EP0846819A1 - Serrure cylindrique avec ensembles à goupilles anti-effractions améliorées - Google Patents

Serrure cylindrique avec ensembles à goupilles anti-effractions améliorées Download PDF

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Publication number
EP0846819A1
EP0846819A1 EP97121142A EP97121142A EP0846819A1 EP 0846819 A1 EP0846819 A1 EP 0846819A1 EP 97121142 A EP97121142 A EP 97121142A EP 97121142 A EP97121142 A EP 97121142A EP 0846819 A1 EP0846819 A1 EP 0846819A1
Authority
EP
European Patent Office
Prior art keywords
pins
plug
coding
holes
driver
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.)
Withdrawn
Application number
EP97121142A
Other languages
German (de)
English (en)
Inventor
Deo Errani
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.)
CISA SpA
Original Assignee
CISA 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 CISA SpA filed Critical CISA SpA
Publication of EP0846819A1 publication Critical patent/EP0846819A1/fr
Withdrawn legal-status Critical Current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
    • E05B27/0057—Cylinder locks or other locks with tumbler pins or balls that are set by pushing the key in with increased picking resistance
    • E05B27/006—Cylinder locks or other locks with tumbler pins or balls that are set by pushing the key in with increased picking resistance whereby a small rotation without the correct key blocks further rotation of the rotor

Definitions

  • the present invention relates to a cylinder lock provided with improved effraction-resistant pin assemblies.
  • a conventional cylinder lock comprises a body in which a cylindrical seat is formed; said seat rotatably supports a plug.
  • a bit is rotationally rigidly coupled to one end of the plug in order to actuate a bolt or spring-latch.
  • a keyway for inserting the key is formed axially in the plug and intersects a first set of holes, which are formed in a radial plane of the plug and in which a first set of coding pins is guided.
  • the coding pins have conical ends which protrude into said keyway and on which the key is meant to act with a coded portion.
  • a second set of holes is formed in said body so that each hole, in a given angular position of the plug, is aligned with a respective coding pin.
  • a plurality of driver pins and a plurality of springs are guided in said second set of holes; by acting on said plurality of driver pins, said springs keep each driver pin in contact with a respective coding pin.
  • the springs push the driver pins and the coding pins into a position in which the conical ends of the coding pins abut against the wall of the keyway and the driver pins intersect the shearing plane of the seat and the plug, preventing rotation of the plug.
  • cylinder locks of the described type resides in the fact that the coding pins can be accessed from outside through the front inlet of the keyway and can be moved by using suitable picking tools, so as to allow to turn the plug.
  • driver pin Owing to the different radial tolerances that always occur in the driver pins that protrude into the holes of the plug and in the diameters of the holes in the body, it is possible to lock the driver pin that has the least play. Said driver pin can be easily located by means of a picking tool inserted in the keyway, because of the fact that since it cannot slide it opposes greater resistance to the action of the picking tool. When said driver pin has been moved until the plane of contact with the corresponding coding pins lines on the shearing plane between the plug and the seat of the body, the action that locked the driver pin and was applied by means of the forced rotation of the plug ceases.
  • the plug can thus perform a minute additional rotation, until a new driver pin, whose play is the next smallest with respect to the released driver pin, is locked.
  • European patent 92,812 discloses a cylinder lock in which both the coding pins and the driver pins have regions with a smaller diameter which form respective heads at their opposite ends.
  • the heads are not as high as the coding step of the lock and are inclined at 45 o . In this manner, the reduced-diameter regions are assuredly always in the shearing plane and the heads are prevented from lying on said plane.
  • the aim of the present invention is to further improve cylinder locks provided with coding pins and driver pins, so as to offer greater resistance to effraction attempts.
  • an object of the present invention is to provide improvements which can be implemented without compromising the low cost of the lock.
  • a cylinder lock comprising: a body; a cylindrical seat formed in said body; a plug which can rotate in said seat; an actuation bit which rotates rigidly with said plug; a keyway for inserting a key, formed axially in said plug; a first set of holes, which are formed on a radial plane in said plug and intersect said keyway; a first set of coding pins, which can move in said first set of holes and have conical ends that protrude into said keyway and on which the key is meant to act with a coded portion; a second set of holes, equal in number to said first set, which are formed in said body and lie on a radial plane; a plurality of driver pins, which can slide in said second set of holes; a plurality of springs, which are accommodated in said second set of holes and act on said plurality of driver pins; each one of said driver pins being kept in contact with a respective coding pin by said spring
  • the lock comprises a body 1 which comprises a tubular portion 2 that forms a cylindrical seat 3 for a plug 4.
  • a bit (not shown) for actuating a bolt or spring latch is rotationally coupled in a known manner to the plug 4.
  • An expansion 5 protrudes from the tubular portion 2 of the body 1, and a plurality of blind holes 6 is formed in said expansion; said holes lie on a longitudinal plane which passes through the axis of the cylindrical seat 3.
  • the blind holes 6 accommodate a plurality of driver pins which are actuated by springs 7 interposed between their inner ends and the bottom of the blind holes 6.
  • the driver pins are of three kinds.
  • the driver pin designated by the reference numeral 8 is constituted by a simple cylinder.
  • the driver pins designated by the reference numeral 9 are constituted by a cylinder which has, at its opposite ends, narrower portions 10 having a smaller diameter and the same axial length.
  • driver pins designated by the reference numeral 11 are constituted by a cylinder in which two collars 12, 13 are formed which comprise, between them, a smaller-diameter region which is hereinafter referenced to as neck 14 for the sake of convenience in description.
  • the driver pins 11, like the driver pins 9, have respective reduced-diameter portions 15 at their opposite ends.
  • driver pins 9, 11 are symmetrical with respect to a centerline plane which is perpendicular to their axis. In this manner, they can be inserted in the holes 6 of the expansion 5 without preliminary orientation, since their active part, i.e., the part that contributes to increase the resistance of the lock to effraction attempts, is only the part directed toward the plug 4.
  • An axial keyway 16 is formed in the plug 4 and intersects a plurality of radial holes 17.
  • the holes 17 are equal in number and diameter to the blind holes 6 and are mutually spaced so that in a given angular position of the plug, which corresponds to the position for the insertion and extraction of the key with respect to the lock, they are aligned with the blind holes 6.
  • Coding pins 18 are accommodated in the holes 17 and are constituted by small cylinders which have a conical end 19 arranged inside the plug and a reduced-diameter external end 20 which is directed toward the peripheral region of the plug.
  • the coding pins 18, by cooperating with the driver pins 8, 9 and 11, lock or release the rotation of the plug.
  • the penetration of the driver pins 8, 9 and 11 in the holes 17 is determined by the abutment of the conical ends 19 against the bottom 21 of the holes 17, which protrude radially into the plug 4.
  • driver pin 8 which cooperates with the coding pin 18, does not have a reduced-diameter portion, so as to eliminate any plays of the plug 4 in its seat 3 and ensure the alignment of the remaining coding pins with the respective driver pins and allow them to slide, during the insertion and extraction of the key, without making the coding pins and the driver pins strike against the edges of the holes 6 and 17.
  • opening occurs in a conventional manner.
  • the coding pins 18 are in fact shifted according to the code, so that the point of contact 22 between the coding pins 18 and the driver pins 8, 9 and 11 coincides with the shearing plane 23 between the seat 3 and the plug 4, so that the locking action of the driver pins 8, 9 and 11 ceases and the plug 4 can rotate freely and operate the bit that moves the bolt or spring-latch.
  • the sum S of the lengths of the coding pins and of the driver pins is constant and so is the sum R of the diametrical reductions 15 and 20.
  • the described invention can also be used in so-called flat-key locks shown in figure 7, where the key code is not formed along an edge of the key but on a lateral face thereof.
EP97121142A 1996-12-05 1997-12-02 Serrure cylindrique avec ensembles à goupilles anti-effractions améliorées Withdrawn EP0846819A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITBO960635 1996-12-05
IT96BO000635A IT1286809B1 (it) 1996-12-05 1996-12-05 Serratura a cilindro con perni antieffrazione perfezionati

Publications (1)

Publication Number Publication Date
EP0846819A1 true EP0846819A1 (fr) 1998-06-10

Family

ID=11341764

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97121142A Withdrawn EP0846819A1 (fr) 1996-12-05 1997-12-02 Serrure cylindrique avec ensembles à goupilles anti-effractions améliorées

Country Status (2)

Country Link
EP (1) EP0846819A1 (fr)
IT (1) IT1286809B1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006066549A2 (fr) * 2004-12-23 2006-06-29 Schliessanlagen Gmbh Pfaffenhain Cylindre de fermeture
GB2506580A (en) * 2012-08-15 2014-04-09 Christopher Eric Belcher Pin tumbler lock resistant to picking
US11536047B1 (en) 2022-08-22 2022-12-27 Winloc Ag Key plug, a cylinder lock, a cylinder lock and key combination and a method to manufacture a key plug
US11542724B1 (en) 2022-08-22 2023-01-03 Winloc Ag Key blank, a key, and a cylinder lock and key combination
US11613909B1 (en) 2022-08-22 2023-03-28 Winloc Ag Key blank, a coded key and a cylinder lock and key system with improved stop arrangement

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1593513A (en) * 1923-05-23 1926-07-20 American Hardware Corp Lock
US2051772A (en) * 1935-12-10 1936-08-18 Edward A Berk Safety lock construction
US2687640A (en) * 1952-10-25 1954-08-31 Mir Antonio Juan Cylinder lock
US3656328A (en) * 1970-06-03 1972-04-18 Benjamin F Hughes Lock assembly
US3762193A (en) * 1971-11-09 1973-10-02 R Hucknall Pick-resistant lock
EP0092812A1 (fr) * 1982-04-26 1983-11-02 Neiman S.A. Serrure à goupilles

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1593513A (en) * 1923-05-23 1926-07-20 American Hardware Corp Lock
US2051772A (en) * 1935-12-10 1936-08-18 Edward A Berk Safety lock construction
US2687640A (en) * 1952-10-25 1954-08-31 Mir Antonio Juan Cylinder lock
US3656328A (en) * 1970-06-03 1972-04-18 Benjamin F Hughes Lock assembly
US3762193A (en) * 1971-11-09 1973-10-02 R Hucknall Pick-resistant lock
EP0092812A1 (fr) * 1982-04-26 1983-11-02 Neiman S.A. Serrure à goupilles

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006066549A2 (fr) * 2004-12-23 2006-06-29 Schliessanlagen Gmbh Pfaffenhain Cylindre de fermeture
DE102004063395A1 (de) * 2004-12-23 2006-07-13 Schliessanlagen Gmbh Pfaffenhain Schließzylinder
WO2006066549A3 (fr) * 2004-12-23 2007-01-18 Schliessanlagen Gmbh Pfaffenha Cylindre de fermeture
GB2506580A (en) * 2012-08-15 2014-04-09 Christopher Eric Belcher Pin tumbler lock resistant to picking
GB2506580B (en) * 2012-08-15 2017-05-31 Eric Belcher Christopher Improvements to key-operated pin tumbler locks
US11536047B1 (en) 2022-08-22 2022-12-27 Winloc Ag Key plug, a cylinder lock, a cylinder lock and key combination and a method to manufacture a key plug
US11542724B1 (en) 2022-08-22 2023-01-03 Winloc Ag Key blank, a key, and a cylinder lock and key combination
US11613909B1 (en) 2022-08-22 2023-03-28 Winloc Ag Key blank, a coded key and a cylinder lock and key system with improved stop arrangement

Also Published As

Publication number Publication date
ITBO960635A1 (it) 1998-06-05
IT1286809B1 (it) 1998-07-17
ITBO960635A0 (it) 1996-12-05

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