Information recording apparatus with a non-newtonian liquid bearing
First Claim
1. An information storage system comprising:
- a substantially rigid rotatable storage medium having a magnetic data surface;
means for rotating the rotatable storage medium;
a magnetic transducer means;
means for maintaining a film of a non-Newtonian fluid on the magnetic data surface by applying the fluid to the magnetic data surface during rotation of the storage medium, the magnetic transducer means being supported adjacent to the magnetic data surface during rotation of the storage medium, by the film of the fluid.
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Accused Products
Abstract
An information storage apparatus is disclosed for reading and/or writing information on a rigid disk, which includes a non-Newtonian liquid bearing interface between a transducer and a storage medium, instead of a conventional air or Newtonian liquid bearing. The non-Newtonian liquid has a composition which exhibits plastic or pseudoplastic flow at high rates of shear. Preferably, the liquid is of the class of compounds whose viscosity shows a negative dependence on share rate. Thus, as the relative speed of the transducer and the storage medium increases, while their relative spacing decreases, the increasing shear rate to which the liquid bearing is subjected causes the viscosity of the liquid to reduce. Resultantly, very low flying heights can be achieved, which increases the potential storage density on the storage medium, while the reduced drag exerted on the transducer by the lowered viscosity greatly reduces the power required to rotate the medium.
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Citations
20 Claims
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1. An information storage system comprising:
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a substantially rigid rotatable storage medium having a magnetic data surface; means for rotating the rotatable storage medium; a magnetic transducer means; means for maintaining a film of a non-Newtonian fluid on the magnetic data surface by applying the fluid to the magnetic data surface during rotation of the storage medium, the magnetic transducer means being supported adjacent to the magnetic data surface during rotation of the storage medium, by the film of the fluid. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An information storage system comprising:
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a substantially rigid rotatable storage medium having a magnetic data surface; means for rotating the rotatable storage medium; a magnetic transducer means; and a non-Newtonian fluid; wherein the rotatable storage medium and the magnetic transducer means are immersed in the non-Newtonian fluid. - View Dependent Claims (13, 14, 15)
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16. An information storage system comprising:
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a substantially rigid rotatable storage medium having a magnetic data surface mounted on a spindle; a spindle rotator for rotating the spindle and mounted rotatable storage medium; a transducer; wicking material for maintaining a film of a non-Newtonian fluid on the magnetic data surface by applying the non-Newtonian fluid to the magnetic data surface during rotation of the storage medium, the magnetic transducer being supported adjacent to the magnetic data surface during rotation of the storage medium, by the film of the non-Newtonian fluid. - View Dependent Claims (17, 18, 19, 20)
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Specification