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AU484241B2 - Trap door assembly for a manhole - Google Patents

Trap door assembly for a manhole

Info

Publication number
AU484241B2
AU484241B2 AU67529/74A AU6752974A AU484241B2 AU 484241 B2 AU484241 B2 AU 484241B2 AU 67529/74 A AU67529/74 A AU 67529/74A AU 6752974 A AU6752974 A AU 6752974A AU 484241 B2 AU484241 B2 AU 484241B2
Authority
AU
Australia
Prior art keywords
manhole
door assembly
trap door
trap
assembly
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
AU67529/74A
Other versions
AU6752974A (en
Inventor
Wilhelm Schweim Willi
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.)
Willi Wilhelm Schweim And Irmgard Agate Schweim
Original Assignee
Willi Wilhelm Schweim And Irmgard Agate Schweim
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 Willi Wilhelm Schweim And Irmgard Agate Schweim filed Critical Willi Wilhelm Schweim And Irmgard Agate Schweim
Priority to AU67529/74A priority Critical patent/AU484241B2/en
Application granted granted Critical
Publication of AU6752974A publication Critical patent/AU6752974A/en
Publication of AU484241B2 publication Critical patent/AU484241B2/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F11/00—Stairways, ramps, or like structures; Balustrades; Handrails
    • E04F11/02—Stairways; Layouts thereof
    • E04F11/04—Movable stairways, e.g. of loft ladders which may or may not be concealable or extensible
    • E04F11/06—Movable stairways, e.g. of loft ladders which may or may not be concealable or extensible collapsible, e.g. folding, telescopic
    • E04F11/062—Movable stairways, e.g. of loft ladders which may or may not be concealable or extensible collapsible, e.g. folding, telescopic folding
    • E04F11/064—Movable stairways, e.g. of loft ladders which may or may not be concealable or extensible collapsible, e.g. folding, telescopic folding with stringers overlapping when folded

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
AU67529/74A 1973-04-06 1973-04-06 Trap door assembly for a manhole Expired AU484241B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU67529/74A AU484241B2 (en) 1973-04-06 1973-04-06 Trap door assembly for a manhole

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AU67529/74A AU484241B2 (en) 1973-04-06 1973-04-06 Trap door assembly for a manhole

Publications (2)

Publication Number Publication Date
AU6752974A AU6752974A (en) 1975-10-09
AU484241B2 true AU484241B2 (en) 1975-10-09

Family

ID=3751789

Family Applications (1)

Application Number Title Priority Date Filing Date
AU67529/74A Expired AU484241B2 (en) 1973-04-06 1973-04-06 Trap door assembly for a manhole

Country Status (1)

Country Link
AU (1) AU484241B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2574456A1 (en) * 1984-12-07 1986-06-13 Rey Henri Retractable staircase

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2574456A1 (en) * 1984-12-07 1986-06-13 Rey Henri Retractable staircase

Also Published As

Publication number Publication date
AU6752974A (en) 1975-10-09

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