US 6,629,582 B2 · Anti-slide out devices for straight and extension ladders

Abstract

A non-self-supporting ladder having an anti-slide-out device which enables a user to set up the ladder at the specified minimum ladder set-up angle (θ) or greater angles for precluding the base of the ladder from sliding away from a structure against which the ladder is leaning upon application of a weight on the ladder, but prevents the ladder to be set up at angles smaller than (θ). The device includes an inboard roller assembly having a bracket connected to each side rail of the ladder and a roller connected to each bracket oriented and disposed so as to impose a specified ladder inclination angle (θ), when the lower end of the ladder and the rollers simultaneously rest on a substantially flat horizontal surface. At set-up angles smaller than the specified minimum angle (θ), only the rollers rest on the horizontal surface, preventing the ladder from being set up.

Claims13

Dependent claims

A method for preventing slide-out of a straight or extension ladder comprising:

effecting a minimum ladder set-up angle between a support surface and said ladder approaching approximately 75.52° with a slide-out device moveably attached to a base of said ladder and in operative association with said support surface, said slide-out device precluding said base of said ladder from sliding away from a structure against which an upper end of said ladder is leaning upon application of a weight on said ladder when said ladder is at a desired angle of inclination of approximately 75.52° and thus a safe position, said slide-out device providing feedback, as a tactile response, in response to when said minimum ladder set-up angle is less than said desired angle of inclination by preventing the base of said ladder from contacting the support surface when said minimum ladder set-up angle is less than said desired angle of inclination and thereby forcing said ladder to slide away from said structure when said minimum ladder set-up angle is less than said desired angle of inclination.

Dependencies are inferred from the claim text.

Anti-slide out devices for straight and extension ladders

Life of this patent

Anti-slide out devices for straight and extension ladders

Life of this patent

Abstract

Claims13