US 6,912,881 B2 · Security reversible key and locking system

Abstract

The security reversible key with an assigned cylinder (Z) has a blocking groove (BN) with a coded blocking depth (B1, B2, B3), which runs parallel to the axis of the key (x) from the tip of the key to at least the first position (P1) of a row of tumbler pins (A2) on the key. In the assigned cylinder, at least at the rearmost coding position (P1), a pair of tumbler pins corresponding to the blocking groove (BN) with a blocking tumbler pin (BZ) and an extended blocking counter pin (BG) are foreseen, whereby the blocking counter pin (BG) impinges on the cylinder housing (10), if the blocking groove is insufficiently deep and, with this, the complete insertion of a key with an insufficiently deep blocking groove is blocked by the pair of blocking tumbler pins. Simultaneously, the blocking tumbler pin (BZ) with the counter pin (BG) at the position (P1) also serves as coding tumbler pin. In the case of the locking system with security reversible keys for locking installations at least two areas are defined, In a first area (G1) several additional security elements and a blocking code function are provided while, in the second area (G2), a more simple basic coding are foreseen. With the first area (G1), an unequivocal segmentation into independent market areas (M1, M2, M3) is defined and, with this, a world-wide unique locking system with enhanced security and applicability is created.

Claims22

Dependent claims

A security reversible-key with at least three coding pin rows (A1, A2, A3) located on flat sides of the key (S), with an assigned cylinder (Z) with tumbler pin rows of pairs of tumbler pins, said tumbler pin pairs consisting of tumbler pins and counter pins at the positions of the coding pin rows of a given bore pattern, wherein:

the key has a blocking groove (BN) in a coding pin row (A1, A2) that runs parallel to an axis (x) of the key from a tip of the key to at least a first coding position (P1) of the coding pin row on the key,
the blocking groove has a coded blocking depth (B1, B2, B3) and, in the assigned cylinder at least at a rearmost coding position (P1′), a pair of blocking tumbler pins corresponding to the blocking groove (BN) with a blocking tumbler pin (BZ) and an extended blocking counter pin (BG) are received,
wherein a total length (lb) of the blocking tumbler pin (BZ) and the blocking counter pin (BG) is almost equal to a distance (db) from the blocking groove (BN) to a cylinder housing (10),
so that the blocking counter pin impinges on the cylinder housing (10) if the blocking groove is not deep enough and complete insertion of a key with an insufficiently deep blocking groove is blocked by the pair of blocking tumbler pins and whereby the blocking tumbler pin (BZ) together with the blocking counter pin (BG), following insertion of the key at the first coding position (P1) on the key, is also utilized as a coding tumbler pin with coding steps (C1, C2, C3, C4) for turning of the cylinder.

1 more element

A locking system with security reversible keys with at least three coding pin rows (A1, A2, A3), which are also located on flat sides of the keys (S), with assigned cylinders (Z) with tumbler pin rows of pairs of tumbler pins, said tumbler pin pairs consisting of tumbler pins and counter pins at the positions of the coding pin rows of a given bore pattern and with at least two additional security elements, wherein at least two areas on the keys are defined such that, in a first area (G1), at least two additional security elements with a higher degree of manufacturing difficulty are provided and, in the second area (G2), a more simple basic coding (Cod1) is provided, and wherein, with the first area (G1) an unequivocal segmentation into independent market areas (Ml, M2, . . . ) is defined whereby the first area (G1) has, as an additional security element, a blocking code (BC),

the keys have a blocking groove (BN) in a coding pin row that runs parallel to an axis (x) of the key from a tip of the key to at least a first coding position (P1) of the coding pin row on the key,
the blocking groove has a coded blocking depth (B1, B2, B3), and,
in the assigned cylinder at least at the rearmost coding position (P1′), a pair of blocking tumbler pins with a blocking tumbler pin (BZ) and an extended blocking counter pin (BG) corresponding to the blocking groove (BN) are provided,
wherein a total length (lb) of the blocking tumbler pin (BZ) and the blocking counter pin (BG) is almost equal to a distance (db) from the blocking groove (BN) to a cylinder housing (10),
such that the blocking counter pin (BG) impinges on the cylinder housing (10) if the blocking groove is not deep enough to thereby block complete insertion of a key with an insufficiently deep blocking groove by the pair of blocking tumbler pins, and whereby the blocking tumbler pin (BZ) with the blocking counter pin (BG), after insertion of the key at the first coding position (P1) on the key, is also utilized as a coding tumbler pin with coding steps (C1, C2, C3, C4) for turning of the cylinder.

2 more elements

Dependencies are inferred from the claim text.

Security reversible key and locking system

Life of this patent

Security reversible key and locking system

Life of this patent

Abstract

Claims22