Supports – Stand – Understructure
Patent
1998-12-14
2000-08-01
Ramirez, Ramon O.
Supports
Stand
Understructure
2481888, A47B 9100
Patent
active
060954647
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to an arrangement for the structure of a chair having a central pillar carrying a seat provided with a back support, and coacting with a base structure including at least three feet consisting of supporting members integral with, and projecting transversely from, a central sleeve accommodating the pillar, the free end portions of the members projecting a given distance from the sleeve and having fastening elements for wheels or floor-contacting member by which the chair contacts a floor or other substructure.
There is usually a problem with this kind of chair, particularly when the back support is provided with a neck rest, in which there is a greatly increased risk of the chair tipping over if the standard base structure is used.
SUMMARY OF THE INVENTION
The object of the present invention is to achieve an extension of the feet included in the base of the chair, such that the tipping hazard and possible injury to the user as a result of tipping are, to a large extent, eliminated. The distinguishing features of the invention are disclosed in the accompanying claims.
As a result of the invention, there has now been achieved an arrangement in the base structure of a chair which excellently fulfils the above objectives, while being both simple and cheap to manufacture. With the aid of the inventive arrangement, which takes the form of an extension piece for each foot, the wheels or other floor-contacting means which may have been originally fitted on the feet, may be transferred to the extension pieces. These may be already fitted on the extension pieces upon delivery, if the chair has a back support provided with a neck rest, and if the latter is removed the extension pieces may also be removed, thus returning the chair to its standard construction without the enhanced base structure provided by the present invention. This is possible, since the inventive extension piece is fixed to the respective chair foot without any damage to the foot.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will now be described in more detail with the aid of a preferred embodiment example and with reference to the accompanying drawings, in which
FIG. 1 is a side view of a foot in the base structure of a chair in accordance with the present invention, the foot being provided with a castor wheel for bearing against the floor,
FIG. 2 is a view from above of the foot illustrated in FIG. 1,
FIG. 3 is a partial side view along the line III--III in FIG. 2, and
FIG. 4 is a cross-section through the extension piece along the line IV--IV in FIG. 1.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
As will be seen from the figures, particularly FIG. 1, the base structure 1 of a chair includes a foot 2, of which there are at least three. Each foot 2 includes a supporting member 5 fixed to and transverse to the longitudinal direction of a central sleeve 3 accommodating a pillar 4, for supporting an unillustrated chair seat. The members 5 project a given distance from the sleeve 3, and at their free ends 6 there are fastening element 7 for floor-contacting means, in this case castor wheels 10. In accordance with the invention, at least one, and preferably two, extension pieces 8 are fitted on feet 2 when the chair has been provided with a neck rest. The illustrated extension piece 8 is accordingly removably attachable to fastening element 7 of the member 5 in place of the wheels or floor-contacting means 10 which are normally attached thereto in the standard chair construction of the prior art. This structure thus achieves a greater spread of the floor-contacting means 10, which results in greater stability for the chair when it has been provided with an accessory such as a neck rest. In the illustrated example, the extension piece 8 has at its outer, free end 11 a fastening element 9 which is substantially the same as the fastening element 7. Consequently, the same wheel 10 can be mounted on the extension piece 8 in the same manner in which it is mounted on the fastening ele
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patent: 4128222 (1978-12-01), Wiczer
patent: 4187578 (1980-02-01), Little
patent: 4412667 (1983-11-01), Doerner
patent: 4930842 (1990-06-01), Wilkinson et al.
Heisey David
Mercado Medic AB
Ramirez Ramon O.
LandOfFree
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