Claims
- 1. A ladder, comprising:a ladder frame; a plurality of steps secured to said ladder frame; a movable frame, said movable frame comprising an upper horizontal arm, a lower horizontal arm, and two side arms, said upper horizontal arm secured to said lower horizontal arm through said side arms; carriage assembly secured to said ladder frame, said carriage assembly comprising: a sleeve and a unitary rod slidably received by said sleeve, said carriage assembly extending along a longitudinal axis, said sleeve secured to said ladder frame and said rod secured to said movable frame, said rod extending through said upper horizontal arm and said lower horizontal arm and said sleeve positioned between said upper horizontal arm and said lower horizontal arm, said rod connected at an upper portion to said upper horizontal arm, whereby said ladder frame and said sleeve secured to said ladder frame are pivotable about the longitudinal axis relative to said rod; and an upper roller assembly attached to said movable frame and positioned above said upper horizontal arm and a lower roller assembly attached to a lower portion of said rod and positioned below said lower horizontal arm, said sleeve positioned between said upper roller assembly and said lower roller assembly.
- 2. A ladder as claimed in claim 1, wherein said ladder frame includes a lower end and an upper end, said carriage assembly secured to said upper end of said ladder frame.
- 3. A ladder as claimed in claim 1, further comprising a platform secured to ladder frame and positioned above said steps.
- 4. A ladder as claimed in claim 1, further comprising rollers attached to said lower end of said ladder frame, said rollers adapted to roll on a floor.
- 5. A ladder as claimed in claim 1, wherein said steps extend along the longitudinal axis.
- 6. A ladder as claimed in claim 1, further comprising a stop secured to an upper end of said rod coacting with said upper horizontal arm.
- 7. A ladder as claimed in claim 1, wherein said stop comprises a flange, said movable frame further comprising a collar secured to said upper horizontal frame, said collar receives said rod and is positioned between said washer and said upper horizontal frame, said washer prevents downward movement of said rod relative to said movable frame.
- 8. A ladder as claimed in claim 1, further comprising an adjustment sleeve slidably received to said rod and positioned between said sleeve and said movable frame and positioned below said sleeve, said sleeve rests on said adjustment sleeve, said adjustment sleeve adapted to adjust a height of said sleeve relative to a floor.
- 9. A ladder as claimed in claim 1, wherein said lower roller assembly is secured to said rod through a clamp assembly having two longitudinally spaced clamps.
- 10. A ladder as claimed in claim 1, further comprising, a horizontally extending arm attached to said sleeve and said ladder frame and an angled strut secured to said horizontally extending arm and said sleeve.
- 11. A ladder as claimed in claim 10, wherein said angled strut is secured to said sleeve between ends of said sleeve.
- 12. A ladder as claimed in claim 1, further comprising:a stop secured to an upper end of said rod coacting with said upper horizontal member; a collar secured to said upper horizontal frame, said collar receiving said rod and is positioned between said washer and said upper horizontal frame, said stop preventing downwardly movement of said rod relative to said movable frame; an adjustment sleeve, slidably received to said rod and positioned between said sleeve and said movable frame and positioned below said sleeve, said sleeve resting on said adjustment sleeve, said sleeve adjustment configured to adjust a height of said sleeve relative to a floor; a horizontally extending arm attached to said sleeve and rod ladder frame; and an angled strut secured to said horizontally extending arm and said sleeve.
- 13. A ladder as claimed in claim 1, wherein said upper roller assembly is pivotable about an axis parallel to the longitudinal axis relative to said movable frame.
- 14. A ladder as claimed in claim 13, further comprising a second upper roller assembly attached to said movable frame pivotable about an axis parallel to the longitudinal axis relative to said movable frame, said second upper roller assembly spaced apart from said upper roller assembly.
- 15. A track ladder for use with a storage rack, said track ladder, comprising:an upper track extending in a horizontal direction, a lower track extending in the horizontal direction, said upper track and said lower track spaced apart from and parallel to each other; and a ladder, comprising: a ladder frame; a plurality of steps secured to said ladder frame; a movable frame said movable frame comprising an upper horizontal arm, a lower horizontal arm, and two side arms, said upper horizontal arm secured to said lower horizontal arm through said side arms; a carriage assembly secured to said ladder frame, said carriage assembly comprising: a sleeve and a unitary rod slidably received by said sleeve, said carriage assembly extending along a longitudinal axis, said sleeve secured to said ladder frame and said rod secured to said movable frame, said rod extending through said upper horizontal arm and said lower horizontal arm and said sleeve positioned between said upper horizontal arm and said lower horizontal arm, said rod connected at an upper portion to said upper horizontal arm, whereby said ladder frame and said sleeve secured to said ladder frame are pivotable about the longitudinal axis relative to said rod; and an upper roller assembly attached to said movable frame and positioned above said upper horizontal arm and a lower roller assembly attached to a lower portion of said rod and positioned below said lower horizontal arm, said sleeve positioned between said upper roller assembly and said lower roller assembly, said upper roller assembly received by said upper track and said lower roller assembly received by said lower track, whereby said ladder can move in the horizontal direction along said upper track and said lower track, and said ladder can rotate about the longitudinal axis relative to said upper track and said lower track.
- 16. A track ladder as claimed in claim 15, wherein said upper track and said lower track include curved portions.
- 17. A track ladder system, comprising:a storage rack having a front face; an upper track extending in a horizontal direction attached to said front face; a lower track extending in the longitudinal direction, attached to said front face, said upper track and said lower track spaced apart from and parallel to each other; and a ladder comprising: a ladder frame; a plurality of steps secured to said ladder frame; a movable frame, said movable frame comprising an upper horizontal arm, a lower horizontal arm, and two side arms, said upper horizontal arm secured to said lower horizontal arm through said side arms; a carriage assembly secured to said ladder frame, said carriage assembly comprising: a sleeve and a unitary rod slidably received by said sleeve, said carriage assembly extending along a longitudinal axis, said sleeve secured to said ladder frame and said rod secured to said movable frame, said rod extending through said upper horizontal arm and said lower horizontal arm and said sleeve positioned between said upper horizontal arm and said lower horizontal arm, said rod connected at an upper portion to said upper horizontal arm, whereby said ladder frame and said sleeve secured to said ladder frame are pivotable about the longitudinal axis relative to said rod; and an upper roller assembly attached to said movable frame and positioned above said horizontal arm and a lower roller assembly attached to a lower portion of said rod and positioned below said lower horizontal arm, said sleeve positioned between said upper roller assembly and said lower roller assembly, whereby said ladder can move in the horizontal direction along said upper track and said lower track and said ladder can rotate about the longitudinal axis relative to said upper track and said lower track.
CROSS-REFERENCE TO RELATED APPLICATION
This application claims the benefit of U.S. Provisional Application Ser. No. 60/092,202, filed Jul. 9, 1998.
US Referenced Citations (21)
Foreign Referenced Citations (3)
Number |
Date |
Country |
691905 |
Oct 1930 |
FR |
832727 |
Oct 1938 |
FR |
271149 |
Jan 1930 |
IT |
Non-Patent Literature Citations (3)
Entry |
Storage Wall System (Lista), Catalog SW-255. |
Cotterman “Rolling Wood Ladders”, Bulletin WL-188, Sep. 26, 1995. |
Cotterman Co., Single Track Ladder Pricing effective Jul. 1, 1995. |
Provisional Applications (1)
|
Number |
Date |
Country |
|
60/092202 |
Jul 1998 |
US |