Driving arrangement for driving the cutting rolls of a drift advancing machine
Patent 4786112 Issued on November 22, 1988. Estimated Expiration Date: 
July 16, 2007. 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.
July 16, 2007. 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 2758826 3157438 3614162 3773384 Driving arrangement for rotary mining heads of mining machines Continuous mining machine having a boom member with a fixed material dislodging means Cutter drum drive assembly for canted end sections Patent #: 4270803 InventorAssigneeApplicationNo. 07/074060 filed on 07/16/1987US Classes:299/76, Cutter shiftable vertically299/78Vertical cutter tooth orbitExaminersPrimary: Massie, Jerome W.Assistant: Bagnell, David Attorney, Agent or FirmInternational ClassE21D 9/10 (20060101)Foreign Application Priority Data1986-07-23 ATAbstractIn a drift advancing machine cutting rolls are rotatably supported on a centrally arranged pivoted arm. Each cutting roll has a separate drive, each of which comprises a drive motor, a drive shaft and a driven shaft being driven via a bevel gear gearing. The drive shaft is a hollow shaft, within which is accommodated the second drive shaft. | |
