Variable displacment fluid pump

Abstract

The present disclosure is directed to a variable displacement fluid pump, comprising: a) one or more cylinder portions comprising an internal cylinder diameter and a first cylinder end and second cylinder end; b) at least one multiport valve; c) one or more packing boxes comprising one or more packing box seals, an internal packing box diameter and a first packing box end and a second packing box end; d) one or more piston portions; e) at least one linear multiport valve actuator capable of rotating the multiport valve to selectively align the one or more inlet ports and/or one or more outlet ports; and f) at least one linear piston actuator comprising a piston actuator plunger capable of being engaged with the piston portion mount and capable of providing a discharge stroke and a suction stroke.

What is claimed is: 
     
         1 . A variable displacement fluid pump, comprising:
 a) one or more cylinder portions comprising an internal cylinder diameter and a first cylinder end and second cylinder end, wherein the internal cylinder diameter forms a fluid reservoir;   b) at least one multiport valve comprising one or more inlet ports and/or one or more outlet ports and a main inlet port that is engaged with the internal cylinder at the second cylinder end, wherein the main inlet port is capable of receiving a fluid from the one or more cylinder portions;   c) one or more packing boxes comprising one or more packing box seals, an internal packing box diameter and a first packing box end and a second packing box end, wherein the packing box is affixed to a first cylinder end, and wherein the internal cylinder diameter and the internal packing box diameter are aligned;   d) one or more piston portions comprising a piston portion mount at a first end and an outer diameter capable of being engaged with the aligned internal cylinder diameter and the internal packing box diameter;   e) at least one linear multiport valve actuator capable of rotating the multiport valve to selectively align the one or more inlet ports and/or one or more outlet ports; and   f) at least one linear piston actuator comprising a piston actuator plunger capable of being engaged with the piston portion mount and capable of providing a discharge stroke and a suction stroke by moving the piston actuator plunger and thereby moving the one or more piston portions within the internal cylinder diameter of the one or more cylinder portions.   
     
     
         2 . The variable displacement fluid pump of  claim 1 , further comprising a base portion, whereby the at least one linear piston actuator is mounted to a first base portion and in linear arrangement with the one or more piston portions that are engaged with the internal cylinder diameter of each respective cylinder portion. 
     
     
         3 . The variable displacement fluid pump of  claim 1 , wherein the multiport valve actuator comprises a rack with a plurality of teeth capable of engaging with a pinion that is rotationally engaged with a selector stem of the multiport valve. 
     
     
         4 . The variable displacement fluid pump of  claim 1 , further comprising that the discharge stroke is provided in incremental amounts of a fluid contained in the one or more cylinder portions. 
     
     
         5 . The variable displacement fluid pump of  claim 1 , wherein the at least one linear multiport valve actuator and the at least one linear piston actuator are in electrical communication with an AC or DC electrical power source. 
     
     
         6 . The variable displacement fluid pump of  claim 1 , wherein the at least one linear multiport valve actuator and the at least one linear piston actuator are in electrical communication with a control module comprising a CPU capable of controlling a full and/or incremental discharge stroke and suction stroke. 
     
     
         7 . The variable displacement fluid pump of  claim 1 , wherein the at least one linear multiport valve actuator rotatably engages the multiport valve to selectively align the one or more inlet ports and the at least one linear piston actuator moves each respective piston actuator plunger in a suction stroke. 
     
     
         8 . The variable displacement fluid pump of  claim 1 , wherein the at least one linear multiport valve actuator rotatably engages the multiport valve to selectively align the one or more outlet ports and the at least one linear piston actuator moves each respective piston actuator plunger in a full or incremental discharge stroke. 
     
     
         9 . The variable displacement fluid pump of  claim 1 , wherein the at least one linear multiport valve actuator rotatably engages the multiport valve to selectively align one inlet port and the at least one linear piston actuator moves each respective piston actuator plunger in a suction stroke. 
     
     
         10 . The variable displacement fluid pump of  claim 1 , wherein the at least one linear multiport valve actuator rotatably engages the multiport valve to selectively align one outlet port and the at least one linear piston actuator moves each respective piston actuator plunger in a full or incremental discharge stroke. 
     
     
         11 . The variable displacement fluid pump of  claim 1 , wherein the discharge stroke and/or the suction stroke have a stroke length between about 200 mm and 1000 mm. 
     
     
         12 . The variable displacement fluid pump of  claim 1 , wherein the discharge stroke and/or the suction stroke have a stroke length of about 500 mm. 
     
     
         13 . The variable displacement fluid pump of  claim 1 , wherein the cylinder portion has a volume of between about 0.05 L and 1 L. 
     
     
         14 . The variable displacement fluid pump of  claim 1 , wherein the one or more cylinder portions, the at least one multiport valve and the one or more piston portions are stainless steel. 
     
     
         15 . The variable displacement fluid pump of  claim 1 , wherein the variable displacement fluid pump comprises:
 i. one cylinder portion;   ii. one multiport valve;   iii. one packing box;   iv. one piston portion;   v. one linear multiport valve actuator; and   vi. one linear piston actuator.   
     
     
         16 . The variable displacement fluid pump of  claim 1 , wherein the variable displacement fluid pump comprises:
 i. two cylinder portion;   ii. one multiport valve;   iii. two packing boxes;   iv. two piston portion;   v. one linear multiport valve actuator; and   vi. one linear piston actuator.