Joints and connections – Member ends joined by inserted section – Expansible section
Reexamination Certificate
2000-01-03
2001-09-11
Kim, Harry C. (Department: 3629)
Joints and connections
Member ends joined by inserted section
Expansible section
C403SDIG001, C411S055000, C411S080600
Reexamination Certificate
active
06287044
ABSTRACT:
BACKGROUND OF THE INVENTION
The invention relates to a fitting to be detachably fastened to a furniture part with a fitting body which is to abut the furniture part. At least one dowel-like expansion sleeve is anchored to the fitting body and can be inserted into a drilled hole of the furniture part, and a pin shaped expansion member for expanding the expansion sleeve projects through an opening in the fitting body.
SUMMARY OF THE INVENTION
It is the object of the present invention to provide an improved fitting which can be mounted on a piece of furniture, and the piece of furniture has bores for holding the fitting wherein the bores have a very small diameter.
According to the invention, this is achieved because the expansion sleeve also projects through an opening in the fitting body and is provided with at least one flap projecting sideways from the expansion sleeve. The expansion member is provided with a head, which, when the fitting is mounted, presses the flap onto the side of the fitting body which is to face away from the furniture part.
In a preferred embodiment of the invention, the expansion sleeve is provided with two flaps which are diagonally opposed to each other. Preferably, the two flaps are inclined with respect to a longitudinal axis of the expansion sleeve.
When the expansion member is tightened, its head presses on the flaps of the expansion sleeve and the flaps are pushed on to the fitting body. If a force acts on the fitting body urging the fitting body away from the piece of furniture, the fitting body struts against the flaps and is thereby anchored directly to the expansion sleeve. The expansion sleeve itself is held in the piece of furniture. In a conventional fitting having no such flaps, the fitting body is held by the head of the expansion member. The expansion member could be easily moved out of the expansion sleeve, especially if the expansion member is provided with a non-locking thread which is screwed into a thread in the expansion member. Such a non-locking thread with a high pitch would be necessary to make rapid mounting and removal of the fitting possible.
In a preferred embodiment, the expansion member is provided with two threads having different pitches, and one of the threads is self-locking. Advantageously, the expansion sleeve is provided with a female thread, and one of the threads of the expansion member engages the female thread.
The fitting body, the expansion sleeve and the expansion member are assembled before they are mounted on the piece of furniture as a unit. The expansion member will not be fully inserted into the expansion sleeve, and the expansion sleeve comprises at least two expansion legs having ends which project away from the fitting body. the end of each expansion legs has an angled portion that projects towards a central axis of the expansion sleeve in the form of a cone and engages one of the threads of the expansion member. When the expansion member is fully inserted into the expansion sleeve so that its head abuts the flaps of the expansion sleeve, the fitting is rigidly fastened to the piece of furniture.
In a further embodiment of the invention, the expansion sleeve is provided with arms which are bent to abut the side of the fitting body which is to be further away from the furniture part. The arms each have ends which protrude through holes in the fitting body. Preferably, the ends are riveted to the fitting body.
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Julius Blum Gesellschaft m.b.H.
Kim Harry C.
Wenderoth , Lind & Ponack, L.L.P.
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