Pump with ring retained floating wrist pins and connecting rods

摘要: Improved multi-cylinder pumps wherein a plurality of co-planar positioned connecting rods are radially disposed about crankshaft and generally cylindrical spool-like wrist pins rotatively coupled to the rods. The improvement comprises an assembly have opposed end regions bordering smaller diameter central region that contains one or more ring receiving grooves which mountable in overlapping relation retainer containing formed Upon mounting rings rod inserting locking rods, integrally locked together extending relation.