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GB1283934A - Improvements relating to metal ladders - Google Patents

Improvements relating to metal ladders

Info

Publication number
GB1283934A
GB1283934A GB2138/70A GB213870A GB1283934A GB 1283934 A GB1283934 A GB 1283934A GB 2138/70 A GB2138/70 A GB 2138/70A GB 213870 A GB213870 A GB 213870A GB 1283934 A GB1283934 A GB 1283934A
Authority
GB
United Kingdom
Prior art keywords
improvements relating
tabs
ladders
metal ladders
ribs
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
Application number
GB2138/70A
Inventor
Robert Anton Englhardt
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.)
Indal Canada Ltd
Original Assignee
Indal Canada Ltd
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
Application filed by Indal Canada Ltd filed Critical Indal Canada Ltd
Priority to GB2138/70A priority Critical patent/GB1283934A/en
Priority to US23738A priority patent/US3638759A/en
Priority to DE19702029743 priority patent/DE2029743A1/en
Publication of GB1283934A publication Critical patent/GB1283934A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • E06C7/082—Connections between rungs or treads and longitudinal members
    • E06C7/084—Rungs comprising projecting tabs or flanges
    • 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
    • E06C7/082—Connections between rungs or treads and longitudinal members
    • E06C7/085—Connections between rungs or treads and longitudinal members achieved by deforming the rung or the stile

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ladders (AREA)

Abstract

1283934 Ladders INDAL CANADA Ltd 10 Dec 1970 [16 Jan 1970] 2138/70 Heading E1S A metal ladder has outer and, optionally inner longitudinal ribs 15, 16 along each stile, and tabs 24, 25 at the rung ends passed through slots in the stiles and crimped over. The rungs may be of parallelogram section, with the tabs being extensions of the two shorter sides, which are located by the ribs.
GB2138/70A 1970-01-16 1970-01-16 Improvements relating to metal ladders Expired GB1283934A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB2138/70A GB1283934A (en) 1970-01-16 1970-01-16 Improvements relating to metal ladders
US23738A US3638759A (en) 1970-01-16 1970-03-30 Metal ladders
DE19702029743 DE2029743A1 (en) 1970-01-16 1970-06-16 Metal ladder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2138/70A GB1283934A (en) 1970-01-16 1970-01-16 Improvements relating to metal ladders

Publications (1)

Publication Number Publication Date
GB1283934A true GB1283934A (en) 1972-08-02

Family

ID=9734268

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2138/70A Expired GB1283934A (en) 1970-01-16 1970-01-16 Improvements relating to metal ladders

Country Status (3)

Country Link
US (1) US3638759A (en)
DE (1) DE2029743A1 (en)
GB (1) GB1283934A (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3970400A (en) * 1973-07-09 1976-07-20 Robert John Reid Deformingly interlocked structural joint
DE2910618C2 (en) * 1979-03-17 1981-06-19 Hailo-Werk Rudolf Loh Gmbh & Co Kg, 6342 Haiger Ladder with steps and two longitudinal bars
DE2910617C2 (en) * 1979-03-17 1981-07-16 Hailo-Werk Rudolf Loh Gmbh & Co Kg, 6342 Haiger Ladder with steps and two longitudinal bars
EP0017486B1 (en) * 1979-04-05 1983-10-05 William Bailey Method of and apparatus for forming a joint between a step and a stile of a ladder
US4655320A (en) * 1984-12-14 1987-04-07 Benboid Pty Ltd. Ladder means and method of production
US5180031A (en) * 1990-12-11 1993-01-19 Smith Daniel S Gardener's aid for sloped ground
US6899213B1 (en) * 2000-10-20 2005-05-31 Lankfer Diversified Industries, Inc. Brake-transmission interlock device

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US944000A (en) * 1908-08-01 1909-12-21 Heinrich Schoenich Ladder.
GB497082A (en) * 1936-03-13 1938-12-05 Heinrich Wuester Jun Improved process of manufacturing step-ladders and so forth
US2957543A (en) * 1956-05-23 1960-10-25 White Metal Rolling & Stamping Extension ladders
US3279051A (en) * 1965-04-05 1966-10-18 Minshall Aubrey Wilson Method of forming a joint between a metal rail and a hollow metal rung

Also Published As

Publication number Publication date
US3638759A (en) 1972-02-01
DE2029743A1 (en) 1971-07-29

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees