Back to results
US 4,012,929 AGranted
Latch construction with improved anti-violation features
AssigneeEmhart Industries, Inc.
InventorPaul G. Solovieff
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeEmhart Industries, Inc.
InventorPaul G. Solovieff
Estimating the term…
A bolt is reciprocally extended and retracted in a door by a latch driving mechanism operably connected to exterior and interior operator assemblies projecting from a mounting opening between faces of the door. A pair of inwardly dished reinforcing plates edge abut the door faces spanning the door opening and the exterior operator assembly is secured inwardly against its respective reinforcing plate by primary fastening screws engaged with a lock frame of the exterior operator assembly, through the latch driving mechanism and end secured in the opposite interior reinforcing plate. If a hand actuated interior operator assembly is used, the interior operator is rotatably mounted on the interior cover which is secured to the interior reinforcing plate by secondary fastening screws endwise secured in the primary fastening screws, but if the interior operator assembly includes a lock, the interior operator assembly is secured inwardly against the interior reinforcing plate by the lock frame being similarly engaged by secondary fastening screws. In the latch driving mechanism, a pair of longitudinally extending driving levers are rearwardly operably connected to the exterior and interior operators and forwardly pivotally connected within a rearwardly opening bolt cavity to the bolt for movement thereof. The rearward ends of the driving levers are movably guided along latch frame guide surfaces by pin connection therewith, retention against such guide surfaces being maintained by a spring constantly resiliently urging the driving lever forward ends downwardly about their pivotal connection to the bolt. The spring is C-shaped positioned between the driving levers with an upper leg bearing upwardly against the bolt and a lower leg resting downwardly against the bolt pivot pin and terminating rearwardly thereof with downward engagement in slots of the driving levers.
In a latch construction of the type for mounting in doors and the like with a bolt extendable from a door edge, a latch driving mechanism mounted within the door operably connected to said bolt movable for moving said bolt between extended and retracted positions, an exterior operator assembly projecting outwardly from an exterior door face at a transverse opening through the door including a lock frame mounting a lock cylinder telescoped by a surrounding annular cover inwardly abutting said exterior door face around said door opening, an interior operator assembly projecting outwardly from an interior door face at said door opening including an interior operator and an annular cover inwardly abutting said interior door face around said door opening, said lock cylinder of said exterior operator assembly and interior operator of said interior operator assembly being operably connected to said latch driving mechanism for selectively moving said latch driving mechanism, and fastening means engaged between said lock frame of said exterior operator assembly and said interior operator assembly retaining assembly of said exterior and interior operator assemblies with said latch driving mechanism and said door;
In a latch construction of the type having a longitudinally slideable reciprocal bolt movable forwardly and rearwardly into extended and retracted positions by a generally longitudinally extending driving lever, a forward end of said driving lever being pivotally connected to said bolt within a rearwardly opening bolt cavity pivotal upwardly and downwardly about a transverse axis, a driving member rotatable about a transverse axis having a generally radially extending and transversely opening driving slot formed therein, a transverse driving pin through a rearward end of said driving lever and through said driving member driving slot slideable along said driving slot, said driving pin in transverse extension also being slideable along a guide surface formed transversely of a latch frame member, said guide surface having a longitudinally extending portion terminating at least forwardly in a generally downwardly projecting end slot, said driving pin sliding along said guide surface longitudinally extending portion during reciprocal movement of said bolt by rotation of said driving member and moving downwardly into said guide slot at said forward end when said bolt is moved fully into its extended position;
Dependencies are inferred from the claim text.