EP1762694A3 - Metal ladder and method of manufacture thereof - Google Patents

Metal ladder and method of manufacture thereof Download PDF

Info

Publication number
EP1762694A3
EP1762694A3 EP06291438A EP06291438A EP1762694A3 EP 1762694 A3 EP1762694 A3 EP 1762694A3 EP 06291438 A EP06291438 A EP 06291438A EP 06291438 A EP06291438 A EP 06291438A EP 1762694 A3 EP1762694 A3 EP 1762694A3
Authority
EP
European Patent Office
Prior art keywords
step
central portion
metal ladder
manufacture
method
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.)
Granted
Application number
EP06291438A
Other languages
German (de)
French (fr)
Other versions
EP1762694B1 (en
EP1762694A2 (en
Inventor
Patrick Lachant
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CDH GROUP
Original Assignee
Centaure
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to FR0509346A priority Critical patent/FR2890682B1/en
Application filed by Centaure filed Critical Centaure
Publication of EP1762694A2 publication Critical patent/EP1762694A2/en
Publication of EP1762694A3 publication Critical patent/EP1762694A3/en
Application granted granted Critical
Publication of EP1762694B1 publication Critical patent/EP1762694B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D39/00Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/06Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes in openings, e.g. rolling-in
    • B21D39/063Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes in openings, e.g. rolling-in for assembling ladders
    • EFIXED CONSTRUCTIONS
    • E06DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06CLADDERS
    • E06C7/00Component parts, supporting parts, or accessories
    • E06C7/08Special construction of longitudinal members, or rungs or other treads
    • E06C7/082Connections between rungs or treads and longitudinal members
    • E06C7/085Connections between rungs or treads and longitudinal members achieved by deforming the rung or the stile

Abstract

Metal ladder, comprising at least one step (4) and two uprights (2, 3), this step (4) being provided with a central portion and two end portions, at least one of the two end portions having, when viewed in transverse section, external dimensions different from the external dimensions of the central part, also measured in cross section, characterized in that said end portion is of substantially reduced geometrical shape in a ratio homothetic to that of the central part, a connection zone being defined between the central portion and said end portion, this connection area reproducing the geometry of the intersection between the central portion of the step and at least one amount.
EP20060291438 2005-09-13 2006-09-12 Metal ladder and method of manufacture thereof Active EP1762694B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR0509346A FR2890682B1 (en) 2005-09-13 2005-09-13 Metal scale and method of manufacturing such scale

Publications (3)

Publication Number Publication Date
EP1762694A2 EP1762694A2 (en) 2007-03-14
EP1762694A3 true EP1762694A3 (en) 2010-01-20
EP1762694B1 EP1762694B1 (en) 2013-05-01

Family

ID=36579291

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20060291438 Active EP1762694B1 (en) 2005-09-13 2006-09-12 Metal ladder and method of manufacture thereof

Country Status (3)

Country Link
EP (1) EP1762694B1 (en)
ES (1) ES2422427T3 (en)
FR (1) FR2890682B1 (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB384935A (en) * 1931-11-05 1932-12-15 Anders Wikstrand Improvements in ladders
US2951550A (en) * 1958-11-05 1960-09-06 Howard B Rich Ladder construction
FR1459966A (en) * 1965-10-12 1966-06-17 Tubesca improved scale tubular bars
US3283402A (en) * 1963-08-23 1966-11-08 White Metal Rolling & Stamping Methods for fabricating lightweight metal ladders
FR2100519A1 (en) * 1971-10-27 1972-03-24 Chevant Claude
WO1995011366A1 (en) * 1993-10-22 1995-04-27 Blue Steel Oy An apparatus for securing a ladder rung to a ladder rail
FR2795127A1 (en) * 1999-06-16 2000-12-22 Tubesca Metallic scaffolding ladder with steps crimped on the uprights

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI71391C (en) * 1984-03-13 1986-12-19 Karolon Oy Frequency requirement for steaming specific steel

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB384935A (en) * 1931-11-05 1932-12-15 Anders Wikstrand Improvements in ladders
US2951550A (en) * 1958-11-05 1960-09-06 Howard B Rich Ladder construction
US3283402A (en) * 1963-08-23 1966-11-08 White Metal Rolling & Stamping Methods for fabricating lightweight metal ladders
FR1459966A (en) * 1965-10-12 1966-06-17 Tubesca improved scale tubular bars
FR2100519A1 (en) * 1971-10-27 1972-03-24 Chevant Claude
WO1995011366A1 (en) * 1993-10-22 1995-04-27 Blue Steel Oy An apparatus for securing a ladder rung to a ladder rail
FR2795127A1 (en) * 1999-06-16 2000-12-22 Tubesca Metallic scaffolding ladder with steps crimped on the uprights

Also Published As

Publication number Publication date
EP1762694A2 (en) 2007-03-14
EP1762694B1 (en) 2013-05-01
FR2890682B1 (en) 2009-02-20
FR2890682A1 (en) 2007-03-16
ES2422427T3 (en) 2013-09-11

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