Door latching apparatus

Closure fasteners – Bolts – Sliding

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Details

70481, 29216917, 292170, 292359, 292DIG60, E05C 112

Patent

active

046324399

ABSTRACT:
A door latch (24) suitable for latching a door (20) to a door frame (22). The door latch (24), in a preferred embodiment, has an adjustable nose bolt (36); is "panic unlatchable"; and can be operated by axial or rotational spindle forces supplied by, for example, a push button (48) or a door knob (120). The latch apparatus (24) preferably includes an adjustable nose bolt (36) which is adjustable in and out relative to the spindle (50). A trunnion (58) interposed between the inside handle (46) and the nose bolt (36) allows for relative adjustment of the nose bolt (36) with respect to the handle (46). In addition, a preferred embodiment of the latch apparatus (24) includes a lock lever (100) which forms a recess (108) suitable for capturing a spindle ear (110) to substantially prevent the spindle from operating the latch apparatus (24) to move the nose bolt (36) from a first position to a second position. Finally, a preferred latch apparatus (24) includes a spindle cam (78) which acts on inclined arms (82) of the handle (46).

REFERENCES:
patent: 618708 (1899-01-01), Merwin
patent: 1207123 (1916-12-01), Arsneau
patent: 1720640 (1929-07-01), Wread
patent: 2366934 (1945-01-01), Schlage
patent: 2978267 (1961-04-01), North et al.
patent: 3147608 (1964-09-01), Turner et al.
patent: 3248141 (1966-04-01), Turner
patent: 3490803 (1970-01-01), Rollins
patent: 3582121 (1971-06-01), Rollins
patent: 3765710 (1973-10-01), Orr
Design Patent Application Ser. No. 456,516; filed 01/07/83.
Design Patent Application Ser. No. 456,515; filed 01/07/83.
Design Patent Application Ser. No. 684,615; filed 12/21/84.

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