Granted Patent B2

US 12,358,106 · App. 17/898,819 · Granted Jul 15, 2025

Inventor: Reto Maeder (Horw, CH)

Assignee: MAKU AG

B25B23/0071B25B23/08

Abstract

Claims (40)

1. A screwdriver attachment for screws, comprising:

a first shaft section with a first longitudinal axis, and

a second shaft section with a second longitudinal axis, which is coupled to the first shaft section via a linking disk,

wherein the first shaft section has a free end with which the screws are able to be turned,

wherein the first shaft section and the second shaft section are connected to one another by a spring element, which aligns the first shaft section in a starting position in which the first longitudinal axis and the second longitudinal axis are aligned coaxially, and

wherein the second shaft section has a back end through which the spring element is inserted.

2. The screwdriver attachment according to claim 1 , wherein the spring element is located within the first and second shaft sections.

3. The screwdriver attachment according to claim 1 , wherein the spring element is in the form of a linear spring rod.

4. The screwdriver attachment according to claim 1 , wherein the linking disk has a central hole passing through it, through which the spring element passes.

5. The screwdriver attachment according to claim 4 , wherein the hole has a greater cross section than that of the spring element, wherein the cross section of the hole is round.

6. The screwdriver attachment according to claim 1 , wherein the spring element is connected to a screw that is threaded into the second shaft section.

7. The screwdriver attachment according to claim 1 , wherein the linking disk has a first tongue on a first side, which engages in a first groove in the first shaft section, and a second tongue on the other side, which engages in a second groove in the second shaft section, wherein the first and second tongues are orthogonal to one another.

8. The screwdriver attachment according to claim 7 , wherein the first and second tongues engage in the first and second shaft sections such that the first and second shaft sections are connected to one another in a form-fitting manner, such that they cannot be pulled apart when subjected to tensile forces along the first and second longitudinal axes.

9. A screwdriver attachment for screws, comprising:

a first shaft section with a first longitudinal axis, and

a second shaft section with a second longitudinal axis, which is coupled to the first shaft section via a linking disk,

wherein the first shaft section has a free end with which the screws are able to be turned,

wherein the first shaft section and the second shaft section are connected to one another by a spring element, which aligns the first shaft section in a starting position in which the first longitudinal axis and the second longitudinal axis are aligned coaxially,

wherein the second shaft section is received in a receiver unit, which has a first fastening ring and a second fastening ring, wherein the first and second fastening rings are spaced apart and located on a clamping sleeve in which the second shaft section is received.

10. The screwdriver attachment according to claim 9 , wherein the second shaft section has a receiver on its back end for receiving a drive shaft.

11. The screwdriver attachment according to claim 9 , wherein the first shaft section has a shaped screwdriver bit with a centering cone surrounding the end thereof.

12. The screwdriver attachment according to claim 9 , wherein the screwdriver bit has one of a polygonal inner profile and a polygonal outer profile.

13. A screwdriver attachment for screws, comprising:

a first shaft section with a first longitudinal axis, and

a second shaft section with a second longitudinal axis, which is coupled to the first shaft section via a linking disk,

wherein the first shaft section has a free end with which the screws can be turned, and

wherein the first shaft section and the second shaft section are connected to one another by a spring element;

wherein said spring element has an end which is configured to substantially remain in alignment with said first longitudinal axis of said first shaft section when an offset between said first shaft section and said second shaft section occurs.

14. The screwdriver attachment according to claim 13 , wherein the spring element provides alignment of the first and second shaft sections at least radially.

15. The screwdriver attachment according to claim 13 , wherein the spring element is in the form of a linear spring rod.

16. The screwdriver attachment of claim 15 , wherein said end of said spring element is seated in a bore of said first shaft section such that said end does not incur radial play within said bore.

17. A screwdriver attachment for screws, comprising:

a first shaft section with a first longitudinal axis, and

a second shaft section with a second longitudinal axis, which is coupled to the first shaft section via a linking disk,

wherein said linking disk compensates for radial offset between said first shaft section and said second shaft section,

wherein the first shaft section has a free end with which the screws can be turned,

wherein said first shaft section applies torque to tighten said screws when said first longitudinal axis of said first shaft section is offset from said second longitudinal axis of said second shaft section;

wherein said first shaft section and said second shaft section are connected together by a spring element which has an end located in a bore of said first shaft section wherein said bore retains said spring element in substantial alignment with said first longitudinal axis when a radial offset occurs between said first shaft section and said second shaft section.

18. The screwdriver attachment according to claim 17 , wherein the spring element is located within the first and second shaft sections.

19. The screwdriver attachment according to claim 17 , wherein the spring element is in the form of a linear spring rod.

Assignments (1)

Priority Claims (1)

Continuity (1)

References Cited (46)