Pump Drive System

Abstract

A system is provided for a product pump drive for pumping fluids or substances into or out of a tanker-trailer towed by a tractor, the system including an auxiliary diesel engine mounted on the tractor, the engine operating a hydraulic pump used to operate a hydraulic motor operatively coupled to a product pump. The system can further include a high-pressure shutdown mechanism to shut down the engine if the pressure of the hydraulic fluid pumped by the hydraulic pump exceeds a high-pressure threshold. The system can also include an air conditioning unit and/or an electrical generator operatively coupled to the auxiliary diesel engine.

1 . A system, comprising:
 a) a diesel engine;   b) a hydraulic pump operatively coupled to the engine;   c) a hydraulic motor;   d) a product pump operatively coupled to the hydraulic motor; and   e) a selector valve operatively coupling the hydraulic pump to the hydraulic motor whereby hydraulic fluid pumped by the hydraulic pump when the engine is running can operate the hydraulic motor to, in turn, operate the product pump to pump the fluids or substances.   
     
     
         2 . The system as set forth in  claim 1 , further comprising an air conditioning unit operatively coupled to the engine. 
     
     
         3 . The system as set forth in  claim 1 , further comprising an electrical generator operatively coupled to the engine.