GB2354434A

GB2354434A - Compression relief seat for persons

Info

Publication number: GB2354434A
Application number: GB9922139A
Authority: GB
Inventors: Benjamin Jasper Dobson
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-09-20
Filing date: 1999-09-20
Publication date: 2001-03-28
Also published as: GB9922139D0

Abstract

The seat comprises two load bearing supports A, B, which are arranged such that when a persin is seated there is no direct force acting up the spinal column. The supports are arranged as shown so that one supports the persons lumbar region and the other supports the legs at the upper part of the thigh but not directly on the base of the spine. In the preferred embodiment, the supports are arranged on the points of a right angled triangle as shown in fig. 1 where the ratios of the lengths of sides labelled as 1,2 and 3 are 1:1.1:1.45 respectively.

Description

2354434 Compression Relief Seating System.

General subject.

The invention relates to the supporting of the human body in a sifting position. The invention is of a design which can be used on most seating systems eg. chairs, benches etc.

Seating is of a basic design usually having a seat area which supports the bottom and most times a back for learning against once sat on the seat, the seat on all chairs takes 90% to 100% of the body weight, because of this 50% approx of the bodies weight is in tern taken by the lower half of the bodies back causing compression in the lower vertebrae of the back. After years of sitting this may cause damage to the lower vertebrae of the back because of the conventional way most seating works. By supporting the body in a new way the compression relief seating system can resolve this problem that most seating have.

The object of this invention is to support the body in a way that takes the weight away from the lower back and helps in peoples sitting posture.

Accordingly the seating system uses two main load bearing points which are positioned in specific relation to each other. These two load bearing points work in conjunction with each other to divide the weight of the body between them (not in equal amounts).

These two load bearing points may be of any material and for comfort reasons would usually be of a reasonable size (maximum sizes given in diagrams).They may also be supported in any type of frame as long as the correct ratios are used for: the positioning of the supports and their correct sizes and overhangs.

A preferred embodiment of this invention will now be described with refereqce to accompanying drawings in which:

Note: The main two load bearing points on this seating system are A and B, the point C shown in the diagram is a reference point that helps describe the positioning of the main supports and their relevant load bearing areas. the distance from each of the points A,B and C is given in ratios to each other $o that the key bases of the seating system stays the same in any changes to the scale of the invention.

Fig 1. This diagram shows the positioning of the two load bearing supports A and B the relevant distances between these positions is markedly numbers 1,2, and 3. These distances are worked out by ratios 1: 1. 1: 1. 45. Side one has the ratio of 1, side two has he ratio of 1. 1 and side three has the ratio of 1. 45. The angle on point C that these are positioned from is ninety degrees. The distance D of point B from ground level is relevant to the size of the occupant ( but the average height of a chair would be 45to47cm approx).this distance is not essential to the workings of the chair and may vary depending on regulations on this height.

2 Fig 2. This diagram shows the maximum size of the load bearing area A and B. The sizes of these areas are also worked by ratios: The lengths are taken as over hangs from the main two points A and B. A has two over hangs 4 and 5 these are maximum distances that start at point B and are worked out using the length of side 1 (fig 1) they both have the the ratio of 1:3 or one third the length of side 1 (these are maximum sizes from point B). The maximum sizes of the load bearing area from point A are labelled 6 and 7. The maximum ratio length given to 6 is 1:5 the length of side 3 (fig 1) starting at point A, or one fifth the length of side 3. The length given to 7 is a maximum of 60 cm( this length is not fundermental to the workings of the seating system so is just given a maximum length).

Figure 3.This diagram shows the fundermental principles that are at work in this seating system, arrows show lines of force that occurring when an occupant is using the seating system. Load bearing areaA creates pressure on the small of the back, pushing the spine into a more upright position stopping the occupant from slouching to heavily, and forcing the shoulders of the person back into there correct position. Load bearing area B is so positioned as to use the occupants own weight, in applying the pressure for area A, it is also located under the backs of the legs and lower bottom (depending on size of load area) so as to not apply any pressure to the base of the spine.The position of area A to area B is vital to the compression relief seating system if they are not in the relative ratio measurement to each other the system will not apply the force in the correct way and so will not work.

The shape and material of the supports can be of various types, which will be dependent on the usage the seating system is being put to. The frame that the supports are held in may also be of various designs, but the one constant in all of the systems various design will be the ratios measurement between supports A and B. 3

Claims

CLAIMS:

1. A seating system that can be used for all kinds of seating, that will take pressure off of the base of the spine and distribute it between two main load bearing points of varying sizes(maximurn sizes given) a system where the supports are so positioned as to help in the posture of it occupant and so helping to relieve long term back problems.

2.A seating system as claimed in Claim 1 where the main support positions are worked from three points A, B and C using the ratios of 1:1.1:1.45 and also the maximum sizes of the load bearing areas is as described in fig 2 (drawings attached)

3. A seating system as claimed in Claim 1 or Claim2 which consists of two main load bearing areas which are always positioned relative to each other and divide the occupants weight between them in their load bearing capacity.

4.A seating system as claimed in Claim 3 that may have any type of frame design for its structure as long as the main supports are correctly positioned.

5. A seating system as claimed in any of the proceeding claim which may have two load bearing points which may be made of any material and may vary in their shape and design but which are always in their relative positions to each other as described in accompanying diagrams.

6. A seating system substantially as herein described and illustrated in accompanying drawings.