A wheel attachment apparatus for a portable circular saw having a circular blade driven by a motor for cutting a workpiece into a cut-off portion and a remaining portion during a cutting process. The wheel attachment apparatus includes a flat bottom plate attached to the circular saw and to be place
A wheel attachment apparatus for a portable circular saw having a circular blade driven by a motor for cutting a workpiece into a cut-off portion and a remaining portion during a cutting process. The wheel attachment apparatus includes a flat bottom plate attached to the circular saw and to be placed above the working piece to support the circular saw during the cutting process, and having a slot opening to allow the circular blade of the circular saw to pass through for cutting the workpiece under the bottom plate. A set of roller wheels is attached to the bottom plate such that when the circular saw is used to cut the workpiece, the set of wheels is brought into contact with the workpiece and elevates the bottom plate so that there is no contact between the bottom plate and the workpiece and instead the wheels are rolling on the workpiece to reduce any friction between the bottom plate and the workpiece and ease the movement of the circular saw during the cutting process. The wheels are positioned and aligned in a way such that they are all on the same side of the circular blade as the remaining portion of the workpiece so that they are always rolling on the remaining portion of the workpiece to ensure that the circular saw is always firmly supported by the remaining portion throughout the cutting process, even when the cut-off portion becomes lose and separated from the remaining portion of the workpiece.
대표청구항▼
A wheel attachment apparatus for a portable circular saw having a circular blade driven by a motor for cutting a workpiece into a cut-off portion and a remaining portion during a cutting process. The wheel attachment apparatus includes a flat bottom plate attached to the circular saw and to be place
A wheel attachment apparatus for a portable circular saw having a circular blade driven by a motor for cutting a workpiece into a cut-off portion and a remaining portion during a cutting process. The wheel attachment apparatus includes a flat bottom plate attached to the circular saw and to be placed above the working piece to support the circular saw during the cutting process, and having a slot opening to allow the circular blade of the circular saw to pass through for cutting the workpiece under the bottom plate. A set of roller wheels is attached to the bottom plate such that when the circular saw is used to cut the workpiece, the set of wheels is brought into contact with the workpiece and elevates the bottom plate so that there is no contact between the bottom plate and the workpiece and instead the wheels are rolling on the workpiece to reduce any friction between the bottom plate and the workpiece and ease the movement of the circular saw during the cutting process. The wheels are positioned and aligned in a way such that they are all on the same side of the circular blade as the remaining portion of the workpiece so that they are always rolling on the remaining portion of the workpiece to ensure that the circular saw is always firmly supported by the remaining portion throughout the cutting process, even when the cut-off portion becomes lose and separated from the remaining portion of the workpiece. edge located between the outer side of at least one cutter unit and the outer edge of the cutter head so as to be pressable into the skin forwardly of the respective cutter unit, to erect hairs in the skin and to tauten the skin in advance of the respective cutter unit as the cutter head is moved across the skin in the direction from the outer side towards the inner side of the respective cutter unit; said relatively sharp scraper edge not extending to the inner side of the respective cutter unit facing its adjacent cutter unit so as to minimize possible irritation of the skin as the cutter head is moved across the skin. 2. The shaver according to claim 1, wherein said relatively sharp scraper edge is formed in a hard, low-friction material. 3. The shaver according to claim 1, wherein said relatively sharp scraper edge is located on said cutter head such that the relatively sharp scraper edge is pressed into the skin to erect the hairs, and to tauten the skin, by tilting the cutter head with respect to said skin to bring the axis of the cutter head to an oblique angle with respect to said skin. 4. The shaver according to claim 1, wherein each of said cutter units is circumscribed by a skin-engaging surface of said shaving face; said skin engaging surface having an inner side face facing the respective cutter unit, an outer side face facing away from the respective cutter unit, and an outer skin-contact face joining said inner and outer side faces; said relatively sharp scraper edge being formed in the juncture of said outer skin-contact face with said outer side face. 5. The shaver according to claim 4, wherein said relatively sharp scraper edge is defined by a sharp corner at said juncture. 6. The shaver according to claim 4, wherein said relatively sharp scraper edge is defined by an outward extension of said outer skin-contact face at said juncture. 7. The shaver according to claim 4, wherein said skin engaging surface is in the form of a rim circumscribing each cutter unit. 8. The shaver according to claim 7, wherein each of said rims includes an outer face formed with said relatively sharp scraper edge, and an inner face formed with a recess defining a gap with respect to said cutter unit to enhance said tautening of the skin. 9. The shaver according to claim 4, wherein said skin-engaging surface is in the form of a flat table within which all said cutter units are located, said scraper edge being formed in the outer face of said table. 10. The shaver according to claim 1, wherein said relatively sharp scraper edge is formed in said cutter head between the outer edge of the cutter head and two adjacent cutter units, and bridges the space between the two adjacent cutter units. 11. The shaver according to claim 10, wherein said relatively sharp scraper edge is defined by a relatively sharp projection extending over a recess formed in said cutter head between said relatively sharp projection and the outer edge of the holder. 12. The shaver according to claim 11, wherein said cutter head is of a plastic material, and said relatively sharp projection defining said scraper edge is a metal insert seated within said recess. 13. The shaver according to claim 10, wherein said relatively sharp scraper edge is of a linear configuration. 14. The shaver according to claim 10, wherein said cutter head includes three cutter units arranged in a triangular array, and said relatively sharp scraper edge is formed in said cutter head at least along one of the three sides of said triangular array. 15. The shaver according to claim 14, wherein said cutter head includes a relatively sharp scraper edge along each of the three sides of said triangular array. 16. The shaver according to claim 10, wherein said relatively sharp scraper edge is formed in a slanted peripheral margin of the cutter head between said shaving face and the outer edge of the cutter head such that the relatively sharp scraper edge does not contact the skin being shaved dur ing a normal shaving operation when the shaving face of the cutter head is pressed against the skin being shaved, but is brought into contact with the skin to erect the hairs and tauten the skin by tilting the cutter head to bring the axis of the cutter head to an oblique angle with respect to the skin. 17. The shaver according to claim 1, wherein said relatively sharp scraper edge is a low-friction, hard plastic. 18. The shaver according to claim 1, wherein said relatively sharp scraper edge is a low-friction metal. 19. The shaver according to claim 1, wherein said relatively sharp scraper edge is a metal-plated plastic. 20. The shaver according to claim 1, wherein each of said cutter units includes an outer cutter member formed with a plurality of hair-entry slits, and an inner cutter member rotatable within said outer cutter member to cut the hairs received within said hair-entry slits.
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