Lock assembly with over-torque defense system

Details Lock assembly with over-torque defense system Lock assembly with over-torque defense system

1999-10-21

2000-11-28

Gall, Lloyd A.

Locks

Special application

For control and machine elements

70224, 70422, 70472, E05B 1310

Patent

active

061519340

ABSTRACT:
A lockset mechanism (20, 120) is provided with a spindle subassembly (24, 124) having a spindle component (44, 128) particularly configured to fracture when an over-torque is applied thereto for uncoupling the handle subassembly (22, 122) from the latch bolt subassembly (26). A spring mechanism (64, 130) is operably disposed between the lockset housing (32, 164) and the spindle subassembly (24, 124) for urging the spindle subassembly (24, 124) including the fractured spindle component (44, 128) away from the handle subassembly (22, 122) to render the lockset mechanism (20, 120) inoperable thereby.

REFERENCES:
patent: 2063708 (1936-12-01), Swilens
patent: 2138856 (1938-12-01), Harp
patent: 2609679 (1952-09-01), Bremer et al.
patent: 4195502 (1980-04-01), Best et al.
patent: 4426858 (1984-01-01), Interrante
patent: 4550581 (1985-11-01), Best et al.
patent: 4589691 (1986-05-01), Foshee et al.
patent: 4667994 (1987-05-01), Foshee

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