Box lubrication pump

Abstract

A box lubricator that includes a pump with a piston housing and piston. The piston housing extends from a first end to a second end, and includes a bore extending through the piston housing from the first end of the piston housing to the second end of the piston housing. The piston housing also includes a recess disposed at the second end of the piston housing, the recess being concentric with the bore and comprising a diameter larger than a diameter of the bore. The piston is disposed inside the bore of the piston housing. At least one elastomeric seal is disposed inside the recess of the piston housing and around the piston. In some embodiments, a ball and socket joint connects the piston to the rocker arm assembly. In some embodiments, a fluid passage and a check valve are disposed inside the piston.

1 . A box lubricator comprising:
 a pump comprising;
 a piston housing extending from a first end to a second end, the piston housing comprising,
 a bore extending through the piston housing from the first end of the piston housing to the second end of the piston housing; 
 a recess disposed at the second end of the piston housing concentric with the bore and comprising a diameter larger than a diameter of the bore; 
 
 a piston disposed inside the bore of the piston housing and comprising a first end opposite a second end; and 
 at least one elastomeric seal disposed inside the recess of the piston housing and around the piston; 
   
     
     
         2 . The box lubricator of  claim 1 , further comprising;
 a support post in close proximity to the piston housing and comprising a first end opposite a second end;   a piston housing inlet intersecting the bore between the first end of the piston housing and the recess; and   a piston housing outlet disposed at the first end of the piston housing and in fluid communication with the bore; and   a main body joining the support post and the piston housing, the main body including a fluid pathway fluidly connecting the piston housing inlet with the first end of the support post.   
     
     
         3 . The box lubricator of  claim 2 , wherein the at least one elastomeric seal is a U-cup seal. 
     
     
         4 . The box lubricator of  claim 3 , wherein there are two elastomeric seals disposed inside the recess of the piston housing and around the piston. 
     
     
         5 . The box lubricator of  claim 4 , wherein a snap ring is disposed inside the recess of the piston housing and retains the two elastomeric seals inside the recess of the piston housing. 
     
     
         6 . The box lubricator of  claim 5 , wherein at least two spacers are disposed between the two elastomeric seals and another spacer is disposed between the snap ring and the at least two elastomeric seals. 
     
     
         7 . The box lubricator of  claim 1 , further comprising;
 a fluid reservoir comprising;
 a top plate and an opening formed in the top plate; and 
 wherein the pump is mounted to the top plate of the fluid reservoir such that the first end of the support post and the first end of the piston housing are disposed outside of the fluid reservoir and the second end of the support post and the second end of the piston housing extends into the fluid reservoir through the opening in the top plate of the fluid reservoir. 
   
     
     
         8 . The box lubricator of  claim 7 , further comprising;
 a camshaft extending horizontally into the fluid reservoir and comprising a cam   a rocker arm assembly pivotally connected to the second end of the support post, the rocker arm assembly extending between the cam of the camshaft and the second end of the piston, and connected to the second end of the piston by a ball and socket joint;   a fluid is disposed inside the fluid reservoir and lubricates the pump; and wherein the pump is fluidly connected to a separate reservoir containing a different fluid from the fluid in the fluid reservoir and the pump pumps the different fluid.