Fluid pump system

Abstract

A fluid pump system for a fluid delivery system is disclosed. The fluid pump system includes a drive cylinder and a drive piston slidably disposed in the drive cylinder. A drive rod including a crowned end is connected to the drive piston. The fluid system further includes a pump cylinder and a pump piston slidably disposed in the pump cylinder. A pump rod including a crowned end is connected to the pump piston. The drive rod and the pump rod are configured to be detachably coupled to each other, wherein the crowned end of the drive rod cooperates with the crowned end of the pump rod.

What is claimed is: 
     
         1 . A fluid pump system for a fluid delivery system comprising:
 a drive cylinder and a drive piston slidably disposed in the drive cylinder, a drive rod including a crowned end is connected to the drive cylinder;   a pump cylinder and a pump piston slidably disposed in the pump cylinder, the pump rod including a crowned end is connected to the pump cylinder; and   the drive rod and the pump rod configured to be detachably coupled to each other, wherein the crowned end of the drive rod cooperates with the crowned end of the pump rod.   
     
     
         2 . The fluid pump system of  claim 1 , wherein a connector is configured to detachably couple the drive rod and the pump rod. 
     
     
         3 . The fluid pump system of  claim 1 , wherein each of the crowned ends includes a convex outer surface having a predetermined radius. 
     
     
         4 . The fluid pump system of  claim 1 , wherein a distal portion of at least one of the drive rod and the pump rod includes a recess. 
     
     
         5 . The fluid pump system of  claim 4 , wherein the recess provided on the distal portion of at least one of the drive rod and the pump rod is configured to cooperate with a tongue of the connector. 
     
     
         6 . The fluid pump system of  claim 1 , wherein a sleeve is configured to attach the drive cylinder with the pump cylinder, the sleeve including a guide disposed about the drive cylinder and the pump cylinder. 
     
     
         7 . The fluid pump system of  claim 6 , wherein the sleeve includes a flange configured to be fastened to an end cap of at least one of the drive cylinder and the pump cylinder. 
     
     
         8 . The fluid pump system of  claim 6 , wherein the sleeve defines the guide configured to provide a path for translational motion of the connector. 
     
     
         9 . A fluid delivery system comprising:
 a tank for storing a fluid;   a fluid pump system configured to pressurize the fluid received from the tank, the fluid pump system comprising:   a drive cylinder and a drive piston slidably disposed in the drive cylinder, a drive rod including a crowned end is connected to the drive cylinder;   a pump cylinder and a pump piston slidably disposed in the pump cylinder, the pump rod including a crowned end is connected to the pump cylinder; and   the drive rod and the pump rod configured to be detachably coupled to each other, wherein the crowned end of the drive rod cooperates with the crowned end of the pump rod.   
     
     
         10 . The fluid delivery system of  claim 9 , wherein a connector is configured to detachably couple the drive rod and the pump rod. 
     
     
         11 . The fluid delivery system of  claim 9 , wherein each of the crowned ends includes a convex outer surface having a predetermined radius. 
     
     
         12 . The fluid delivery system of  claim 9 , wherein a distal portion of at least one of the drive rod and the pump rod includes a recess. 
     
     
         13 . The fluid delivery system of  claim 12 , wherein the recess provided on the distal portion of at least one of the drive rod and the pump rod is configured to cooperate with a tongue of the connector. 
     
     
         14 . The fluid delivery system of  claim 9 , wherein a sleeve is configured to attach the drive cylinder and the pump cylinder, the sleeve including a guide disposed about the drive cylinder and the pump cylinder. 
     
     
         15 . The fluid delivery system of  claim 14 , wherein the sleeve is configured to be fastened to an end cap of at least one of the drive cylinder and the pump cylinder. 
     
     
         16 . The fluid delivery system of  claim 14 , wherein the sleeve defines the guide configured to provide a path for translational motion of the connector. 
     
     
         17 . A load transfer arrangement for a fluid pump system comprising:
 a drive rod having a crowned end;   a pump rod having a crowned end; and   a connector configured to detachably couple the drive rod and the pump rod, wherein the crowned end of the drive rod is adjacent to the crowned end of the pump rod.   
     
     
         18 . The load transfer arrangement of  claim 17 , wherein each of the crowned ends includes a convex outer surface having a predetermined radius. 
     
     
         19 . The load transfer arrangement of  claim 17 , wherein a distal portion of at least one of the drive rod and the pump rod includes a recess. 
     
     
         20 . The load transfer arrangement of  claim 19 , wherein the recess provided on the distal portion of at least one of the drive rod and the pump rod is configured to cooperate with a tongue of the connector.