Ladder

• US 5,547,041 A
• Filed: 08/29/1994
• Issued: 08/20/1996
• Est. Priority Date: 09/21/1993
• Status: Expired due to Fees

• Current Assignee: Metalast SA (Fluidra, S.A.)
• Original Assignee: Astral Sociedad Anonima De Construcciones Metalicas
• Inventors: Morral Gispert, Jaime
• Primary Examiner(s): CHIN SHUE, ALVIN C
• Application Number:
  US08/297,046
• Time in Patent Office: 722 Days
• Field of Search: 182/228, 182/46
• US Class Current: 182/228.4
• CPC Class Codes: E06C 7/08 Special construction of longitudinal members, or rungs or other treads

Abstract

A ladder of the kind which comprises two elongated and vertically extending, rigid uprights, having axially extending recesses. A rung is provided having apertures defined by sleeves having uninterrupted inner surfaces, for receiving therethrough the uprights. An elongated split sleeve is provided having a protrusion on an inner edge for engaging with the axially extending recess of the upright. The split sleeve slides around and is coaxially aligned with the rigid upright. The arrangement of the ladder is simple to assemble, having few parts, which fit together without requiring additional bolting or securing.

Claims

1. A ladder comprising two elongated and vertically extending, rigid uprights, each having at least one axially extending recess portion;

at least one rung extending horizontally between said two uprights and having apertures defined by sleeves having uninterrupted inner surfaces for receiving therethrough said rigid uprights; and

a means for securing said rungs to said uprights comprising an elongated split sleeve in coaxial alignment around one of said uprights, said split sleeve having a protrusion on an inner edge for engaging with said axially extending recess portion and wherein said sleeve of said rung slides over said split sleeve aligned on around said upright, to secure said rung in position along the length of said rigid upright.

2. The ladder according to claim 1, wherein said split sleeve is provided with an outwardly extending flange, at one end, said flange extending around the periphery of said split sleeve.

4. The ladder according to claim 1 wherein said upright is a metal tube.

5. The ladder according to claim 1 wherein said sleeve has a reduced thickness region providing said sleeve with flexibility.

3. The ladder according to claim 6 wherein said split sleeve is provided with an axially extending elastic finger, said finger provided with an outwardly extending rib which overlies an edge of said aperture to provide engagement between said split sleeve and said sleeve of said rung.