AU2013308060A2

AU2013308060A2 - Blank, security key, lock system, and production method

Info

Publication number: AU2013308060A2
Application number: AU2013308060A
Authority: AU
Inventors: Mirjam CASSANI; Ulrich Kramer
Original assignee: Kaba AG
Current assignee: Dormakaba Schweiz AG
Priority date: 2012-08-29
Filing date: 2013-08-19
Publication date: 2015-04-23
Anticipated expiration: 2033-08-19
Also published as: EP2890856B1; RU2015110124A; EP2890856A1; PL2890856T3; JP6362598B2; CN104769197A; AU2013308060B2; HK1212002A1; ES2627994T3; DK2890856T3; CH707098B1; IL237430A0; SI2890856T1; CN104769197B; MY169395A; HUE035227T2; JP2015526620A; PT2890856T; RU2629737C2; UA114816C2

Abstract

The invention relates to a blank (R) having two parallel lateral grooves RB-SN and a central connecting piece RB-M between said grooves. The lateral grooves run on a higher plane (N1) in an entry region (RB-E) and on a lower plane (N2) in a first coding region (RB-P). A key (S) is produced from the blank, comprising formations consisting of a central groove RB-MN in the entry region and coding recesses (Cod-V) in the coding region on the central connecting piece RB-M. The lateral grooves of the blank and the central groove of the key produce a new composite blank block-code groove = RB-SN + RB-MN. A special tumbler RB-ZH with lateral shoulders RB-ZH-S is paired with the key in the cylinder (Z), the shape of said shoulders matching the lateral grooves RB-SN and the central groove RB-MN such that, together with the special tumbler, an additional insertion block is formed in the entry region and an additional rotational block is formed in the coding region. Thus, the security of the lock system is substantially increased, and forgeries and unauthorized key copies are also prevented.

Description

1 A BLANK, SECURITY KEY, LOCK SYSTEM AND MANUFACTURING METHOD The invention relates to a blank, to a security key and to a lock system with security keys and with assigned cylinders, as well as to a method for manufacturing the security key from a blank, according to the preamble of the independent claims. With regard to lock technology, there exist the basic tasks of firstly preventing the unauthorised replication of keys with better and better means or rendering it more difficult, and on the other hand of increasing the number of possible permutations of a key and thus also the security of the lock systems. A lock system with security turn keys is known from EP 1 185 755 as the closest state of the art, which at the key tip comprise a horizontal blocking groove with a coded blocking depth. A blocking tumbler pin pair, consisting of a standard coding pin (coding tumbler pin) and an extended standard blocking counter pin preventing the complete insertion of a key with a blocking groove which is not deep enough, is attached at the rearmost coding position in the assigned cylinder. This blocking groove coding results in high permutation capacities. Such a horizontal blocking groove however is still not too difficult to copy or replicate. According to the invention there is provided, a blank for manufacturing a security key with at least two coding rows / pin rows on the flat sides of the key for an assigned cylinder with tumbler pins and with counter pins of a lock system with an insertion block, acting in a vertical direction to the key axis, wherein - two parallel lateral grooves and a central projecting part between the lateral grooves, and which are formed parallel to the key axis and symmetrically to the central plane of a coding row / pin row, - wherein the lateral grooves and the central projecting part are extending from the key tip to a coding region of the first coding positions, - and said lateral grooves in an entry region at the key tip running at a high level and in the coding region of the first coding positions running in a sunk manner at a lower level, - wherein the lateral grooves are suitably shaped, in order to correspond to additional lateral shoulders of an associated circularly symmetric special tumbler pin and an extended counter pin at the rearmost coding position of the cylinder, - so that an additional insertion block acting in a vertical direction to the key axis in the entry region and an additional rotation block in the coding region can be carried out by the lateral grooves of the blank and the lateral shoulders of the associated special tumbler pin. 6308424_1 (GHMatters) P99251.AU LYNT la According to the invention there is further provided a security key with at least two coding rows / pin rows on the flat sides of the key for an assigned cylinder with tumbler pins and with counter pins of a lock system with an insertion block, acting in a vertical direction to the key axis, wherein - two parallel lateral grooves and a central groove and a central projecting part between the lateral grooves, and these are formed parallel to the key axis and symmetrically to the central plane of a coding row / pin row, - wherein the lateral grooves and the central groove and the central projecting part are extending from the key tip to a coding region of the first coding positions, - wherein coding recesses are formed at the first coding positions in the region of the central groove in the coding region, - and wherein the lateral grooves in an entry region at the key tip running at a high level and in the coding region of the first coding positions running in a sunk manner at a lower level, - wherein the lateral grooves are suitably shaped, in order to correspond to additional lateral shoulders of an associated circularly symmetric special tumbler pin and an extended counter pin at the rearmost coding position of the cylinder, - so that an additional insertion block acting in a vertical direction to the key axis in the entry region and an additional rotation block in the coding region can be carried out by the lateral grooves of the key and the lateral shoulders of the associated special tumbler pin. According to the invention there is further provided a lock system with security keys with at least two coding rows / pin rows on the flat sides of the key and with assigned cylinders with tumbler pins and with counter pins and with an insertion block, acting in a vertical direction to the key axis, wherein - keys with two parallel lateral grooves and a central groove which are formed parallel to the key axis and symmetrically to the central plane of a pin row, with coding recesses in the region of the central groove at first coding positions, - wherein the lateral grooves and the central groove or a central projecting part are extending from the key tip to a coding region of the first coding positions - and said lateral grooves in an entry region at the key tip running at a high level and in the coding region of the first coding positions running in a sunk manner at a lower level, - and with assigned cylinders with a circularly symmetric special tumbler pin at the rearmost coding position of the cylinder, said special tumbler pin comprising additional lateral shoulders, - wherein these lateral shoulders of the special tumbler pin are shaped such that they correspond to the lateral grooves of the key, 6308424 1 (GHMatters) P99251.AU LYNT lb - and wherein in the entry region, the length of the special tumbler pin and an extended counter pin up to the lateral shoulder corresponds to the distance from the cylinder housing up to the lateral groove, - and at a first coding position, the length of the special tumbler pin up to the lateral shoulder corresponds to the distance from the shear line up to the lateral groove, with a tolerance region, - so that an additional insertion block acting in vertical direction to the key axis in the entry region and an additional rotation block in the coding region can be carried out with the lateral grooves of the key and with the lateral shoulders of the assigned special tumbler pin. According to the invention there is further provided a method for manufacturing a key as described above, from a blank as described above, by way of a coding, - wherein on the blank, a central groove is manufactured in the entry region and coding recesses are manufactured at the first coding positions in the coding region, by way of material removal at the central projecting part. It is an advantage of the present invention, to provide a system with blanks, security keys and with assigned cylinders which significantly improves the characteristics of known systems, in particular of the known block-code system according to EP 1 185 755, with additional security functions, an improved replication protection for keys and blanks by way of a shaping which is difficult to define and copy and which moreover permits higher permutation capacities. Moreover, a reliable functioning over a long period of use and robustness with respect to wear are to be achieved, and a rational, inexpensive series production is to be possible. Above all, the new shaping should also not necessitate additional space on the key with several coding rows. A complete market range is to be covered by only one type of blank, and unauthorised key replications by way of key-cutting services are to be prevented. This new blank block-code system emanates for example from the previous block-code system and additionally comprises new features, characteristics and functions, with which the mentioned objects can be achieved, as shown and explained further also by way of the figures. 6308424 1 (GHMatters) P99251.AU LYNT 2 The known block-code system EP 1 185 755 in contrast comprises a lock system with security turn keys for lock installations, with at least three coding rows / pin rows Al, A2 A3 which are arranged on the flat sides of the key S, with assigned cylinders Z with pin rows of tumbler pin pairs, consisting of tumbler pins and counter pins at the positions of a given drill pattern, wherein the keys comprise a horizontal blocking groove BN which runs parallel to the key axis x from the key tip at least up to the first coding position PI of a pin row on the key, and the blocking groove has a coded blocking depth BI, B2, B3, and a tumbler pin pair corresponding to the blocking groove BN and with a standard tumbler pin as a blocking tumbler pin BZ and with an extended counter pin as a blocking counter pin BG, is provided in the assigned cylinder at least at the rearmost coding position P1, so that the blocking counter pin BG stands up on the cylinder housing 10 if the blocking groove is not deep enough and thus the complete insertion of a key with a blocking groove which is not deep enough is blocked by the tumbler pin pair, and wherein the blocking tumbler pin BZ with the blocking counter pin BG after insertion of the key, at the position P1 is also applied as a coding pin with standard coding steps Cl1, C2, C3, C4 with respect to the rotation of the cylinder. New, important features of the new blank block-code system, amongst other things are: The new blank comprises two parallel lateral grooves and a central projecting part therebetween. The lateral grooves in an entry region run at a high level and in a first coding region at a low level. A key is manufactured from the new blank with the forming out of a central groove in the entry region and of coding recesses on the central projecting part in the coding region. The lateral grooves of the blank and the central groove of the key result in a new composite blank block code groove. In the cylinder, a new special tumbler pin with lateral shoulders, whose shaping corresponds to the lateral grooves and the central groove, is assigned to the key, so that an additional insertion block in the entry region and an additional rotation block in the coding region are fonned with the special tumbler pin. With this, the security of the locking system is significantly increased and counterfeits and unauthorised key copies are prevented. The new features cannot be deduced from the known system of EP 1 185 755: Its simple, horizontal blocking groove BN corresponds to the standard coding pins and it is not sunk and the blocking tumbler pin BZ is a standard coding pin of the coding row. Further not present are: The two lateral grooves, sunk from the high level to a low level; the central projecting part on the blank and on the key with coding recesses; the special tumbler pin in the cylinder with the additional lateral shoulders which correspond to the lateral grooves and the central groove on the key. The additional insertion block and the additional rotation block are not possible according to EP 1 185 755.

3 The invention according to the independent claims permits different advantageous further embodiment variants with further improvements and optimisations of the desired characteristics in accordance with the desired applications, e.g. with the following additional features: with a widening of the RB groove; with a sunk central projecting part; with RB coding steps which differ from the standard coding steps and/or with an additional side groove for non-vertical pin rows. The dependent patent claims relate to advantageous further developments of the invention which permit further advantages with respect to the security of the lock system, duplication security of blanks, keys and cylinders, with respect to a long service life, with respect to the rational manufacture and reliable service as well as a greater number of permutations. The invention is hereinafter explained in more detail by way of embodiment examples and figures. Thereby are shown in: Fig. 1 schematically, a blank according to the invention, with two vertical lateral grooves and a central projecting part and their levels, Fig. la - in a longitudinal section through the central plane of the pin row; Fig. I b - in a cross section through the entry region at the key tip, Fig. Ic - in the coding region of the first coding position, Fig. 2 a blank with inclined inner walls of the lateral grooves, Fig. 2a - in a cross section through the entry region, Fig. 2b - in the coding region, Fig. 3 a key according to the invention, with two lateral grooves and with a central groove in the region of the central projecting part, Fig. 3a - in a longitudinal section, with lateral grooves, central projecting part and central groove at a high and at a low level, Fig. 3b - in cross section in the entry region, with lateral grooves, central groove and assigned special tumbler pin with lateral shoulders, central part as well as a milling cutter for coding, Fig. 3c - in the coding region at a first coding position, Fig. 3d - at a second coding position, Fig. 3e - a standard coding pin of the coding row and a standard coding recess, Fig. 3f - an example with a widened RB groove and a widened special RB tumbler pin, Fig. 4 a lock system according to the invention, with a key with lateral grooves, central projecting part and central groove and with an assigned cylinder with counter pin and special tumbler pin with lateral shoulders, Fig. 4a - in a longitudinal section Fig. 4b - in cross section in the entry region, 4 Fig. 5-8 in cross section, a key with a special tumbler pin and counter pin of an assigned cylinder, Fig. 5 - in the entry region with the function of an insertion block, Fig. 6 - in the coding region with the function of a rotation block, Fig. 7 - in the coding region with a standard coding pin of the coding row, Fig. 8 - at a first coding position, a counterfeit key and the special tumbler pin of the cylinder, Fig. 9 - 11 on a key, different coding steps and groove shapes in the entry region and in the coding region, Fig. 9 - standard coding steps on a previous key with a previous blocking groove, Fig. 10 - standard coding steps on a new key with new, combined RB grooves, Fig. 11 new RB coding steps, Fig. 12 an example of a widened RB groove with RB tumbler pin, Fig. 13a in cross section, an example of a blank with an inclined coding row with lateral grooves, central projecting part and a side groove, Fig. 13b a plan view of the blank as well as a milling cutter for creating lateral grooves, central projecting part and side groove Fig. 13c a perspective view of the blank. Fig. 14a a perspective view of a coded key which is manufactured from the blank, Fig. 14b a cross section of the key with an assigned special tumbler pin and a standard tumbler pin of the coding row. Fig. 15 views of a key from above and perspectively, with different codings, Fig. 16 a manufacturing method of a blank and a key with milling cutters, in different steps, Fig. 17-19 a further example of a blank and key with a particularly wide central groove, Fig. 17 in a cross section, the key with RB groove in the cylinder with assigned tumbler pins, Fig. 18 in cross section, a wrong key at the same location in the cylinder with the RB tumbler pin, Fig. 19a perspectively, the blank with a sunk central projecting part, Fig. 19b the key with five coding rows and with codings. Fig. la-c schematically show a blank R according to the invention, with two vertical lateral grooves RB-SN and with a central projecting part RB-M which run initially at a high level NI and subsequently sunk or lowered to a lower level N2, parallel to the key axis x. Thereby, 7 indicates the area and 5 the central bisecting plane of the blank and key. Fig. la shows the blank in a longitudinal section through the central plane of a coding row A with the coding steps C1 - C4 for the standard coding pins Cod-ZI- of this coding row A.

5 The lateral grooves RB-SN in an entry region RB-B at the tip of the key run at a high level NI and at a lower level N2 in the coding region RB-P of the first coding positions P1, P2 which e.g. correspond to the coding positions L 11 and R5 of a left-hand or right-hand drill pattern. The central projecting part RB-M can run continuously at the height of the key surface 7 or also in a sunk manner. In the simplest case, the central projecting part RB-M runs in a continuous manner RB M(1) and is only formed by way of creating the sunk lateral grooves (e.g. by way of a disc milling cutter). The central projecting part on the blank can also be sunk in the coding region RB-P: RB-M(2), depending on the application. A simpler coding and a more rational manufacture of the key can be achieved with this. Manufacturing methods for this are e.g. described with regard to Fig. 13b and 16. Fig. lb shows a cross section through the entry region RB-E at the key tip with the high level NI of the lateral grooves. Fig. le in the coding region RB-P shows the deeper level N2 of the sunk lateral grooves and also a (less greatly) sunk central projecting part RB-M(2). Fig. 1c also shows the widths of the complete RB groove, lateral grooves and central projecting part: bg, bn and bm (see Fig. 3d). The blank R according to the invention, for manufacturing a security key S with at least two coding rows / pin rows Ai on the flat sides of the key for an assigned cylinder Z with tumbler pins ZH and counter pins GZH comprises two parallel lateral grooves RB-SN and a central projecting part RB-M between the lateral grooves, and these are formed parallel to the key axis x and symmetrically to the central plane of the coding row / pin row A. These lateral grooves RB-SN in an entry region RB-E at the key tip run at a high level NI and in a coding region RB-P of the first coding positions P1, P2 run at a lower level N2. The lateral grooves RB SN are suitably shaped, in order to correspond to the additional lateral shoulders RB-ZH-S of an assigned special tumbler pin RB-ZH and of an extended counter pin RB-GZH of the cylinder, so that an additional insertion block in the entry region RB-E and an additional rotation block in the coding region RB-P can be carried out with the lateral grooves RB-SN and the lateral shoulders RB-ZH-S. Fig. 2a, 2b show a blank R with inclined inner walls 11 of the lateral grooves RB-SN which have an inclination angle Wm to the central plane of the coding row A (pin plane). This inclination angle Wm can e.g. be 10 - 400 and permit further shape variants of lateral grooves and be optimised according to the application.

6 Fig. 2a shows a corresponding shaping of the lateral grooves RB-SN in the entry region RB-E and in Fig. 2b in the coding region RB-P. Only the lateral grooves RB-SN and the central projecting part RB-M are present on the blank. The composite blank block-code groove = RB-SN + RB-MN is not formed on the key until with the coding and a milling cutter for the coding by way of manufacturing the central groove RB-MN. Fig. 3a - d show a key S according to the invention, with the two lateral grooves RB-SN and with a central groove RB-MN which is manufactured on the central projecting part RB-M or in its region. In this example, the coding position P1 is coded with the coding step Cl, and the coding position P2 with the coding step C2, in the coding region RB-P. Fig. 3a shows a longitudinal section through the key S. Fig. 3b shows a cross section in the entry region RB-E with a composite RB groove = RM-MN + RB-SN. This corresponds to an assigned special tumbler pin RB-ZH in the cylinder with additional lateral shoulders RB-ZI-1-S which correspond to the lateral grooves RB-SN of the key S. Also shown is a coding milling cutter 14 for coding standard codings Ci (and also RB codings) which corresponds to the shape of the standard coding pins Cod-ZH. A blocking groove BN which is (illegally) manufactured with this, in the entry region of a key would be blocked out by the lateral shoulders RB-ZH-S of the RB tumbler pin (with the additional blocking area Fs, see Fig. 5 and 10). Fig. 3c shows a cross section in the coding region RB-P at the coding position P1, here with a deepest coding Cl, at which the lateral grooves RB-SN lie at the level N2. Fig. 3d at the coding position P2 shows a coding C2 with the central groove RB-MN on the central projecting part RB-M. The width bn of the lateral grooves RB-SN and the width bm of the central projecting part RB-M are matched to one another. Together, the total groove width results: bg = bm + 2 bn. These widths bn and bm can lie in a region of bn = 20 - 33% and bm = 33 - 60 % of the total groove width bg.

7 Preferably, the width bm of the central projecting part is at least 33% of the complete groove width bg, and the width bn of the lateral grooves is at least 20% of the complete groove width bg. Fig. 3e shows a standard coding pin Cod-ZH and a standard coding recess Cod-V of the coding row A. The security key S according to the invention with at least two coding rows / pin rows Ai on the flat sides of the key for an assigned cylinder Z with tumbler pins ZH and counter pins GZH in a coding row A comprises two parallel lateral grooves RB-SN and a central groove RB MN between the lateral grooves, and these are formed parallel to the key axis x and symmetrically to the central plane of a coding row - pin row A, wherein coding recesses are formed at the first coding positions P1, P2, in the region of the central groove RB-MN in a coding region RB-P. The key preferably comprises at least three or more coding rows Ai. These lateral grooves RB-SN in an entry region RB-E at the tip of the key run at a high level NI and in a coding region RB-P of the first coding positions P1, P2 are sunk to a lower level N2. Additional permutations in the coding region are created with this. The lateral grooves RB-SN are suitably shaped, in order to correspond to the additional lateral shoulders RB-ZH-S of an assigned special tumbler pin RB-ZH and an extended counter pin RB-GZH of the cylinder, so that an additional insertion block in the entry region RB-E or an additional rotation block in the coding region RB-P can be carried out .with the lateral grooves RB-SN of the key and with the lateral shoulders RB-ZH-S of the tumbler pin RB-ZH, wherein in the region of the central projecting part RB-M, the additional central groove RB-MN can be created in the entry region RB-E and the codings of P1, P2 in the coding region RB-P. The special tumbler pin RB-ZH, in a manner corresponding to the first coding positions P1, P2 on the key, must be arranged at the rearmost position of the pin row A in the cylinder. Fig. 3f shows a further example of a key S(2) with a widening of the RB-groove: RB N(2) compared to the standard codings of the coding row A: The width bg(2) of the RB groove (with lateral grooves RB-SN and central projecting part RB-M or central groove RB-MN) on both sides is greater than the width bev of the coding recesses Cod-V of the coding row A by an amount bb: bg(2) = bev + 2bb (see Fig. 12 and 17). Further improvements of the characteristics such as functional reliability, counterfeit security and service life can be achieved with this widening, in particular for cylindrical tumbler pins and codings. Fig. 4a, b in the longitudinal and transverse section show a lock system according to the invention, with a key S with lateral grooves RB-SN, a sunk central projecting part RB-M(2) and a central groove RB-MN as well as with an assigned cylinder Z with an extended counter pin 8 RB-GZH and a special tumbler pin RB-ZH with the lateral shoulders RB-ZH-S. These tumbler pins in the entry region RB-E effect an insertion lock for counterfeit or wrong keys: once by way of the central part RB-ZH-M and additionally by way of the lateral shoulders RB-ZH-S of the tumbler pin RB-ZH. With counterfeit keys which have an insufficiently deep central groove or lateral grooves, the extended counter pin RB-GZH stands up on the cylinder housing 10 and thus the complete insertion of the counterfeit key is prevented. In an analogous mainer, with non-matching coding shapes and coding depths of a wrong key, a rotation block is implemented in the coding region RB-P, by way of the lateral shoulders RB-ZH-S and/or of the central part RB-M of the special tumbler pin RB-ZH being present in an incorrect coding recess and thus the tumbler pin RB-ZH reaching beyond the shear line 9 and thus preventing the rotation of the key. The lock system according to the invention with security keys S with at least two coding rows / pin rows Ai on the flat sides of the key and with assigned cylinders Z with tumbler pins ZH and counter pins GZH comprises keys S with two parallel lateral grooves RB-MN and a central'groove RB-MN in a coding row A, and these are formed parallel to the key axis x and symmetrically to the central plane of the pin row A, with coding recesses in the region of the central groove RB-MN at the first coding positions.Pi, P2. These lateral grooves RB-SN in an entry region RB-E at the key tip run at a high level NI and in a coding region RB-P of the first coding positions P1, P2 they are sunk to a lower level N2. The assigned cylinders Z at their rearmost coding position P1, P2 of the cylinder comprise a special tumbler pin RB-ZH with additional lateral shoulders RB-ZR-S. These lateral shoulders RB-ZH-S of the tumbler pin RB-ZR are shaped such that they correspond to the lateral grooves RB-SN of the key, wherein at a first coding position P1, P2, the length ls from the tumbler pin RB-ZH and the counter pin RB-GZH up to the lateral shoulder RB-ZH-S corresponds to the distance ds from the cylinder housing 10 up to the lateral groove RB-SN and the length Iz of the tumbler pin RB-ZH up to the lateral shoulder RB-ZH-S corresponds to the distance dz f-rom the shear line 9 up to the lateral groove RB-SN, with a tolerance region to, so that an additional insertion block in the entry region RB-E and an additional rotation block in the coding region RB-P can be carried out with the lateral grooves RB-SN of the key and with the lateral shoulders RB-ZH-S of the assigned special tumbler pin RB-ZH, due to the counter pin RB-GZH standing on the cylinder housing 10 (insertion block) in the entry region and the special tumbler pin RB-ZH reaching beyond the shear line 9 in the coding region (rotation block), in the case of absent lateral grooves RB-SN or ones which are not deep enough.

9 Figs 5- 8 for example further illustrate the functions of the new blank block-code system and in cross section show a key as well as a special tumbler pin RB-ZH and a counter pin RB GZH of an assigned cylinder. Fig. 5 illustrates the function of the entry block in the entry region RB-E. The tumbler pin pair RB-ZH + RB-GZH has a length Is up to the lateral shoulder RB-ZH-S, and ds here indicates the distance from the cylinder housing 10 up to the lateral grooves RB-SN. The length Is plus a small tolerance region to (of e.g. 0.05 - 0.1 mm) corresponds to the distance ds and thus permits the insertion of the key, whereas with a counterfeit key with absent combined grooves RB-MN and RB-SN or ones which are not deep enough, the tumbler pin pair RB-ZR + RB-GZH would stand up on the cylinder housing 10 and thus would prevent the insertion of a counterfeit or wrong key (see Fig. 4a). Fig. 6 illustrates the function of the rotation block in the coding region RB-P. The key can be rotated with correctly coded grooves RB-MN and RB-SN, with which the length Iz of the assigned tumbler pin RB-ZH up to the shoulder RB-ZH-S is also not greater than the distance dz from the shear line 9 up to the lateral grooves RB-SN at the level N2. Otherwise not, as illustrated in Fig. 8. Fig. 7 at a coding position P1, P2 shows a (previous) standard coding pin Cod-ZH of the pin row A, instead of the special tumbler pin RB-ZH which can also correspond to the shear line 9. According to the invention however, it is the special tumbler pin RB-ZR which is applied and not a standard coding pin of this pin row A, as with the previous block-code according to EP 1 185 755. Fig. 8 at a first coding position P1, P2 shows a counterfeit (falsified) key Sb, with which the coding depth Cl in the region RB-MN would probably have been correctly copied in a standard coding recess Cod-V (matching with a previous standard coding pin Cod-ZH according to Fig. 7). The special tumbler pin RB-ZH however would stand up with the lateral shoulders RB-ZH-S on the coding recess Cod-V and thus reach beyond the shear line 9 (blocked out by a distance a) and would prevent the rotation. This additional rotation block, by way of the tumbler pins RB-ZH at the coding steps in the coding region RB-P of an incorrect key Sb, is also illustrated in the Fig. 9 and 10. Figs. 9 - 11 on a key show different coding steps Ci and groove shapes in the entry region and at the first coding positions as well as a comparison of previous blocking grooves (BN) with new RB grooves.

10 Compared to the blocking area of the previous blocking groove (BN) in the entry region, the blocking area of a new, composite blank block-code RB groove = RB-MN + RB-SN of the same size and blocking effect is wider and less deep. A greater coding depth region (e.g. more coding steps) up to the deepest coding step CI for the coding of the positions P1, P2 is available by way of this. Or the blocking area and the blocking effect of the new RB groove are accordingly greater in the entry region RB-E, given the same depth as with the previous blocking groove (BN). The distance dN between the level NI and N2 must be at least one coding step dC. Preferably, N2 corresponds to the deepest coding step, here C1 in Fig. 10 and 11. Fig. 9 shows standard coding steps CI - C4 on a previous or on a counterfeit key Sb with a previous blocking groove BN with a depth B2, which lies below the coding step C3. Only two steps therefore remain for the coding of the coding positions P1, P2: C1 and C2. Fig. 10 shows a new RB groove with a blocking area Fs of the same size as in Fig. 9 and with a lower depth = at the height of the coding step C3. Therefore three steps C1, C2, C3 remain for the coding PI, P2. Fig. 11 shows a new RB groove with the same depth (B2) as that of the previous blocking groove BN of Fig. 9 and with a significantly larger blocking area Fs and blocking effect. Moreover, here the RB coding steps C2* and C3* could be set somewhat more deeply than the standard coding steps C2, C3, so that also three steps for the coding of P1, P2 are possible with this: Cl, C2*, C3*. The RB coding steps Ci* in the coding region can be situated higher or more deeply than the standard coding steps Ci of the coding row A for the standard tumbler pins Cod-ZH with a correspondingly different length of the assigned special tumbler pin RB-ZH. Preferably, at least one RB coding step Ci* does not need to correspond to a standard coding step Ci. The number of possible permutations and the duplication security can thus be significantly increased with the new RB grooves. A previous or a counterfeit key Sb with a previous blocking groove BN in the entry region RB-E and with the previous standard coding recesses (produced by way of a milling cutter 14 for coding), on account of the special tumbler pin RB-ZH (which corresponds to the RB-groove) - in the entry region RB-E would be blocked against insertion (due to the additional blocking area Fs) 11 - and at the coding positions PI, P2 in the coding region at all coding steps Cl, C2, C3 would be blocked against rotation, even if the depths in the entry region and at the coding positions were to be equal as with a correct key S with RB groove and RB codings, as is illustrated in Fig. 6, 8, 9 and 10. Such a false or unauthorised key copy (Sb) which would be copied by a key-cutting service by way of a milling cutter for coding, with the same depths in the entry region and at the coding positions P1, P2 as the original key, would therefore come up against an insertion block and a rotation block. Fig. 12 shows a further example of a widened RB groove with RB tumbler pin, in comparison to the standard coding pins Cod-ZH and coding recesses Cod-V of the coding row A with cylindrical tumbler pins. Additionally to the widening bb, here the distance ba is shown, by which the RB tumbler pin RB-ZH reaches beyond the coding recesses Cod-V on both sides: brz(2) = bcv + 2 ba (see also Fig. 3e, 3f and18). Fig. 13 and 14 show a further example of an blank and a key, according to the invention, wherein here the pin row A has an inclination angle Wa of 15' to the z-direction. Fig. 13a, b, c in different views show the blank R with the new set down lateral grooves RB-SN and the central projecting part RB-M as well as with an additional side groove RB-nn Fig. 13a in cross section shows the inclination angle Wa of the pin row A, the lateral grooves RB-SN, the central projecting part RB-M and the side groove RB-nn in the entry region RB-E as well as in the coding region RB-P. Fig. 13b shows a view from above onto the blank which is rotated by 150 (thus in the direction of the pin plane A). This figure also illustrates an advantageous rational manufacture of a blank, by way of firstly a sunk central projecting part RB-M(2) being able to be manufactured in the coding region RB-P by way of a cylinder milling cutter 15 and subsequently the lateral grooves RB-SN being able to be manufactured in the entry region RB-E at a level N1 and in the coding region RB-P at a level N2, by way of a milling cutter 16. In this example with perpendicular inner walls 11 of the lateral grooves RB-SN, e.g. by way of a cylinder milling cutter 16, and for inclined inner walls 11 by way of a cone milling cutter (see example Fig. 2a, b). Fig 13e shows the blank in a perspective view.

12 With a blank or a key with an inclined pin plane A with an angle of inclination Wa > 0, on the inner side, an additional side groove RB-nn preferably can adjoin to the lateral groove RB-SN, said side groove forming a supporting surface which is orthogonal to the coding plane / pin plane A. The lead-in of a zero tumbler pin is rendered possible or can be optimised by way of this for example. Such a zero tumbler pin consists only of an upper part with a width bO without the lower coding part, as is illustrated in Fig. 14b. With the method according to the invention, for manufacturing a key S from a blank R, a central groove RB-MN is manufactured in the entry region RB-E, and coding recesses Cod-V at the first coding positions P1, P2 in the coding region RB-P, by way of a coding on the blank R by way of removing material away from the central projecting part RB-M. Thereby, the lateral grooves RB-SN are firstly manufactured on the blank at a high level NI, and set down at a lower level N2 with the central projecting part RB-M. Subsequently, the second part RB-MN of the combined RB groove = RB-SN + RB-MN is manufactured with the coding, and the coding on the central projecting part RB-M of the key is manufactured. This permits an improved copy protection and further security functions. A blank with a non-sunk central projecting part RB-M can e.g. be simply manufactured by way of manufacturing the sunk lateral grooves RB-SN by way of a disc milling cutter. Preferably, firstly a sunk central projecting part RB-M(2) can be manufactured on the blank in the coding region (RB-P) by way of a first milling cutter, and subsequently the lateral grooves RB-SN in the entry region (RB-E) at a high level (NI) and in the coding region (RB-P) at a lower level (N2) by way of a second milling cutter. A coded key S with four coding rows Al to A4 and manufactured from the blank is shown in Fig. 14a, b. Fig. 14a shows a perspective view of the key with a coding step CI at the coding position P1 and a coding step C2 at the coding position P2, in the coding region RB-P, and these are incorporated on the central projecting part RB-M. Fig. 14b shows a cross section of the key with an assigned special tumbler pin RB-ZH at a coding position in the coding region RB-P and a standard coding pin Cod-ZH as well as a standard coding recess Cod-V of the same coding row (i.e. from position P3). Fig. 15 from above and in a perspective manner shows a further example of a key with a RB groove which is widened on both sides by bb and has a width bg(2) = bev + 2 bb and with 13 RB coding steps Ci* which differ from the standard coding steps, here at position P1 :C1 *, at P2:C2* and at P3:C2. Fig. 16 shows a manufacturing method of a blank and a key with an inclined pin plane A with milling cutters, in different steps: In a first step a the milling of a sunk central projecting part RB-MN(2) in the coding region RB-P and in step b the milling of a side groove RB-nn, by way of a first milling cutter 15, then in step g the milling of the two lateral grooves RB-SN by way of a second milling cutter 16, and later in step d the milling of the central groove RB-MN and the coding recesses in the coding region RB-P (P1, P2) as well as at the further coding positions P3, P4 etc. of the standard codings of the coding row A, by way of a milling cutter 14 for coding. The central projecting part RB-M(2) preferably at the most is sunk to the'height of the uppermost coding step - here at the most to C2*. (In Fig. 10, at the most to C3, and in Fig. 11 at the most to C3*). Figs 17 - 19 show a further embodiment example of a blank and key, according to the invention, with a vertical pin row A in a cylinder. Here, a particularly wide central groove RB MN with a width bmn e.g. for a particularly good guidance of the tumbler pins through the central groove with minimal wear is envisaged. Fig. 17 in cross section shows the key with an RB groove in the cylinder and with assigned tumbler pins of the coding row Al. The special tumbler pin RB-ZH lies in a deepest coding position, e.g. P1:C1, so that the correct key can be rotated at the shear line 9. The widening of the RB groove compared to the standard codings Cod-V of the same coding row Al is: 2 bb = bg(2) - bcv. Fig. 18 in cross section shows a wrong key Sb at the same location in the cylinder with an RB tumbler pin, wherein the wrong key Sb has a standard coding Cod-V instead of the widened RB-grooves RB-SN and RB-MN . Here, the RB tumbler pin already stands up on the key surface 7 and thus at the shear line 9 blocks against rotation. This is the case even if here the width brz of the tumbler pin RB-ZH is only slightly larger (ba) than the width bcv of the standard coding recess Cd-V by the amount 2 ba = brz - bcv. This is because the springs of the counter pin (see Fig. 4a) cannot forcibly press the tumbler pin RB-ZH into the recess Cod-V which is to narrow. In contrast to the coding row Al with cylindrical tumbler pins RB-ZH and Cod-ZH of Fig. 17, the key here also has a further coding row A2 with conical tumbler pins and recesses Cod-V2.

14 The Fig. 19a, b perspectively show the blank R and the key S with (at least) five coding rows Al- A5 and with codings. Fig. 19a shows the blank R with the lateral grooves RB-SN and the central projecting part RB-M in the entry region RB-E and, in a sunk manner, in the coding region RB-P for the coding positions P1, P2. Fig. 19b shows a coded key S which is manufactured from the blank, wherein the RB shaping is incorporated in the vertical pin row Al (Wa = 00). The key in the coding region RB-P here comprises the following codings on the central projecting part RB-M: - the coding step C2 at the coding position P1 and - the coding step Cl at the coding position P2. In the claims which follow and in the preceding description of the invention, except where the context requires otherwise due to express language or necessary implication, the word "comprise" or variations such as "comprises" or "comprising" is used in an inclusive sense, i.e. to specify the presence of the stated features but not to preclude the presence or addition of further features in various embodiments of the invention. It is to be understood that, if any prior art publication is referred to herein, such reference does not constitute an admission that the publication forms a part of the common general knowledge in the art, in Australia or any other country. 6308424 1 (GHMatters) P99251.AU LYNT 15 The following terms are applied within the framework of this description: x key axis x, y, z directions in space R blank, key blank S key Sb previous key, wrong key Z cylinder Pi coding positions Ri, Li right-hand, left-hand coding positions of a drill pattern A coding row, pin row (central plane) Ci, Ci* coding steps, coding RB blank block-code (-function) RB-SN RB lateral grooves RB-M RB central projecting part RB-MN central groove on S RB-N composite RB groove = RB-SN + RB-MN or RB-SN + RB-M RB-nn side groove Cod-V coding recess Cod-ZH coding pin (standard), coding tumbler pin Cod-ZH-M centre part of coding pin (trace part) RB-ZH special RB tumbler pin RB-GZH RB counter pin RB-ZH + RB-GZH RB tumbler pin pair RB-ZH-S ZH lateral shoulder RB-ZR-M ZH central part (coding trace part) Fs additional blocking area RB-E entry region RB-P coding region (Pl, P2...) of frontmost positions Is length of RB-ZH + RB-GZH to RB-ZH-S ds distance from 10 to RB-SN Iz length of RB-ZH to RB-ZH-S to tolerance region dz distance of 9 to RB-SN dN distance of Nl to N2 a lock-out distance dC one coding step bm width of RB-M bn width of RB-SN 16 bg width of RB-N = RB-SN + RB-M bnn width of RB-nn bg(l) = bcv bg(2) = bcv + 2bb brz width of RB-ZH bcv width of Cod-V bez width of Cod-ZH bb widening of RB-N: bg(2) bv + 2 bb ba brz-bev =2ba bmn width of RB-MN bO upper width of ZH Wm inclination angle of 11 Wa inclination angle of A 5 central (bisecting) plane of S 7 surface of S 9 shear line in Z 10 cylinder housing I inner walls of RB-SN 14 milling cutter for coding 15, 16 milling cutter for blank

Claims

1. A blank for manufacturing a security key with at least two coding rows / pin rows on the flat sides of the key for an assigned cylinder with tumbler pins and with counter pins of a lock system with an insertion block, acting in a vertical direction to the key axis, wherein - two parallel lateral grooves and a central projecting part between the lateral grooves, and which are formed parallel to the key axis and symmetrically to the central plane of a coding row / pin row, - wherein the lateral grooves and the central projecting part are extending from the key tip to a coding region of the first coding positions, - and said lateral grooves in an entry region at the key tip running at a high level and in the coding region of the first coding positions running in a sunk manner at a lower level, - wherein the lateral grooves are suitably shaped, in order to correspond to additional lateral shoulders of an associated circularly symmetric special tumbler pin and an extended counter pin at the rearmost coding position of the cylinder, - so that an additional insertion block acting in a vertical direction to the key axis in the entry region and an additional rotation block in the coding region can be carried out by the lateral grooves of the blank and the lateral shoulders of the associated special tumbler pin.

2. A blank according to claim 1, wherein the central projecting part is sunk to a lower level in the coding region.

3. A blank according to claim 1 or 2, wherein the complete width bg(2) of lateral grooves and the central projecting part on both sides is larger than the width (bcv) of the coding recesses of the coding row by an amount (bb): bg (2) = bcv + 2 bb.

4. A blank according to one of the preceding claims, wherein the width (bm) of the central projecting part is at least 33% of the complete groove width (bg).

5. A blank according to one of the preceding claims, wherein the width (bn) of a lateral groove is at least 20% of the complete groove width (bg).

6. A blank according to one of the preceding claims, wherein the inner walls of the lateral grooves are inclined at an angle Wm to the pin plane.

7. A blank according to claim 6, wherein the angle Wm is = 10' - 40'.

8. A blank according to one of the preceding claims, wherein with an inclined pin plane with an inclination angle Wa > 0, on the inner side, an additional side groove adjoins to the 6308424 1 (GHMatters) P99251.AU LYNT 18 lateral groove, said side groove forming a supporting surface orthogonal to the coding plane / pin plane.

9. A security key with at least two coding rows / pin rows on the flat sides of the key for an assigned cylinder with tumbler pins and with counter pins of a lock system with an insertion block, acting in a vertical direction to the key axis, wherein - two parallel lateral grooves and a central groove and a central projecting part between the lateral grooves, and these are formed parallel to the key axis and symmetrically to the central plane of a coding row / pin row, - wherein the lateral grooves and the central groove and the central projecting part are extending from the key tip to a coding region of the first coding positions, - wherein coding recesses are formed at the first coding positions in the region of the central groove in the coding region, - and wherein the lateral grooves in an entry region at the key tip running at a high level and in the coding region of the first coding positions running in a sunk manner at a lower level, - wherein the lateral grooves are suitably shaped, in order to correspond to additional lateral shoulders of an associated circularly symmetric special tumbler pin and an extended counter pin at the rearmost coding position of the cylinder, - so that an additional insertion block acting in a vertical direction to the key axis in the entry region and an additional rotation block in the coding region can be carried out by the lateral grooves of the key and the lateral shoulders of the associated special tumbler pin.

10. A key according to claim 9, wherein the coding recesses of the first coding positions are formed on a sunk central projecting part.

11. A key according to claim 9 or 10, wherein the complete width bg(2) of lateral grooves and the central groove on both sides is larger than the width (bcv) of coding recesses of the coding row by an amount (bb): bg (2) = bcv + 2 bb.

12. A key according to one of the claims 9 to 11, wherein with an inclined pin plane with an inclination angle Wa > 0, on the inner side, an additional side groove adjoins to the lateral groove, said side groove forming a supporting surface orthogonal to the pin plane.

13. A key according to one of the claims 9 to 12, wherein coding steps in the coding region are situated higher or more deeply than the standard coding steps of the coding row with a correspondingly different length of the assigned tumbler pin.

14. A key according to one of the claims 9 to 13, wherein the distance between the high level and the lower level is at least one coding step. 6308424 1 (GHMatters) P99251.AU LYNT 19

15. A lock system with security keys with at least two coding rows / pin rows on the flat sides of the key and with assigned cylinders with tumbler pins and with counter pins and with an insertion block, acting in a vertical direction to the key axis, wherein - keys with two parallel lateral grooves and a central groove which are formed parallel to the key axis and symmetrically to the central plane of a pin row, with coding recesses in the region of the central groove at first coding positions, - wherein the lateral grooves and the central groove or a central projecting part are extending from the key tip to a coding region of the first coding positions, - and said lateral grooves in an entry region at the key tip running at a high level and in the coding region of the first coding positions running in a sunk manner at a lower level, - and with assigned cylinders with a circularly symmetric special tumbler pin at the rearmost coding position of the cylinder, said special tumbler pin comprising additional lateral shoulders, - wherein these lateral shoulders of the special tumbler pin are shaped such that they correspond to the lateral grooves of the key, - and wherein in the entry region, the length of the special tumbler pin and an extended counter pin up to the lateral shoulder corresponds to the distance from the cylinder housing up to the lateral groove, - and at a first coding position, the length of the special tumbler pin up to the lateral shoulder corresponds to the distance from the shear line up to the lateral groove, with a tolerance region, - so that an additional insertion block acting in vertical direction to the key axis in the entry region and an additional rotation block in the coding region can be carried out with the lateral grooves of the key and with the lateral shoulders of the assigned special tumbler pin.

16. A method for manufacturing a key according to one of the claims 9 to 14, from a blank according to one of the claims 1 to 8, by way of a coding, wherein on the blank, a central groove is manufactured in the entry region and coding recesses are manufactured at the first coding positions in the coding region, by way of material removal at the central projecting part.

17. A method according to claim 16, wherein on the blank, firstly a sunk central projecting part is manufactured in the coding region by way of a first milling cutter, and subsequently the lateral grooves are manufactured in the entry region at a high level and in the coding region at a lower level by way of a second milling cutter.

18. A method according to claim 17, wherein on the blank, and with an inclined pin plane with an inclination angle Wa > 0, firstly the sunk central projecting part and an additional side groove are created by way of a first milling cutter. 6308424 1 (GHMatters) P99251.AU LYNT