Patent ID: 7950322

Claim:
A plunger assembly, comprising: a pony rod adapter including: a first cylindrical body having opposite ends and a plurality of apertures penetrating said first cylindrical body between said opposite ends for receiving a lever; a first helically threaded pin being affixed to said first cylindrical body and projecting from one of said opposite ends; and, a second helically threaded pin being affixed to said first cylindrical body and projecting from the other one of said opposite ends; a plunger being releasably attached to said pony rod adapter, said plunger including: a second cylindrical body for reciprocating within a pumping chamber, said second cylindrical body having a first outer end with a first helically threaded bore for threadably receiving said first helically threaded pin, and said second cylindrical body also having a first inner end remote from said first outer end with a polygonal socket for receiving a plunger key; and, a pony rod being releasably attached to said pony rod adapter, said pony rod including: a third cylindrical body for reciprocating into, and out of, the power end of a pump, said third cylindrical body having a second inner end with a second helically threaded bore for threadably receiving said second helically threaded pin, and said third cylindrical body also having a second outer end; and, a peripheral flange being affixed to, and extending outwardly from, said second outer end, said peripheral flange being provided with a plurality of holes through which a plurality threaded fasteners are extended for connecting said pony rod to the power end of a pump.