BE772947A - SAFETY DEVICE FOR CLOSING MANHOES - Google Patents

SAFETY DEVICE FOR CLOSING MANHOES

Info

Publication number
BE772947A
BE772947A BE772947A BE772947A BE772947A BE 772947 A BE772947 A BE 772947A BE 772947 A BE772947 A BE 772947A BE 772947 A BE772947 A BE 772947A BE 772947 A BE772947 A BE 772947A
Authority
BE
Belgium
Prior art keywords
manhoes
closing
safety device
safety
closing manhoes
Prior art date
Application number
BE772947A
Other languages
French (fr)
Original Assignee
Fond De Meru Comp D
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 Fond De Meru Comp D filed Critical Fond De Meru Comp D
Publication of BE772947A publication Critical patent/BE772947A/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D50/00—Closures with means for discouraging unauthorised opening or removal thereof, with or without indicating means, e.g. child-proof closures
    • B65D50/02—Closures with means for discouraging unauthorised opening or removal thereof, with or without indicating means, e.g. child-proof closures openable or removable by the combination of plural actions
    • B65D50/06—Closures with means for discouraging unauthorised opening or removal thereof, with or without indicating means, e.g. child-proof closures openable or removable by the combination of plural actions requiring the combination of different actions in succession
    • B65D50/067—Closures with means for discouraging unauthorised opening or removal thereof, with or without indicating means, e.g. child-proof closures openable or removable by the combination of plural actions requiring the combination of different actions in succession using integral or non-integral accessories, e.g. tool, key
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B23/00—Specially shaped nuts or heads of bolts or screws for rotations by a tool
    • F16B23/0007—Specially shaped nuts or heads of bolts or screws for rotations by a tool characterised by the shape of the recess or the protrusion engaging the tool

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pressure Vessels And Lids Thereof (AREA)
  • Binders And Loading Units For Sheaves (AREA)
BE772947A 1970-11-02 1971-09-22 SAFETY DEVICE FOR CLOSING MANHOES BE772947A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7039363A FR2112597A5 (en) 1970-11-02 1970-11-02

Publications (1)

Publication Number Publication Date
BE772947A true BE772947A (en) 1972-01-17

Family

ID=9063627

Family Applications (1)

Application Number Title Priority Date Filing Date
BE772947A BE772947A (en) 1970-11-02 1971-09-22 SAFETY DEVICE FOR CLOSING MANHOES

Country Status (6)

Country Link
BE (1) BE772947A (en)
DE (1) DE2154449A1 (en)
ES (1) ES198619Y (en)
FR (1) FR2112597A5 (en)
LU (1) LU64182A1 (en)
NL (1) NL7114648A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2484570A1 (en) * 1980-06-11 1981-12-18 Cipel Key-operated recessed bolt fastener - uses head socket with radial invert bore and key in form of rod with radial lug on counter bevelled end
FR2709156B1 (en) * 1993-08-19 1995-12-08 Jean Brun Round flat head screws and their impact wrench.

Also Published As

Publication number Publication date
DE2154449A1 (en) 1972-05-04
ES198619U (en) 1975-06-16
FR2112597A5 (en) 1972-06-23
ES198619Y (en) 1975-11-16
LU64182A1 (en) 1972-05-15
NL7114648A (en) 1972-05-04

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