Measuring and testing – Dynamometers – Responsive to force
Reexamination Certificate
2000-05-18
2001-11-06
Noori, Max (Department: 2855)
Measuring and testing
Dynamometers
Responsive to force
C297S284200
Reexamination Certificate
active
06311570
ABSTRACT:
FIELD OF INVENTION
The invention relates to a method of adjusting a lying or sitting element with a supporting frame and elastic strips running transversely to this with adjustable initial tension which are downwardly deformed to varying extents when a person is placed on them.
DESCRIPTION OF THE RELATED ART
A lying element is known from EP 0 270 582, in which several non-extensible strips running transversely to the carrier frame are provided on a supporting frame. The length of the strips is adjustable. The contour of the loaded element is determined, independently of the weight of the person lying on it, by the length of the non-extensible strips. The pressure between the strips and the parts of the body resting on them inevitably results from the anatomical conditions.
On the other hand a lying element with elastic strips running transversely to the supporting frame is known from U.S. Pat. No. 2,788,531. The individual strips are not adjustable, but have differing spring characteristics chosen according to statistical considerations. The elasticity of the strips, which is determined by laterally arranged springs, is so great that it is supposedly immaterial whether the user uses the apparatus in a side position or a back position. With the apparatus according to U.S. Pat. No. 2,788, 531, both the contour of the loaded bed and the bearing pressure are established according to the individual conditions. Bearing in mind that, to calculate the statistically determined ideal contour, the human body is assumed to be rotationally symmetrical and that users may display substantial differences from the statistical average, true lying comfort is at best achieved by chance here.
SUMMARY OF THE INVENTION
With the apparatus developed by the applicant which is outlined at the beginning, the contour of the loaded element is determined by elastic strips, the tension of which is adjustable. This means that it is possible to optimally adjust the lying element for the individual user.
To this end, it is provided according to the invention, that an ideal contour of the deformed lying surface and an ideal pressure distribution are individually determined for the user and that, while the user is resting on the lying element, both the deformation of the strips and the bearing pressure are measured and approximated to the desired value by changing the tension.
The ideal contour of the deformed lying surface is sensibly defined not only by theoretical considerations but also by measuring the figure and in particular the shape of the back of the user. Ultrasound measuring apparatuses are suitable aids for this.
With regard to the pressure distribution, it can be considered ideal if each supported part of the skin is equally loaded. The invention firstly allows rough deviations from this ideal in the form of loading peaks to be avoided. In addition, the pressure acting on individual body parts can deliberately be kept relatively high in order to effect a gradual alteration of the predetermined original contour of the user.
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patent: WO 87/07125A (1987-12-01), None
Hoffmann & Baron , LLP
Noori Max
LandOfFree
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