Patent ID: 11873686
Assignee: GENERAL DOWNHOLE TOOLS, LTD.
Field: Mechanical elements (Mechanical engineering)
Classification: CPC E  F | IPC E  F

Claim 0:
1. A downhole apparatus, comprising:
an outer body that is cylindrical and comprises an axis and a top coupling that is configured to couple the downhole apparatus to a drill string, and inner grooves formed in an interior of the outer body;
an inner body that is cylindrical and positioned at least partially within the outer body, the inner body has a bottom coupling configured to couple to another portion of the drill string, and outer grooves formed in an exterior of the inner body;
springs positioned within the downhole apparatus and configured to transmit an axial force to a cutting element of the drill string;
balls configured to travel within the inner and outer grooves, with at least some of the balls simultaneously engaging the interior of the outer body and the exterior of the inner body; and
the inner and outer grooves are closed loop grooves, each having groove sections including transitional groove sections, depths of at least one of the groove sections differs from the others to recirculate the balls, and the groove sections are contiguous and uninterrupted so that the balls flow smoothly through them.