Freestanding ladder structure
AssigneeConfer Plastics, Inc.
InventorRaymond C. Confer
Life of this patent
Estimating the term…
Abstract
A freestanding ladder structure has a first base member arranged on one side of an object to be bridged, a second base member arranged on the other side of the object, and a raised platform supported above the object by two ladder members having their lower end portions engaged with the base members. The various parts and components of the ladder structure are hollow or tubular and may be conveniently formed of plastic by a well known blow molding technique. Where necessary, a reinforcing insert is arranged within a component to resist flexure or bending thereof. Some components are provided with hook members engagable with other components to prevent unintended separation of the assembled components.
Claims8
A freestanding ladder structure adapted to rest on a support to bridge an object, comprising:
- a platform adapted to be positioned above said object;
- a first ladder member arranged on one side of said object and having a lower end portion and having an upper end portion supportively engaging said platform;
- a second ladder member arranged on the opposite side of said object and having a lower end portion and having an upper end portion supportively engaging said platform, the side-pieces of said first and second ladder members being hollow tubular members;
- a reinforcing insert positioned within each of said side-pieces to resist flexure thereof;
- a first base member operatively arranged between said first ladder member lower end portion and said support;
- and
- a second base member operatively arranged between said second ladder member lower end portion and support, each of said base members being provided with a recess adapted to receive the lower end portion of the associated ladder member, each of said ladder member lower end portions being provided with at least one hook member engageable with the associated base member recess to prevent unintended separation of each ladder member from its base;
- whereby a person may traverse said ladder structure to cross said object.
Dependencies are inferred from the claim text.