Patent ID: 7168276
Filing Date: 2007-01-30
Classification: E05B,Y10T

Abstract:
1. An electric lock with multiple-function spring, comprising: a fixed body; a first internal-handle actuation element comprising a rotatable sleeve; an electromechanical device; a second external-handle actuation element comprising a protruding stem; a rotating plate; and a rotatable contrast plate; wherein said rotating and contrast plates rest freely on said sleeve, said rotating plate, said contrast plate and said sleeve being provided with respective notches; and wherein said electromechanical device is constituted by an electric motor that has a shaft, a worm screw fitted on said shaft, a spring with opposite end arms and a central portion, and a slidably movable slider which is coupled to said worm screw by way of said spring in which a first one of the end arms is fixed on the fixed body of the lock, the central portion of said spring is engaged on said slider such that said central portion of said spring moves together with said slider, and a second one of said end arms is accommodated between two successive crests of said worm screw, said slider having a head and being provided, on said head, with a coupling means that is adapted to enter said notches when the slider is arranged in a forward position for rigidly coupling to each other said rotating plate, said contrast plate and said sleeve.