US 12,215,547 B2
Ladders, rung assemblies for ladders and related methods
Christian Smith, Highland, UT (US); Benjamin Cook, Provo, UT (US); Sean Peterson, Payson, UT (US); Brian Russell, Saratoga Springs, UT (US); N. Ryan Moss, Mapleton, UT (US); Bryan Wright, Highland, UT (US); and Gary Jonas, 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 Nov. 22, 2019, as Appl. No. 16/693,013.
Application 16/693,013 is a continuation of application No. 14/849,917, filed on Sep. 10, 2015, granted, now 10,487,578.
Claims priority of provisional application 62/049,916, filed on Sep. 12, 2014.
Prior Publication US 2020/0165868 A1, May 28, 2020
Int. Cl. E06C 7/00 (2006.01); E06C 1/18 (2006.01); E06C 7/08 (2006.01)
CPC E06C 7/003 (2013.01) [E06C 7/08 (2013.01); E06C 1/18 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A ladder comprising:
a first assembly comprising a first pair of rails including a first rail and a second rail spaced away from the first rail; and
a rung assembly coupled between the first pair of rails, the rung assembly comprising:
a base member comprising an upper wall having a channel formed therein, the channel extending between the first rail and the second rail;
a displaceable member disposed within the channel and configured to be displaced from a first position to a second position relative to the base member, wherein a portion of the displaceable member protrudes above a surface of the upper wall when in the first position; and
at least one alert mechanism associated with the displaceable member and configured to provide an audible alert when the displaceable member is displaced from the first position to the second position;
wherein the at least one alert mechanism includes a pin, a collar slidably disposed about the pin, and a detent mechanism configured to hold the collar at a specified position on the pin until a force of a specified magnitude is applied to the collar; and
wherein, in response to the force of the specified magnitude being applied to the collar, the collar is movable relative to the base member.