Procedure for operating a locking system for lockable objects
Patent 5790043 Issued on August 4, 1998. Estimated Expiration Date: 
June 30, 2015. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
June 30, 2015. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3812403 Security installation for motor vehicles Remote control system for door locks Passive keyless entry system Electrical key and lock system Motor-vehicle central lock system with transponder in key Patent #: 5561420 InventorsAssigneeApplicationNo. 497598 filed on 06/30/1995US Classes:340/5.62, Including manual switching means70/276, Permanent magnet70/277, Electrical type (e.g., solenoid)307/10.1, Automobile307/10.2, Antitheft340/5.72, Vehicle door340/10.41, Combination response340/10.5, Additional control340/825.69, Radio link340/825.72Wireless linkExaminersPrimary: Horabik, MichaelAssistant: Beaulieu, Yonel Attorney, Agent or FirmForeign Patent References
International ClassesG08C 019/00B60R 025/04 Foreign Application Priority Data1994-06-30 DEAbstractA process to operate a locking system for lockable objects which features a key module having a remote control unit and a transponder for transmitting and receiving coded signals, and a lock module, fitted inside or on the lockable object, comprising a receiver unit for detection of coded signals, an evaluation unit for verification of coded signals, and a control unit for actually carrying out the unlocking or locking operation on the lockable object. A bidirectional data transmission between the key module and the lock module takes place before unlocking or locking of the object. On receiving an unlocking or locking signal sent out by the key module, the lock module will go into a waiting or standby mode and itself send out control signals by use of a transmission unit. When the user approaches the lockable object, one of the control signals will be received and evaluated by the transponder of the key module. The transponder will then transmit a control signal to the lock module activating the control unit to carry out the requested unlocking or locking operation if the proper control signal is received.Other References
Field of SearchRadio linkWireless link Automobile Antitheft Ignition or starting circuit lock Manual code input (e.g., push button) Coded record input (e.g., IC card) Remote control Permanent magnet Electrical type (e.g., solenoid) SYSTEMS Operation and control Central control OPERATING MECHANISM Predetermined time interval controlled | |
