Patent ID: 8910345

Claim:
A door closer configured to be fitted to a door or door frame, the door closer comprising a housing and a spindle disposed in and extending from the housing to enable connection between the door and the door frame, the spindle being disposed for rotation about an axis relative to the housing as the door moves between open and closed positions, at least one first magnet means coupled to the spindle by a piston and cam arrangement, the piston being reciprocally disposed in the housing and the cam being positioned between the piston and the spindle, at least one second magnetic means connected to the housing, the at least one first and second magnetic means arranged in the housing with their opposite poles facing one another such that there is a magnetic force of attraction between them, whereby relative movement of the housing and the spindle effects relative movement of the at least one first and second magnetic means between proximal and distal positions, the at least one first and second magnetic means being biased to the proximal position by the magnetic force of attraction, at least one of the first and second magnetic means being a permanent magnet.