US 12,077,426 B1
Liquid discharge system including liquid product pump having vibration sensor
Peter Charles Goodier, White, GA (US); and Shawn R. Moore, Taylorsville, GA (US)
Assigned to PARAGON TANK TRUCK EQUIPMENT, LLC, Cartersville, GA (US)
Filed by PARAGON TANK TRUCK EQUIPMENT, LLC, Cartersville, GA (US)
Filed on Jun. 9, 2023, as Appl. No. 18/207,865.
Application 18/207,865 is a continuation of application No. 16/928,676, filed on Jul. 14, 2020, granted, now 11,713,237.
This patent is subject to a terminal disclaimer.
Int. Cl. B67D 7/32 (2010.01); B67D 7/62 (2010.01); F04C 14/28 (2006.01)
CPC B67D 7/3272 (2013.01) [B67D 7/62 (2013.01); F04C 14/28 (2013.01); F04C 2270/12 (2013.01); F04C 2270/86 (2013.01)] 28 Claims
OG exemplary drawing
 
1. A liquid discharge system for a tank truck, comprising:
a hydraulic pump operably coupled to a power take-off (PTO) from the tank truck;
an enclosure containing a liquid product pump and a first hydraulic motor operably coupled to the hydraulic pump for providing mechanical power to the liquid product pump, the enclosure further containing an air compressor and a second hydraulic motor operably coupled to the hydraulic pump for driving the air compressor;
a selection valve in fluid communication with the hydraulic pump, the selection valve operably coupled to the liquid product pump and the air compressor, the selection valve operable to select one of the liquid product pump and the air compressor for discharging a liquid product from a tank trailer of the tank truck;
a vibration sensor operably coupled to the liquid product pump for monitoring vibration within the liquid product pump and producing a vibration signal corresponding to a level of cavitation within the liquid product pump;
a speed control module that actuates the first hydraulic motor to adjust an operating speed of the liquid product pump in response to the vibration signal corresponding to the level of cavitation within the liquid product pump; and
a pressure sensor for measuring a flow rate and for producing a pressure signal corresponding to the flow rate through the liquid product pump;
wherein the pressure signal produced by the pressure sensor operates to override the vibration signal produced by the vibration sensor and cause the speed control module to ignore the vibration signal produced by the vibration sensor that actuates the first hydraulic motor to adjust the operating speed of the liquid product pump.