Patent ID: 9151114
Filing Date: 2015-10-06
Classification: E06C,F16B

Abstract:
1. A locking mechanism for selectively securing and unsecuring a linkage of individual ladder sections of a telescopic ladder, said telescopic ladder having stiles, and said telescopic ladder being extendable or retractable by sliding said ladder sections relative to one another along a longitudinal axis of said ladder, said locking mechanism comprising: a bridge element, a longitudinal axis of said bridge element aligned along the longitudinal axis of said ladder; a lever base, configured to be fixedly coupled to one of said stiles; a lever, pivotably coupled about an axis perpendicular to the longitudinal axis of said bridge element and pivotably coupled to said lever base about an anchor axis; a guiding track; a track follower, which is linearly displaceable along said guiding track; wherein each of said guiding track and said track follower is fixedly coupled to a respective one of: said bridge element, and said lever; at least two securing rods, coupled to respective distal ends of said bridge element on either side of said lever base, said securing rods aligned in parallel to one another, each of said securing rods configured to be displaceably confined within a respective bore in apertures that pass through the stiles of a plurality of said ladder sections; and a lever-securing mechanism, configured to form-fittingly secure said lever within said bridge element, wherein said locking mechanism is shifted into a locked position by pivoting said lever toward a first rotational trajectory, urging said track follower in a first direction along said guiding track, and linearly displacing said securing rods into respective ones of said apertures through multiple ladder sections, securing the linkage of said ladder sections, said lever-securing mechanism form-fittingly securing said lever within said bridge element when said locking mechanism is in a locked position, and wherein said locking mechanism is shifted into an unlocked position by pivoting said lever toward a second rotational trajectory opposite said first rotational trajectory, urging said track follower in an opposite direction along said guiding track, and linearly displacing said securing rods out from said apertures through said multiple ladder sections, unsecuring the linkage of said ladder sections.