Tynax ~ Patent Library

Patent for Sale:

Device for Shutting Off Power Supply to Electrical Equipment in Flammable/Explosive Places - Coal Mine    

A signal is sent out to a safety and monitoring unit to cut off the power supply and provide an alarm before screwing off a screw on a cover plate of electrical equipment.


The patent provides a monitoring and protection unit for use in environments that are potentially explosive or flammable and electrical equipment needs to be employed for maintenance or work purposes. For example - for miners working in a coal mine. The objective is to prevent accidental gas explosions.

The patent provides for a motion sensor and wireless communication to sense when a bolt casing has been removed and to automatically shut off electrical power, reducing the risk of the electrical power causing an explosion.

Primary Application of the Technology

Mine Safety Equipment

The seller may consider selling these patents individually.

Additional Information

The technology is practiced in China, where this safety procedure has been adopted.

Patent Summary

U.S. Patent Classes & Classifications Covered in this listing:

Class 340: Communications: Electrical

Communications - the handling of information or intelligence, restricted to the conveying of said information or intelligence between geographically spaced points. Information or intelligence is defined as being, matter which is handled by signaling systems or signaling devices (such as telegraph systems) or by that portion of nonsignaling systems or nonsignaling devices (such as power supply systems) which is designated in the arts as having a control function (such as the supervisory circuits which control the circuit breakers of an electric power network). Handling, as used above, is defined as being the active coaction between the tangible communication system or device and the intangible information or intelligence, and such coaction may assume various forms, such as transmission, storage, exhibiting, etc.

Subclass 687: Connected or disconnected

Class 307: Electrical Transmission Or Interconnection Systems

This is the residual class for all subject matter, not elsewhere classified, relating to electrical transmission or interconnection systems.

Subclass 328: Interlock