Ronald D Gray

US Patent:

20060207830, Sep 21, 2006

Filed:

Mar 21, 2005

Appl. No.:

11/084782

Inventors:

Ronald Gray - Rosemount MN, US
Jerome Hamilton - Woodbury MN, US

International Classification:

E06C 5/44

US Classification:

182018000

Abstract:

A bubble level designed to indicate the proper angle for use of Non-Self Supporting Portable Ladders is comprised of a housing () used to protect a bubble level () that will indicate when the proper angle is reached for safe use of the ladder as prescribed by OSHA Standard 1926.1053. The user will mount the device using a clamp () that can be rotated using the swivel hinge () over an 180 arc to locate the “Safe Use” indicator window at a 90 angle to the ladder side rail. The bubble level will be calibrated to indicate an angle of 78 from horizontal, the angle critical to the safety of the user. This device will provide a simple yet reliable indication of the safe use angle and can be carried by the user to mount on various ladders they may be working with or mounted permanently to all ladders considered for use.