EP 0438266 A1 19910724 - An extension ladder assembly.
Title (en)
An extension ladder assembly.
Title (de)
Ausziehleiteraufbau.
Title (fr)
Assemblage d'échelle à coulisse.
Publication
Application
Priority
IE 15190 A 19900115
Abstract (en)
A ladder assembly (1) having a telescopic ladder (10) of lightweight tubular construction mounted on a trailer chassis (2). The ladder (10) has a bottom ladder section (12) pivotally mounted at one end of the chassis (2) for movement between a raised in-use position and a stored position against the chassis (2). A counter-weight (19) is attached at a lower end (18) of the bottom ladder section (12) to assist pivoting. A top ladder section (13) is slidable on the bottom ladder section (12). The top ladder section (13) has a pair of spaced-apart ladder sides (30) interconnected by rungs (32). A hollow anti-torsion bar (38), preferably of box-section, interconnects the rungs (32) substantially centrally located between the sides (30). A strut framework (50) pivotally connected at an upper end of the bottom ladder section (12) is engagable with strut receivers (56) at a front end of the chassis (2) to support the bottom ladder section (12) in the raised position. A bracing member (70) extends between the strut framework (50) and the bottom ladder section (13) to resist bending of the bottom ladder section (12) in use. <IMAGE>
IPC 1-7
IPC 8 full level
E06C 1/38 (2006.01); E06C 5/04 (2006.01); E06C 7/18 (2006.01)
CPC (source: EP)
E06C 1/38 (2013.01); E06C 5/04 (2013.01); E06C 7/185 (2013.01)
Citation (search report)
- [X] US 4202428 A 19800513 - HICKMAN RONALD P [GB]
- [Y] US 4094381 A 19780613 - WILKERSON DARRELL F
- [Y] FR 2473614 A1 19810717 - KINZIGER CLAUDE [FR]
- [Y] GB 853823 A 19601109 - OTTO WEINMANN
- [Y] US 1798070 A 19310324 - DEAN CHARLES M
- [A] GB 191006943 A 19101117 - BAYLEY HADRIAN [GB]
- [A] US 4396093 A 19830802 - ZIMMERMAN MAHLON N [US]
Designated contracting state (EPC)
DE ES FR GB IT
DOCDB simple family (publication)
DOCDB simple family (application)
EP 91300285 A 19910115; IE 15190 A 19900115