Patent ID: 11857238
Assignee: INNOPROD MEDICAL
Field: Medical technology (Instruments)
Classification: CPC A  B | IPC A  B

Claim 5:
6. A screwdriver comprising a ratchet system configured to connect a handle to rod, the ratchet system comprising:
at least one handle comprising a cylindrical distal end extending along a first axis of revolution, said cylindrical distal end comprising a cavity presenting an internal wall with a contact surface;
at least one rod comprising a male distal end extending along a second axis of revolution and a cylindrical proximal end with a connection surface; and
cooperation means including:
at least two grooves positioned on the internal wall of the cavity, each of the at least two grooves comprising a helical portion, one of the ends of which is a flat wall perpendicular to said internal wall and extending from the contact surface towards the proximal end of the at least one handle; and
at least two lugs positioned on the proximal end of the at least one rod;
the at least two lugs each cooperating in only a predetermined rotation direction with one of the at least two grooves until they come into contact with said flat perpendicular wall, said contact allowing the leading, in the predetermined rotation direction of the at least one rod by the at least one handle;

wherein the proximal end of the at least one rod is adapted to cooperate with the distal end of the at least one handle via the cooperating means until abutment contact between the connection surface with the contact surface is established in order to align the first and second axis of revolution, and to lead the at least one rod in a same rotation direction as the predetermined rotation direction of the at least one handle; and
wherein the at least one rod is configured in a way that the at least two lugs separate from said flat perpendicular wall when the at least one handle is rotated in a rotation direction opposite the predetermined rotation direction so that the at least one rod is prevented from driving in the opposite rotation direction, and the at least one rod remains trapped in the cavity, in order to allow driving of the rod in the predetermined rotational direction when the handle is rotated in the predetermined rotation direction.