EP0816598A1 - Serrure cylindrique, qui peut être bloqué par une clé passe-partout - Google Patents

Serrure cylindrique, qui peut être bloqué par une clé passe-partout Download PDF

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Publication number
EP0816598A1
EP0816598A1 EP96830373A EP96830373A EP0816598A1 EP 0816598 A1 EP0816598 A1 EP 0816598A1 EP 96830373 A EP96830373 A EP 96830373A EP 96830373 A EP96830373 A EP 96830373A EP 0816598 A1 EP0816598 A1 EP 0816598A1
Authority
EP
European Patent Office
Prior art keywords
plug
key
master key
keyway
bolt
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP96830373A
Other languages
German (de)
English (en)
Other versions
EP0816598B1 (fr
Inventor
Gersam Meroni
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Serrature Meroni SpA
Original Assignee
Serrature Meroni SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Serrature Meroni SpA filed Critical Serrature Meroni SpA
Priority to EP19960830373 priority Critical patent/EP0816598B1/fr
Priority to DE1996627996 priority patent/DE69627996T2/de
Publication of EP0816598A1 publication Critical patent/EP0816598A1/fr
Application granted granted Critical
Publication of EP0816598B1 publication Critical patent/EP0816598B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B27/00—Cylinder locks or other locks with tumbler pins or balls that are set by pushing the key in
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B27/00—Cylinder locks or other locks with tumbler pins or balls that are set by pushing the key in
    • E05B27/0053—Cylinder locks or other locks with tumbler pins or balls that are set by pushing the key in for use with more than one key, e.g. master-slave key

Definitions

  • the subject of the present invention is a cylinder lock that can be disabled by means of a master key.
  • the prior art includes cylinder locks that can be disabled by means of a master key, comprising a cylinder containing a rotatable plug that operates a bolt and comprising spring-activated pins, housed in the cylinder and in the plug, that immobilize the plug inside the cylinder and can be moved into a release position by a normal key or by the master key, inserted into the keyway of the plug, in order to allow the plug to be turned and the bolt operated; the master key is able to turn the plug from a first angular position, in which the bolt is closed but the plug can be released and the bolt withdrawn either with the normal key or with the master key, to a second angular position, in which the bolt is closed but the plug can be released and the bolt withdrawn only with the master key.
  • This lock is obviously useful in all situations where it becomes necessary to disable the lock or enable it to be operated by means of a master key only.
  • this lock can be fitted to the stop cock of a gas meter so that the gas supplier can cut off the gas supply if the user falls into arrears.
  • the lock can also be fitted to cupboards and containers in general where the particular features it provides are required.
  • the master key employed is longer than the normal key in order to fit the particular combination of pins that allows the master key to move the plug into the second angular position.
  • To have to make keys of different lengths is decidedly inconvenient from the manufacturing point of view.
  • a lock as described at the outset, characterized in that it comprises a stop piece fixed in the cylinder and projecting into the keyway of the plug with a connection such as to allow the plug to be turned, against which stop piece the normal key is stopped while turning the plug from the first angular position to the second and when inserting the normal key into the keyway in the second angular position before it reaches the end of the keyway, the master key having a cut corresponding to the stop piece so that it can pass it while turning the plug from the first angular position to the second and can be inserted all the way into the keyway of the plug in the second angular position.
  • the lock illustrated in Fig. 1 comprises a cylindrical body 10 in which an axial hole 11 houses a rotatable cylindrical plug 12.
  • the cylinder 10 contains a first series of radial holes 13 opening into the hole 11, and diametrically opposite these a second series of radial through holes 14 which also open into the hole 11.
  • a series of radial holes 15 designed to be lined up with the holes 13 when the plug 12 is in a first angular position and with the holes 14 when a plug 12 is in a second angular position.
  • a longitudinal keyway 16 is also formed in the plug 12 and the holes 15 lead into it.
  • the aligned holes 13 and 15 house three superimposed series of cylindrical pins 17, 18 and 19.
  • a corresponding series of springs 20 act on these pins and react on a series of caps 21 that close off the holes 13.
  • the pins 19 are hollow and each accomodates a respective spring 20.
  • the holes 14 house a series of pins 22, identical to the series of pins 19, on which act a series of springs 23 that react on a series of caps 24 closing off the holes 14.
  • a slot 26 in the shape of a 180° degree arc of a circle that extends through the keyway 16. Inserted in the hole 25, integrally with the cylinder 10, is a peg 27 which enters the slot 26.
  • the slot 26 consequently limits the rotation of the plug to 180° degrees between a first angular position and a second.
  • a diametrical cylindrical seat 28 housing a cylindrical bolt 29.
  • a spring 30 acts radially on the bolt 29 and reacts on the end wall of the seat.
  • the bolt 29 is recessed 31 to house a protruding portion 32 of the plug 12.
  • the spring 30 keeps the bolt 29 elastically in the out, i.e. closed, position, in opposition to the protruding portion 32 of the plug 12.
  • a shaped insert 33 Housed in the end of the keyway 16 of the plug 12 is a shaped insert 33.
  • the lock described above can be operated by means of a normal key, marked C, or a master key marked M.
  • the normal key C has teeth 34 different from the teeth 35 of the master key M and the master key M also has a cut 36 in its end on the opposite side from the teeth 35.
  • the master key M it is also possible for the master key M to turn 180° clockwise, with respect to the initial angular position, until the plug 12 with the pins 17 is brought over the holes 14. In this position the bolt 29 moves back into the out or closed position under the action of the spring 30 when released by the protruding portion 32 of the plug 12. In this position, if the master key M is inserted, the pins 17 are fully in the holes 15 while the pins 22 are fully in the holes 14 and it is therefore possible to turn the plug 12.
  • both the common key C and the master key M can be used to open and close the bolt 29.
  • the master key M also, when rotated through 180°, puts the lock in a disabled condition with the bolt closed, because in this position the normal key C is unable to enter the keyway 16 of the plug 12. If a person tried to make a cut in the common key C like the cut 36 of the master key M, it would admittedly be possible to insert the key C all the way into the keyway 16, but since the key C has different teeth from the master key M it will not be able to push the pins 17 and 22 into alignment in the way described above, and instead their misalignment will not allow the plug 12 to be turned.
  • the master key M is the same length as the normal key C, which means that key manufacture can be standardized.
  • the common key C and the master key M both turn in the same direction, clockwise in the present instance, so there will be no confusion over which way they should be turned.
  • the lock offers a twofold security in the disabled position (the 180° position) because, as already seen, the common key C will not fit all the way into the keyway and, if illicitly modified by cutting the cut as in the master key, it still cannot release the plug because the pins will still trap it, and hence the lock cannot be re-enabled.
  • the insert 33 prevents communication between the keyway 16 and the bolt 29 so that the bolt cannot be accessed through the keyway with a tool designed to operate the bolt without authorization. That is an additional security.
  • a simplified version may dispense with one of the two series of pins 17,18 and thus have a single combination, with the same teeth for both the common and master keys C,M. It is clear that in this form there is only a single security represented by the peg 27, for if an unauthorized modification is made to the common key C, as seen above, it will be able to re-enable the lock.
  • the configuration, arrangement and number of components of the lock may differ from that illustrated.
  • the configuration and number of pins and the configuration of the stop peg and of the bolt may be altered.
  • the peg may be replaced with stop pieces of any configuration providing an equivalent function to the peg.

Landscapes

  • Lock And Its Accessories (AREA)
  • Preventing Unauthorised Actuation Of Valves (AREA)
EP19960830373 1996-07-01 1996-07-01 Serrure cylindrique, qui peut être bloqué par une clé passe-partout Expired - Lifetime EP0816598B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP19960830373 EP0816598B1 (fr) 1996-07-01 1996-07-01 Serrure cylindrique, qui peut être bloqué par une clé passe-partout
DE1996627996 DE69627996T2 (de) 1996-07-01 1996-07-01 Schliesszylinder, der mittels eines Hauptschlüssels blockiert werden kann

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19960830373 EP0816598B1 (fr) 1996-07-01 1996-07-01 Serrure cylindrique, qui peut être bloqué par une clé passe-partout

Publications (2)

Publication Number Publication Date
EP0816598A1 true EP0816598A1 (fr) 1998-01-07
EP0816598B1 EP0816598B1 (fr) 2003-05-07

Family

ID=8225953

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19960830373 Expired - Lifetime EP0816598B1 (fr) 1996-07-01 1996-07-01 Serrure cylindrique, qui peut être bloqué par une clé passe-partout

Country Status (2)

Country Link
EP (1) EP0816598B1 (fr)
DE (1) DE69627996T2 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004009937A1 (fr) * 2002-07-24 2004-01-29 Ernst Keller Cle de surete et cylindre de fermeture
ITBS20110107A1 (it) * 2011-07-28 2013-01-29 Facchinetti S R L Flli Serratura a cilindro e valvola comprendente tale serratura
CN103276964A (zh) * 2013-05-14 2013-09-04 陆嘉良 一种空转锁
CN107288430A (zh) * 2017-08-07 2017-10-24 东莞市曼勒克特种防盗锁实业有限公司 一种需要两人同时插入钥匙双重确定的防盗弹子锁
IT202000023806A1 (it) * 2020-10-09 2022-04-09 Siam Inter Lock Tek Co Ltd Serratura configurata per controllare l'operabilita' di una valvola

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1922438A (en) * 1932-10-08 1933-08-15 American Hardware Corp Lock and latch
US2422600A (en) * 1945-10-05 1947-06-17 Gunnar E Swanson Master key cylinder lock
US4107966A (en) * 1977-04-08 1978-08-22 Schlage Lock Company Selectively rotatable cylinder for a lock
FR2470835A1 (fr) * 1979-11-29 1981-06-12 Elkem As Serrure cylindrique avec chevilles a gorge, et cle pour actionner cette serrure
EP0147377A1 (fr) * 1983-12-22 1985-07-03 GKN-Stenman AB Serrure cylindrique
WO1989008761A1 (fr) * 1988-03-08 1989-09-21 Assa Ab Serrure a cylindre
DE3929860A1 (de) * 1989-09-08 1991-03-21 Heinz Wolter Aus flachschluesseln und schliesszylinder bestehende schliessvorrichtung

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1922438A (en) * 1932-10-08 1933-08-15 American Hardware Corp Lock and latch
US2422600A (en) * 1945-10-05 1947-06-17 Gunnar E Swanson Master key cylinder lock
US4107966A (en) * 1977-04-08 1978-08-22 Schlage Lock Company Selectively rotatable cylinder for a lock
FR2470835A1 (fr) * 1979-11-29 1981-06-12 Elkem As Serrure cylindrique avec chevilles a gorge, et cle pour actionner cette serrure
EP0147377A1 (fr) * 1983-12-22 1985-07-03 GKN-Stenman AB Serrure cylindrique
WO1989008761A1 (fr) * 1988-03-08 1989-09-21 Assa Ab Serrure a cylindre
DE3929860A1 (de) * 1989-09-08 1991-03-21 Heinz Wolter Aus flachschluesseln und schliesszylinder bestehende schliessvorrichtung

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004009937A1 (fr) * 2002-07-24 2004-01-29 Ernst Keller Cle de surete et cylindre de fermeture
US6973814B2 (en) 2002-07-24 2005-12-13 Ernst Keller Safety key and locking cylinder, and locking system with such safety keys and locking cylinders
US7370503B2 (en) 2002-07-24 2008-05-13 Ernest Keller Safety key and locking cylinder, and locking system with such safety keys and locking cylinders
ITBS20110107A1 (it) * 2011-07-28 2013-01-29 Facchinetti S R L Flli Serratura a cilindro e valvola comprendente tale serratura
CN103276964A (zh) * 2013-05-14 2013-09-04 陆嘉良 一种空转锁
CN103276964B (zh) * 2013-05-14 2016-03-02 陆嘉良 一种空转锁
CN107288430A (zh) * 2017-08-07 2017-10-24 东莞市曼勒克特种防盗锁实业有限公司 一种需要两人同时插入钥匙双重确定的防盗弹子锁
IT202000023806A1 (it) * 2020-10-09 2022-04-09 Siam Inter Lock Tek Co Ltd Serratura configurata per controllare l'operabilita' di una valvola

Also Published As

Publication number Publication date
DE69627996D1 (de) 2003-06-12
DE69627996T2 (de) 2004-02-19
EP0816598B1 (fr) 2003-05-07

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