Key or key blank for a disk cylinder and associated disk cylinder

Patent metadata

Field	Value
Publication number	US-10240364-B2
Application number	US-201715664018-A
Country	US
Kind code	B2
Filing date	Jul 31, 2017
Priority date	Aug 1, 2016
Publication date	Mar 26, 2019
Grant date	Mar 26, 2019

Abstract

A key or a key blank for a disk cylinder having a plurality of rotatably supported disk tumblers has a key shaft having a shaft cross-section that comprises a first end section, a second end section and a connection section along a longitudinal axis, the connection section connecting the first end section and the second end section to one another. The connection section is narrower than the two end sections and has two longitudinal edges that are aligned in parallel with one another and that extend obliquely to the longitudinal axis of the shaft cross-section between the two end sections.

First claim

The invention claimed is:

1. A disk cylinder having a key, comprising:
a cylinder housing;
a disk housing rotatably supported about a cylinder axis in the cylinder housing;
at least one blocking pin which is provided at the outer periphery of the disk housing, which is aligned in parallel with the cylinder axis and is displaceable radially to the cylinder axis, which blocks the disk housing against a rotational movement in a radially outer blocking position, and which releases the disk housing for a rotational movement in a radially inner release position; and
a plurality of disk tumblers arranged along the cylinder axis in the disk housing and rotatably supported between a locked position and an unlocked position, with each disk tumbler having a key reception opening and, at the outer periphery, at least one cut-out in which the blocking pin is at least partly receivable in the release position, with the blocking pin only being displaceable into the release position when all the disk tumblers are in their unlocked positions in which the cut-out of the respective disk tumbler is aligned radially to the blocking pin,

wherein the key has a key shaft having a shaft cross-section that has a first end section, a second end section, and a connection section along a longitudinal axis, said connection section connecting the first end section and the second end section to one another, with the first end section and the second end section having a respective encoding region for driving an associated disk tumbler;
wherein the connection section of the shaft cross-section is narrower than the two end sections and has two longitudinal edges that are aligned in parallel with one another and that extend between the two end sections obliquely to the longitudinal axis of the shaft cross-section;
and wherein the connection section of the shaft cross-section comprises a central region that has a square shape, with the square shape:
having two exposed edges which are disposed opposite one another and of which each forms a part of one of the two longitudinal edges of the connection section;
having two corners which are disposed diametrically opposite one another and of which each corresponds to a transition of the connection section to the respective end section of the shaft cross-section; and
having two further edges which are disposed opposite one another, which pass through the connection section, and of which each extends from one of said two corners up to the longitudinal edge of the connection section disposed opposite the respective corner, wherein the key shaft has at least one incision at the respective encoding region of the two end sections of the cross-section, wherein said at least one incision extends across the entire width of the shaft cross-section.

2. The disk cylinder in accordance with claim 1 , wherein each of the two end sections of the shaft cross-section has a first side edge, a second side edge that is disposed opposite the first side edge, an outer edge, and an inner edge that is disposed opposite the outer edge and that extends, starting from the first side edge, to one of said two corners of the square shape of the connection section;
wherein one end of each of the two longitudinal edges of the connection section leads to an end of the inner edge of a respective one of the two end sections of the shaft cross-section to form said respective corner of the square shape; and wherein another end of each of the two longitudinal edges of the connection section leads to the second side edge of the respective other end section of the shaft cross-section.

3. The disk cylinder in accordance with claim 2 , wherein the first side edge and the second side edge of each of the two end sections of the shaft cross-section are aligned at least substantially in parallel with one another and/or are rectilinear.

4. The disk cylinder in accordance with claim 2 , wherein the outer edge of each of the two end sections of the shaft cross-section has the shape of a circular section.

5. The disk cylinder in accordance with claim 2 , wherein the inner edges of the two end sections of the shaft cross-section are at least substantially aligned perpendicular to the longitudinal axis of the shaft cross-section and/or are rectilinear.

6. The disk cylinder in accordance with claim 2 , wherein the shaft cross-section has a respective cut-out at the level of the connection section, said cut-out at least substantially having a triangular shape, with a first limb of the respective triangular shape forming the inner edge of one of the two end sections of the shaft cross-section, and with a second limb of the respective triangular shape forming one of the two longitudinal edges of the connection section.

7. The disk cylinder in accordance with claim 1 , wherein the longitudinal edges of the connection section are rectilinear.

8. The disk cylinder in accordance with claim 1 , wherein the transitions of the connection section to the respective end section of the shaft cross-section which correspond to said two corners of the square shape are rounded.

9. The disk cylinder in accordance with claim 1 , wherein the square shape of the connection section is rotated relative to the longitudinal axis of the shaft cross-section by an angle that has a value in the range from 22° to 32°.

10. The disk cylinder in accordance with claim 1 , wherein said respective transition of the connection section to the respective end section of the shaft cross-section is set back with respect to a side edge of the respective end section by a value of approximately 40% of the maximum width of the shaft cross-section.

11. The disk cylinder in accordance with claim 1 , wherein a mutual spacing of the two longitudinal edges of the connection section of the shaft cross-section amounts to a value in the range from 37% to 47% of the maximum width of the shaft cross-section.

12. The disk cylinder in accordance with claim 1 , wherein the first end section, the connection section and the second end section of the shaft cross-section each extend along approximately a third of the length of the shaft cross-section with respect to the longitudinal axis of the shaft cross-section.

13. The disk cylinder in accordance with claim 1 , wherein the shaft cross-section is point symmetric.

14. The disk cylinder in accordance with claim 1 , wherein the respective encoding region of the two end sections of the shaft cross-section is provided at a respective end face of the shaft cross-section in alignment, when viewed along connection section.

15. The disk cylinder in accordance with claim 1 , wherein the key shaft has at least one incision at the respective encoding region of the two end sections of the shaft cross-section, said incision extending at an angle to the longitudinal axis that has a value in the range from 0° to 90°.

16. The disk cylinder in accordance with claim 1 , wherein the key reception openings of the disk tumblers form a keyway extending along the cylinder axis, with the disk cylinder having at least one securing disk at an insertion opening of the keyway, said at least one securing disk having a key insertion opening having a cross-section that is formed at least substantially in a complementary manner to the shaft cross-section of the key.

17. The disk cylinder in accordance with claim 1 , wherein at least one of the plurality of disk tumblers has a key reception opening having a cross-section that is formed at least substantially in a complementary manner to the shaft cross-section of the key.

18. The d

Assignees

• Bremicker Soehne Kg A

Inventors

• Wehr Michel

Classifications

• E05B21/066

  of the rotary-disc tumbler type (tumblers which are set by inserting the key E05B29/0013) · CPC title

• E05B29/0066

  Side bar locking · CPC title

• E05B21/06

  Cylinder locks, e.g. protector locks · CPC title

• E05B29/0013 Primary

  with rotating plate tumblers (E05B29/0033 takes precedence; plate tumblers which are not set by inserting the key E05B21/06) · CPC title

• E05B19/0041

  characterized by the cross-section of the key blade in a plane perpendicular to the longitudinal axis of the key · CPC title