Patent attributes
A bonnet and stuffing box assembly includes a bonnet defining a bonnet bore; a stuffing box connected to the bonnet, the stuffing box defining a stuffing box bore, the stuffing box bore and bonnet bore defining an assembly bore; a bushing assembly received in the assembly bore and comprising a stuffing box bushing and a bonnet bushing, the stuffing box bushing defining a narrow portion disposed in the stuffing box bore and a wide portion at least partially disposed in the bonnet bore, the bonnet bushing disposed in the bonnet bore and confronting the wide portion of the stuffing box bushing, the bushing assembly defining a bushing bore extending through the stuffing box bushing and the bonnet bushing; and a stem extending through the bushing bore.
