RESILIENT GLIDE FOR A CHAIR

Abstract: The present invention refers to a resilient glide for a chair's leg for minimizing the noise that normally occurs when a chair is moved along a floor. The glide comprises a flexible element (5) with a small contact area (6) against the floor in order to minimize friction. The flexible element (5) comes off from a contact surface (4) for the chair's leg arranged in a sleeve (1) intended to surround the leg and is forming an integral part of said sleeve (1).

Description: TITLE RES ILIENT GLIDE FOR A CHAIR DESCRIPTION Technical field The present invention relates to a furniture leg collar intended to be attached to a chair leg and thereby eliminate scraping noise at the moving of the chair along a floor surface. The object of the present invention is to obtain a simple and rational chair leg collar by means of which scraping noise obtained at the movement of the chair along a floor surface can be substantially eliminated. Background of the invention It is previously known devices at furniture legs, in particular chair legs, to reduce the vibration noise which occurs at movement/displacement along a floor surface of a furniture. The noise is in particular disturbing in offices where a number of persons are working, such as school rooms, office landscapes, conference rooms, and the similar, in particular if several furniture are moved simultaneously, such as at pauses and breaks. SE-C-8106653-2 discloses a device comprising a vibration inhibiting elastic body provided with a friction reducing coating, the device being applied to every furniture leg provided with a foot, and whereby the vibration inhibiting body is compressed under the weight of the furniture, so much that the coating will placed within a groove in the foot which is designed with an abutting surface surrounding the body and the coating which surface is the contact area to the bedding. DE-A-19 801 509 discloses a device where a spring-loaded ball is situated in the chair or furniture leg, whereby, however, the object is primarily to facilitate movement of the furniture on the rolling body/ball. US-A-1, 839,593 discloses a spring-loaded sliding body which is arranged in a foot which is intended to be nailed into a leg of a chair/furniture. EP-A-0 572 310 discloses a device eliminating static electricity to be placed on a leg of a furniture/chair, whereby a spring-loaded ball is arranged as contacting means. The solutions of the problem to reduce friction noise deriving from furniture under displacement described above, and belonging to the prior art, all means complex structures with a advanced manufacture and/or application which leads to high costs for the product and thereby a reduced motivation to use the same. The present invention intends to, solve this problem. Description of the present invention It has now surprisingly turned out possible to be able to solve this problem by means of the present invention which is characterized in that a flexible, bendable element having a small contact surface against a thought surface, starts from an abutment surface of a cap arranged around a leg of a chair, which abutment surface is intended for the same thought surface, whereby said element is a material integrated part of said cap. Further characteristics are evident from the accompanying claims. By means of the present invention a very simple unit is obtained which is easily applied onto a leg of a chair, which can be varied to size and form in a simple way in connection with the manufacture of a tool therefore and which in a rational way solves the problem with a small contact area and simultaneous friction elimination and thereby elimination of disturbing noise. The present invention will be described in the following more in detail with reference to a preferred embodiment and with reference to the accompanying drawing, wherein FIG. 1 shows a cross-section of an embodiment of the present invention, and FIG. 2 shows the embodiment according to FIG. 1 seen from above. FIG. 3 shows a second preferred embodiment of the invention in a vertical cross-section; FIG. 4 shows the embodiment of Fig. 3 seen from above; FIG. 5 shows a further, preferred embodiment intended for inside application; and FIG. 6 shows the embodiment of Fig. 5 seen from above. 1 denotes a substantially cylindrical cap of an abrasion resistant and flexible, bendable, resilient plastic material, such as a polyolefin, e.g., polyethylene (HD; LD), polypropylene, or a two-component polymer. The cap 1 has in its one end 2 an opening to receive a leg of a chair (not shown) and in its other end 3 a partly covered opening. The end 3 has a substantially perpendicular to the cap, inwardly facing, annular abutment surface 4, which is partly intended to receive on the inside of the cap, a leg of a chair introduced into said cap, partly being the abutment area to a underlying surface on its outside and against a leg of a chair on its inside. From the annular abutment area a flexible, bendable element in the form of a tongue 5 extends radially inwardly, which on its underneath side has a partly spherical protrusion 6. The tongue 5 and the cap 1 are manufactured as integrated parts in one production moment and of the same material. The tongue 5 is separated from the cap 1 by a peripheral through-going slot 7. The protrusion 6 can also be a cylindrical part. When the cap 1 has been applied on the respective leg of a chair the resiliency of the polymer is such that a non-loaded chair will only rest upon the partly spherical protrusions 6 which means a very small abutment area to the underlying surface, partly due to the properties of the polymer, means a very small friction against the underlying surface at a displacement. When the chair is loaded by e.g., one sits down on it, the tongues 5 are pressed upwardly and the chair will substantially rest upon the underlying surface along its abutment surface 4. In figures 1 , and 2 it is shown how the elastic element is attached along a line/fastening point 9, in figures 3 and 4 an example of a construction which facilitates more than one fastening point is shown. The choice of number of fastening points depends on the geometry and dimension of the leg of the chair. In figures 5 and 6 a cap to a leg of a chair is shown which shall be mounted on the inside of a leg of a chair. By means of its simplicity the cap with its said element can easily be applied and exchanged after wear out. It is apparent to the one skilled in the art that the diameter and length of the cap can be varied after the needs that different legs of chairs demands, as well as the form of the cap can be adopted to different legs of chairs, such as circular, quadratic or rectangular cross- sections, as well as the width and thickness of the abutment surface 4 can be varied to obtain optimal properties, in the same way as the size and filling of the circular, quadratic or rectangular opening of the element 5. In the same way, the element 5 can be attached diametrically to the abutment surface to the formation of a bridge from which the protrusion extends in a central point of the bridge. As chairs are often produced in large series the cost of the present leg of chair cap can be kept low. The cap can also be adapted to an inside arrangement in the leg of a chair, i.e., has a cylindrical insert part, whereby the abutment surface 4 is arranged as an outwardly extending collar on the insert part.

Claims: CLAIMS 1. Chair leg collar intended to be attached to a chair leg and thereby eliminate scraping noise at the moving of the chair along a floor surface, characterized in that a friction eliminating, flexible, bendable element (5) having a small contact surface (6) against a thought surface, starts from an abutment surface (4) of a cap (1) arranged around a leg of a chair, whereby said element (5) is a material integrated part of said cap (1), whereby a non-loaded chair will only rest upon the contact surface (6), which leads to a small contact area to the underneath surface, and causes a small friction only against the underlying surface and whereby, when the chair is loaded said element (5) is arranged to be pressed upward whereby the chair will essentially rest against the underlying surface along its abutment surface (4). 2. Chair leg collar according to claim 1, characterized in that the contact surface (6) is a protrusion arranged on said element (5). 3. Chair leg collar according to claim 2, characterized in that the protrusion is partly spherical. 4. Chair leg collar according to claim 2, characterized in that the protrusion is cylindrical. 5. Chair leg collar according to claim 1-4, characterized in that said element (5) is a tongue (5) attached in its one end and receiving said contact surface (6) at its other end. 6. Chair leg collar according to claim 1-4, characterized in that the element (5) is a unit being attached to the abutment surface (4) in at least two points having a substantially centrally placed protrusion (6). 7. Chair leg collar according to claim 1-4, characterized in that the tongue (5) is one-sided attached to the abutment surface (4). 8. Chair leg collar according to claim 1, characterized in that the abutment surface (4) is an annular surface being essentially perpendicular to the longitudinal axis of the cap (1) inwardly directed and partly covering the cross-sectional area of the cap. 9. Chair leg collar according to one or more of the preceding claims, characterized in that the cap with its integrated tongue is manufactured in a steel alloy. 10. Chair leg collar according to one or more of the preceding claims, characterized in that the material is a plastic material or rubber material.

Inventors: ERIKSSON TOMAS, RYDELL JAN, ERIKSSON, TOMAS, RYDELL, JAN
Applicants: ERIKSSON TOMAS, PRODUKTUTVECKLING I SVERIGE HB, RYDELL JAN, ERIKSSON, TOMAS, RYDELL, JAN
Application year: 2001
Main classification: A47B91
IPC codes: A47B91, A47C7