Plane sander with exchangeable part of sanding sole

Details Plane sander with exchangeable part of sanding sole Plane sander with exchangeable part of sanding sole

2001-06-19

2004-03-16

Wilson, Lee D. (Department: 3723)

Abrading

Frame or mount

Portable abrader

C451S342000, C451S344000, C451S358000, C451S353000, C451S359000

Reexamination Certificate

active

06705931

ABSTRACT:

FIELD OF THE INVENTION
The invention relates to a sanding machine, comprising a housing with drive means arranged in the housing, a substantially flat sanding sole which is mounted on the housing for movement in its main plane, wherein the drive means are adapted to drive the sanding sole in a reciprocating movement, wherein the sanding sole comprises a first part on which the drive means engage and comprises a second part adjacent to the first part which is releasably connected to the first part.
BACKGROUND OF THE INVENTION
Such a sanding machine is known from the brochure “Catalogue of D.I.Y. tools 1999-2000” of Black & Decker.
Such a sanding machine is shown in this catalogue, wherein a part of the sole is embodied separately. In the present case this is a tip of the sole of the sanding machine.
This tip is the part of the sole where the sandpaper wears most. When the foremost tip of the sandpaper is worn, the relevant part of the sole can for instance be rotated a half-turn in order to place a less worn piece of sandpaper at the tip.
The object of this measure known from the prior art is better use of the sandpaper.
There is however a need for a sanding apparatus, wherein the shape of the sanding sole is adaptable. This would provide the possibility of being able to use a rectangular sole for sanding for instance large surfaces, and of using a sanding sole provided with a tip for sanding corners which are difficult to reach.
There is a further need for a sanding apparatus with which operations other than sanding can also be performed, both separately and in combination.
The object of the present invention is to provide such a sanding machine.
SUMMARY OF THE INVENTION
This object is achieved with a sanding machine according to the preamble of the main claim, wherein the second part can be replaced by a third part to be arranged releasably adjacently of the first part. This third part can be used as additional sanding surface, but also as a base for another tool.
According to a first preferred embodiment the third part therefore has a shape different from that of the second part.
This provides the possibility of adapting the shape of the sanding sole or the other tool to the desired use.
According to a special preferred embodiment the second part is provided with a tool for performing an operation other than sanding.
This embodiment makes it possible to make use of the drive of the sanding machine to perform a second type of operation.
The tool is preferably a chisel.
According to another preferred embodiment the bottom surface of both parts lies in the same plane.
A single sanding surface is hereby obtained, the shape of which can be adapted.
According to another preferred embodiment the first, the second and the third part of the sanding sole all have a rigid layer and a layer arranged thereunder which is compressible in the thickness direction, the drive means engage on the rigid layer of the first part, and the rigid layer of the second and the third part of the sanding sole can be connected to the rigid layer of the first part of the sanding sole by means of at least one locking connection.
This measure provides the option in the configuration according to the present invention of also making use of a sanding sole provided with a layer which is compressible in the thickness direction. With these measures it is possible to form a firm connection between the first part and the second respectively the third part of the sanding sole, so that the second respectively third part of the sanding sole are also driven together with the first part, while the abrasive material performing the sanding action is connected to the rigid part of the sanding sole via a layer of material compressible in the thickness direction.
According to another preferred embodiment the rigid layer of the second and the third part of the sanding sole can be connected to the rigid layer of the first part of the sanding sole by means of at least one hook connection and at least one locking connection.
This construction results in a connection engaging at least at two points between the first part and the second part respectively the third part of the sanding sole, while the locking connection enables an easy release.
The same advantage, although to an even further extent, results when the rigid layer of the second and the third part of the sanding sole is connected to the rigid layer of the first part of the sanding sole by means of two hook connections and a locking connection, and the movable lock of the locking connection is connected to the first part of the sanding sole.
According to another preferred embodiment the layer compressible in its thickness direction of at least the first part of the sanding sole is releasably connected to the rigid layer of the sanding sole.
This measure provides the possibility of replacing the compressible part of the sanding sole, for instance after wear.
The layer compressible in its thickness direction is preferably connected reversibly to the rigid layer of the sanding sole.
The turning over can also be used to move heavily loaded, worn surfaces of the layer to locations less subject to wear.
The compressible layer is preferably connected to the rigid layer of the sanding sole by means of velcro material.
According to yet another preferred embodiment, each of the parts of the sanding sole can be coupled to a substantially fitting sanding element.
A sanding element is understood to mean not only a sheet of sandpaper or sand cloth, but for instance also a thin layer of a material which itself has sanding properties.
This measure enables separate sanding elements to be used for each part of the sanding sole. During use of for instance the first and the second part of the sanding sole it is then possible, if for instance only the sanding element of the second part is worn, to replace only this part of the sanding element.
It will otherwise be apparent that it is likewise possible to use sanding elements which fit as a whole onto the combination of first and second or first and third parts of the sanding sole.
According to yet another preferred embodiment each of the parts of the sanding sole is provided on its underside with fastening means for effecting a releasable attachment between the sanding element and the relevant part of the sanding sole.
This measure results in an easy arrangement and release of the sanding element, without difficult fixing processes having to be performed for this purpose.
The parts of the compressible layer of the sanding sole are preferably provided with a layer of velcro material for attachment to a sanding element.
This results in a simple and inexpensive manner of providing such an attachment.
According to a specific embodiment the velcro material comprises a durable layer and a less durable layer, the sanding sole is provided with the durable layer of the velcro material and the abrasive is provided with the less durable layer of the velcro material.
This offers the advantage of manufacturing the sanding element from the cheapest fastening material; this must after all be replaced frequently.
According to yet another preferred embodiment channels are arranged in the sanding machine for extracting air from the vicinity of the sanding sole, wherein the channels extend through the parts of the sanding sole.
This measure extracts the air and the sanding dust created during sanding at the position where it occurs, so that the sanding system is thus the most effective.
According to yet another embodiment the compressible layers are arranged releasably on the rigid parts.
This provides the advantage that, when a section of the durable part of the velcro connection is worn after repeated replacement of the abrasive material, it can be repositioned, so that a less worn part comes to lie at the position which is subject to the most wear. It is also possible to entirely replace the compressible whole.
According to yet another preferred embodiment the connection between the rigid parts and the compressible layers is obtained by means of velcro mate

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