Abrading – Frame or mount – Portable abrader
Patent
1996-10-21
1999-09-07
Rachuba, M.
Abrading
Frame or mount
Portable abrader
451541, 83835, 8369841, B24B 2300
Patent
active
059478055
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD OF THE INVENTION
This invention relates to the field of disc-shaped cutting, rotating tools of the type having manufactured edges or teeth, which tools may be used for shaping and forming materials, and in particular this invention relates to accessories for angle grinders, such as cutting blades which are adapted for use with a hand-held angle grinder.
BACKGROUND
A number of applications in the construction or repair of solid articles involve the selective removal of material from a bulk in order to produce a desired conformation or shape. For example a builder may remove some wood from a beam in order to produce a neat fit--more likely if the house being built is non-rectangular; a foundry removes surplus metal from sprues or joints between mould parts when producing a casting; a wood carver selectively removes wood in order to produce a carving; a panel beater frequently removes surplus plastic filler which was placed within a defect in an automotive panel to build it up, so that the outline conforms with the original outline of the panel; or a boat builder may have to remove kilograms of material, such as lead-filled fibreglass when shaping or repairing a hull.
The act of selective removal, particularly if carried out by abrasive means, involves the expenditure of considerable effort and abrasive materials. The work can be quite slow. There is also a number of problems and health risks associated with the consequent fine dust, having potentially toxic, carcinogenic, or explosive properties. Moreover, dust containing glass fibre is particularly dangerous to the lungs.
It is an aim of the present invention to provide an improved rotatable cutter for selective removal of solid material, or to at least provide the public with a useful choice.
STATEMENT OF THE INVENTION
In a first aspect the invention comprises an accessory for a grinder including a rotatable tool having a shape substantially that of a disk, having an axis of rotation and capable of being mounted on an arbor of an angle grinder, characterised in that the rotatable tool is provided with a working zone extending inwardly from the perimeter of the tool; and rest means extending substantially inwardly from the working zone of the tool, which rest means is displaced from the working zone along the line of the axis of rotation.
In a related aspect the invention comprises an accessory for a grinder characterised in that the rest means is concentric with and supported on the rotatable tool.
In a related aspect the invention comprises an accessory for a grinder characterised in that the rest means comprises a portion of a convex working surface of the rotatable tool and the rest means includes at least one rubbing surface located between the active zone and the axis of rotation.
In a related aspect the invention comprises an accessory for a grinder characterised in that the rest means comprises a fixed rubbing surface or nose supported on the angle grinder and displaced so as to be supported beyond the rotatable tool. (By "beyond" we mean beyond the end of the arbor, or below the tool as it is normally held).
In a related aspect the invention comprises an accessory for a grinder characterised in that the working zone comprises at least one area within a permitted surface of the rotatable tool, said permitted surface extending inwardly over the working surface from the perimeter over substantially a first third of the radius.
In a related aspect the invention comprises an accessory for a grinder characterised in that the working zone of the rotatable tool is provided with at least one cutting tooth; each cutting tooth has at least one cutting edge lying in a plane substantially coplanar with the radially adjacent surface of the tool; and each cutting tooth projects from the radially adjacent surface of the tool by a height of up to 3 per cent of the diameter, so that the depth of cut of each tooth is limited.
In a related aspect the invention comprises an accessory for a grinder characterised in that each cutting tooth is addit
REFERENCES:
patent: 877146 (1908-01-01), Ward
patent: 1736560 (1929-11-01), Walker
patent: 1861218 (1932-05-01), Huther
patent: 1871674 (1932-08-01), Ellithorpe
patent: 1951105 (1934-03-01), Myers
patent: 3375617 (1968-04-01), Kaufman et al.
patent: 4033077 (1977-07-01), Chester et al.
patent: 4288187 (1981-09-01), Wanner et al.
patent: 4462381 (1984-07-01), Fushiya et al.
patent: 5317945 (1994-06-01), Waggerman
patent: 5613538 (1997-03-01), Brisson
Bennett David
Norton Company
Rachuba M.
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