GB381618A - Extension ladder - Google Patents
Extension ladderInfo
- Publication number
- GB381618A GB381618A GB20150/31A GB2015031A GB381618A GB 381618 A GB381618 A GB 381618A GB 20150/31 A GB20150/31 A GB 20150/31A GB 2015031 A GB2015031 A GB 2015031A GB 381618 A GB381618 A GB 381618A
- Authority
- GB
- United Kingdom
- Prior art keywords
- side rails
- section
- rollers
- welded
- carried
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C1/00—Ladders in general
- E06C1/02—Ladders in general with rigid longitudinal member or members
- E06C1/04—Ladders for resting against objects, e.g. walls poles, trees
- E06C1/08—Ladders for resting against objects, e.g. walls poles, trees multi-part
- E06C1/12—Ladders for resting against objects, e.g. walls poles, trees multi-part extensible, e.g. telescopic
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C7/00—Component parts, supporting parts, or accessories
- E06C7/08—Special construction of longitudinal members, or rungs or other treads
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Ladders (AREA)
Abstract
381,618. Ladders. MAGIRUS AKT.- GES., C. D. and HUMMEL, W. A., 1, Parkstrasse, both in Ulm-on-Danube, Germany. July 14, 1931, No. 20150. Addition to 380,541. [Class 20 (ii).] The side rails of the telescopic ladder described in the parent Specification are modified according to the present invention so that each comprises two hollow bars having a connecting portion which serves as a brace and which extends perpendicularly to the plane of the ladder. According to one construction, each side rail 21, Fig. 1, comprises two bars 22, 23 which are welded to the internal stiffening brace 24. The side rails of each upper section are guided by rollers 30 carried by the side rails of the section below, these rollers being journalled in bearings 31, 34 carried respectively by the side rails and brackets 34<1>. A further guiding means is provided by the overlapping engagement of the flanges 28, 29 of the side rails of adjacent sections. The brackets 341 are secured to extensions 32 of the tubular rings 33, which latter are welded to the side rails. Modified forms of side rails of somewhat similar section are also described. According to further modifications, the side rails are approximately S- or Z-shaped in cross section, one such construction comprising three hollow bars 67, 68, 69, Fig. 13, which are welded together, the part 68 constituting the central bracing. A still further form of side rail is shown in Fig. 15, in which two trapezium-shaped bars are welded to an internal brace. In this construction, the side rails 86 of the upper section are guided by rollers 84 mounted upon a rocking arm 80. This arm is carried by a bracket 81 secured to an extension of the rung 82 of the lower section. Similar rollers 90 mounted on rocking arms 87 are carried by the vertical stanchions 92 of the lower section and engage with an angle-section bar 91 secured to the section above.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB20150/31A GB381618A (en) | 1930-07-23 | 1931-07-14 | Extension ladder |
US552016A US2037860A (en) | 1930-07-23 | 1931-07-20 | Extension ladder |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2037860X | 1930-07-23 | ||
GB20150/31A GB381618A (en) | 1930-07-23 | 1931-07-14 | Extension ladder |
Publications (1)
Publication Number | Publication Date |
---|---|
GB381618A true GB381618A (en) | 1932-10-13 |
Family
ID=34740606
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB20150/31A Expired GB381618A (en) | 1930-07-23 | 1931-07-14 | Extension ladder |
Country Status (2)
Country | Link |
---|---|
US (1) | US2037860A (en) |
GB (1) | GB381618A (en) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2704178A (en) * | 1948-09-18 | 1955-03-15 | Wikstrand & Berg Ab | Extensible ladder |
US2981362A (en) * | 1959-05-11 | 1961-04-25 | Holan Corp | Vehicle ladder apparatus |
US3103258A (en) * | 1960-01-11 | 1963-09-10 | Ladders Inc | Ladder |
US3237719A (en) * | 1962-01-05 | 1966-03-01 | Donald Marsh | Power lift for ladders |
DE2844439C2 (en) * | 1978-10-12 | 1982-03-18 | Magirus-Deutz Ag, 7900 Ulm | Fire brigade ladder, the ladder stiles of which are made of square tubes |
DE3901687A1 (en) * | 1989-01-21 | 1990-07-26 | Boecker Albert Gmbh & Co Kg | TELESCOPICABLE GUIDE RAILS FOR SLOPE OR SCAFFOLDING ELEVATORS |
DE4206448C2 (en) * | 1992-02-27 | 1996-06-13 | Fgl Feuerloeschgeraetewerk Luc | Firefighter ladder with extendable ladder parts |
US7424943B2 (en) * | 2005-10-20 | 2008-09-16 | Superior Industries, Llc | Portable low profile drive-over truck dump conveyor system |
US7284947B1 (en) * | 2006-10-26 | 2007-10-23 | Superior Industries, L.L.C. | Braced telescoping support strut and system |
US20090101436A1 (en) * | 2007-04-18 | 2009-04-23 | Federal Signal - Fire Rescue Group | Telescopic aerial ladders; components; and methods |
ES2569259T3 (en) * | 2013-04-10 | 2016-05-09 | Iveco Magirus Ag | Aerial lifting system, in particular rotating stair system |
CN205591813U (en) * | 2016-03-14 | 2016-09-21 | 厦门新技术集成有限公司 | Extension ladder |
CN205713939U (en) * | 2016-05-03 | 2016-11-23 | 厦门新技术集成有限公司 | A kind of Retractive leg of extension ladder |
-
1931
- 1931-07-14 GB GB20150/31A patent/GB381618A/en not_active Expired
- 1931-07-20 US US552016A patent/US2037860A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
US2037860A (en) | 1936-04-21 |
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