J NIGEL ELLIS
Engineering in Wilmington, DE
License number
Massachusetts 37299
Issued Date
Mar 26, 1993
Expiration Date
Jun 30, 2018
Type
Safety Engineer
Address
Address
Wilmington, DE 19803
Professional information
Portable Safety Ladder Assembly
US Patent:
7992681, Aug 9, 2011
Filed:
Feb 26, 2007
Appl. No.:
11/679164
Inventors:
James T. Anderson - Sierra Vista AZ, US
J Nigel Ellis - Wilmington DE, US
J Nigel Ellis - Wilmington DE, US
International Classification:
E06C 1/00
US Classification:
182106
Abstract:
A safety ladder assembly and a safety extension used in combination with a ladder suitable to permit safe and easy access to the landing areas, working platforms, scaffolds, etc. The assembly includes safety extension members having a plurality of horizontal handgrips ergonomically designed to prevent falls from the ladder when a user is ascending upward or descending downward.