# US 4,398,727 A · Pressure balancing stuffing gland for shafts

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- Number: US 4,398,727 A
- Document ID: US4398727A
- Status: Granted
- Kind: A
- Application number: 06/429,051
- Filed: 1982-09-30
- Granted: 1983-08-16
- Earliest claimed: 1982-09-30
- Inventors: Nicholas M. Rylander
- Web page: https://patentgrep.com/patent/US4398727A

## CPC

- F16J 15/54: Other sealings for rotating shafts
- F16C 39/04: using hydraulic or pneumatic means
- F16K 1/2268: {Sealing means for the axis of rotation}
- F16K 41/00: Spindle sealings
- Y10S 277/926: Seal including fluid pressure equalizing or balancing feature
- F16J: PISTONS {(specially adapted for dampers F16F9/32)}; CYLINDERS; SEALINGS
- F16C: SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16K: VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING {(devices for emptying and evacuating the excess liquid in valves or conduits F16L55/07)}
- Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

## Abstract

A stuffing gland for shafts subject to relatively high pressures acting thereon in one longitudinal direction and comprising a flange disposed around the outer periphery of the shaft and having one side thereof open to the high pressure acting on the shaft, the flange being connected with the shaft for transmitting the force created by the pressure acting thereon to the shaft ina longitudinal direction opposed to the action of the high pressure surrounding the shaft, the area of the flange open to the high pressure being equal to the cross sectional area of the shaft for balancing the forces acting of the shaft for ease of operation of the shaft.

## Claims

### Claim 1

A stuffing gland for a shaft subjected to relatively high pressures and comprising first plate means secured around the outer periphery of the shaft and having a central bore provided therein surrounding the shaft, outwardly extending circumferential flange means provided around the outer periphery of the shaft and disposed in the central bore, second plate means secured adjacent the outer surface of the first plate means for retaining the flange means in said central bore, pressure chamber means provided between the second plate means and one side of said flange means, means provided for relieving pressure at the opposite side of said flange means, passageway means extending through the first plate means for communication said relatively high pressures to the pressure chamber means, and the area of the flange means exposed to the pressure in the pressure chamber means being equal to the cross sectional area of the shaft for balancing the forces acting on the shaft.

### Claim 2 (depends on 1)

A stuffing gland as set forth in claim 1 wherein the flange means comprises a flanged collar member disposed around the outer periphery of the shaft and in the central bore, the flanged collar member having a head member with one side thereof open to the pressure chamber, the area of the head member open to the pressure chamber being equal to the cross sectional area of the shaft for providing the balancing of the forces acting on the shaft.

### Claim 3 (depends on 1)

A stuffing gland as set forth in claim 1 wherein the flange means comprises an outwardly extending annular shoulder provided around the outer periphery of the collar, one side of the shoulder being open to the pressure chamber, the area of said one side of the shoulder being equal to the cross sectional area of the shaft for providing the balancing of the forces acting on the shaft.

### Claim 4 (depends on 1)

A stuffing gland as set forth in claim 1 and including means for supplying lubricant to the shaft portion disposed within the flange means for facilitating operation of the shaft.

### Claim 5 (depends on 1)

A stuffing gland as set forth in claim 1 wherein the pressure relieving means includes longitudinally extending passageway means provided on the outer periphery of the shaft, and radially extending bore means provided in the flange means providing communication between the longitudinal passageway means and the said opposite side of the flange means for relieving the pressure to the atmosphere.

### Claim 6 (depends on 1)

A stuffing gland as set forth in claim 1 wherein the pressure relieving means includes radially extending passageway means provided in said first plate means providing communication between the said opposite side of the flange means and the atmosphere for discharging the pressure therethrough.