Patent 8690727 was granted and assigned to Orbital Traction, Ltd on April, 2014 by the United States Patent and Trademark Office.
A method of controlling a pump (43), including operating an engine (23) having an engine intake (49) coupled to a pump output (51) of a pump, and a transmission (41) coupled to the engine and to the pump, and operating a valve (58) between a pump input of the pump and the engine intake, such that the valve can be opened during a ratio change of the transmission.