Rotodynamic pump with spherical motor
Patent 4352646 Issued on October 5, 1982. Estimated Expiration Date: 
February 27, 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.
February 27, 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 3195467 3490379 3649139 3710156 3741690 3762839 3838947 InventorsApplicationNo. 06/238855 filed on 02/27/1981US Classes:417/420Pump magnetically coupled to rotary driveExaminersPrimary: Croyle, Carlton R.Assistant: Look, Edward K. Attorney, Agent or FirmInternational ClassesH02K 7/09 (20060101)H02K 1/12 (20060101) Foreign Application Priority Data1975-01-13 ATAbstractA pump-motor unit of the type having an impeller connected to an armature and where the armature is separated from a stator by an air gap. The armature comprises a magnetic material having sufficient residual flux density whereby when the torque load on the impeller-armature structure is low, the magnet will act as a permanent magnet to provide synchronous rotation of the armature with respect to magnetic flux generated by the stator and when the torque load on the impeller-armature structure is high, will allow magnetic reversal whereby the armature will rotate asynchronously with respect to the magnetic flux generated by the stator.Field of SearchPump magnetically coupled to rotary drive | |
