Method of manufacturing a centrifuge rotor

Claim 1

A method of manufacturing a centrifuge rotor for use as part of a rotating centrifuge comprising taking a cover configured in the shape of an intermediate layer of said rotor and defining a plurality of perforations therein, winding an outermost layer in the form of wire material about the intermediate layer, rotating said cover while simultaneously pouring a relatively chemically resistant filler material in a liquid state into said cover at a predetermined speed and in such manner to cause a portion of the filler material to flow through the perforations defined by said intermediate layer and adhere to portions of the wire material forming said outermost layer, continuing said rotation of said cover until the filler material is at least partially solidified to form an inner layer of the centrifuge rotor, and finishing the surfaces of said outermost and innermost layers to form said rotor.

Claim 2

A method of manufacturing a centrifuge rotor for use as part of a rotating centrifuge comprising taking a cover configured in the shape of an intermediate layer of said rotor and defining a plurality of perforations therein, winding an outermost layer in the form of wire material about the intermediate layer, rotating said cover while simultaneously pouring a relatively chemically resistant filler material in a liquid state into said cover at a predetermined speed and in such manner to cause a portion of the filler material to flow through the perforations defined by said intermediate layer and adhere to portions of the wire material forming said outermost layer, continuing said rotation of said cover until the filler material is at least partially solidified to form an inner layer of the centrifuge rotor, and finishing the surfaces of said outermost and innermost layers to form said rotor.

Claim 4

A method of manufacturing a centrifuge rotor for use as part of a rotating centrifuge comprising taking a metal cover having a predetermined configuration in the shape of an outermost layer of the rotor, preheating said metal cover, pouring a relatively chemically resistant filler material in a liquid state into said cover in a predetermined quantity less than the total quantity of said liquid filler material required, simultaneously rotating said cover in a given direction and at a predetermined rotational speed sufficient to place the cover in a stressed condition by outwardly directed bias forces which cause the filler material to compressively adhere to the inner surface of said cover while eliminating imperfections in the adhesion surface of said filler material, continuing said rotation of said cover in said given direction until the filler material is at least partially solidified to form an inner layer of said centrifuge rotor, continuing to pour intermittently, said liquid filler material into said rotating cover in predetermined quantities less than the total quantity of liquid filler material required, each quantity being permitted to at least partially solidify before pouring the next quantity of said liquid filler material, reversing the rotation of said cover as it is associated with the pouring of each quantity of liquid filler material so as to obtain a plurality of layers of filler material with each layer being formed in relation to a cover rotation opposite to that of the next adjacent layer, cooling said metal cover sufficient to cause the metal to shrink in excess of the shrinkage of the filler material so as to create bias forces against the innermost filler material layer capable of off-setting at least a portion of the centrifugal forces to which said centrifuge rotor is subjected during normal operation as part of a centrifuge, and finishing the surfaces of said outermost and inner layers to form said rotor.

Claim 5

A method of manufacturing a centrifuge rotor for use as part of a rotating centrifuge comprising taking a metal cover having a predetermined configuration in the shape of an outermost layer of the rotor, preheating said metal cover, pouring a relatively chemically resistant filler material in a liquid state into said cover in a predetermined quantity less than the total quantity of said liquid filler material required, simultaneously rotating said cover in a given direction and at a predetermined rotational speed sufficient to place the cover in a stressed condition by outwardly directed bias forces which cause the filler material to compressively adhere to the inner surface of said cover while eliminating imperfections in the adhesion surface of said filler material, continuing said rotation of said cover in said given direction until the filler material is at least partially solidified to form an inner layer of said centrifuge rotor, continuing to pour intermittently, said liquid filler material into said rotating cover in predetermined quantities less than the total quantity of liquid filler material required, each quantity being permitted to at least partially solidify before pouring the next quantity of said liquid filler material, reversing the rotation of said cover as it is associated with the pouring of each quantity of liquid filler material so as to obtain a plurality of layers of filler material with each layer being formed in relation to a cover rotation opposite to that of the next adjacent layer, cooling said metal cover sufficient to cause the metal to shrink in excess of the shrinkage of the filler material so as to create bias forces against the innermost filler material layer capable of off-setting at least a portion of the centrifugal forces to which said centrifuge rotor is subjected during normal operation as part of a centrifuge, and finishing the surfaces of said outermost and inner layers to form said rotor.