Valve seat puller
View Patent ↗The present invention provides an apparatus, system and method for replacing seats utilizing J-shaped hooks on a puller shaft that may be compressed to pass through the seat and expand back to engage the seat from below for pulling upward and removal.
1. A valve seat puller for removing a valve seat from a pump wherein said valve seat has an outer diameter, a bottom face, an inner diameter, an aperture defined by said inner diameter, and a top face, said valve seat puller comprising:
a puller shaft tube having a top with an aperture, a bottom, and a length defined between said top and said bottom;
a bottom nose axially aligned with said puller shaft tube and attached to said bottom of said puller shaft tube, having a recessed lip portion comprising a flat surface perpendicular to said length of said puller shaft tube and having an outer diameter, a vertical surface parallel to said length of said puller shaft tube and having a smaller outer diameter than said outer diameter of said flat surface, adapted to trap J-shaped hooks against said vertical surface of said lip portion and on said flat surface of said recessed lip portion while said J-shaped hooks engage said bottom face of said valve seat;
a catch axially positioned on said length of said puller shaft tube length comprising:
a hollow cylinder having a top, a bottom, a wall with a length, a plurality of slits on said length of said wall starting below said top thereby forming a plurality of segments protruding down from said top wherein said plurality of segments each have a distal end forming a bottom of said catch and wherein each said distal end is said J-shaped hook and wherein said plurality of segments are adapted to pivot outward when contacting said bottom nose of said valve seat, pass through said inner diameter of said valve seat and said J-shaped hooks can engage said bottom face of said valve seat for lifting said valve seat from said pump;
a sleeve axially positioned on said length of said puller shaft tube said length and adapted to hold a top of said catch wherein said sleeve is adapted to slide up and down said length of said puller shaft tube;
a flexible O-ring adapted to hold said plurality of segments inward against said shaft and allow said plurality of segments to spread outward when said plurality of segments engage said bottom nose;
a connector rod having a top, a length, a bottom wherein said connector rod is disposed length wise inside said puller shaft tube and said top sticks out said aperture of said top of said puller shaft tube for pulling and pushing said connector rod upward through said length of said puller shaft tube and wherein said bottom of said connector rod is attached to said sleeve and said hollow cylinder; and
a spring biased pull knob attached to said top of said connector rod and adapted to communicate with said top of said of said puller shaft tube for said pushing and said pulling of said connector rod.