Gregory George
Gregory George Kratofil, Pittsburgh, PA US
Patent application number | Description | Published |
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20100019075 | HAMMER ASSEMBLY FOR A ROTARY MATERIAL CRUSHER - A hammer assembly for attachment to a rotor of a rotary material crusher. The hammer assembly has an adaptor, having a base portion and a hammer mounting portion, with the base portion being attachable to the rotor at the periphery portion and a hammer, having at least one impact portion, for crushing material, and a mounting portion for engagement with the hammer mounting portion of the adaptor. The hammer mounting portion of the adaptor includes bearing surfaces facing a direction of impact when crushing material, and the mounting portion of the hammer includes bearing surfaces for mating with the bearing surfaces of the hammer mounting portion of the adaptor. The hammer assembly further includes a retainer rod, and at least one retainer pin. The hammer is attached to the adaptor and the retainer rod passes through apertures of the adaptor and apertures of each retainer pin in the direction of the longitudinal axes of the hammer and the adaptor. The size of the retainer rod, the size of the apertures of the adaptor and the size of the aperture of each retainer pin are selected such that the hammer is free to move to enable the bearing surfaces of the hammer to bear on the bearing surfaces of the adaptor and transfer impact forces when impact forces from crushing material are applied, with the retainer rod being free from any of the impact forces. | 01-28-2010 |
Gregory George Romas, Jr., Mckinney, TX US
Patent application number | Description | Published |
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20090040678 | ELECTROSTATIC DISCHARGE TRIGGER CIRCUITS FOR SELF-PROTECTING CASCODE STAGES - Electrostatic discharge (ESD) protection circuits for self-protecting cascode stages are disclosed. In one example, an ESD protection circuit is described. A cascode stage is configured to selectively couple an output pad to a reference terminal. An ESD sensor may detect a change in voltage indicative of an ESD event occurring at the output pad, causing a gate drive to turn on the cascode stage to conduct ESD current in response to detection of the ESD event at the output pad. A leakage blocker is also included to prevent leakage current from the cascode stage to the gate drive while there is not an ESD event. | 02-12-2009 |
Gregory George Romas, Jr., Coppell, TX US
Patent application number | Description | Published |
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20140152373 | POWER MODULE HAVING STACKED SUBSTRATES ARRANGED TO PROVIDE TIGHTLY-COUPLED SOURCE AND RETURN CURRENT PATHS - Power modules with reduced parasitic inductances are provided. A power module includes a first substrate including a first electrically-conductive layer and a second substrate including a second electrically-conductive layer. These substrates may be stacked on each other. A scalable network of power switches may be arranged on the substrates. Power bars may be connectable to the electrically-conductive layers through electromechanical interfaces at selectable interface locations. The locations and/or type of interface may be selectable based on the arrangement of the switches. The first and second electrically-conductive layers may be disposed on mutually opposed surfaces of a dielectric layer having a thickness chosen to effect a level of coupling between respective source and return current paths provided by the electrically-conductive layers. The level of coupling may be arranged to increase the mutual inductance within the power module, which can effectively reduce the formation of parasitic inductance in the power module. | 06-05-2014 |