Air cored, linear induction motor for magnetically levitated systems
Patent 5270593 Issued on December 14, 1993. Estimated Expiration Date: 
November 10, 2012. 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.
November 10, 2012. 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 ReferencesLinear motor Ground vehicle suspension and guidance and electromagnetic system thereof with multiple surface arcuate reaction rails Patent #: 5085149 InventorsApplicationNo. 974177 filed on 11/10/1992US Classes:310/12, Linear104/282, Propulsion means employed to suspend car104/292Propulsion by active guideway; e.g., linear synchronous motor, etc.ExaminersPrimary: Stephan, Steven L.Assistant: Jones, Judson H. Attorney, Agent or FirmForeign Patent References
International ClassesH02K 041/02B60L 013/04 AbstractApparatus for propelling, suspending and guiding a conveyance across ground without contact between said conveyance and said ground, comprising an electromagnetic, air cored induction motor including a primary formed of a coaxial array of coils; means for energizing said coils with polyphase electrical alternating currents to create an electromagnetic wave traveling longitudinally along the array; a secondary formed of a sleeve concentric to and surrounding said array of coils and made of conducting material, said sleeve being electromagnetically coupled to said primary and being cut along a longitudinal generatrix thereof to define a slot permitting the support means which supports the primary to pass there through.Field of SearchLinearSolenoid and core type Fixed and movable wound elements MAGNETICALLY SUSPENDED CAR Propulsion means employed to suspend car By permanent magnets only Including means to sense or control car position or attitude with respect to guideway Propulsion by active guideway; e.g., linear synchronous motor, etc. | |
