Joints and connections – Split end with laterally movable opposed portions – With separate force-applying means
Patent
1996-12-31
1998-09-08
Kim, Harry C.
Joints and connections
Split end with laterally movable opposed portions
With separate force-applying means
403314, 403321, 15145, F16B 204
Patent
active
058036466
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to an apparatus for the detachable fastening of cleaning implements, such as brooms, scrubbing brushes, etc. to a stick or handle, which at its end has two fork-shaped, resilient arms, which can be fixed by means of a fixing device in bores of the cleaning implement, the fixing device having a handle and an operating element positioned between the arms and which is in engagement with the arms with contact faces which spreads the element outwards or inwards by rotation or displacement.
2. Description of the Prior Art
Numerous handle or stick fastenings are known, which allow a simple and rapid replacement of worn or spent cleaning implements or an interchange between different cleaning implements. DE 2,606,400 C2 describes a stick fastening, in which a toggle body is positioned between the fork-shaped, resilient arms and is mounted in a rotary manner. To the toggle body is connected a handle enabling the user to rotate the toggle body. The toggle body is in engagement with the inside of the arms with contact faces. The contact faces are so shaped that the arms are spread outwards on rotating the toggle body, which leads to a fixing to the cleaning implement. If the toggle body is rotated back, as a result of their resilience the arms can return to their inwardly drawn position.
It has been found that although with the known stick fastening untrained persons can interchange or replace the cleaning implement in simple and rapid manner, there is a risk that over a period of time dirt and dust can collect between the contact faces of the toggle body and the corresponding faces of the arms, so as to significantly increase the friction between these two components, so that relatively high forces must be expended in order to rotate the toggle body and consequently fix the arms. This can make it much more difficult or impossible to use the stick fastening for persons having only limited physical strength.
SUMMARY OF THE INVENTION
The invention provides an apparatus of the aforementioned type in which, even after a long period of time, an easy adjustability is ensured.
In the case of an apparatus for the detachable fastening of cleaning implements, the invention solves the problem of the prior art in that the contact faces of the operating element are constructed on rotary bearing parts, which roll on the arms during the adjusting movement of the operating element.
Thus, according to the invention, the sliding movement occurring in the known construction between the operating element, which is preferably a toggle body fitted to the handle or connected in one piece thereto, and the arms or the resulting sliding friction is replaced by a rolling movement or a rolling friction. It has been found that in this way the user has to apply 30 to 40% lower operating forces for the purpose of adjusting the toggle body and for fixing the arms.
If during the course of time dirt or dust should collect on the rotating bearing parts, which are preferably bearing rollers or rolls, or if the surfaces of the normally metallic arms should corrode, then the rolling behaviour tends to improve, because sliding effects of the bearing parts are avoided. This can also be brought about by roughening the surfaces of the bearing parts and/or the arms.
A good guidance of the arms on the toggle body during the adjusting movement can be ensured by forming on the surface of the bearing parts an all-round depression in which the arms roll.
The bearing parts are preferably mounted in rotary manner on the toggle body, which can be achieved by subsequent fitting, e.g. the cushioning of the bearing parts in the toggle body. However, it is also possible to make the toggle body and the bearing parts from different plastics in a two-component injection moulding process and a single operation, so that separate fitting is rendered unnecessary. The toggle body and the bearing parts should be made from different plastics having a limited mutual friction, so that there is only a lim
REFERENCES:
patent: 4169297 (1979-10-01), Weihrauch
patent: 4237573 (1980-12-01), Weihrauch
patent: 4455103 (1984-06-01), Hackenberg
patent: 5221154 (1993-06-01), Foulquier et al.
Coronet-Werke GmbH
Kim Harry C.
LandOfFree
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