US 12,435,567 B2
Extension ladder, ladder components and related methods
Jay Ballard, Mapleton, UT (US); Christian Smith, Highland, UT (US); Gary Jonas, Springville, UT (US); Sean Peterson, Payson, UT (US); and Brian Russell, Saratoga Springs, UT (US)
Assigned to LITTLE GIANT LADDER SYSTEMS, LLC, Springville, UT (US)
Filed by LITTLE GIANT LADDER SYSTEMS, LLC, Springville, UT (US)
Filed on Apr. 29, 2024, as Appl. No. 18/649,878.
Application 18/649,878 is a continuation of application No. 16/990,067, filed on Aug. 11, 2020, granted, now 12,000,210.
Application 16/990,067 is a continuation of application No. 14/930,065, filed on Nov. 2, 2015, granted, now 10,738,531, issued on Aug. 11, 2020.
Claims priority of provisional application 62/075,053, filed on Nov. 4, 2014.
Prior Publication US 2024/0279988 A1, Aug. 22, 2024
Int. Cl. E06C 1/12 (2006.01); E06C 7/06 (2006.01); E06C 7/46 (2006.01)
CPC E06C 1/12 (2013.01) [E06C 7/06 (2013.01); E06C 7/46 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A ladder comprising:
a base section comprising a first pair of spaced apart rails and a first plurality of rungs extending between and coupled to the first pair of spaced apart rails;
a fly section comprising a second pair of spaced apart rails and a second plurality of rungs extending between and coupled to the second pair of spaced apart rails, the fly section being slidably coupled to the base section; and
at least one rung lock device configured to selectively maintain the fly section in at least two different positions relative to the base section, wherein the at least one rung lock device includes:
an arm pivotally coupled with a rail of the first pair of spaced apart rails, wherein the arm is configurable to a neutral support position configured to allow a rung of the second plurality of rungs to contact the arm;
a flipper displaceable relative to the arm while the arm remains in the neutral support position and the fly section slides relative to the base section between the at least two different positions; and
wherein the at least one rung lock device is configured to selectively and consecutively engage a lower surface of each of at least two different rungs of the second plurality of rungs.