Twin screw extruder with power branching gearing
Patent 4399719 Issued on August 23, 1983. Estimated Expiration Date: 
March 9, 2001. 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.
March 9, 2001. 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 1728279 2737056 2943507 3657940 3678775 3824875 3916712 Step-down transmission for driving a plurality of extrusion screws Torque splitting gear drive Double screw extruder transmission Patent #: 4315440 InventorsAssigneeApplicationNo. 06/241518 filed on 03/09/1981US Classes:74/410, Pressure distributing74/411, Yieldability in gear trains74/421RSpurExaminersPrimary: Staab, Lawrence J.Assistant: Bednarek, Michael D. Attorney, Agent or FirmInternational ClassesB29C 47/08 (20060101)B30B 11/24 (20060101) B30B 11/22 (20060101) F16H 1/02 (20060101) F16H 1/22 (20060101) Foreign Application Priority Data1980-03-12 DEAbstractEach screw shaft of a twin screw extruder with power branching gearing is driven by a gear train comprising a driven pinion, a first pair of intermediate gears meshing with the driven pinion from opposite sides, a second pair of intermediate gears each meshed with a respective one of the first pair of intermediate gears and a drive pinion meshed on its opposite sides with the second pair of intermediate gears and coupled to a power shaft. The first and second pairs of intermediate gears are capable only of rotation in a gear casing in which they are mounted but the drive pinion and the driven pinion are capable of radial movement in the casing. As shown the driven pinion has an axial extension with curved teeth engaged in one end of a coupling sleeve with internal curved teeth and a portion of the shaft has curved teeth engaged with the curved teeth in the other end of the sleeve, the shaft being mounted in bearings. | |
