Patent ID: 11951663
Assignee: DME COMPANY LLC
Field: Other special machines (Mechanical engineering)
Classification: CPC B | IPC B

Claim 10:
11. A ball screw centering device comprising:
a center bearing housing to be connected to a center mold block;
a rotatable shaft extending through a channel of the center bearing housing and rotatably mounted to the center bearing housing, the rotatable shaft having a first side ball track and a second side ball track;
a first nut to be coupled to a stationary mold block, the first nut including a track portion cooperating with the first side ball track to define a passage for a first set of ball bearings to traverse;
a second nut to be coupled to a distal mold block, the second nut including a track portion cooperating with the second side ball track to define a passage for a second set of ball bearings to traverse;
a first nut housing to be fixed to a stationary mold block; and
a first sleeve to be connected to and extendable between the center bearing housing and the first nut housing to circumscribe an exposed portion of the first side ball track and an exposed portion of the first nut between the center bearing housing and the first nut housing, the first sleeve being positionable between an unexpanded position and an expanded position.