WO1990013721A1 - Mecanisme et procede pour serrure a combinaison - Google Patents

Mecanisme et procede pour serrure a combinaison Download PDF

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Publication number
WO1990013721A1
WO1990013721A1 PCT/US1990/002235 US9002235W WO9013721A1 WO 1990013721 A1 WO1990013721 A1 WO 1990013721A1 US 9002235 W US9002235 W US 9002235W WO 9013721 A1 WO9013721 A1 WO 9013721A1
Authority
WO
WIPO (PCT)
Prior art keywords
combination
bar
push
locking
bars
Prior art date
Application number
PCT/US1990/002235
Other languages
English (en)
Inventor
Sung Bong Kim
Original Assignee
Sung Bong Kim
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 Sung Bong Kim filed Critical Sung Bong Kim
Publication of WO1990013721A1 publication Critical patent/WO1990013721A1/fr

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B37/00—Permutation or combination locks; Puzzle locks
    • E05B37/16—Permutation or combination locks; Puzzle locks with two or more push or pull knobs, slides, or the like
    • E05B37/163—Permutation or combination locks; Puzzle locks with two or more push or pull knobs, slides, or the like the knobs being pushed in a prescribed sequence

Definitions

  • the present invention relates to the field of combination locking mechanisms for use with doors. More specifically, the present invention relates to the field of combination locking assemblies having simplified combination changing procedures and associated mechanisms, and greater durability.
  • the present invention is directed at improving upon previously existing combination locking mechanisms.
  • An example of a prior art type combination locking assembly is disclosed in U.S. patent 4,827,743.
  • This locking assembly included several advantages over previous locking assemblies.
  • the improved combination setting assembly and corresponding structure enabled simplified combination settings for a relatively complex locking assembly.
  • the push buttons of the combination mechanism had substantially the same feel whether the selected number was a correct or incorrect number.
  • the assembly also enabled the use of a single digit for repeated use in a selected combination.
  • the present invention sets forth several improvements.
  • the locking mechanism on the whole includes fewer and substantially simplified moving parts. This feature alone not only shortens assembly and general manufacturing time, but also improves associated durability owing to the decreased number of potential failures caused by excessive complexity.
  • the present invention includes an improved combination setting assembly wherein more rapid and reliable combination setting changes may be performed. Further, the present locking assembly retains the previously improved features of multiple use of a single combination number, as well as substantially equal feel between the correct and incorrectly selected buttons of the combination.
  • Fig. 1 is an elevational view of the interior side of a door with a combination lock of the present invention in place.
  • Fig. 2 is an elevational view of the exterior side of the door illustrated in Fig. 1.
  • Fig. 3 is exploded isometric view of the combination lock of the present invention.
  • Fig. 4 is a side elevational view, in cross section, of the combination lock assembly taken along line 4-4 of Fig. 2.
  • Fig. 5 is a plan view, in cross section, of the combination lock taken along line 5-5 of Fig. 4.
  • Fig. 6 is an elevational view of the first combination bar with a combination slide ready to be mounted thereon.
  • Fig. 7 is an elevational view of the second combination bar with a combination slide ready to be mounted thereon.
  • Fig. 8 is an elevational view of the third combination bar with a combination slide mounted thereon.
  • Fig. 9 is an elevational view of the fourth combination bar with a combination slide ready to be mounted thereon.
  • Fig. 10 is a side elevational view, in cross section, of the prohibition assembly taken along line 10-10 of Fig. 5.
  • Fig. 11 is an isometric view of a push bar used for the push buttons of the left-most button column of Fig. 2.
  • Fig. 12 is an isometric view of a push bar used for the push buttons of the center button column of Fig. 2.
  • Fig. 13 is an isometric view of a push bar used for the push buttons of the right-most button column of Fig. 2.
  • Fig. 14 is a cross sectional view of the combination lock assembly taken along line 14-14 of Fig. 5.
  • Fig. 15 is an isometric view of the increment bar and associated advance bar.
  • Fig. 16 is an isometric view of the clear bar and associated clear push bar.
  • Fig. 17 is an elevational view of the locking bar and associated combination bar, advance bar, and clear bar.
  • Fig. 18 is an isometric view of the locking disc with associated spring and mounting shaft.
  • Fig. 19 is an elevational view of the locking disc and the locking bar set in an unlocked position.
  • Fig. 20 is an isometric view of the back cover of the combination lock with the combination bars shown in broken lines.
  • a combination lock in accordance with the present invention is shown in Figs. 1 and 2 and is designated generally by the reference number 31.
  • the combination lock 31 is installed in a door 33 of conventional design and includes an exterior side (Fig. 2) with an exterior base plate 35 and an exterior door knob 37.
  • a plurality of user-depressible numeric push buttons 39, labeled 0 through 9, and a separate clear button 41, label "c" extend through appropriate clearance openings in the exterior base plate 35.
  • the push buttons 39 are depressible in a user-determined access combination or sequence to effect unlocking of the combination lock 31.
  • the clear button 41 functions to clear or reset the combination lock 31 in the event that an incorrect push button 39 is accidentally depressed.
  • the exterior door knob 37 can be rotated to retract a spring bolt (or dead bolt) 43 from a cooperating latch plate (not shown) to allow opening of the door 33.
  • the interior side of the door 33 (Fig. 1) includes an interior cover 45 with a slidable back cover 47 and an interior door knob 49.
  • the back cover 47 is held in place by channels 51 along which cover 47 can slide sideways (see Figs. 2, 3, and 4).
  • the back cover 47 is kept in its closed position by a threaded fastener 53.
  • the exterior base plate 35 and the interior cover 45 are mounted on the door 33 in general registration with one another.
  • the base plate 57 is mounted between the interior cover 45 and the interior door surface.
  • the exterior door knob 37 and interior door knob 49 are mounted on a common axis below the combination lock mechanism.
  • the interior cover 45 and the exterior base plate 35 are connected by threaded fasteners 59 passing through clearance bores (unnumbered) in the base plate 57 and clearance bore 61 in the door.
  • the fasteners engage corresponding threaded studs 63 which extend normally from the interior side of the exterior base plate 35.
  • the interior door knob 49 is secured to an interior knob shaft 65.
  • Shaft 65 is rotatably mounted in the interior cover 45 in an appropriate clearance bore and is retained in place by an E-ring 67.
  • the exterior door knob 37 is secured to an exterior knob shaft 69.
  • Shaft 69 is rotatably mounted in the knob disc (unnumbered) in an appropriate clearance bore and retained in place by an E-ring 71.
  • a mounting shaft 73 is rotatably mounted in the base plate 45 in an appropriate clearance bore and is retained in position by an E-ring 75.
  • a square tube 77 is pressure fit into the central bore of the interior knob shaft 65.
  • the tube 77 extends through the generally circular bore in the center of the locking disc 79, through the center of mounting shaft 73, bore 81 (in the door), through square bore 83 (in a conventional bolt assembly) , and finally into the square bore in exterior knob shaft 69 (Fig. 2) .
  • an unlocking tab 85 is rotatable installed in the center of the interior door knob 49.
  • the inside end of the unlocking tab 85 extends through the oval hole 87 in spindle 89.
  • Spindle 89 extends axially through square tube 77.
  • Pin 91 having a triangular head (see Fig. 3) , extends radially through slot 93 in the square tube 77.
  • the pin 91 and slot 93 are positioned so that when the lock is assembled, pin 91 will fit into a notch 95 on the locking disc 79 (see Fig.
  • mounting shaft 73 includes a core shaft 97 with a square hole in the center so as to accommodate square tube 77.
  • a tab 99 projects from the extended circumference of the mounting shaft 73.
  • Tab 99 includes a rectangular bore passing therethrough.
  • Shaft 73 also includes a pair of apertured tabs 101 positioned oppositely from tab 99. Apertured tabs 101 extend through parallel slots 103 in the locking disc 79 (Fig. 3).
  • the bottom end 105 of the locking disc 79 is received into the rectangular bore in the tab 99 of the mounting shaft 73.
  • a center portion 107 of the locking disc, between parallel slots 103, is bent to reach the mounting shaft 73 and rests against a return spring 109.
  • the return spring 109 is mounted on the core shaft 97 between the mounting shaft 73 and locking disc 79, and is anchored on a pair of studs 111 (Figs. 18 and 5) .
  • the return spring 109 extends further to be anchored again on studs 113 of the base plate 57 so as to urge the mounting shaft 73 to its initial position.
  • a pin 115 extends through the apertures in tabs 101 so as to keep the locking 79 disc in place, but at the same time allowing the locking disc 79 to slide up and down against the return spring 109.
  • the locking disc 79 includes a center bore (unnumbered) large enough for the locking disc 79 to move freely up and down.
  • the opposite side of the locking disc 79 (opposite end 105), includes an extended portion 117.
  • the distal end of the extension 117 includes a pair of circularly curved rectangular tabs 119 bent towards base plate 57.
  • a slot 121 is positioned between the tabs 119 so as to receive the lower end of the locking bar 123. (Note, locking bar 123 moves up and down in its two pairs of guiding tabs 125 and 127, in a manner described later (Figs. 3 and 17) ) .
  • buttons 39 Another method of unlocking the door is to enter the correct sequence and combination of numbers into the keypad comprised of buttons 39.
  • the locking bar 123 is pulled upwardly and out of slot 121.
  • the locking disc 79 is allowed to rotate freely, thereby allowing the door to be opened by the retraction of bolt 43.
  • eleven push buttons extend through the clearance bores provided in exterior base member 35.
  • the push buttons are arranged generally as shown in Fig. 2.
  • the generally T-shaped push bar 131 includes a stem 133 that is pressure fit in a suitable bore 135 in the push button 39. Opposite to the stem end of the push bar are the first and second force transmitting surfaces 137 and 139. Each of the force transmitting surfaces is a sloped surface, for purposes which will be described later. Generally, however, surface 137 prevents simultaneous depression of a plurality of the push buttons, and surface 139 incrementally urges the combination bars 141, increment bar 143, and advance bar 145, upwardly upon a depression of a push button.
  • a spiral spring 147 is provided on the stem 133 of the push bars so as to urge the push buttons into their fully extended positions.
  • the push bars for the left most column of buttons (buttons 1, 4, and 7) are shown in Fig. 11.
  • the push bar includes a shoulder portion 149, and a stem 133 onto which a push button is pressure fit.
  • the push bar structure of the right most column of buttons (buttons 3, 6, 9, and 0) is shown in Fig. 13.
  • the structures for the respective left, center, and right push buttons when assembled are such that their respective force transmitting surfaces are arranged in an overlying parallel relationship.
  • the push buttons 39 and push bars 131 are mounted between the base plate 57 and an intermediate mounting plate 151. Plate 151 is secured by threaded fasteners 153 to receiving studs 155.
  • Studs 155 are integrally formed on the exterior surface of the base plate 57.
  • the force transmitting surfaces 137 and 139 of the push bars pass through appropriately sized clearance bores in base plate 57.
  • the digit push bars 131, clear push bar 157, and the intermediate mounting plate 151, extend through bore 61 in the door toward the exterior side of the door (as shown in Fig. 3) .
  • a plurality of combination bars 141 are mounted on the base plate 57. Bars 141 are mounted vertically with their upper portions received in the clearance slots (unnumbered) in upper support wall 163 engaging pin 167, and their lower portion received in the clearance slot (unnumbered) in the lower support wall 165. Pins 167 and 169 are provided through the clearance bores (unnumbered) in the side walls, 171 and 173 respectively, to keep the combination bars 141 in place (Figs. 3 and 5) .
  • the combination slide 161 includes a bridge 175, a curved plate spring 177, a second bridge 179, and a force receiving surface 181.
  • the plate spring 177 is inserted into the inner channel (unnumbered) of the combination slide 161 through the clearance bore 183 and pressure fit onto the bridge 175 at its top end.
  • the second bridge 179 engages one of the slots 183.
  • the combination slide 161 is pushed down manually (in the direction shown by the arrow) against the plate spring 177, the second bridge 179 will be pushed to disengage the slot 183 and the slide 161 is freed to move on the combination bar.
  • the combination bar also includes platforms 187 and 188 in its lower part.
  • the height of the platforms 187 from the base plate 57 decreases one after another across the successive sequentially actuated combination bars.
  • the height of the platforms 188 from the base plate 57 is the same on all the combination bars. Bridging across platforms 187 is a common panel 189 (Figs. 3, 4 and 14). As shown in Fig.
  • the common panel 189 includes top bridge 191 and a pair of apertured tabs 193 and leg 195 that is bent toward base plate 57.
  • a pin 197 ( Figure 5) is provided to rotatably mount the common panel 189 on the base plate 57, and extends through the clearance bores in the side support walls 199 and the clearance bore in the apertured tabs 193.
  • a torsion spring 201 is mounted on a pin 197 to urge the top bridge 191 toward the base plate 57.
  • An increment bar 143 is mounted on the base plate 57 in a similar manner (Figs. 3 and 5) parallel to the combination bars.
  • the increment bar 143 includes a plurality of sloped ramp surfaces 203 (Fig.
  • each corresponding to each push bar 131 Each of the ramp surfaces 203 complements and interacts with the force transmitting surface 139 on each push bar 131.
  • depression of any push button 39 as shown by an arrow in Fig. 4, will cause the associated push bar 131 to advance towards and increment the increment bar 143.
  • the push bar 131 retracts so as to allow the increment bar 143 to return to its initial position by a coil spring 207.
  • the advance bar 145 is mounted on the base plate 57 for reciprocating movement.
  • the advance bar 145 includes a top surface 211, a sloped surface 213, a toothed rack 215 and an extension arm 217.
  • the height of the top surface 211 from the base plate 57 is exactly the same as that of the highest platform 187(a) on the combination bar 141.
  • the common panel 189 in its initial position, rests on both the top surface 211 and the platform 187(a).
  • the height of the bottom of the sloped surface 213 from the base plate 57 is exactly the same as that of the platform 188.
  • An advance pawl 219 is pivotally carried on the side of the increment bar 143 at its lower end and engages the toothed rack 215 on the advance bar 145.
  • a coiled return spring 221 is anchored on the extension arm 217 to urge the advance bar 145 to its initial position.
  • a restraining pawl 223, pivotally mounted on a support wall surface 225 (Fig. 5) also engages the toothed rack 215 on the advance bar 145.
  • Torsion springs 227 and 229 are provided on the mounting pins 231 and 233 to urge the advance pawl 219 and the restraining pawl 223 onto the toothed rack 215.
  • the advancing push bar 131 will also engage the force receiving surface 181 at its force transmitting surface 139 and cause the combination slide 161 to translate upwardly. Since the position of the combination slide 161 relative to the combination bar 141 is fixed, the combination bar 141 moves upwardly with the combination slide 161. When the combination bar 141 with the highest platform 187(a) has made enough upward movement, the edge 235 clears the bottom edge of the top bridge 191 of the common panel 189 (Fig. 6) , and the common panel 189 is allowed to drop down onto the next highest platform 187(b).
  • the combination bar 141 with the highest platform 187(a) is maintained in the newly translated upward position by the common panel 189.
  • the advance bar 145 with its sloped surface 213 will be allowed to translate ' incrementally as the common panel 189 rides down the sloped surface 213.
  • the common panel again drops down onto the next highest platform 187(c) and the combination bar with the platform 187(b) is maintained in its newly incremented upward position by the common panel 189. This process continues until the combination bar 141 with the lowest platform 187(d) is moved and maintained in its upward position.
  • the locking bar 123 is slidably mounted on the base plate 57 as described above and kept in place by the pins 237 and 239.
  • the locking bar 123 includes a sloped surface 241 at its lower end, shoulder surface 243 along the middle portion and a top end tab 245.
  • the top end tab 245 extends through the opening 247 in the lower end of the combination bar 141 and engages the inner wall 249 (Figs. 9 and 17) .
  • the force transmitting surface 139 will actuate only the increment bar 145 to incrementally move the advance bar 145 but no combination bar 141 will also move upwards.
  • the top end of the advance bar 145 makes incremental upward movements regardless of whether the right or wrong button was depressed.
  • the combination bar 141 with the lowest platform 187(d) will remain in its initial position and the door remains locked.
  • the common panel 189 will only be allowed to drop to the next highest platform only if, 1) all of the sequentially previous combination bars 141 with higher platforms were moved upwards and, 2) the common panel was at the right place along the sloped surface 213, the combination digits must be pushed in the correct sequence.
  • the second requirement of the above statement can be better understood by the extreme example of a combination number 2, 2, 2, 2.
  • all of the combination slides 161 are fixed in front of the second push bar 131.
  • the push bar will engage all of the combination slides 161 simultaneously, and all of the combination bars 141 will be pushed upwards. Since all of the combination bars are in their upward position, the common panel 189 would likely drop down all the way to the lowest platform 188. However, one end of the common panel also rides on the sloped surface 213 as shown in Figs. 14 and 17.
  • the advance bar 14-5 has made only one incremental move and the height of the common panel on the sloped surface 213 is only equal to the second highest platform 187(b) on the combination bar 141.
  • the common panel can drop down only to the height of the second highest platform (b) locking only the combination bar with the highest platform 187(a) in its newly upward position.
  • the rest of the combination bars will return to their initial position when the button is released, preventing the user from unlocking the door with one push button actuation.
  • the first problem is that one can unlock the door by pushing each of the push buttons 39 one after another, each time turning the door knob while holding the push button down. In this process, one of the push buttons 39 will actuate the combination bar 141 with the lowest platform 187(d) which will pull the locking bar 123 upwards. By holding down the push button, the locking bar 123 stays clear of the slot 121 and the door can be opened.
  • the second problem is that the door can be opened by repeatedly pushing all the push buttons simultaneously until the door opens. When all the push buttons are pushed together, at least one of them will actuate one combination bar.
  • the combination bars 141 with the third highest platform 187(c) and the lowest platform 187(d) are modified as below.
  • the combination bar with the platform 187(c) includes a compression spring 255 mounted on a projecting pin 257.
  • the combination bar with the platform 187(d) includes an extension arm 259 that extends horizontally through the opening 261 in the combination bar with the platform 187(c) and engages the spring 255 (Fig. 4).
  • the position of the combination slide 161 on the combination bar with the platform 187(d) relative to the force transmitting surface 139 is different from the others.
  • Figs. 4 and 5 show the position of the combination slides for the opening combination number 1, 5, 1, 5.
  • the combination slide 161 on the combination bar with the platform 187(d) is lower than the position to engage the force transmitting surface 139. Depressing the number 5 button can actuate only the combination bar with the platform 187(b) but not the one with the lowest platform 187(d) .
  • the combination slide 161 on the combination bar with the platform 187(d) will come into the position to engage the force transmitting surface 139 only after the combination bar with the platform 187(c) is moved and maintained in an upward position. In that event, the spring 255 moves upwardly and moves the combination bar with the lowest platform 187(d) into the position to engage its corresponding push bar.
  • the top end 245 of the locking bar 123 will also come to engage the inner wall 249 at that time so that further upward movement of the combination bar will start moving the locking bar 123.
  • a plurality of prohibition bars 159 are used. As shown in Fig. 10, the prohibition bars 159 are stacked vertically one atop another in the channel (unnumbered) integrally made on the base plate 57. When a push button 39 is pushed, the force transmitting surface 137 pushes the .corresponding prohibition bar 159. It is obvious in Fig. 10 that none of the push bars above or below the one already depressed can advance toward the back cover 45.
  • a torsion spring 263 (Fig. 5) is provided to return the prohibition bars 159 when the push bar retracts.
  • the clear button 41 can be used to reset the lock.
  • the clear bar 265 is mounted for pivotal movement on the pin 197 and guided by a slot (unnumbered) in the lower support wall 165 (Fig. 5) .
  • the clear push bar 157 includes a clearance opening 267 for engagement with the clear bar 265.
  • the clear button 41 is pressure fit on the opposite end of the clear push bar 157 from the clearance opening 267.
  • a spiral spring (unnumbered) is provided against the intermediate mounting plate 51 to urge the clear push bar 157 and the clear bar 265 to their initial position.
  • the clear bar 265 includes three parallel clear arms 269, 271 and 273. These arms are positioned so as to be over the common panel 189, advance pawl 219, and restraining pawl 223 respectively.
  • the clear button 41 When the clear button 41 is depressed, the clear bar 265, as shown in Figs. 5 and 16, pivots and the clear arms 271 and 273 push the pawls 219 and 223 to disengage from the toothed rack 215.
  • the advance bar 145 will be forced back to its initial position by urge of the spring 221.
  • the lock will also reset every time the door knob is turned. As shown in Fig. 17, when the user turns the exterior door knob, the locking disc 79 will rotate with the top of the rectangular tab 119 rotating against the sloped surface 241. The locking bar 123 will then be pushed upwards. The shoulder surface 243 pushes the leg 195 of the common panel 189. The common panel 189, in turn, lifts up the clear arm 269, pivoting the entire clear bar 265 in the direction shown by arrows in Fig. 16. The result is the same as pushing the clear button 41 and the lock resets.
  • the combination number can be changed by sliding the back cover 47 and moving the combination slides to the desired positions.
  • the back cover 47 includes a pair of tabs 275 which slide in the direction shown by the arrow in Fig. 20 as the back cover slides.
  • the tabs 275 are blocked by the combination bar 141 and the back cover can not be slid open.
  • the slots 277 will move into a position to allow the tabs 275 to pass through.
  • the back cover 47 can be slid open only after the correct combination has been entered and all of the combination bars 141 have been moved upwardly.
  • the back cover 47 is opened the combination slides are presented to the user.
  • index numbers 279 on the back cover the user can move the combination slides to the desired position which will result in a new combination unlocking number as described abov .

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Abstract

Un ensemble de serrure à combinaison (31) ayant une construction simplifiée et robuste est muni d'éléments coulissants (161) pouvant être mis en place facilement afin de régler la combinaison. Des barres de combinaison (141), une barre incrémentielle (143), et une barre d'avancement (145) coopèrent pour empêcher qu'un verrou (123) se déplace vers une position de déblocage sauf si les boutons (39) correctes ont été enfoncés séquentiellement dans le bon ordre. Lorsque les boutons (39) corrects sont enfoncés séquentiellement, les barres de combinaison (141) sont menées individuellement à avancer vers une position de translation. Un panneau commun (189) est prévu, celui-ci coopérant avec des crans (187, 188) dans les barres de combinaison (141) afin de maintenir les barres de combinaison (141) en position avancée jusqu'à la dépression du dernier bouton (39) de la combinaison séquentielle correcte, ceci déplaçant le verrou (123) vers sa position de déblocage.
PCT/US1990/002235 1989-04-28 1990-04-24 Mecanisme et procede pour serrure a combinaison WO1990013721A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US334,802 1981-12-28
US34380289A 1989-04-28 1989-04-28

Publications (1)

Publication Number Publication Date
WO1990013721A1 true WO1990013721A1 (fr) 1990-11-15

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PCT/US1990/002235 WO1990013721A1 (fr) 1989-04-28 1990-04-24 Mecanisme et procede pour serrure a combinaison

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2281589A (en) * 1993-09-02 1995-03-08 Joan Margaret Brown A child-proof lock for a cupboard
WO1996002720A1 (fr) * 1994-07-15 1996-02-01 Milan Plchot Serrure pour bagages a main
WO1998011317A1 (fr) * 1996-09-13 1998-03-19 Reynolds (Uk) Limited Serrures
FR2780173A1 (fr) * 1998-06-22 1999-12-24 Jacques Paul Breton Mecanisme d'autorisation d'un mouvement d'un organe de commande par composition d'un code

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1871303A (en) * 1928-05-31 1932-08-09 Sanford C Chesick Lock
US2029080A (en) * 1934-04-26 1936-01-28 George E Mills Combination lock
US2536429A (en) * 1947-01-17 1951-01-02 John J Dury Step-by-step combination door locking mechanism
US2750786A (en) * 1948-03-26 1956-06-19 Sanowskis Albert Combination lock
US3667261A (en) * 1971-01-08 1972-06-06 Time Research Dev Corp Push button door lock
US3751951A (en) * 1972-03-10 1973-08-14 J Gridley Push-button door lock
US4274272A (en) * 1978-09-22 1981-06-23 Wang David T Mechanical digital lock
US4627250A (en) * 1984-05-22 1986-12-09 Kim Sung B Combination lock
US4827743A (en) * 1988-07-21 1989-05-09 Kim Sung B Combination lock

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1871303A (en) * 1928-05-31 1932-08-09 Sanford C Chesick Lock
US2029080A (en) * 1934-04-26 1936-01-28 George E Mills Combination lock
US2536429A (en) * 1947-01-17 1951-01-02 John J Dury Step-by-step combination door locking mechanism
US2750786A (en) * 1948-03-26 1956-06-19 Sanowskis Albert Combination lock
US3667261A (en) * 1971-01-08 1972-06-06 Time Research Dev Corp Push button door lock
US3751951A (en) * 1972-03-10 1973-08-14 J Gridley Push-button door lock
US4274272A (en) * 1978-09-22 1981-06-23 Wang David T Mechanical digital lock
US4627250A (en) * 1984-05-22 1986-12-09 Kim Sung B Combination lock
US4827743A (en) * 1988-07-21 1989-05-09 Kim Sung B Combination lock

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2281589A (en) * 1993-09-02 1995-03-08 Joan Margaret Brown A child-proof lock for a cupboard
WO1996002720A1 (fr) * 1994-07-15 1996-02-01 Milan Plchot Serrure pour bagages a main
WO1998011317A1 (fr) * 1996-09-13 1998-03-19 Reynolds (Uk) Limited Serrures
FR2780173A1 (fr) * 1998-06-22 1999-12-24 Jacques Paul Breton Mecanisme d'autorisation d'un mouvement d'un organe de commande par composition d'un code
WO1999067485A1 (fr) 1998-06-22 1999-12-29 Jacques Paul Breton Mecanisme d'autorisation d'un mouvement d'un organe de commande par composition d'un code

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