Closure fasteners – Bolts – Screw
Patent
1985-07-25
1987-03-03
Wolfe, Robert L.
Closure fasteners
Bolts
Screw
292209, 292DIG38, 292DIG65, E05C 504
Patent
active
046470930
DESCRIPTION:
BRIEF SUMMARY
CROSS REFERENCE TO RELATED APPLICATION
This United States application stems from PCT International Application No. PCT/DK84/0015 filed Nov. 27, 1984.
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to a safety door latch assembly of the type containing a rotatable grip with a ring-shaped flange surrounding a substantially cylindrical portion of a stationary handle element having an elastically resilient arresting means whose exterior is formed with an arresting face which a stop face on the inner side of the grip flange will engage upon rotation of the grip in the opening direction from the closed position when the arresting means is in an unaffected position, the grip being so arranged that the arresting means can be actuated through the flange of the grip to disengage the arresting face from the stop face .
2. Description of the Prior Art
In the Danish Patent Application No. 2961/83 such a safety closure is shown and described for medicine bottles and similar containers containing substances which may be dangerous to children.
BRIEF SUMMARY OF THE INVENTION
The invention is based on the finding that it may be desirable to protect not only individual medicine containers, but also cabinet compartments in which such containers and other objects dangerous to children, such as razor blades and pointed scissors, are kept, and the present safety latch assembly can be used for this purpose without difficulty.
Accordingly, the safety latch assembly of the invention is characterized in that it is mounted on a cabinet with a door so as to prevent and allow, respectively, opening of the door in two different rotary positions of the grip.
This use permits the elastically resilient arresting means to be provided in a particularly expedient manner.
Another expedient detail is an embodiment of the latch assembly in which the arresting means, instead of being actuated by a thin-walled portion of the ring-shaped flange of the grip, is actuated by a special actuation means. The actuation means may be directly accessible from the outside.
In another embodiment of the locking mechanism itself, the latch assembly may be reclosed after having been opened, without the grip having to be rotated back to its starting position.
Further embodiments of the turn latch enable the door to be clamped somewhat upon rotation of the grip, and provide for snap-closing of the latch assembly irrespective of the rotary position of the grip.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will be explained more fully below with reference to the accompanying drawing, wherein
FIG. 1 is a cross-sectional view through a portion of a cabinet wall and a hinged cabinet door fitted with an embodiment of the safety latch assembly of the invention;
FIG. 2 is a perspective view of the grip of the latch assembly;
FIG. 3 is a cross-sectional view taken along the line III--III in FIG. 1;
FIG. 4 is a perspective view of the grip for another embodiment of the latch assembly of the invention; and
FIG. 5 is an enlarged cross-sectional view of parts of the grip and stationary element of this closure with the arresting means of the grip in blocking engagement with the stop face of the stationary element.
DETAILED DESCRIPTION
In FIG. 1, the numeral 10 designates a side wall in a cabinet for the storage of medicine or other objects which may be dangerous to children, and the numeral 11 designates a door which is hinged at one side edge (not shown) and whose shown side edge mounts a safety latch assembly of the invention. This latch assembly has a stationary closing element generally designated 12 and a rotary closing element generally designated 13.
The stationary closing element 12 is formed by a body of revolution, which preferably consists of a suitable plastics material which is relatively rigid and hard while possessing some elasticity. The closing element 12 has a head disposed on the outer side of the door and formed with a substantially frusto-conical inner portion 14 and a substantially cylindrical outer portion 15. T
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patent: 2468646 (1949-04-01), Verhoff
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patent: 3652112 (1972-03-01), Panelli
patent: 3844438 (1974-10-01), St. Pierre et al.
patent: 3858740 (1975-01-01), Lestaevel
patent: 3917097 (1975-11-01), Uhlig
patent: 4055361 (1977-10-01), Moses
patent: 4216985 (1980-08-01), Sorensen
patent: 4427124 (1984-01-01), Marshall et al.
Illich Russell W.
Wolfe Robert L.
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