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US 7,260,965 B2Granted
Locking device
AssigneeAndamiro Co., Ltd.
InventorChun I. Hung
Life of this patent
Estimating the term…
Abstract
A locking device, which mounts a user key (the first key) and a manager key (the second key) separatedly, places a first lock and a second lock unitedly in an outer cylinder. The first lock is opened or rotated by the first key. After the first lock is open, the first key cannot be pulled out of the locking device. If the second lock is open by the second key, the first key can be pulled out together with the second key.
Claims12
A locking device comprising:
- a first key capable of converting a first lock into an opening state or a locking state;
- a second key insertable through a central key hole in the first key and capable of converting a second lock into an opening state or a locking state;
- the first lock including a first key inserting recess, and which prevents discharge of the first key from the first inserting recess in case that the first key is inserted into the first inserting recess and converts the first lock from the locking state into the opening state absent the second key;
- and
- the second lock including a second key inserting recess, and converting the first lock from the opening state into the locking state in case that the second key is inserted into the second inserting recess and moves the second lock between its locking and opening states,
- wherein the first key can only be discharged from the first inserting recess when the second key is inserted into the second inserting recess and both keys may be removed.
3 more elements
A locking device comprising:
- an outer cylinder having a cylindrical hole in its center, a fixing hole in its one side, and supporting parts and guiding parts which are symmetric to each other in its side;
- a first lock having a cylindrical shape, being inserted into the cylindrical hole of the outer cylinder, having an engaging pole combined to a second lock in one end thereof, and having a second key inserting recess in its center;
- the second lock having an inner cylinder, being inserted into a supporting surface of a supporting part and a guiding part in the outer cylinder, having one end penetrating through an end of the outer cylinder, and having the other end connected to the first lock;
- a first key having a key recess for opening the first lock, and having a central key hole to which a second key penetrates in its center;
- and
- the second key having a key recess for opening the second lock and having a length which passes through the first lock and reaches the second lock,
- wherein when the first key is inserted for opening the first lock, the first key is prevented from discharge from the first lock and the first key can only be discharged from the first lock when the second key is inserted into the second lock and both keys may be removed.
4 more elements
Dependencies are inferred from the claim text.