Puller for pulley of supercharger

Abstract

A puller for removing a pulley off of the shaft is disclosed. The puller may have proximal and distal plates that are disposable around the pulley so that the pulley is disposed entirely between the proximal and distal plates. These plates are held together by frame members. A push rod is threadably engaged to a proximal plate and operative to be further inserted into the proximal plate so that a distal end of the push rod may push against the shaft and transfer a removing force through the puller to the backside of the pulley for removing the pulley off of the shaft.

1 .- 12 . (canceled) 
     
     
         13 . A pulley mountable to a shaft attached to a machine, the pulley comprising:
 a shaft mount having a central hole for mounting the shaft mount to the shaft, the shaft mount having a plurality of threaded holes;   an in-use body for use during normal operation of the machine, the in-use body having:
 a proximal end with a plurality of through-holes aligned to the plurality of threaded holes of the shaft mount; 
 a cylindrical wall sized to fit over the shaft mount, the cylindrical wall having an external friction surface, the cylindrical body defining a distal end; 
   a sacrificial body for use during removal of the pulley from the shaft, the sacrificial body having:
 a proximal end with a plurality of holes aligned to the plurality of threaded holes in the shaft mount; 
 a cylindrical wall sized to fit over the shaft mount with a distal end of the cylindrical wall of the sacrificial body having a wider distal end compared to the distal end of the cylindrical wall of the in-use body. 
   
     
     
         14 . The sacrificial body of  claim 13  wherein the sacrificial body is attached to the shaft mount when removing the shaft mount from the shaft and the in use body is attached to the shaft mount during normal operation of the machine. 
     
     
         15 . A puller for removing a pulley mounted to a shall, the puller comprising:
 a distal plate having an opening sufficiently large to receive the shaft, the opening being smaller than a distal end of the pulley, the distal plate having a plurality of attachment points disposable about a central axis of the puller;   a proximal plate having a plurality of attachment points disposable about the central axis of the puller, the attachment points of the proximal plate being in alignment with the attachment points of the distal plate, the proximal plate having a hole axially aligned to the central axis of the puller;   a plurality of fame members defining distal and proximal end portions, the distal end portions of the plurality of frame members attached to the plurality of attachment points of the distal plate, the proximal end portions of the plurality of frame members attached to the plurality of attachment points of the proximal plate;   a push rod engaged to the hole of the proximal plate so that the push rod can be advanced into the hole and a distal portion sized and configured to engage a proximal end of the shaft;   wherein as the push rod is advanced into the hole, the distal portion of the push rod pushes against the proximal end of the shaft and creates an opposing force on the distal plate so that the distal plate pulls the pulley off of the shaft.   
     
     
         16 . A puller for removing a pulley mounted to a shaft, the puller comprising:
 a distal plate having an opening sufficiently large to receive the shaft, the opening being smaller than a distal end of the pulley, the distal plate having a plurality of attachment points disposable about a central axis of the puller;   a proximal plate having a plurality of attachment points disposable about the central axis of the puller, the attachment points of the proximal plate being in alignment with the attachment points of the distal plate, the proximal plate having a hole axially aligned to the central axis of the puller;   a plurality of frame members defining distal and proximal end portions, the distal end portions of the plurality of frame members attached to the plurality of attachment points of the distal plate, the proximal end portions of the plurality of frame members attached to the plurality of attachment points of the proximal plate;   a push rod engaged to the hole of the proximal plate so that the push rod can be advanced into the hole and a distal portion sized and configured to engage a proximal end of the shaft;   wherein as the push rod is advanced into the hole, the distal portion of the push rod pushes against the proximal end of the shaft and creates an opposing force on the distal plate so that the distal plate pulls the pulley off of the shaft   wherein the distal portion of the push rod is independently rotatable with a proximal portion of the push rod.   
     
     
         17 . The puller of  claim 16  wherein the distal and proximal plates each have three attachment points spaced apart 120 degrees about the central axis. 
     
     
         18 . The puller of  claim 16  wherein the frame members are bolts, the attachment points of the distal plate are threaded holes engaging a threaded portion of the bolts and the attachment points of the proximal plate are through holes engaging a neck portion of the bolts. 
     
     
         19 . The puller of  claim 16  wherein one of the frame members closest to the opening of the distal plate is removably attachable to the distal plate. 
     
     
         20 . The puller of  claim 16  wherein the push rod has a threaded portion, the distal portion and a ball bearing, the ball bearing being disposed between the threaded portion and the distal portion and providing the primary axial force transfer between the threaded portion and the distal portion. 
     
     
         21 . The puller of  claim 16  further comprising at least one mount formed on a proximal side of the proximal plate, the mount being sized and configured to receive a breaker bar. 
     
     
         22 . A method of removing a pulley mounted on a shaft, the method comprising the steps of:
 inserting the pulley between proximal and distal plates of a puller;   inserting the shaft into an opening of a distal plate of the puller;   advancing a push rod attached to a proximal plate of the puller into the proximal plate;   engaging a distal portion of the push rod with a proximal end of the shaft;   pushing the pulley off of the shaft with the distal plate.   
     
     
         23 . The method of  claim 22  wherein the pushing step includes the step of applying a force to a distal end of a body of the pulley to remove the pulley off of the shaft. 
     
     
         24 . The method of  claim 22  further comprising the steps of:
 removing an elongate frame member from the distal plate of the puller; and 
 attaching the removed frame member onto the distal plate of the puller. 
 
     
     
         25 . The method of  claim 22  further comprising the step of:
 maintaining a distal portion of the push rod in a stationary position when the distal portion of the push rod is in contact with the shaft and the push rod is being advanced into the proximal plate. 
 
     
     
         26 . The method of  claim 22  wherein the advancing step comprises the step of rotating the push rod.