Prior to my invention the stuffing box constructions employed to accomplish this result were complicated and employed a relatively large number of intricate and expensive parts.ĭifficulty has been encountered in the prior devices resulting from a lack of adequate lubrication between the reciprocating rod and the packing material resulting in relatively rapid wear of either the rod or the packing material or both and necessitating frequent repairs. However, in stuffing boxes which are used in connection with oil well pumping systems, the stuffing box must, in addition to providing the required fluid seal, be so arranged as to accommodate a certain amount of axial and angular misalignment between the conduit and the reciprocating rod. The primary function of a stuffing box is to provide a fluid seal between a conduit and a rotary or reciprocating rod which is positioned within the conduit. My invention relates to a stuffing box and has particular reference to an improved stuffing box or packing gland finding particular utility when employed to pack a reciprocating rod such as the polished rod of oil well pumping systems.
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