US 11,732,530 B2
Extendable walkthrough device for ladders
N. Ryan Moss, Mapleton, UT (US); and Steven S. Miner, Springville, UT (US)
Assigned to Little Giant Ladder Systems, LLC, Springville, UT (US)
Filed by LITTLE GIANT LADDER SYSTEMS, LLC, Springville, UT (US)
Filed on Feb. 5, 2020, as Appl. No. 16/782,232.
Claims priority of provisional application 62/801,423, filed on Feb. 5, 2019.
Prior Publication US 2020/0248507 A1, Aug. 6, 2020
Int. Cl. E06C 7/18 (2006.01); E06C 1/08 (2006.01); E06C 1/12 (2006.01)
CPC E06C 7/182 (2013.01) [E06C 1/08 (2013.01); E06C 1/12 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A ladder comprising:
a first rail, a second rail spaced apart from the first rail, and a plurality of rungs extending between and coupled to the first rail and the second rail;
a walkthrough device including a first component, the first component comprising:
a sleeve;
a pole slidably coupled to the sleeve and configured for displacement relative to the sleeve between at least two positions including a retracted position and an extended position;
at least one bracket coupling the sleeve with the first rail, wherein the sleeve is mounted to a front surface of the at least one bracket at a positive angle relative to a longitudinal axis of the first rail;
a locking mechanism including a rod and a clamping block rotatably coupled with an end of the rod, the clamping block being abuttable with the first rail upon displacement of the rod relative to the at least one bracket;
wherein the locking mechanism and the at least one bracket are configured to facilitate removable coupling of the sleeve to the first rail.