Dahlström, Roland (Västra Hamngatan 20 Göteborg, S-411 17, SE)
|1.||A portable sitting support, comprising: a saddle (11), including a concavely curved sitting surface, a support (12; 22; 52) for interaction with a supporting surface, and an attachment means (13; 53) arranged to connect said saddle to said support, characterized in that said support has a shape of a hollow cylinder, at least a portion of the circumferential surface of said cylinder has an essentially elliptical curvature facing said supporting surface at an idle sitting support, a major axis of an ellipse having a curvature essentially corresponding to said essentially elliptical curvature is essentially parallel to said supporting surface at an idle sitting support, and said attachment means is attached to two opposing parts of said support.|
|2.||The portable sitting support according to claim 1, wherein a crosssection of said hollow cylinder is essentially elliptic.|
|3.||The portable sitting support according to claim 1 or 2, wherein said major axis is at least 50% longer than a minor axis of said ellipse.|
|4.||The portable sitting support according to claim 1 or 2, wherein said major axis is at least twice as long as a minor axis of said ellipse.|
|5.||The portable sitting support according to any of claims 14, wherein said attachment means has a tubular shape extending through a hole in said circumferential surface facing said saddle and an end of which is attached to the inside of said portion of the circumferential surface facing said supporting surface.|
|6.||The portable sitting support according to any of claims 15, wherein said opposing parts are along a minor axis of said ellipse.|
|7.||The portable sitting support according to any of claims 16, wherein said hollow cylinder has bevelled ends, such that said support tapers in a forward direction for an idle sitting support.|
|8.||The portable sitting support according to any of claims 17, wherein said hollow cylinder has bevelled ends, such that said support tapers in an upward direction for an idle sitting support.|
|9.||The portable sitting support according to any of claims 17, comprising a heel attached to said circumferential surface to prevent excess rotation backwards.|
|10.||The portable sitting support according to any of claims 18, comprising a rubber material attached to at least a portion of said circumferential surface facing said supporting surface.|
|11.||The portable sitting support according to claims 9, wherein said rubber material is ribbed.|
Particularly, the present invention relates to a portable sitting support suitable for e. g. therapists.
BACKGROUND A therapist usually uses some type of treatment bench, upon which a patient lying down on the treatment bench when the patient is being treated. Many times the therapist needs to work in other places than in a treatment room whereto the patients come. There are, therefore, provided lightweight benches, which are portable such that the therapist may carry the treatment bench with him and therewith work in other alternative places than in a treatment room. However, such lightweight benches are still cumbersome and relatively heavy.
A patient may be lying down on the floor on a suitable groundsheet such that a therapist does not need to carry a treatment bench to an alternative working place. In order for the therapist not being, due to the low working position, forced to work with high load on the legs and back the therapist needs some form of sitting support to unload his legs and back.
In order for the therapist to be able to work in different positions over the patient the position of the sitting support needs to be adjustable. To facilitate for the therapist to easily take different working positions during the treatment of different parts of a patient the position of the support should be adjustable without need to lift the support. Further, the different working positions of the therapist over the patient, as well as movements between the different working positions,
should not unnecessarily load the legs and the back of therapist.
Similar situations and related problems arise also at other types of working places and working positions. A craftsman or the like may e. g. have use for a portable sitting support that is easily adjustable into different positions.
SUMMARY OF THE INVENTION An object of the present invention is to provide a sitting support that is relatively easy and handy, such that it is easily portable, and which during use easily may be adjusted, such that a user may take different working positions.
Another object of the present invention is to provide a sitting support that loads the user's legs and back as little as possible in more than one working position and that limits the risk for the user to slip off the sitting support.
The basis of the present invention is the knowledge that the above objects may be achieved by means of a sitting support, the position of which may easily be adjusted by using a rocking motion of the support.
The characteristics of a sitting support according to the present invention appear from claim 1.
An advantage of a sitting support formed according to the present invention is that the user may change working positions and reach different positions of e. g. a patient lying on the floor. A rotation forward of the sitting support thus provides an essentially straight movement for the user as the contact surface against the floor is essentially elliptically formed whereby the load on the legs and the back is unchanged in different working positions. Another advantage of the present
invention is that the user is sitting securely in a cup-shaped saddle without risk of slipping off the sitting support.
Further features and advantages of the present invention will be apparent from the following description and the appended claims.
The present invention will be described closer below with reference to the detailed description of embodiments and the appended drawings, which only illustrate and do not limit the present invention.
SHORT DESCRIPTION OF THE DRAWINGS Fig. 1 shows a side view of a sitting support according to a first embodiment of the present invention, Fig. 2 shows a front view of a support according to a second embodiment of the present invention, Fig. 3 shows a plan view of the support illustrated in Fig. 2, Fig. 4 shows a cross-section of the support illustrated in Fig.
3, Fig. 5 shows a cross-section of a support according to a third embodiment of the present invention and Fig. 6 shows the utilization of the sitting support in two different working positions and the movement between them.
DETAILED DESCRIPTION OF EMBODIMENTS In the following description certain specific details are given for explaining and not limiting purposes, such as specific techniques and applications, to provide a thorough understanding of the present invention. However, it is obvious for a person skilled in the art that the present invention may be performed in other embodiments departing from these specific details. In
other instances, a detailed description of well-known methods and arrangements are omitted not to obscure the description of the present invention with unnecessary details.
A first embodiment of the present invention will now be described with reference to Fig. 1.
A portable sitting support 10 comprises a saddle 11, a support 12 for support against a supporting surface, such as a floor, and an attachment means 13 to attach the saddle 11 to the support 12. The saddle 11 is cup-formed such that a user is sitting securely therein in different working positions attained by rocking the sitting support 10. The support 12 has the form of a hollow cylinder with an elliptical cross-section where the major axis of the ellipse is essentially parallel to the supporting surface when the sitting support is unloaded, i. e. in an idle position. The attachment means 13 is arranged essentially in the extension of the minor axis of the ellipse and attached in opposing parts of the circumferential surface of the cylinder 12.
The saddle 11 is attached to the attachment means 13, which preferably is vertically adjustable. The attachment of the saddle 11 is preferably also adjustable in the forward/backward direction relatively the attachment means 13 as well as adjustable towards the horizontal plane, i. e. angleable relatively the attachment means 13. Further, the support 12 may be reinforced 14,15 at the opposing attachment points for strengthened attachment to the attachment means 13. In order for the sitting support to obtain a good grip against the supporting surface, so that it does not slip during use, a rubber material may be attached on the part of the circumferential surface of the cylinder that is intended to interact with the supporting surface. Preferably, a ribbed rubber material is used for improved grip.
In order for the support to give a user a straight movement during change of working position the major axis needs to be longer than the minor axis in the elliptical cross-section.
Preferably, the major axis is at least 50% longer than the minor axis and even better at least twice as long as the minor axis.
To prevent the user from falling backwards off the sitting support backwards during incautious and heavy tilting a heel may be arranged in the back edge of the support which prevents the user from tilting to much backwards, such that he falls off the sitting support. The heel may be permanently attached to the support. The heel may also be temporarily attached to the support, such that an experienced user may choose to remove the heel.
The attachment means 13 has a tubular shape extending through a hole in the circumferential surface of the support 12 facing the saddle 11 and an end of the attachment means is attached to the inside of the portion of the circumferential surface facing the supporting surface. The attachment means 13 is attached in the opposing parts of the support 12 along the minor axis of the cylinder.
Due to hollowness of the support 12 it may be light. Further, due to the attachment of the attachment means 13 in two opposing attachment points of the support 13, the sitting support 10 may be light and still robust. Yet further, due to the cylinder shape of the support 12, the sitting support 10 is only rockable in the forward/backward direction and not sideways, and thus stable.
Hereafter a second embodiment of the present invention will be described with reference to Figs. 2-4. This second embodiment is identical with the first embodiment apart from the following differences.
The cylinder-shaped support 22 is bevelled at its ends such that the cylinder diminishes in the forward direction and in the upward direction. With the forward direction it is meant the direction in which the saddle moves when a user sitting on the sitting support is rocking forwards. With the upward direction is meant the direction from the supporting surface along the minor axis at an idle sitting support. By means of the bevels the contact surface against the supporting surface may be designed partly wider than without the bevels and during use still be able to be positioned between the legs of a patient lying on the supporting surface.
A third embodiment of the present invention will be next described with reference to Fig. 5. This third embodiment is identical with the first embodiment apart from the following differences.
The cylindrical support 52 has a cross-section in the form of half an ellipse. The lower part of the support, which is intended to interact with the supporting surface, is formed as half an ellipse while the rest of the support has the form of a straight plane along the major axis of the ellipse. Preferably, also this embodiment is provided with reinforcements 54,55 for attachment of the attachments means 53 to the cylinder 52. The cylinder-shaped support 52 is preferably bevelled at its ends such that the width of the cylinder diminishes in the forward direction. With the forward direction is as above mentioned the direction in which the saddle is moved when a user sitting on the sitting support is rocking forwards.
The use of the present invention will next be described with reference to Fig. 6.
A user 61 places a sitting support 60 formed according to any of the above embodiments between the legs of a patient 62 lying
down on the floor. During massage far down the back of the patient 62 the sitting support 60 is essentially used upright.
During massage further up the back of the patient 52 the user 61 bends his legs and in such a way moves the working position to a position where the hands of the user easier reaches intended parts of the back of the patient. Due to the form of the support an essentially straight movement is obtained when the user changes between the different working positions and the load on the user's legs and back is unchanged in the different positions.
It is obvious that the present invention may be varied in a plurality of ways. Such variations shall not be regarded as a departure from the scope of the present invention. All such variations that are obvious for a skilled person in the art are intended to be included within the scope of the present invention. A variation of a sitting support may e. g. be used by someone, such as e. g. a mechanic, a craftsman or a clerk, working with an object located at a certain elevation above the floor. Such a sitting support should then suitably comprise an attachment means that may be made longer than normally and that may have a broader support for interaction with the supporting surface, as the support in this case does not need to be placed between the legs of a patient lying on the supporting surface.
Further, a free-standing sitting support may also be used for remedial exercise to relieve the pressure of the back and neck of the user or to activate the muscles in the back and neck of the user.
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