Patent ID: 8001818
Filing Date: 2011-08-23
Classification: E05B,Y10T

Abstract:
1. A clutch mechanism for coupling with a door lock mounted in a casing superimposed on a door, the door lock having a locking bolt operated by an outside handle and an inside handle, said clutch mechanism comprising: an interior body having an arched guide; a worm screw disposed in said interior body; a first clutch element disposed in said interior body and having a first square-section spike configured to connect to the outside handle, a head or disk fitted with an eccentric, axial tab, and a prismatic projection diametrically opposite said eccentric, axial tab, said eccentric, axial tab being configured to turn with said first square-section spike and said projection having an orifice; a second clutch element disposed in said interior body and having a slot and a second square-section spike configured to connect to the inside handle, said second clutch element configured to operate the locking bolt of the door lock; a first spring having a first end and a second end, said first end engaging said eccentric, axial tab and said second end being fixed to said projection, said first spring being arranged to enable recovery of the inside and outside handles; a pulling pin radially disposed, with respect to said head or disc, in said orifice; a second spring arranged to bias said pulling pin radially outwardly; a thruster rocker arm having an upper surface and being pivotally connected to said interior body; and a third spring being arranged between said worm-screw and said thruster rocker arm to bias said thruster rocker arm so as to push said thruster rocker arm against said pulling pin; wherein when said worm-screw is in an engagement position of the clutch mechanism, said worm screw pushes said thruster rocker arm via said third spring so as to push said pulling pin into said slot of said second clutch element, thereby locking said first clutch element to said second clutch element, such that rotational movement of the outside handle is transferred to said second clutch element to operate the locking bolt; wherein when in the engagement position of the clutch mechanism, a portion of said thruster rocker arm is disposed in said arched guide, such that said pulling pin is arranged to maintain continuous contact with said arched guide when sliding on said arched guide, and simultaneously maintains continuous contact with an edge of said thruster rocker arm, so as to slide on both said arched guide and the edge of said thruster rocker arm, and wherein continuity of the movement of said pulling pin is provided by said arched guide.