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AssigneeElectric Boat Corporation
InventorsCarl O. Larson, Jr., James S. Smith, John H. Chapman, Scot A. Slimon, John D. Trahan, Robert J. Brozek, Alberto Franco, John J. McGarvey, Marvin E. Rosen, Michael K. Pasque
Estimating the term…
In one embodiment described in the specification, a surgically implantable reciprocating pump employs a check valve as the piston, which is driven by a permanent magnet linear electric motor to assist either side of the natural heart. The pump is implanted in the aorta or pulmonary artery using vascular attachment cuffs such as flexible cuffs for suturing at each end with the pump output directly in line with the artery. The pump is powered by surgically implanted rechargeable batteries. In another embodiment, pairs of pumps are provided to replace or assist the natural heart or to provide temporary blood flow throughout the body, for example, during operations to correct problems with the natural heart.
A linear motor comprising a hollow cylinder, an array of axially spaced coil windings supported by the cylinder, a permanent magnet arrangement having axially spaced magnet poles producing a radially directed magnetic flux which cooperates with the axially spaced coil windings, the permanent magnet arrangement positioned within the cylinder for reciprocal movement therein in response to sequential energization of the coil windings and control means for sequentially energizing the coil windings adjacent to the poles such that the current flows through coil windings adjacent to opposite poles in opposite directions causing the permanent magnet arrangement to be drawn toward the energized windings to provide work output when the permanent magnet arrangement is approached by the pattern of sequentially energized windings from either direction.
Dependencies are inferred from the claim text.