Stuffing box construction

Claim 1

A STUFFING BOX CONSTRUCTION FOR A BONNET OR THE LIKE COMPRISING A SHAFT AND A BONNET, SAID BONNET HAVING AN UPPER RELIVED PORTION CONSISTING OF AN ANNULAR CHAMBER FOR THE SHAFT AROUND A LONGITUDINAL PORTION THEREOF, UPPER AND LOWER SNAP-RINGS SUBSTANTIALLY DEFINING THE RESPECTIVE END LIMITS OF THE SAID CHAMBER, THE SAID SNAPRINGS FITTING WITHIN ANNULAR GROOVES OF THE CHAMBER AND BEING AXIALLY IMMOVABLE RELATIVE TO SAID CHAMBER, PLASTIC PACKING FITTING AT LEAST AN INTERMEDIATE PORTION OF THE SAID CHAMBER BETWEEN SAID END LIMITS, A PLURALITY OF V-RINGS COOPERATING WITH THE UPPER ONE OF SAID SNAP-RINGS TO DEFINE THE SAID UPPER LIMIT OF THE CHAMBER, THE REMAINDER OF SAID V-RINGS BEING DISPOSED AT SUBSTANTIALLY AN OPPOSITE AND LOWER END OF THE CHAMBER, THE LATTER VRINGS BEING MOUNTED IN THE LOWER PORTION OF THE CHAMBER BELOW SAID LOWER SNAP-RING, PRESSURE FEED MEANS FOR SUPPLYING SAID PLASTIC PACKING TO THE INTERMEDIATE PORTION OF SAID ANNULAR CHAMBER, AN END DISPOSED BACK-UP RING AND A FILLER RING WITHIN THE CHAMBER BELOW THE SAID LOWER SNAP RING COOPERATING WITH THE SAID V-RINGS AT SAID LOWER END OF THE CHAMBER WHEREBY UPON THE APPLICATION OF FLUID PRESSURE BY THE PLASTIC PACKING FEED MEANS TO THE INTERMEDIATE PORTION OF THE SAID CHAMBER THE SAID V-RINGS ARE ACTED UPON AND MOVED SLIGHTLY AXIALLY IN OPPOSITE DIRECTIONS.