Patents by Inventor Manzoor Ali

Manzoor Ali has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Circuit breakers with PTC (Positive Temperature Coefficient resistivity
    Patent number: 5886860
    Abstract: A Positive Temperature Coefficient Resistivity (PTC) element has a resistivity that increases as the temperature increases. Circuit breakers having PTC elements can achieve better overload and short circuit protection than existing products. Breakers with PTC elements can also be combined with ground fault detection circuits to activate the circuit breaker under ground fault conditions that are less severe than the overcurrent conditions that would normally activate the circuit breaker. A shunt trip assembly incorporating a PTC resistor reduces the required power rating of the clearing switch.
    Type: Grant
    Filed: August 25, 1997
    Date of Patent: March 23, 1999
    Assignee: Square D Company
    Inventors: William Weizhong Chen, Colin Cornhill, Andy Haun, Gary Scott, Manzoor Ali, William Rezac, Kevin James Green