Magnetic actuator with long travel in one direction
Patent 6066998 Issued on May 23, 2000. Estimated Expiration Date: 
September 12, 2016. 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.
September 12, 2016. 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.InventorsApplicationNo. 712852 filed on 09/12/1996US Classes:335/229, With permanent magnet310/13, Fixed and movable wound elements310/14, Solenoid and core type310/15, Reciprocating310/22, Plural armatures310/23, Solenoid and core type310/24, Plural cores335/222, With relatively movable coil and permanent magnet (e.g., D'Arsonval type) position on the cathode ray tube)335/232With plural armaturesExaminersPrimary: Gellner, Michael L.Assistant: Barrera, Ramon M. Attorney, Agent or FirmInternational ClassesF16C 039/00H01F 007/00 H01F 007/08 AbstractAn actuator made up of a plurality of actuator elements is provided which actuator provides long travel in one dimension and short travel in five additional dimensions, with each actuator element providing long travel in the one dimension and short travel in at least two additional dimensions. For preferred embodiments, each actuator element includes a suspension core, the long travel being in one linear dimension and each actuator element providing short travel in two additional linear dimensions and at least one rotary dimension. More particularly, each actuator element includes an electrodynamic drive for providing controlled movement in the first dimension, which drive includes a voice coil mounted in a voice coil gap and at least one elongated high permeability core which is movable in the first dimension with respect to the voice coil; an electromagnetic drive for providing controlled movement in the at least one additional dimension (and in the two additional linear dimensions and at least one rotary dimension for preferred embodiments), which drive includes at least one high permeability suspension core spaced from the at least one elongated core by small gaps and windings for selectively inducing fluxes in the small gaps; and a magnetic source for providing bias flux to both the voice coil gap and the small gaps.Other References
Field of SearchMagnetic bearingLinear Fixed and movable wound elements Solenoid and core type Reciprocating Motion-converting mechanism Plural armatures Solenoid and core type Plural cores With permanent magnet Polarized electromagnet Varying alternating current amplitude responsive With plural armatures With armature-locking means With reversible magnetic flux-type movement (e.g., bistable type) With relatively movable coil and permanent magnet (e.g., D'Arsonval type) position on the cathode ray tube) With relatively movable conductors (e.g., dynamometer) | |
