초록 ▼

A tilt latch (10) for a sash window (12) has a bolt stop. The sash window (12) is disposed within opposed guide rails (16) on a master frame (14). The sash window (12) is comprised of a top sash rail (20), a base (22) and two stiles (24,26) connected together at their extremities. The tilt-latch (10

A tilt latch (10) for a sash window (12) has a bolt stop. The sash window (12) is disposed within opposed guide rails (16) on a master frame (14). The sash window (12) is comprised of a top sash rail (20), a base (22) and two stiles (24,26) connected together at their extremities. The tilt-latch (10) is adapted for releasably securing the sash window (12) to the master frame (14). The tilt-latch (10) is comprised of a housing (42) adapted to be supported by the top rail (20). The housing (42) has an outward end opening (44). A latch bolt (46) is disposed within the housing (42) and has a nose adapted for engaging a respective one of the guide rails (16). A protrusion (80) is located either on the latch bolt (46) or the housing (42) and a lock wall (86) is located either on the housing (42) or the latch bolt (46). The protrusion (80) has a stop surface (84) and is moveable between a first position defining a prevent position (94) wherein the stop surface (84) is adapted to abut the lock wall (86) to prevent retraction of the latch bolt (46) into the housing (42), and a second position defining a deflected position (96) wherein the stop surface (84) does not abut the lock wall (86) to allow retraction of the latch bolt (46) into the housing (42). The protrusion (80) is biased to the prevent position.

대표청구항 ▼

[ We claim:] [1.] For a sash window disposed within opposed guide rails on a masterframe, the sash window comprised of a top rail, a base and two stiles connected together at their extremities to form a frame, a tilt-latch adapted for releasably securing the sash window to the master frame, the tilt

[ We claim:] [1.] For a sash window disposed within opposed guide rails on a masterframe, the sash window comprised of a top rail, a base and two stiles connected together at their extremities to form a frame, a tilt-latch adapted for releasably securing the sash window to the master frame, the tilt-latch comprising:a housing adapted to be supported by the top rail, the housing having an outward end opening;a latch bolt disposed within the housing and having a nose adapted for engaging a respective one of the guide rails;means for biasing the latch bolt through the outward end opening;a protrusion located on one of the latch bolt and the housing and a lock wall located on the other of the housing and the latch bolt, the protrusion having a stop surface and moveable between a first position defining a prevent position wherein the stop surface abuts the lock wall as the latch bolt is attempted to be retracted to prevent retraction of the nose of the latch bolt into the housing, and a second position defining a deflected position wherein the stop surface does not abut the lock wall to allow retraction of the latch bolt into the housing; and,means for biasing the protrusion to the prevent position.