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US 6,604,394 B2Granted
Electronic locking system
AssigneeVidex, Inc.
InventorPaul R. Davis
Life of this patent
Estimating the term…
Abstract
In a first aspect, an electronic lock (12) suitable for replacing interchangeable core locks has a solenoid assembly comprising a solenoid coil (280) and a plunger (290) longitudinally aligned parallel to the rotational axis (A) of the cylinder (214) of the lock (12).
Claims10
An electronic lock, comprising:
- (a) a cylinder housed within and rotatable with respect to a shell;
- (b) an electrically powered locking mechanism capable of selectively interfering with rotation of said cylinder, said locking mechanism including a solenoid having a solenoid coil and a solenoid plunger, said solenoid plunger being in a first position when said lacking mechanism interferes with rotation of said cylinder, and said solenoid plunger being in a second position when said cylinder is free to rotate;
- and
- (c) a ferromagnetic enclosure having an opening for receiving said solenoid plunger, wherein said enclosure encloses said solenoid coil and at least a portion of said solenoid plunger when said solenoid plunger is in said first position and said second position so as to prevent a magnetic field applied externally to a front face of said cylinder from urging said solenoid plunger from said first position to said second position.
1 more element
Dependencies are inferred from the claim text.