Patent ID: 6502435
Filing Date: 2003-01-07
Classification: E05B,Y10S,Y10T

Abstract:
A manual lock for a moveable wing comprising a hollow frame supporting an in-fill portion and defined by an interior and an opposed exterior side, the manual lock including an engageable means, a casing,engaging means including at least one engaging member supported by the casing and displaceable to a latched configuration to be engaged with the engageable member, to restrain the wing from displacing in an opening direction operating means to cause each engaging member to displace to and from the latched configuration including a hand operable interior-operating member operably connected by a rocker to each engaging member by slide means including a rectilinearly displaceable slide, the operating means further including a cylinder having a key operable barrel operably coupled to a first pinion, the first pinion and slide being operably connected by a drive recess of the slide disposed towards the first pinion and defined by a first drive shoulder and the second drive shoulder and a protruding third drive shoulder of the first pinion radially disposed from the axis of rotation of the first pinion and which locates between the first and second drive shoulders to couple the slide and first pinion whereby displacement of one causes displacement of the other, the slide being displaceable to and from a latching position corresponding to each engaging member being latched by operation of the interior-operating member to cause the rocker to displace to cause the slide to displace and by operation of the cylinder to cause the first pinion to displace to cause the slide to displace, the manual lock being displaceable to a first locked configuration characterized by the slide being in the latching position, each engaging member being latched and the first pinion being in a further displaced position wherein the third drive shoulder has left the drive recess to abut the surface of the exit shoulder which is then defined by a normal vector which passes through the axis of rotation of the first pinion, the slide thereby being unable to exert a moment on the first pinion to cause the first pinion to rotate to thereby be restrained from displacing by the first pinion.