Receptacles – Closures – Removable closure guided in rotary movement
Patent
1990-02-20
1992-02-11
Marcus, Stephen
Receptacles
Closures
Removable closure guided in rotary movement
220293, B65D 4106
Patent
active
050869426
DESCRIPTION:
BRIEF SUMMARY
The invention comprises a locking device for a tank opening cover, especially for an oil tank, in which the locking device elements work together with a bayonet curved track ridge in the tank opening, e.g., the neck, and wherein the invention can be secured in the tank under spring prestress in coaction with the bayonet track.
BACKGROUND OF THE INVENTION
Covers of this kind which give a quick closure by means of a bayonet joint, are known for numerous applications, for example, for oil tanks, the cooling water containers of a motor vehicle and the like. Cover locking devices are carried inside the cover designed for specific tanks. By a slight rotation of the cover, usually assisted by a suitable downward pressure, the locking elements of such devices are guided by a curved bayonet track ridge internally of the tank neck and generally stopped from rotation after a quarter turn.
A spring tension arrangement provides for a prestressing of the locking elements and a reliable guiding and a clamping of the cover to the tank. A sealing, with a ventilating drilled hole, if applicable, can be obtained by means of an additional seal.
Known covers consist of several parts, specifically, the actual cover, the inner part with the locking elements and a spring means, generally a spiral spring, for producing the desired prestress. Furthermore, the cover usually also has a member to be inserted as an outer support for the spiral spring.
Since the sheet metal part in the known constructions constitutes a rigid element with the locking elements, the spring had the task of bringing about a tolerance adjustment along with the prestressing and sealing of the cover.
SUMMARY OF THE INVENTION
The object of the present invention is to produce a cover of the type mentioned above that is simple and inexpensive to manufacture, viz., one that is especially suitable for mass production and closes securely.
That object is accomplished in the invention by using a bed plate having fastening members to fasten it to the cover, and having flexible arms wherein outer free ends have locking elements extending outwardly of the bed plate.
As a result of this arrangement, the cover is simpler and hence cheaper to manufacture because of its novel locking device. Practically speaking, the invention consists only of a single element, specifically, a bed plate from which fastening members to the cover and flexible locking elements are integrally formed together with flexible arms. This single integral unit replaces prior art constructions. A spring action and also a tolerance adjustment during the closing of the cover, that is, during the guiding of the locking elements of the curved bayonet track ridge of the cover are obtained by the arms projecting from the bed plate, which act like a centering support in the collar. A simple embodiment of the invention can consist of having curved flexible arms and projecting freely flexibly from the bed plate.
In the invention, two flexible arms are located opposite each other diametrically.
The shape of the curve of the arms and their free ends is made to fit the inner wall or neck of the tank, so that the locking elements can be guided suitably on the bayonet curved track ridges.
Although fastening of a lock device to a cover itself can be accomplished in any desired way,
the invention utilizes a simple but very effective fastening of the locking device to the cover wherein the bed plate has a center aperture into which a projection such as a tongue or pin carried by the cover enters the aperture to be clamped to the bed plate. The edges of the apertures have upstanding lugs or prongs that fit tightly around the cover pin. Such prongs can fit in recesses of the pin or into undercuts.
Prongs can be bent out of the plane of the bed plate at a slight slant so that the top edges grip against the circumferential wall of the cover pin, a simple unitary assembly and, above all, a unit that is capable of being assembled quickly.
To obtain a precisely defined position for the start of the cover rotation, the cov
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patent: 2531860 (1950-11-01), O'Neil, Jr.
patent: 4300702 (1981-11-01), Scharrer
patent: 4497419 (1985-02-01), Reitzel
Keicher Eckard
Merz Johann
Schmid Josef
Cronin Stephen
Marcus Stephen
Zahndradfabrik Friedrichshafen, AG.
Zalkind Albert M.
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