Title:
COMBINATION LADDERS, LADDER COMPONENTS AND METHODS OF MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO2004044365
Kind Code:
A3
Abstract:
Ladder configurations and components are provided including an outer rail assembly which is longitudinally adjustable relative to an inner rail assembly. The outer rail assembly may include a pair of spaced apart outer rails each fixedly coupled to an associated sleeve or sliding mechanism. Each sleeve is in turn slidably couple to an inner rail of the inner rail assembly. The outer rails may be positioned and oriented at an acute angle relative to the inner rails so as to provide an increased base distance between the two outer rails. Support structures are also disclosed which are coupled at multiple locations along a rail member and at least one location of a rung. Additionally, ladder hinges are disclosed including hinge components configured to effectively transmit loads from associated rails. In one embodiment the hinge may include a pinch prevention mechanism.
Inventors:
MOSS NEWELL RYAN
BOWERS JACK W
FRANCIS DAVID
BOWERS JACK W
FRANCIS DAVID
Application Number:
PCT/US2003/036043
Publication Date:
September 10, 2004
Filing Date:
November 11, 2003
Export Citation:
Assignee:
WING ENTPR (US)
International Classes:
E06C1/22; E06C1/32; E06C7/06; E06C7/42; (IPC1-7): E06C1/22; E06C1/18; E06C1/32
Foreign References:
| US2186119A | 1940-01-09 | |||
| NL1002235C1 | 1997-08-05 | |||
| US2144440A | 1939-01-17 | |||
| US4371055A | 1983-02-01 | |||
| US5279387A | 1994-01-18 | |||
| EP0324885A1 | 1989-07-26 | |||
| DE19539157A1 | 1997-04-24 |
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