Reversible motor with axially moveable rotor

Claim 2

A reversible motor means comprising a stator having an opening means passing therethrough, and a rotor disposed in said opening means, said rotor normally being disposed in one position in axial offset relation with said stator in said opening means thereof when said motor means is in its deenergized condition and being pulled axially into centrally aligned relation in said opening means of said stator when said motor is energized, said rotor having means for maintaining said rotor in said centrally aligned relation when said motor means is energized and driving said rotor in one direction and then is reversed to drive said rotor in the opposite direction without causing said rotor to return to said one position thereof, said rotor having a shaft carrying a plurality of axially aligned disc laminations thereon to form a lamination stack on said shaft, certain of said laminations being relatively thin in cross section and two of the laminations being relatively thick in cross section in relation to said certain laminations to provide said means for maintaining said rotor in said centrally aligned relation, one of said thick laminations being disposed at one end of said lamination stack and the other thick lamination being disposed inboard of the other end of said lamination stack, said rotor having a plurality of circumferentially disposed conductor means passing through all of said laminations of said stack and securing said laminations together.

Claim 3

A reversible motor means as set forth in claim 1 wherein said other end of said lamination stack projects out of said opening means of said stator when said rotor is in said one position thereof.

Claim 4

A reversible motor means as set forth in claim 2 wherein said stator has opposed ends and wherein said ends of said rotor are aligned with said opposed ends of said stator when said rotor is in said centrally aligned relation with said stator.

Claim 5

A reversible motor means as set forth in claim 3 wherein said two thick laminations are axially spaced from each other by some of said thin laminations in said lamination stack.

Claim 6

In combination, a driven device, a reversible motor means for driving said device, said motor means having a stator provided with an opening means passing therethrough, said motor means having a rotor disposed in said opening means, and means operatively associated with said rotor to maintain said rotor in one position thereof that is in axially offset relation in said opening means of said stator when said motor means is in its deenergized condition, said rotor being pulled axially into centrally aligned relation in said opening means of said stator when said motor is energized, said rotor and said driven device having means for coupling said rotor and said driven device together only when said rotor is in said centrally aligned relation with said stator so that said device can be driven by said rotor, said rotor having means for maintaining said rotor in said centrally aligned relation when said motor means is energized and driving said rotor in one direction and then is reversed to drive said rotor in the opposite direction without causing said rotor to return to said one position thereof, said rotor having a shaft carrying a plurality of axially aligned disc laminations thereon to form a lamination stack on said shaft, certain of said laminations being relatively thin in cross section and two of the laminations being relatively thick in cross section in relation to said certain laminations to provide said means for maintaining said rotor in said centrally aligned relation, one of said thick laminations being disposed at one end of said lamination stack and the other thick lamination being disposed inboard of the other end of said lamination stack, said rotor having a plurality of circumferentially disposed conductor means passing through all of said laminations of said stack and securing said laminations together.

Claim 7

In combination, a driven device, a reversible motor means for driving said device, said motor means having a stator provided with an opening means passing therethrough, said motor means having a rotor disposed in said opening means, and means operatively associated with said rotor to maintain said rotor in one position thereof that is in axially offset relation in said opening means of said stator when said motor means is in its deenergized condition, said rotor being pulled axially into centrally aligned relation in said opening means of said stator when said motor is energized, said rotor and said driven device having means for coupling said rotor and said driven device together only when said rotor is in said centrally aligned relation with said stator so that said device can be driven by said rotor, said rotor having means for maintaining said rotor in said centrally aligned relation when said motor means is energized and driving said rotor in one direction and then is reversed to drive said rotor in the opposite direction without causing said rotor to return to said one position thereof, said rotor having a shaft carrying a plurality of axially aligned disc laminations thereon to form a lamination stack on said shaft, certain of said laminations being relatively thin in cross section and two of the laminations being relatively thick in cross section in relation to said certain laminations to provide said means for maintaining said rotor in said centrally aligned relation, one of said thick laminations being disposed at one end of said lamination stack and the other thick lamination being disposed inboard of the other end of said lamination stack, said rotor having a plurality of circumferentially disposed conductor means passing through all of said laminations of said stack and securing said laminations together.

Claim 8

A combination as set forth in claim 5 wherein said other end of said lamination stack projects out of said opening means of said stator when said rotor is in said one position thereof.

Claim 9

A combination as set forth in claim 6 wherein said stator has opposed ends and wherein said ends of said rotor are aligned with said opposed ends of said stator when said rotor is in said centrally aligned relation with said stator.

Claim 10

A combination as set forth in claim 7 wherein said two thick laminations are axially spaced from each other by some of said thin laminations in said lamination stack.