Patent ID: 8523247

Claim:
A cylinder lock comprising: a housing with an opening for receiving a lock cylinder with a radially protruding cam; a bolt pivotally moveable by means of said lock cylinder between a retracted position with respect to said housing, wherein the cylinder lock is in an unlocked state, and an extended position with respect to said housing, wherein the cylinder lock is in a locked state; a ring comprising a radial opening for engaging said radially protruding cam, so as to couple said ring and said radially protruding cam, and a toothed arc with a first end and a second end, wherein said first end is adjacent to said radial opening; a slider, coupled between said bolt and said ring and comprising a toothed rack for engagement with said toothed arc, and a recess adjacent to said toothed rack for engagement with said radially protruding cam, wherein said housing comprises at least one guide for guiding said slider between a first position holding the bolt in said retracted position and a second position holding the bolt in said extended position, said ring and said slider being arranged so that, when moving the slider from said first to said second position by rotating said ring by means of the radially protruding cam of the lock cylinder, the radially protruding cam comes to engage the recess in the slider to push said slider towards its second position after which the toothed arc comes to engage the toothed rack of the slider to continue displacing the slider towards its second position so that the radially protruding cam rotates out of engagement with the recess in the slider and vice versa when moving the slider from said second to said first position by rotating said ring by means of the radially protruding cam of the lock cylinder, the toothed arc comes to engage the toothed rack of the slider to push said slider towards its first position after which the radially protruding cam comes to engage the recess in the slider to continue displacing the slider towards its first position so that the toothed arc rotates out of engagement with the toothed rack of the slider; wherein said ring comprises a raised flank extending over a second arc of said ring next to said second end of the toothed arc; wherein said slider comprises a stop opposable to said raised flank of the ring in said second position of the slider so that the raised flank prevents the return of the slider towards said first position; and wherein said recess in the slider has a flank which is opposable to said raised flank of the ring in said first position of the slider so that the raised flank prevents the return of the slider towards the second position.