Gary K Christian
Engineers in Littleton, CO
License number
Colorado 10536
Issued Date
Sep 18, 1971
Renew Date
Feb 1, 2002
Expiration Date
Jan 31, 2004
Type
Professional Engineer
Address
Address
5962 So Sheridan Way, Littleton, CO 80123
Professional information
Safety Arrester For Mine-Shaft Conveyances Using Tubing Guides
US Patent:
4444293, Apr 24, 1984
Filed:
Aug 3, 1981
Appl. No.:
6/289186
Inventors:
Willard S. Paul - Lakewood CO
Gary K. Christian - Littleton CO
Gary K. Christian - Littleton CO
Assignee:
Card Corporation - Denver CO
International Classification:
B66B 518
US Classification:
187 87
Abstract:
A safety arrester for mine shaft passenger cages is provided wherein a pair of arresting cams are arranged to straddle the sides of a tubing guide positioned on each side of the mine shaft which tubing guide is used for stabilizing the movement of the cage. If the lifting cable should fail, a spring biased actuation mechanism will move causing the arresting cams to move into contact with the guide. As the cage is falling, the arresting cams act on the surfaces of the tubing guides to deform these surfaces. Also, the surface of the arresting cam comprises a deformable material so that, as the cage is falling, more and more of the surface of the arresting cam comes into contact with the surface of the tubing guide. Thus, the falling cage is gradually brought to a safe stop.