Lock key mechanism
OwnerAntonio Domitinventor
Life of this patent
Estimating the term…
Abstract
A key mechanism that makes it possible to fix the key inside the cylinder bolt lock outphased from the original combination, thereby preventing the cylinder of the bolt lock from turning. The security of the key mechanism is also enhanced as a cylinder tumbler engages within a slot of the key blade and the key cannot then be expelled from the cylinder bolt lock. Therefore, it is impossible to insert another key or picklock from the other side of the cylinder bolt lock.
Claims15
A key mechanism for locking and unlocking a cylinder of a bolt lock of the type having tumblers, the key mechanism comprising:
- a key mounting bracket for grasping by a person using said key mechanism;
- a key blade attached to said mounting bracket, said key blade having notches which, together with the tumblers of the cylinder bolt lock, provide a unique combination for opening the cylinder bolt lock;
- said key mechanism having a slot that can be opened and closed by manipulation of said key mechanism so that a respective tumbler of the cylinder bolt lock can fall into said slot when open, and said tumbler can be lifted from said slot during closing of said slot;
- and
- said key mechanism constructed to be insertable into the cylinder bolt lock to a first position wherein the cylinder bolt lock is operable to be locked and unlocked, and insertable to a second position wherein a tumbler of the cylinder bolt lock enters into the open slot in said key mechanism, thereby preventing the key from being removed from the cylinder bolt lock.
A key mechanism for locking and unlocking a cylinder of a bolt lock of the type having tumblers, the key mechanism comprising:
- a mounting bracket;
- a lever pivotally mounted to the mounting bracket;
- a butt member fixed to the mounting bracket;
- a key blade slidingly located partially within the mounting bracket, the key blade being pivotally mounted to the lever;
- and
- a tumbler driver partially located within the mounting bracket and attached to the lever;
- wherein as the key is inserted into a cylinder bolt lock into a first position, the butt member contacts the cylinder bolt lock so that the key is operable in this first position;
- and
- wherein, if the key blade is inserted further into the cylinder bolt lock, the lever pivots further, thereby pushing the key blade further into the cylinder bolt lock and permitting a tumbler to drop into a slot opened between the key blade and the tumbler driver to thereby fix the key mechanism in the cylinder bolt lock.
A key mechanism for locking and unlocking a cylinder of a bolt lock of the type having tumblers, the key mechanism comprising:
- a key bracket having an aperture formed therethrough;
- a key blade inserted into the aperture in the key bracket;
- a tumbler driver in sliding connection with the key blade;
- a T-latch guide attached to the key mechanism;
- and
- a T-latch slidingly attached to the T-latch guide;
- the key mechanism being insertable into the cylinder bolt lock in a first position, wherein the key mechanism is operable to lock and unlock the cylinder bolt lock like a conventional key;
- and
- wherein the key mechanism being further insertable to a second position in the cylinder bolt lock, and pressing downwardly and forwardly on the T-latch to press the T-latch into the key bracket such that a slot opens between the tumbler driver and the key blade and a tumbler of the cylinder is operable to drop into the slot.
Dependencies are inferred from the claim text.