Claims
- 1. A duplex hammer for use in a drum of a grinder comprising:
a bar with a first and second end adapted to extend through the drum such that both the first and the second ends will be outside the drum when so installed to effectively define first and second cutting surfaces; and an aperture located between the first and second ends adapted to receive a retention pin.
- 2. The duplex hammer of claim 1 wherein the ends are adapted to receive a cutter.
- 3. The duplex hammer of claim 2 wherein the ends are adapted to receive the cutters in a manner that when the cutters are mounted onto the hammers the assembly is retained in the drum.
- 4. The duplex hammer of claim 1 wherein the bar is constructed from a medium to high carbon steel.
- 5. The duplex hammer of claim 4 wherein the bar is constructed from SAE 4140 that is through hardened to a surface harness of Rc 32 minimum.
- 6. The duplex hammer of claim 1 wherein the bar is reversibly mounted in the drum so that both the first and second ends have a leading and trailing face that is dependent on the orientation which they are installed in the drum that can be reversed
- 7. A method for securing a grinding member to a hollow, rotatable drum, the method comprising:
inserting the grinding member radially into the drum; and inserting a retaining member longitudinally through the drum such that the retaining member engages the grinding member to secure the grinding member to the drum.
- 8. The method of claim 7, wherein a plurality of grinding members are inserted radially into the drum, and wherein all of the grinding members are secured to the drum by the retaining member.
- 9. A grinding drum comprising:
a hollow rotatable drum defining an outer drum diameter with an axis of rotation; a hollow sleeve with a first end and a second end extending through the drum substantially perpendicular to and intersecting said axis of rotation such that both the first and second ends extend beyond the outer drum diameter; a hammer supported by said sleeve having a leading and trailing edge; a cutter supported on said hammer and said sleeve wherein the leading edge of said hammer provides tangential support and the sleeve provides radial support.
- 10. The grinding drum of claim 9 further comprising:
a plate supported on the trailing edge of said hammer and engaging said sleeve.
- 11. A grinding apparatus comprising:
a hollow rotatable drum including a cylindrical surface defining an outer diameter of the drum; the drum defining a plurality of separate openings through the cylindrical surface; a plurality of hammers that extend through the openings, the hammers being fixed relative to the drum; cutters mounted on the hammers, the cutters each including first and second cutting edges, the first cutting edge being positioned outside the outer diameter of the drum and the cutter extending toward the drum such that the second cutting edge is positioned at least flush with the outer diameter of the drum.
- 12. A grinding apparatus comprising:
a rotational grinding device including a plurality of cutting elements; a fixed member positioned adjacent an outer diameter of the rotational grinding device, the fixed member including a plurality of valleys positioned between tips, the valleys aligning generally with the cutting elements of the grinding device, the tips being oriented generally perpendicular to a radius of the grinding device.
- 13. The grinding apparatus of claim 12, wherein the cutting elements have cutting edges that are skewed relative to an axis of rotation of the grinding device.
- 14. A grinding apparatus comprising:
a rotational grinding device including a plurality of cutting elements; a stationary grinding member positioned adjacent an outer diameter of the grinding device, the stationary grinding member including a plurality of valleys positioned between tips, the valleys facing toward a direction of rotation of the cutting elements of the cutting device.
- 15. A grinding apparatus comprising:
a rotational grinding device; and a plurality of stationary grinding plates positioned adjacent to an outer diameter of the grinding device, each of the stationary grinding plates including a plurality of tips and valleys.
- 16. The grinding apparatus of claim 15, wherein the stationary grinding plates overlap one another.
- 17. The grinding apparatus of claim 16, wherein screening openings are defined between the stationary plates.
- 18. The grinding apparatus of claim 15, wherein the stationary plates are progressively angles toward vertical.
- 19. The grinding apparatus of claim 17, wherein the screening openings are formed in part by the valleys of the screen.
- 20. The grinding apparatus of claim 15, wherein the plates are positioned consecutively along the outer diameter of the grinding device, and wherein the tips and valleys are located at leading edges of the plates.
- 21. A grinding apparatus comprising:
a hollow rotatable drum including a outer cylindrical surface defining an outer diameter of the drum; the drum defining a plurality of separate openings through the cylindrical surface; a plurality of hammers that extend through the openings, the hammers being fixed relative to the drum; cutters mounted on the hammers, the cutters each including first and second cutting edges, the first cutting edges being positioned outside the outer diameter of the drum and the second cutting edges being recessed within the openings so as to be inside the outer diameter of the drum.
CROSS REFERENCE TO RELATED APPLICATIONS
[0001] The present application is a continuation-in-part of co-pending U.S. patent application Ser. No. 09/513,011 filed Feb. 25, 2000.
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
09513011 |
Feb 2000 |
US |
Child |
10138807 |
May 2002 |
US |