Class / Patent application number | Description | Number of patent applications / Date published |
070337000 | Multiple keys | 9 |
20160097219 | TWO-PIECE KEY ASSEMBLY - A key assembly is disclosed. The key assembly may have a blade with a head portion, a shank, and a transition region connecting the head portion to the shank. The key assembly may also have a head configured to receive the blade. The head may have a shoulder located at the transition region to limit engagement of the head with the blade, and at least one tang located at an end of the head opposite the shoulder. The at least one tang may be configured to engage a recess located within a side of the head portion and inhibit removal of the head from the blade. | 04-07-2016 |
070338000 | Selective shutout type | 1 |
20090241619 | Latch Lock - A latch lock having a latch which is arranged so as to be displaceable against spring force in a lock case that can be fastened to a wall, door leaf, or the like, having a first locking cylinder whose thumb draws the latch back against spring force when the cylinder core is rotated by a key. The locking cylinder is constructed in such a way that it allows the key to be pulled out only in a determined position of the cylinder core with reference to the cylinder housing such as in the locking position. According to the invention, a second locking cylinder is arranged in the lock case and coupled with the first locking cylinder such that, when rotated by means of a key, its thumb moves the first locking cylinder into the determined position in which the key can be extracted from the first locking cylinder. | 10-01-2009 |
070339000 | Interdependent | 1 |
20140130556 | Two-keyed anti-destructive clutch lock core - A lock core includes a rotation mechanism and a clutch mechanism for separating the unlocking and opening processes of locks and prevents the lock from being unlocked destructively. The rotation mechanism comprises a plug and a plug sleeve. The clutch mechanism comprises a group of discs and a sidebar. The rotation mechanism is triggered by the clutch mechanism. Therefore the primary key for the clutch mechanism locks/unlocks the rotation mechanism. A secondary key is introduced for turning the rotation mechanism to open the lock core. The primary key and the secondary key are combined by another mechanism comprises two slots, two rivets and a spring. | 05-15-2014 |
070340000 | Master- and change-key | 6 |
20080271505 | KEYING SYSTEM AND METHOD - A kit for a master keying system includes a plurality of replacement master racks. A rack removal key is provided for insertion into a keyway. The rack removal key has a first cut defining a first lift amount. A rack removal tool is provided for insertion into the keyway. The rack removal tool has a second cut defining a second lift amount, wherein the second lift amount is greater than the first lift amount. | 11-06-2008 |
20090272159 | Positional multiplex keyway system - A method and apparatus for extending an existing simplex or multiplex lock-and-key system that includes a family of first keys each having a first profile and of a corresponding plurality of first locks each operable by a first key and each having a first keyway configured for accepting the first key profile. Second keys of a new family are defined with a core section corresponding to the first key profile and a narrowed projection extending from the bottom of the core section. Corresponding second locks have a second keyway profile defined as the compliment of the second key profile, thus including a complimentary core section and a foot recess extending from the bottom of the second keyway core section. The second locks accept a second key positioned at the second keyway baseline to normally lift the lock pin stacks and operate the second lock. The second locks also accept the first keys but the first keys cannot enter the narrowed foot recess of the second keyway and are accordingly elevated in the second keyway above the keyway baseline, and are therefore unable to normally lift the lock pin stacks to operate the second lock. | 11-05-2009 |
20100206025 | MASTER KEY LOCK, SYSTEM AND METHOD - A master key lock includes a lock cylinder having a keyway for receiving a key, a sleeve about the cylinder, a plurality of wafer tumblers, a master key and means for axially moving the sleeve relative to the cylinder when the master key is inserted into the keyway. A system that uses the master key lock includes a lock case wherein the sleeve is disposed between the cylinder and the lock case, the sleeve being axially movable within the case. The sleeve comprises a plurality of transversely disposed slots for engaging the plurality of wafer tumblers such that the lock is unlocked by insertion of a key or a master key. The invention also provides for a method of using the master key lock. | 08-19-2010 |
20100288002 | LOCK APPARATUS - A lock apparatus includes an unlocker. The unlocker unlocks when a coincidence condition is satisfied between: one or at least two registration keys including a master key; and an input key. An adder adds, as the registration key, a desired key when a key adding manipulation is performed in an unlocked state. A controller determines whether or not the unlocking by the unlocker results from a coincidence between the master key and the input key, and starts the adder corresponding to a positive determination result while stops the adder corresponding to a negative determination result. | 11-18-2010 |
20120060571 | Dual Key Bi-Step Lock - A dual key bi-step lock having a shell and a cylindrical plug in the shell. The plug has a primary keyway and a secondary keyway and at least one set of primary pin stack and at least one set of secondary pin stack between the shell and the plug, respectively coupling with the primary and the secondary keys. a longitudinal stage is formed on a cylindrical surface of the plug. An involute side face extending from the stage to the cylindrical surface of the plug. The primary key is able to dive the plug to a position of first step open at which the stage is stopped by the key pin of the secondary pin stack. The secondary pin stack is unlocked by the secondary key and the plug is able to be further driven to a position of second step open by the primary and the secondary keys from the first step open. | 03-15-2012 |
20130192320 | LOCK SYSTEM - A lock system is disclosed. The lock system includes a lock and one or more keys. The lock includes a plurality of tumblers configured for interaction with associated key features. A tumbler includes at least two sections and defines at least two contact points. One contact point is configured to interact with a feature included on either of an operator key or a master key, while the other contact point is configured to interact with a feature included on a separate key. A key according to the present disclosure includes features configured to interact with a contact point on each tumbler, such as with only one of the two contact points. One of the keys may include channels defined on surfaces thereof. Such channels accommodate the set of contact points that the features of such key are not interacting with, allowing access to and interaction with the appropriate set of contact points. | 08-01-2013 |