Christopher R Last

US Patent:

20040206142, Oct 21, 2004

Filed:

Apr 17, 2003

Appl. No.:

10/418177

Inventors:

Lucas Boesel - Milwaukee WI, US
Christopher Last - Milwaukee WI, US

International Classification:

E05B015/16
E05B029/04

US Classification:

070/417000, 070/492000

Abstract:

The lock according to some embodiments of the present invention has a housing, a cylinder disposed within the housing, and a tumbler received within the cylinder. The tumbler can be movable between a first position in which the tumbler directly or indirectly engages the housing to restrict rotation of the cylinder with respect to the housing, and a second position in which the cylinder is rotatable with respect to the housing. In some embodiments, the tumbler can be biased toward the first position. A key can be inserted into the cylinder to actuate the tumbler from the first position to the second position. Once the tumblers are disengaged from the housing, the cylinder can rotate with respect to the housing. The tumblers are made from aluminum to reduce corrosion between the tumblers and the zinc cylinder.