Patent ID: 6629441
Filing Date: 2003-10-07
Classification: E05B,Y10T

Abstract:
A door unlocking system for use with a door combination comprising a door, a door enclosure border, and a door locking means,said door being displaceable between an open and a closed position, said door locking means comprising a lock barrel means, a female element and a latch bolt means comprising a male member, said lock barrel means being displaceable between an inactive configuration and an active configuration, said door comprising said latch bolt means, said door enclosure border comprising said female element, said male member and said female element being disposed and configured such that said male member is displaceable between an extended position wherein said female element is able to receive the male member for locking said door in said closed position and a retracted position wherein said male member is retracted from said female element so that said door is displaceable from said closed position to said open position, said latch bolt means comprising bolt biassing means for biassing the male member in said extended position, the door unlocking system comprising: a door grasping means displaceable between a first non-working position and a second actuation position, door grasp biassing means biassing the door grasping means in said first non-working position, pusher means operatively connected to said door grasping means; an intermediate engagement means; system biassing means comprising a first biassing component, a second biassing component, and a third biassing component; a retractor means operatively connected to the intermediate engagement means; connector means operatively connected to said lock barrel means; and connector retaining means displaceable between a retaining position and a non-retaining position; said retractor means being displaceable between a first retractor position and a second retractor position such that when the retractor means is displaced from said first retractor position to said second retractor position the retractor means engages the latch bolt means and urges the displacement of the male member from said extended position to said retracted position, and when the retractor means is displaced from said second retractor position to said first retractor position the retractor means disengages the male member such that the bolt biassing means displaces the male member to said extended position; said intermediate engagement means being displaceable between a first engagement position, wherein the pusher means is able to engage the intermediate engagement means such that said intermediate engagement means may be urged thereby to induce the retractor means to be displaced from said first retractor position to said second retractor position, and a second neutral position wherein the pusher means is unable to engage the intermediate engagement means; said first biassing component biassing the intermediate engagement means in the second neutral position; said retractor means and said intermediate engagement means being disposed and configured such that when the intermediate engagement means is in said second neutral position the retractor means is in said first retractor position, and such that when the intermediate engagement means is in said first engagement position the retractor means is in said second retractor position; said connector means being displaceable between an engagement configuration wherein the connector means engages and retains the intermediate engagement means in said first engagement position, and a disengagement configuration wherein the intermediate engagement means is in said second neutral position, said connector means being configured, such that when said lock barrel means is displaced from the inactive configuration to the active configuration, the lock barrel means displaces the connector means from said disengagement configuration to said engagement configuration, such that the intermediate engagement means induced to be displaced from said second neutral position to said first engagement position, and said connector retaining means is induced to displace from said non-retaining position to said retaining position by said second biassing component; said third biassing component biassing said connector means in said disengagement position; said connector retaining means being disposed such that when the connector retaining means is in said retaining position the connector retaining means retains the connector means in said engagement configuration, and such that when the connector retaining means is in said non-retaining position the connector means is caused to return to said disengagement configuration by said third biassing component; said connector means, said door grasping means, said pusher means, and said retractor means being disposed and configured such that: (A) when said connector means is in said engagement configuration and said door grasp means passes from said first non-working position to said second actuation position the pusher means engages said intermediate engagement means in said first engagement position so as to induce the connector retaining means to be displaced from said retaining position to said non-retaining and so as to induce the intermediate engagement means to displace the retractor means from said first retractor position to said second retractor position, and (B) when said door grasp means passes from said second actuation position to said first non-working position, the pusher means disengages the intermediate engagement means such that said first biassing component urges said intermediate engagement means to reset to said second neutral position, and said retractor means to reset to said first retractor position.