Packing carrier

Claim 2

A packing sleeve for a rotary seal comprising a pre-formed cylindrical bush of soft compression packing formed of deformable fibrous material and a substantially cylindrical wire gauze enclosing said bush, said bush comprising two pre-formed, semicylindrical components which abut each other at separate edges defining two longitudinally extending seams.

Claim 3

A rotary shaft seal comprising a packing sleeve according to claim 1 and a packing carrier for supporting said packing sleeve in sealing engagement with a shaft mounted within the packing carrier for rotary movement relative to the packing carrier, said packing carrier comprising a tubular part which is tapered to facilitate insertion and removal of the packing sleeve, an outwardly directed mounting flange formed integral with said tubular part at said one end of the tubular part, means formed integral with said tubular part providing an inwardly directed axial abutment for the packing sleeve at the opposite end of the tubular part, a packing cover providing an outer abutment for the packing sleeve and securing the outwardly directed mounting flange to an apertured member formed with an aperture through which the shaft projects and resilient sealing means disposed between the packing cover and the outwardly directed mounting flange of the packing caRrier and between the outwardly directed mounting flange and the apertured member, the packing cover being formed with fluid ducting and provided with a grease nipple communicatively connected to the ducting for loading the packing sleeve so as to provide a seal between the packing sleeve and the shaft.

Claim 4

A rotary shaft seal comprising a packing sleeve according to claim 1, and a packing carrier for supporting said packing sleeve in sealing engagement with a shaft mounted within the carrier for rotary movement relative to the carrier, the carrier comprising a tubular part, an outwardly directed mounting flange formed integral with said tubular part at one end of the tubular part, and means formed integral with said tubular part providing an inwardly directed axial abutment for the packing sleeve at the opposite end of the tubular part.

Claim 5

A rotary shaft seal according to claim 3, in which the packing carrier includes clamping means for securing the outwardly directed mounting flange to the open end of an apertured member forming an aperture through which the shaft projects.

Claim 6

A rotary shaft seal according to claim 4, including resilient sealing means for engagement between the clamping means and the outwardly directed mounting flange and between the outwardly directed mounting flange and the apertured member.

Claim 7

A rotary shaft seal according to claim 4, in which the clamping means are co-operable with securing means for securing a packing cover, providing an outer abutment for the compression packing, to the apertured member.

Claim 8

A rotary shaft seal according to claim 4 in which the clamping means comprises a dished clamping ring with an outer rim engageable with the apertured member and an inner rim for securing the outwardly directed mounting flange of the packing carrier.

Claim 9

A rotary shaft seal according to claim 4, in which the clamping means of the packing carrier comprises a packing cover which is co-operable with securing means for connecting the packing cover to said apertured member.

Claim 10

A rotary shaft seal according to claim 3, in which the packing gland is provided with a flange and the outwardly directed mounting flange of the packing carrier is provided with a deformable, frusto-conical rim disposed between the apertured member and the flange provided on the gland.

Claim 11

A rotary shaft seal according to claim 3, in which fluid ducting is provided in the packing cover for loading the bush of compression packing so as to provide a seal between the compression packing and the shaft.

Claim 12

A rotary shaft seal according to claim 3, in which the tubular part tapers towards said one end to facilitate the insertion and removal of the packing sleeve.

Claim 13

A rotary shaft seal according to claim 7, in which the packing cover comprises a packing gland which has a sleeve portion which is co-operable with the tubular part of the packing carrier.

Claim 14

A stuffing box for sealing a rotary shaft, said stuffing box comprising a housing sleeve, a packing sleeve comprising a preformed cylindrical bush of soft compression packing formed of deformable fibrous material, a substantially cylindrical wire gauze enclosing said bush, said bush comprising two preformed, semicylindrical components which abut each other at separate edges defining two longitudinally extending seams, a packing carrier supporting said packing sleeve in sealing engagement with a shaft mounted within the carrier for rotary movement relative to the carrier, the carrier comprising a tubular part, an outwardly directed mounting flange formed integral with said tubular part at one end of the tubular part, and means formed integral with said tubular part providing an inwardly directed axial abutment for the packing sleeve at the opposite end of the tubular part, said carrier being disposed within the housing sleeve to seal the rotary shaft for rotation about an axis extending substantially parallel to the axis of the housing sleeve, a packing cover attached to one end of the housing sleeve to Form an outer abutment for the compression packing, and fluid ducting formed in the stuffing box for loading the packing with a fluid loading medium so as to provide a seal between the compression packing and the rotary shaft.

Claim 15

A stuffing box for sealing a rotary shaft, said stuffing box comprising a housing sleeve, a packing sleeve comprising a preformed cylindrical bush of soft compression packing formed of deformable fibrous material, a substantially cylindrical wire gauze enclosing said bush, said bush comprising two preformed, semicylindrical components which abut each other at separate edges defining two longitudinally extending seams, a packing carrier supporting said packing sleeve in sealing engagement with a shaft mounted within the carrier for rotary movement relative to the carrier, the carrier comprising a tubular part, an outwardly directed mounting flange formed integral with said tubular part at one end of the tubular part, and means formed integral with said tubular part providing an inwardly directed axial abutment for the packing sleeve at the opposite end of the tubular part, said carrier being disposed within the housing sleeve to seal the rotary shaft for rotation about an axis extending substantially parallel to the axis of the housing sleeve, a packing cover attached to one end of the housing sleeve to Form an outer abutment for the compression packing, and fluid ducting formed in the stuffing box for loading the packing with a fluid loading medium so as to provide a seal between the compression packing and the rotary shaft.

Claim 16

A stuffing box according to claim 11, in which the ducting includes a duct formed in the tubular part of the packing carrier.

Claim 17

A stuffing box according to claim 13, in which the ducting includes a duct formed in a ring which is mounted between the open end of the housing sleeve and the cover member.

Claim 18

A stuffing box according to claim 15, in which the ring is of split construction.

Claim 19

A stuffing box according to claim 13, in which the ducting includes a duct formed in the packing cover.

Claim 20

A stuffing box according to claim 13, in which the packing cover is provided with a frusto-conical internal surface which is engageable with the outer end of the compression packing so as to provide a wedging effect.

Claim 21

A stuffing box according to claim 13, in which the packing cover is provided with an annular section projection having an inner surface engageable with the outer surface of the packing material.

Claim 22

A stuffing box according to claim 17, in which the packing cover is provided with a diaphragm extending between the packing material and the outlet of the duct formed in the packing cover.

Claim 23

A stuffing box according to claim 20, in which the diaphragm is in the form of a hollow cylinder.

Claim 24

A stuffing box according to claim 20, in which the diaphragm is in the form of an annulus connected to the packing cover at its radially outer edge.

Claim 25

A stuffing box according to claim 13, in which a grease nipple is provided at the outer end of the fluid ducting.

Claim 26

A stuffing box according to claim 13, in which the fluid ducting is connected to a source of fluid pressure.

Claim 27

A stuffing box according to claim 24, in which the source of fluid pressure includes a differential piston which is arranged to be subjected, on one side, to pressurised fluid which is sealed by the stuffing box.

Claim 28

A stuffing box according to Claim 13, including a pressure relief valve for the loading fluid.

Claim 29

A stuffing box according to claim 13, including a pressure indicator for indicating the pressure of the loading fluid.

Claim 30

A stuffing box according to claim 13, in which said tubular part of said packing carrier is tapered to facilitate insertion and removal of the packing sleeve.

Claim 31

A stuffing box according to claim 13, in which the rotary shaft seal includes clamping means for securing the outwardly directed mounting flange of the packing carrier to the open end of the housing sleeve.

Claim 32

A stuffing box according to claim 29, including resilient sealing means for engagement between the clamping means and the outwardly directed mounting flange and between the outwardly directed mounting flange and the open end of the housing sleeve.

Claim 33

A stuffing box according to claim 29, in which the clamping means are co-operable with securing means for securing the packing cover to the open end of the housing sleeve.

Claim 34

A stuffing box according to claim 13, including a dished clamping ring for securing the outwardly directed mounting flange of the packing carrier to the open end of the housing sleeve, the dished clamping ring having an outer rim engageable with the end of the housing sleeve and an inner rim for securing the outwardly directed mounting flange of the packing carrier.

Claim 35

A stuffing box according to claim 13, in which the packing cover serves as clamping means for securing the outwardly directed mounting flange of the packing carrier to the open end of the housing sleeve.

Claim 36

A stuffing box according to claim 13, in which the packing cover constitutes a packing gland and has a sleeve portion which is co-operable with the tubular part of the packing carrier.

Claim 37

A stuffing box according to claim 34, in which the packing gland is provided with a flange and the outwardly directed mounting flange of the packing carrier is provided with a deformable, frusto-conical rim for engagement between the end of the housing sleeve accommodating the shaft and the flange provided on the gland.

Claim 38

A stuffing box for sealing a rotary shaft, said stuffing box comprising a housing sleeve, a rotary shaft seal disposed within the housing sleeve to seal the shaft for rotation about an axis extending substantially parallel to the axis of the housing sleeve, a packing cover attached to the housing sleeve to form an outer abutment for a packing sleeve forming part of the rotary shaft seal and formed with fluid ducting, resilient sealing means disposed between the packing cover and an outwardly directed mounting flange forming part of the rotary shaft seal and between said outwardly directed mounting flange and the housing sleeve and a grease nipple communicatively connected to the ducting for loading the packing sleeve with grease so as to provide a seal between the packing sleeve and the shaft, the rotary shaft seal comprising the packing sleeve and a packing carrier for supporting the packing sleeve in sealing engagement with the shaft and comprising a tubular part which is tapered to facilitate insertion and removal of the packing sleeve, said outwardly directed mounting flange formed integral with the tubular part at said one end of the tubular part and means formed integral with the tubular part providing an inwardly directed axial abutment for the packing sleeve at the opposite end of the tubular part, the packing sleeve comprising a substantially cylindrical bush of soft compression packing formed of deformable fibrous material, a substantially cylindrical wire gauze enclosing said bush, said bush comprising two preformed, semi-cylindrical components which abut each other at separable edges defining two longitudinally extending seams.

Claim 39

A stuffing box for sealing a rotary shaft, said stuffing box comprising a housing sleeve, a rotary shaft seal disposed within the housing sleeve to seal the shaft for rotation about an axis extending substantially parallel to the axis of the housing sleeve, a packing cover attached to the housing sleeve to form an outer abutment for a packing sleeve forming part of the rotary shaft seal and formed with fluid ducting, resilient sealing means disposed between the packing cover and an outwardly directed mounting flange forming part of the rotary shaft seal and between said outwardly directed mounting flange and the housing sleeve and a grease nipple communicatively connected to the ducting for loading the packing sleeve with grease so as to provide a seal between the packing sleeve and the shaft, the rotary shaft seal comprising the packing sleeve and a packing carrier for supporting the packing sleeve in sealing engagement with the shaft and comprising a tubular part which is tapered to facilitate insertion and removal of the packing sleeve, said outwardly directed mounting flange formed integral with the tubular part at said one end of the tubular part and means formed integral with the tubular part providing an inwardly directed axial abutment for the packing sleeve at the opposite end of the tubular part, the packing sleeve comprising a substantially cylindrical bush of soft compression packing formed of deformable fibrous material, a substantially cylindrical wire gauze enclosing said bush, said bush comprising two preformed, semi-cylindrical components which abut each other at separable edges defining two longitudinally extending seams.