|
(11) | EP 1 541 782 B1 |
| (12) | EUROPEAN PATENT SPECIFICATION |
|
|
| (54) |
Floor stripping blade Schneidwerkzeug zum Entfernen von Fussboden Lame d'arrachage de sols |
|
|
||||||||||||||||||||||||||||
| Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention). |
Background of the Invention
Field of the Invention
[0001] This invention relates to blades for carpet and tile floor stripping machines and more particularly to an angled carbide tipped blade.
Description of the Related Art
[0002] There are many types of floor stripping machines. In one type the blades engaging the floor are angled downward and have a large force pushing down on the blade so that it engages the floor at an angle and strips the ceramic tiles, carpet, tile, adhesives and other material from the floor. The blade tips dull quickly and have to be changed frequently.
[0003] Another type of floor stripping machine has a blade resting on the floor like a plow with a pushing force applied behind the blade parallel to the floor. However it is difficult to keep the blade flat on the floor and the blade will ride up over the material to be stripped.
[0004] A further type of stripping machine, representing the closest prior art, is described in US 4,860,450 which can strip walls and floor coverings. It comprises a casing, including an electric motor attached to a gearbox, and a circular disc blade having one or more cutting edges at its periphery. To increase longevity and wear of the blade, the cutting edge may be faced with carbide. The blade is generally concave in profile and has sufficient flexibility to allow the blade to flex when pressed against the surface to be stripped. The machine relies upon pressure exerted by the operator in use to present the blade to the surface at the right angle.
Summary of the Invention
[0005] The invention is defined in claim 1. Preferred embodiments are defined in the appended claims. As disclosed herein, an angled stripper blade has a shoe portion for riding on the floor and having the weight of the machine on it for engaging the floor. A blade on the from portion of the shoe is held parallel to the floor for skiving the ceramic tiles, carpet, tile, adhesive or other material from the floor surface. The blade angle relative to the floor is optimized for stripping the floor. The carbide tip on the shoe is stronger and last longer than a metal blade and can be changed easily when the tip gets dull.
Objects of the Invention
[0006] It is an object of the invention to quickly and easily strip a floor of ceramic tiles, carpet, tile, adhesives and other materials.
[0007] It is an object of the invention to provide a blade tip, which lasts longer without becoming dull.
[0009] It is an object of the invention to provide an angled blade with weight on the blade to keep the blade parallel to the floor.
Brief Description of the Drawings
[0013] The figure shows a blade 16 having a carbide insert 10 for engaging ceramic tiles or other material to be removed from a floor. The blade 16 has a flat bottom portion 12 for riding on the floor and holding the blade parallel to the surface of the floor. The head of the blade 15 is attached to the top of blade 16 and has a shank 18 attached at an angle which is on the order of 22 degrees from the floor such that the weight of the stripper machine can be used to push down on the blade 12 and keep the blade on the floor such that the carbide insert 10 can skive the unwanted material from the floor.
[0014] The shank 18 has an aperture 20 for attaching the shank to the stripper machine such that the weight of the machine rests on the surface 12 of blade 16. The angle of the shank in the figure is 22 degrees which is favorable for extending the blade out in front of the machine while placing the weight of the stripper machine on the back portion of the blade 16. The front portion of the blade 16 with the carbide insert 10 has the weight of the machine behind it for pushing on the material to be removed.
[0015] The carbide insert 10 has a tip angled at 45 degrees which has been found to be an angle which is efficient for skiving material from floors. The blade angle above the insert is 20 degrees to allow the material scraped from the floor to be lifted up easily.
[0016] The blade 16 can be of any width. The narrower the blade width the easier it is to push along the floor to skive material therefrom but then more passes need to be made to remove all the material from the floor.
[0017] Although the carbide insert is shown with a cutting angle of 45 degrees other angles may be used depending on the type of material to be removed from the floor. Similarly the 20 degree angle on the top of the blade 16 can be changed to fit the job to be accomplished.
[0018] The shank 18 angle of 22 degrees can also be varied depending on the design and weight of the stripper machine and the flooring to be stripped. For example, in one preferred aspect, the shank angle lies between 5 degrees and 45 degrees. In another preferred aspect, the shank angle lies in an optimum range between about 17 degrees and 22 degrees.
a blade (16) having a flat bottom surface (12);
a carbide insert (10) attached to the blade;
a blade head (15) attached to the blade; and
a blade shank (18) attached to the blade head (15) for connecting the floor stripping blade to a floor stripping machine at an angle such that the weight of the floor stripping machine rests on the flat bottom surface (12) of the blade (16) resting on the floor in front of the floor stripping machine, characterised in that the carbide insert (10) can be changed.
the carbide insert (10) has a leading cutting edge making an angle of substantially 45 degrees with respect to the surface of the floor.
the shank (18) is angled at substantially 22 degrees with respect to the floor.
the angle of the blade (16) adjacent the carbide insert (10) is substantially 20 degrees.
the blade head (15) is on the rear portion of the blade (16).
the carbide insert (10) is on the front portion of the blade (16).
einen Hartmetalleinsatz (10), der an der Klinge befestigt ist,
einen Schneidwerkzeugkopf (15), der an der Klinge befestigt ist, und
einen Schneidwerkzeugstiel (18), der am Schneidwerkzeugkopf (15) befestigt ist, um das Schneidwerkzeug zum Entfernen von Fußboden mit einer Fußbodenablösemaschine in einem derartigen Winkel zu verbinden, dass das Gewicht der Fußbodenablösemaschine auf der ebenen bodenseitigen Fläche (12) der Klinge (16) liegt, die auf dem Fußboden vor der Fußbodenablösemaschine aufliegt, dadurch gekennzeichnet, dass der Hartmetalleinsatz (10) ausgewechselt werden kann.
une lame (16) dotée d'une surface inférieure plate (12) ;
une pastille de carbure (10) fixée sur la lame ;
une tête (15) de lame fixée sur la lame ; et
une tige (18) de lame fixée sur la tête (15) de lame pour raccorder la lame d'arrachage de sol à une machine d'arrachage de sol selon un angle de sorte que le poids de la machine d'arrachage de sol repose sur la surface inférieure plate (12) de la lame (16) reposant sur le sol en face de la machine d'arrachage de sol, caractérisée en ce que la pastille de carbure (10) peut être changée.
la pastille de carbure (10) a un bord de coupe d'attaque faisant un angle sensiblement de 45 degrés par rapport à la surface du sol.
la tige (18) est coudée sensiblement à 22 degrés par rapport au sol.
l'angle de la lame (16) adjacente à la pastille de carbure (10) est sensiblement de 20 degrés.
la tête (15) de lame est sur la partie arrière de la lame (16).
la pastille de carbure (10) est sur la partie avant de la lame (16).