Door latch mechanism

Claim 1

A LATCH MECHANISM FOR A SWING DOOR COMPRISING: A SUPPORT HAVING TWO ANGULARLY RELATED PLATE PORTIONS, PIVOTAL LATCH DEVICE MEANS MOUNTED ON ONE OF SAID PLATE PORTIONS, DETENT MEANS PIVOTALLY MOUNTED ON SAID ONE PLATE PORTION AND ENGAGEABLE WITH SAID LATCH DEVICE MEANS FOR HOLDING THE SAME IN DOOR LATCHED POSITION, SAID DETENT MEANS HAVING A PART EXTENDING TOWARD THE OTHER OF SAID PLATE PORTIONS, A DETENT ACTUATING MEMBER PIVOTALLY MOUNTED ON SAID OTHER PLATE PORTION AND HAVING A PART TRANSVERSELY OVERLYING SAID PART OF THE DETENT MEANS, A CONTROL LEVER PIVOTALLY MOUNTED ON SAID OTHER PLATE PORTION AND HAVING A FIRST ARM OVERLYING SAID DETENT ACTUATING MEMBER AND A SECOND ARM TRANSVERSELY UNDERLYING SAID PART OF THE DETENT MEANS, COUPLING MEANS COUPLING SAID DETENT ACTUATING MEMBER AND SAID CONTROL LEVER FIRST ARM TOGETHER, SAID COUPLING MEANS INCLUDING OVERLYING SLOTS IN SAID DETENT ACTUATING MEMBER AND SAID CONTROL LEVER FIRST ARM, AND A BUSHING ELEMENT PROJECTING THROUGH SAID SLOTS, SAID CONTROL LEVER SLOT BEING ARRANGED TO ACCOMMODATE MOVEMENT OF SAID BUSHING ELEMENT SUBSTANTIALLY RADIALLY OF THE PIVOT AXIS OF SAID CONTROL LEVER, SAID ACTUATING MEMBER SLOT BEING ARRANGED TO ACCOMMODATE MOVEMENT OF SAID BUSHING ELEMENT BOTH RADIALLY AND CIRCUMFERENTIALLY OF THE PIVOT AXIS OF SAID ACTUATING MEMBER, SAID BUSHING ELEMENT BEING SHIFTABLE BY SAID CONTROL LEVER RADIALLY OF THE PIVOT AXIS OF SAID ACTUATING MEMBER INTO A FIRST POSITION THEREON IN WHICH MOVEMENT OF SAID BUSHING ELEMENT RADIALLY OF SAID CONTROL LEVER PIVOT AXIS WILL PIVOTALLY MOVE SAID ACTUATING MEMBER IN A DIRECTION TO ABUT AND SWING SAID DETENT MEANS TO CAUSE DISENGAGEMENT OF THE LATTER FROM SAID LATCH DEVICE MEANS, OR SAID BUSHING ELEMENT BEING SHIFTABLE BY SAID CONTROL LEVER RADIALLY OF THE PIVOT AXIS OF SAID ACTUATING MEMBER INTO THE PORTION OF SAID ACTUATING MEMBER SLOT ACCOMMODATING MOVEMENT CIRCUMFERENTIALLY OF THE PIVOT AXIS OF SAID ACTUATING MEMBER WITHOUT CAUSING SWINGING MOVEMENT OF THE LATTER IN DETENT MEANS ABUTTING DIRECTION, AND OUTER MANUALLY OPERABLE MEANS INCLUDING A LINK DIRECTLY COUPLED TO SAID BUSHING ELEMENT FOR MOVING THE LATTER IN SAID CONTROL LEVER SLOT IN SAID SUBSTANTIALLY RADIAL DIRECTION, SAID DETENT MEANS AND SAID SECOND ARM OF SAID ACTUATING MEMBER IN DISENGAGED POSITION OF SAID DETENT MEANS BEING IN ABUTTING RELATION AND PREVENTING SWINGING MOVEMENT OF SAID CONTROL LEVER TO THEREBY PREVENT MOVEMENT OF SAID BUSHING ELEMENT INTO THE PORTION OF THE SLOT IN SAID DETENT ACTUATING MEMBER PERMITTING MOVEMENT CIRCUMFERENTIALLY OF THE ACTUATING MEMBER PIVOT AXIS.