Disc cutting units for use on rock boring machines
Patent 4004645 Issued on January 25, 1977. Estimated Expiration Date: 
January 25, 1994. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
January 25, 1994. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 1143275 1691623 3041055 3596724 3791465 InventorsApplicationNo. 598167 filed on 07/22/1975US Classes:175/373, Disk cutter175/426InsertExaminersPrimary: Purser, Ernest R.Assistant: Favreau, Richard E. Attorney, Agent or FirmForeign Application Priority Data1974-07-31 ZAAbstractA rock boring machine of the kind consisting of a rotatable headplate on the front face of which is mounted a plurality of rotatable disc cutters, each disc cutter comprising an annular body, a plurality of cutting segments located on and substantially encircling the annular body around the periphery thereof, and removable clamping means for securing the cutting segments to the annular body. Each cutting segment is provided with a suitable formation adapted to engage with a complemental formation on the annular body to prevent peripheral movement of the segments around the annular body. | |
