, via one of said first and second sections, and a second coupling part, which is adapted for fitting in the duct system via another one of the said first and second sections, which coupling member is a pneumatic rapid-coupling member, said first and second coupling parts being adapted to be brought together for connection of the nozzle to the duct system while allowing a through passage between said first and second sections and said coupling member, and the coupling member, in the joined state of the coupling parts, being adjustable between a coupled position, in which the coupling parts are coupled together to lock the connection of the nozzle to the duct system, and a decoupled position, in which the coupling parts are separable to allow release of the nozzle from the duct system, and an actuating member, which is arranged to move the coupling member from the coupled position into the decoupled position when the coupling member is subjected to a disengagement force exceeding a predetermined limit value.