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US 2020/0399841 A1Published application
Milling cutting element system
OwnerWinchester E. Lathaminventor
Life of this patent
Estimating the term…
Abstract
A cylindrical cutting system, a bit holder assembly, and machine for milling or scarifying road surfaces are disclosed. A bit holder is attachable to a milling platform, and includes an inward facing surface for engaging a corresponding mating surface of the milling platform. The inward facing surface of the bit holder and the mating surface include aligning fastener and pin openings. A fastener and a pin are inserted within the respective openings to couple the bit holder to the milling platform. The mating surface may define a part of a recess formed in the milling platform. A wear element may be disposed at the leading side of the bit holder. Multiple platforms may be coupled together with axially extended platform fasteners.
Claims20
A cutting system comprising:
- a bit holder comprising a cutting tool holder portion extending away from a mounting portion, the bit holder having a leading edge, a lagging edge opposite the leading edge, an upper surface, a lower surface opposite the upper surface, and a pair of lateral surfaces together defining an outer surface of the bit holder;
- a milling platform having a circumferential outer surface and being rotatable about an axis, the milling platform including opposing lateral surfaces extending radially outward away from the axis to the circumferential outer surface, the milling platform formed to include a plurality of recessed mounting surfaces sequentially formed in the circumferential outer surface, each of the recessed mounting surfaces defined by a leading recess edge interconnected by a bottom mating surface with a lagging recessed edge, the bottom mating surface extending to the opposing lateral surfaces, wherein the leading recess edge, the lagging recessed edge, and the bottom mating surface are planar surfaces;
- the bit holder positioned in a corresponding recessed mounting surface to align the leading and lagging edges of the bit holder with respective leading and lagging recessed edges of the corresponding recessed mounting surface and to align the lower surface with bottom mating surface;
- the bit holder comprising a pin bit holder opening in the lower surface and a fastener bit holder opening in the lower surface, the pin bit holder opening aligned with a pin base opening in the bottom mating surface, and the fastener bit holder opening aligned with a fastener base opening in the bottom mating surface;
- and
- a fastener engaged with the fastener bit holder opening and the fastener base opening so as to extend from the upper surface through fastener bit holder opening and extend into the fastener base opening to maintain the lower surface of the bit holder in contiguous contact with the bottom mating surface;
- and
- a pin contiguously engaged with pin bit holder opening and with the pin base opening to maintain alignment of the bit holder on the milling platform in a cutting direction.
5 more elements
A cutting system, comprising:
- a milling platform rotatable about an axis, the milling platform including a circumferential outer surface defined about the axis, and a mating surface on the outer surface, the mating surface including a fastener base opening and a pin base opening;
- a bit holder having a leading edge and a lagging edge opposite the leading edge;
- the bit holder having a radially inward facing surface engaging the corresponding mating surface of the milling platform, the radially inward facing surface including a fastener bit holder opening in alignment with the corresponding fastener base opening of the milling platform to receive a fastener, and a pin bit holder opening in alignment with the corresponding pin base opening of the milling platform to receive a pin, wherein the fastener and the pin removably couple the bit holder to the milling platform;
- a cutter bit coupled with the bit holder and disposed radially outward from the radially inward facing surface;
- and
- a wear element coupled to the bit holder or the outer surface of the milling platform and positioned adjacent to the leading edge of the bit holder;
- wherein the bit holder includes a mounting portion through which the fastener bit holder opening extends, and a cutting tool holder portion extending away from the mounting portion and in closer proximity to a lagging edge of the bit holder than the mounting portion, the cutting tool holder portion including the cutter bit.
4 more elements
A cutting system, comprising:
- a plurality of bit holders configured to be positioned on a circumferential outer surface of each of a plurality of milling platforms rotatable about an axis, each of the bit holders comprising a radially inward facing surface for engagement with a corresponding mating surface of a respective milling platform, the radially inward facing surface including a fastener bit holder opening in alignment with a corresponding fastener base opening formed in the mating surface of the respective milling platform to receive a fastener, and a pin bit holder opening in alignment with a corresponding pin base opening formed in the mating surface of the respective milling platform to receive a pin, wherein the fastener and the pin removably couple the bit holder to the milling platform;
- each of the bit holders further comprising:
- a leading edge, a lagging edge opposite to the leading edge, an upper surface opposite the radially inward facing surface, and a pair of lateral surfaces together defining an outer surface of a bit holder body;
- wherein the fastener bit holder opening is formed in the bit holder body to extend from the radially inward facing surface through the upper surface;
- wherein the pin bit holder opening is formed in the bit holder body to extend from the radially inward facing surface partially through the bit holder body toward the upper surface, or entirely through the bit holder body to the upper surface;
- wherein the pin bit holder opening and the fastener bit holder opening are positioned on the bit holder body between the leading edge, the lagging edge and the pair of lateral surfaces;
- a cutting tool holder portion extending away from the upper surface;
- and
- a cutter bit coupled to the cutting tool holder portion;
- and
- a wear element removably coupled to the bit holder body and disposed in closer proximity to the leading edge than the cutter bit.
8 more elements
Dependencies are inferred from the claim text.