Chairs and seats – Bottom or back – Framework
Reexamination Certificate
1999-08-11
2001-04-24
Nelson, Jr., Milton (Department: 3624)
Chairs and seats
Bottom or back
Framework
C297S440140
Reexamination Certificate
active
06220669
ABSTRACT:
The invention relates to a seat frame of a vehicle seat with a seat support having two side parts and one rear tie-bar.
According to the present state of the art, seat frames are made in weldment. That means that each of the two side parts is welded with the rear tie-bar. A front tie-bar is often correspondingly welded too. The weld joints can be made by spot welding for example. This generally ensures a stable construction that meets the practical requirements.
A disadvantage of such a weldment for the seat frame of the type mentioned above is that the seat frame cannot be modified subsequently. If, for example, a tie-bar has to be provided with fastening means for a toddler seat, e.g. a shell in which a baby may rest, works have to be done on the tie-bar where borings have for example to be provided. Yet this does not result in an adequate fixation. Location devices for standardized toddler seats in particular and here more specifically the so-called Isofix-bars can hardly be retrofitted.
That is where the invention comes to bear. Its object is to develop a seat frame of a vehicle seat so that a tie-bar may subsequently be exchanged and replaced by a tie-bar with holding means for a toddler seat, more particularly with so-called Isofix-bars.
On the ground of a seat frame of the type mentioned above, the solution of this object is that the tie-bar is detachably connected to the two side parts and that at least two different tie-bars are provided that may be used according to choice, namely a standard tie-bar and a tie-bar provided with bars for a toddler scat, more particularly with a so-called Isofix-connection.
According to the invention, the seat frame is no longer designed, at least in the area of the connection between the two side parts and the tie-bar, as a weldment. Here, the two side parts are detachably connected to the rear tie-bar. Therefor, borings are for example provided in the rear area of the side part that are corresponding to borings in the rear tie-bar. Screws are stuck through the borings. Thus, the tie-bar may also be exchanged subsequently and may be replaced by a tie-bar with Isofix-bars for example. Working the old tie-bar or removing a weld joint is thereby not necessary.
The fact that the seat frame is essentially designed in modular system has still further advantages. It is indeed possible to mount at least one transverse shaft between the two side parts without the help of particular mounting aids as they arc usually required with a weldment.
Therefor, the present invention suggests providing at least one side part with a location indentation that is preferably open towards the bottom and that receives freely the transverse shaft, providing the side part, additionally to the location indentation, with first fastening means and having the transverse shaft encompassed with a bearing part that assumes the bearing of the transverse shaft, bridges over the location indentation and is provided with second fastening means corresponding to the first fastening means. The transverse shaft may thus be mounted subsequently when the tie-bar is already connected with the two side parts.
Before mounting the transverse shaft to the side walls it may be connected with two adjusting arms and one driving part. A ready-made transverse shaft with accessories may be provided this way and may be mounted only later.
In a preferred embodiment, at least one adjusting arm is located on the outer side of the corresponding side part. Another advantage is that one bearing part is arranged between one adjusting arm and one driving part.
REFERENCES:
patent: 4673215 (1987-06-01), Yokoyama
patent: 4695097 (1987-09-01), Muraishi
patent: 4850644 (1989-07-01), Kazaoka et al.
patent: 5284381 (1994-02-01), Aoki et al.
patent: 5518298 (1996-05-01), LaPointe et al.
patent: 5775661 (1998-07-01), Matsumoto et al.
patent: 5941601 (1999-08-01), Scott et al.
Becker Burckhard
Beneker Wilfried
Frohnhaus Ernst-Reiner
Jr. Milton Nelson
K. S. Cornaby
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