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US 6,422,495 B1Granted
Rotary grinder apparatus and method
AssigneeVermeer Manufacturing Company
InventorsDuane R. De Boef, Keith Roozeboom, Gary Verhoef
Life of this patent
Estimating the term…
Abstract
A rotary grinder having a cylindrical drum that includes a cylindrical surface. The cylindrical surface defines two holes. The drum receives opposite ends of a through-member at the two holes such that the opposite ends of the through-member comprise hammers when the cylindrical drum is rotated. A single retaining member is used to secure all of the through-members to the drum.
Claims35
A rotary grinder comprising:
- (a) a cylindrical drum rotatable about its axis, the cylindrical drum comprising a cylindrical wall and a first and second end, the cylindrical wall defining a first receiving hole and a second receiving hole, and the cylindrical wall also deforming an interior and an exterior of the cylindrical drum;
- (b) a removable through-member received by the cylindrical wall at both the first and second receiving holes, the through-member comprising:
- (i) a first end that extends to the exterior of the cylindrical drum by passing through the first receiving hole;
- and
- (ii) a second end opposite the first end that extends to the exterior of the cylindrical drum by passing through the second receiving hole;
- and
- (c) removable cutting structures mounted on the first and second ends for securing the through-member to the drum, the cutting structures being configured to prevent radial movement of the through-member relative to the cylindrical drum such that the through-member is prevented from being removed from the drum when both cutting structures are in place.
4 more elements
A rotary grinder comprising:
- a cylindrical hollow drum having an exterior surface and an interior surface, the drum being rotatable about a longitudinal axis of the drum and the drum defining a plurality of openings that extend through the drum between the interior and exterior surfaces;
- a plurality of through-members that pass through the cylindrical drum, each through-member including a first end positioned opposite from a second end;
- grinding portions positioned at the first and second ends of each through-member, the grinding portions being configured to extend radially beyond the exterior surface of the cylindrical drum through the openings in the drum;
- and
- guides for slidably receiving the through-members, the guides extending radially within the drum between the openings of the drum, the guides being fixedly connected with the drum and being configured to guide the through-members through the drum during assembly.
2 more elements
A rotary grinder comprising:
- a hollow, cylindrical drum having an interior surface and an exterior surface, the drum being rotatable about a longitudinal axis of the drum, and the drum defining a plurality of openings that extend through the drum between the interior and exterior surfaces;
- a plurality of grinding members, each grinding member having a first end that extends through one of the openings defined by the drum and a second end that extends through another of the openings defined by the drum;
- and
- a retaining member that extends longitudinally through the drum for securing the grinding members to the drum, the retaining member being removable from the grinding members to allow the grinding members to be removed from the drum.
1 more element
A rotary grinder comprising:
- a plurality of grinding members rotatable about an axis of rotation, each of the grinding members intersecting the axis of rotation at an oblique angle and including first and second ends on opposite sides of the axis of rotation, the first and second ends of each grinding member being positioned to define separate cutting paths as the grinding members are rotated about the axis of rotation;
- and
- a hollow drum aligned along the axis of rotation, the drum defining pairs of first and second openings, the grinding members passing radially through the drum and including first ends that extend through the first openings and second ends that extend through the second openings;
- and
- a retaining member that extends longitudinally through the drum and extends through co-axially aligned openings defined by the grinding members.
2 more elements
Dependencies are inferred from the claim text.