Apparatus in which an annular ring is carried within a groove about one member for slidably engaging the cylindrical surface of another member

Claim 2

Apparatus comprising first and second members adapted to be telescopically disposed with respect to one another, said first member having a circumferential groove thereabout which is opposite a cylindrical surface of the second member when said members are telescopically disposed, a first ring assembled within the groove and having a recess in its side adjacent at least one annular surface thereof which protrudes from the groove for sliding engagement axially with respect to the cylindrical surface of the second member, and a second ring having a circumferential shape which permits it to be moved axially of the first member and into a position opposite the recess in the first ring, said second ring being of a material which is radially distortible into the recess but relatively non-elastic so that, when so distorted, it will retain said first ring within said groove.

Claim 3

Apparatus of the character defined in claim 1, wherein the recess is intermediate protruding annular surfaces on the side of the first ring.

Claim 4

Apparatus of the character defined in claim 1, wherein the groove is in the outer side of the first member for disposal telescopically within the cylindrical surface on the inner side of the second member, and said retainer ring is movable axially over the end of the first member and then distorted radially inwardly against the recess in the first ring.

Claim 5

A sealed joint, comprising first and second members adapted to be telescopically disposed with respect to one another, said first member having a circumferential groove thereabout which is opposite a cylindrical surface of the second member when said members are telescopically disposed, a circumferentially continuous seal ring of elastic material adapted to be distorted into a shape which permits it to be moved axially of the first member and into the groove therein, said seal ring having a recess in its side adjacent at least one annular lip thereof which protrudes from the groove of the first member for sealing engagement with the cylindrical surface of the second member, and another ring having a circumferential shape which permits it to be moved axially of the first member and into a position opposite the recess in the seal ring, said other ring being of a material which is radially distortible into the recess, but relatively nonelastic so that, when so distorted, it will retain said seal ring on said first member.

Claim 6

A sealed joint, comprising first and second members adapted to be telescopically disposed with respect to one another, said first member having a circumferential groove thereabout which is opposite a cylindrical surface of the second member when said members are telescopically disposed, a circumferentially continuous seal ring of elastic material adapted to be distorted into a shape which permits it to be moved axially of the first member and into the groove therein, said seal ring having a recess in its side adjacent at least one annular lip thereof which protrudes from the groove of the first member for sealing engagement with the cylindrical surface of the second member, and another ring having a circumferential shape which permits it to be moved axially of the first member and into a position opposite the recess in the seal ring, said other ring being of a material which is radially distortible into the recess, but relatively nonelastic so that, when so distorted, it will retain said seal ring on said first member.

Claim 7

A sealed joint of the character defined in claim 4, wherein the recess is intermediate protruding annular lips on the side of the seal ring.

Claim 8

A sealed joint of the character defined in claim 5, wherein the second member has a guide surface at one end of its cylindrical surface, whereby the lips of the seal ring are successively compressed or decompressed as the members are moved relatively into or out of telescoping relation, said cylindrical surface having vent means formed therein for substantially equalizing pressure across each lip prior to compression as the members are moved into telescoping relation and decompression as they are moved out of telescoping relation.

Claim 9

A sealed joint of the character defined in claim 6, wherein the vent means comprises a groove formed in the cylindrical surface of the second member to connect its guide surface with its cylindrical surface a distance from the intersection of said surfaces at least as great as the compressed width of each seal lip.

Claim 10

A joint of the character defined in claim 4, wherein the groove is in the outer side of the first member for disposal telescopically within the cylindrical surface on the inner side of the second member, the seal ring is adapted to be stretched over the end of said first member, and the retainer ring is movable axially over the end of the first member and then distorted radially inwardly against the recess in the seal ring.

Claim 11

A joint of the character defined in claim 4, wherein the groove is of dovetail shape in cross section, and the seal ring is of matching cross-sectional shape for fitting closely therein.

Claim 12

A joint of the character defined in claim 4, including a pair of anti-extrusion rings each of which is circumferentially split to permit it to be disposed between each end of the groove and one end of the seal ring, the ends of the groove being undercut and the ends of the anti-extrusion rings being urged by the seal ring into closely fitting relation within the undercut ends, and the anti-extrusion rings being of a material which is substantially non-elastic but nevertheless sufficiently deformable that their outer surfaces are expanded into positions close to the cylindrical surface of said second member in response to axial expansion of the seal ring.

Claim 13

A joint of the character defined in claim 10, wherein the opposite ends of the anti-extrusion rings are undercut and the adjacent ends of the seal ring fit closely thereagainst.

Claim 14

A joint of the character defined in claim 5, wherein the outer surfaces of the lips taper convergently toward one another.

Claim 15

A joint of the character defined in claim 5, wherein the retainer ring has axially spaced, annular ribs thereabout for pressing tightly against the recess in the seal ring adjacent its corners.

Claim 16

A joint of the character defined in claim 5, wherein the seal ring has a hole therein connecting its inner side adjacent the recess with a space on the inner side of the retainer ring intermediate the ribs, and the retainer ring has a hole therein connecting the space with the outer side of the clamp ring.

Claim 17

A sealed joint, comprising first and second members adapted to be telescopically disposed with respect to one another, seal means of elastic material carried by the first member for disposal opposite a cylindrical surface of the second member when said members are telescopically disposed, said seal means including axially spaced annular sealing portions which protrude for sealing engagement with the cylindrical surface of the second member, the second member having a guide surface at one end of its cylindrical surface, whereby the protruding sealing portions are successively compressed or decompressed as said members are moved relatively into or out of telescoping relation, and vent means formed in the second member for substantially equalizing pressure across each sealing portion prior to compression as the members are moved into telescoping relation and decompression as the members are moved out of telescoping relation.

Claim 18

A sealed joint, comprising first and second members adapted to be telescopically disposed with respect to one another, seal means of elastic material carried by the first member for disposal opposite a cylindrical surface of the second member when said members are telescopically disposed, said seal means including axially spaced annular sealing portions which protrude for sealing engagement with the cylindrical surface of the second member, the second member having a guide surface at one end of its cylindrical surface, whereby the protruding sealing portions are successively compressed or decompressed as said members are moved relatively into or out of telescoping relation, and vent means formed in the second member for substantially equalizing pressure across each sealing portion prior to compression as the members are moved into telescoping relation and decompression as the members are moved out of telescoping relation.

Claim 19

A sealed joint of the character defined in claim 15, wherein the vent means comprises a groove formed in the cylindrical surface of the second member to connect the guide surfaces with the cylindrical surface a distance from the intersection of the guide surface and cylindrical surfaces at least as great as the compressed width of each protruding sealing portion.

Claim 20

A sealed joint of the character defined in claim 15, wherein said seal means comprises a seal ring received within a groove about the first member, and said sealing portions comprise sealing lips of the seal ring.

Claim 21

A sealed joint of the character defined in claim 15, wherein said seal means comprises a plurality of seal rings received within axially spaced-apart grooves about the first member.

Claim 22

A sealed joint of the character defined in claim 15, wherein a second guide surface is formed at the opposite end of the cylindrical surface of the second member, and additional vent means is provided in the second member for substantially equalizing pressure across each sealing portion prior to compression by the second guide surface as the members are moved into and decompression with respect thereto as the members are moved out of the telescoping relation.

Claim 23

A bearing assembly, comprising first and second members adapted to be telescopically disposed with respect to one another, said first member having a circumferential groove thereabout which is opposite a cylindrical surface of the second member when said members are telescopically disposed, a ring of bearing material which is circumferentially split so that it may be moved axially of the first member and into the groove thereabout, said bearing ring having a recess in its side adjacent at least one annular bearing surface which protrudes from the groove for sliding engagement with respect to the cylindrical surface of the second member, and another ring which may be moved axially of the first member and into a position opposite the recess in the bearing ring, said other ring being of a material which is radially distortible into the recess, but relatively non-elastic so that, when so distorted, it will retain said bearing ring within said groove.

Claim 24

A bearing assembly, comprising first and second members adapted to be telescopically disposed with respect to one another, said first member having a circumferential groove thereabout which is opposite a cylindrical surface of the second member when said members are telescopically disposed, a ring of bearing material which is circumferentially split so that it may be moved axially of the first member and into the groove thereabout, said bearing ring having a recess in its side adjacent at least one annular bearing surface which protrudes from the groove for sliding engagement with respect to the cylindrical surface of the second member, and another ring which may be moved axially of the first member and into a position opposite the recess in the bearing ring, said other ring being of a material which is radially distortible into the recess, but relatively non-elastic so that, when so distorted, it will retain said bearing ring within said groove.

Claim 25

An assembly of the character defined in claim 20, wherein the recess is intermediate protruding annular bearing surfaces on the side of the bearing ring.

Claim 26

An assembly of the character defined in claim 20, wherein the groove in the first member is on the outer side thereof for disposal telescopically within the cylindrical surface on the inner side of the second member, said bearing ring is movable axially over the end of the first member, and the retainer ring is movable axially over the end of the first member and then distorted radially inwardly against the recess in the ring.

Claim 27

Apparatus comprising a first member adapted to be telescopically disposed with respect to a second member and having a circumferential groove thereabout which is opposite a cylindrical surface of the second member, when said members are telescopically disposed, a first ring adapted to be assembled within the groove and having a recess in its side adjacent at least one annular surface thereof which protrudes from the groove for sliding engagement with respect to the cylindrical surface of the second member, and a second ring having a circumferential shape which permits it to be moved axially of the first member and into a position opposite the recess in the first ring, said second ring being of a material which is radially distortible into the recess, but relatively non-elastic so that, when so distorted, it will retain said first ring within said groove.

Claim 28

Apparatus comprising a first member adapted to be telescopically disposed with respect to a second member and having a circumferential groove thereabout which is opposite a cylindrical surface of the second member, when said members are telescopically disposed, a first ring adapted to be assembled within the groove and having a recess in its side adjacent at least one annular surface thereof which protrudes from the groove for sliding engagement with respect to the cylindrical surface of the second member, and a second ring having a circumferential shape which permits it to be moved axially of the first member and into a position opposite the recess in the first ring, said second ring being of a material which is radially distortible into the recess, but relatively non-elastic so that, when so distorted, it will retain said first ring within said groove.

Claim 29

Apparatus of the character defined in claim 23, wherein the recess is intermediate protruding annular surfaces on the side of the first ring.

Claim 30

Apparatus of the character defined in claim 23, wherein the groove is in the outer side of the first member for disposal telescopically within the cylindrical surface on the inner side of the second member, and said retainer ring is movable axially over the end of the first member and then distorted radially inwardly against the recess in the first ring.

Claim 31

In a sealed joint, a first member adapted to be telescopically disposed with respect to a second member and having a circumferential groove thereabout which is opposite a cylindrical surface of the second member, when said members are telescopically disposed, a circumferentially continuous seal ring of elastic material adapted to be distorted into a shape which permits it to be moved axially of the first member and into the groove therein, said seal ring having a recess in its side adjacent at least one annular lip thereof which protrudes from the groove of the first member for sealing engagement with the cylindrical surface of the second member, and another ring having a circumferential shape which permits it to be moved axially of the first member and into a position opposite the recess in the seal ring, said other ring being of a material which is radially distortible into the recess, but relatively nonelastic so that, when so distorted, it will retain said seal ring on said first member.

Claim 32

In a sealed joint, a first member adapted to be telescopically disposed with respect to a second member and having a circumferential groove thereabout which is opposite a cylindrical surface of the second member, when said members are telescopically disposed, a circumferentially continuous seal ring of elastic material adapted to be distorted into a shape which permits it to be moved axially of the first member and into the groove therein, said seal ring having a recess in its side adjacent at least one annular lip thereof which protrudes from the groove of the first member for sealing engagement with the cylindrical surface of the second member, and another ring having a circumferential shape which permits it to be moved axially of the first member and into a position opposite the recess in the seal ring, said other ring being of a material which is radially distortible into the recess, but relatively nonelastic so that, when so distorted, it will retain said seal ring on said first member.

Claim 33

A sealed joint of the character defined in claim 26, wherein the recess is intermediate protruding annular lips on the side of the seal ring.

Claim 34

A joint of the character defined in claim 26, wherein the groove is in the outer side of the first member for disposal telescopically within the cylindrical surface on the inner side of the second member, the seal ring is adapted to be stretched over the end of said first member, and the retainer ring is movable axially over the end of the first member and then distorted radially inwardly against the recess in the seal ring.

Claim 35

A joint of the character defined in claim 26, wherein the groove is of dovetail shape in cross section, and the seal ring is of matching cross-sectional shape for fitting closely therein.

Claim 36

A joint of the character defined in claim 26, including a pair of anti-extrusion rings each of which is circumferentially split to permit it to be disposed between each end of the groove and one end of the seal ring, the ends of the groove being undercut and the ends of the anti-extrusion rings being urged by the seal ring into closely fitting relation within the undercut ends, and the anti-extrusion rings being of a material which is substantially non-elastic but nevertheless sufficiently deformable that their outer surfaces are expanded into positions close to the cylindrical surface of said second member in response to axial expansion of the seal ring.

Claim 37

A joint of the character defined in claim 30, wherein the opposite ends of the anti-extrusion rings are undercut and the adjacent ends of the seal ring fit closely thereagainst.

Claim 38

A joint of the character defined in claim 27, wherein the outer surfaces of the lips taper convergently toward one another.

Claim 39

A joint of the character defined in claim 27, wherein the retainer ring has axially spaced, annular ribs thereabout for pressing tightly against the recess in the seal ring adjacent its corners.

Claim 40

A joint of the character defined in claim 27, wherein the seal ring has a hole therein connecting its inner side adjacent the recess with a space on the inner side of the retainer ring intermediate the ribs, and the retainer ring has a hole therein connecting the space with the outer side of the retainer ring.

Claim 41

For use in a sealed joint, of the type in which a first member is adapted to be telescopically disposed with respect to a second member, seal means of elastic material is carried by the first member for disposal opposite a cylindrical surface of the second member, when said members are telescopically disposed, and the seal means includes annular sealing portions which protrude from the groove for sealing engagement with the cylindrical surface of the second member, said second member having a guide surface at one end of its cylindrical surface, whereby the protruding sealing portions are successively compressed or decompressed as said members are moved relatively into telescoping relation, and vent means formed therein for substantially equalizing pressure across each sealing portion prior to compression as the members are moved into telescoping relation and decompression as the members are moved out of telescoping relation.

Claim 42

For use in a sealed joint, of the type in which a first member is adapted to be telescopically disposed with respect to a second member, seal means of elastic material is carried by the first member for disposal opposite a cylindrical surface of the second member, when said members are telescopically disposed, and the seal means includes annular sealing portions which protrude from the groove for sealing engagement with the cylindrical surface of the second member, said second member having a guide surface at one end of its cylindrical surface, whereby the protruding sealing portions are successively compressed or decompressed as said members are moved relatively into telescoping relation, and vent means formed therein for substantially equalizing pressure across each sealing portion prior to compression as the members are moved into telescoping relation and decompression as the members are moved out of telescoping relation.

Claim 43

A second member of a sealed joint of the character defined in claim 35, wherein the vent means comprises a groove formed in the cylindrical surface of the second member to connect the guide surfaces with the cylindrical surface a distance from the intersection of the guide surface and cylindrical surface at least as great as the compressed width of each protruding sealing portion.

Claim 44

A sealed joint of the character defined in claim 35, wherein a second guide surface is formed at the opposite end of the cylindrical surface of the second member, and second vent means is provided in the second member for substantially equalizing pressure across each sealing portion prior to compression by the second guide surface as the members are moved into and decompression with respect thereto as the members are moved out of the telescoping relation.

Claim 45

In a bearing assembly, a first member is adapted to be telescopically disposed with respect to a second member, said first member having a circumferential groove thereabout which is opposite a cylindrical surface of the second member when said members are telescopically disposed, a ring of bearing material which is circumferentially split so that it may be moved axially of the first member and into the groove thereabout, said bearing ring having a recess in its side adjacent at least one annular bearing surface which protrudes from the groove for sliding engagement with respect to the cylindrical surface of the second member, and another ring which is of a circumferential shape which permits it to be moved axially of the first member and into a position opposite the recess in the bearing ring, said other ring being of a material which is radially distortible into the recess, but relatively non-elastic so that, when so distorted, it will retain said bearing ring within said groove.

Claim 46

In a bearing assembly, a first member is adapted to be telescopically disposed with respect to a second member, said first member having a circumferential groove thereabout which is opposite a cylindrical surface of the second member when said members are telescopically disposed, a ring of bearing material which is circumferentially split so that it may be moved axially of the first member and into the groove thereabout, said bearing ring having a recess in its side adjacent at least one annular bearing surface which protrudes from the groove for sliding engagement with respect to the cylindrical surface of the second member, and another ring which is of a circumferential shape which permits it to be moved axially of the first member and into a position opposite the recess in the bearing ring, said other ring being of a material which is radially distortible into the recess, but relatively non-elastic so that, when so distorted, it will retain said bearing ring within said groove.

Claim 47

An assembly of the character defined in claim 38, wherein the recess is intermediate protruding annular bearing surfaces on the side of the bearing ring.

Claim 48

An assembly of the character defined in claim 38, wherein the groove in the first member is on the outer side thereof for disposal telescopically within the cylindrical surface on the inner side of the second member, said bearing ring is movable axially over the end of the first member, and the retainer ring is movable axially over the end of the first member and then distorted radially inwardly against the recess in the ring.

Claim 49

For use in sealing between first and second members having cylindrical surfaces adapted to be telescopically disposed with respect to one another, and wherein the inner member has an annular groove formed in its outer cylindrical surface for disposal opposite the inner cylindrical surface of the outer member, a relatively thin seal ring of rubber or other elastic sealing material having an inner side and opposite end surfaces adapted to be closely received within the groove, lips on each end which, when the ring is so received, protrude radially outwardly from the groove so as to be compressed into tight sealing engagement with the cylindrical surface of said outer member, and an annular recess in its outer side intermediate the lips which is adapted to receive a clamping ring.

Claim 50

For use in sealing between first and second members having cylindrical surfaces adapted to be telescopically disposed with respect to one another, and wherein the inner member has an annular groove formed in its outer cylindrical surface for disposal opposite the inner cylindrical surface of the outer member, a relatively thin seal ring of rubber or other elastic sealing material having an inner side and opposite end surfaces adapted to be closely received within the groove, lips on each end which, when the ring is so received, protrude radially outwardly from the groove so as to be compressed into tight sealing engagement with the cylindrical surface of said outer member, and an annular recess in its outer side intermediate the lips which is adapted to receive a clamping ring.

Claim 51

A seal ring of the character defined in claim 41 having a hole therethrough for connecting its outer side with the groove.

Claim 52

For use in sealing between first and second members having cylindrical surfaces adapted to be telescopically disposed with respect to one another, and wherein the inner member has an annular, dove-tail shaped grove formed in its outer cylindrical surface for disposal opposite the inner cylindrical surface of the outer member, a realtively thin seal ring of rubber or other elastic sealing material having an inner side and opposite end surfaces which taper divergently outwardly in a direction toward said inner side for disposal closely within the groove, lips on each end which, when the ring is so disposed, protrude radially outwardly from the groove so as to be compressed into tight sealing engagement with the cylindrical surface of said outer member, and an annular recess in its outer side intermediate the lips which is adapted to receive a clamping ring,

Claim 53

For use in sealing between first and second members having cylindrical surfaces adapted to be telescopically disposed with respect to one another, and wherein the inner member has an annular, dove-tail shaped grove formed in its outer cylindrical surface for disposal opposite the inner cylindrical surface of the outer member, a realtively thin seal ring of rubber or other elastic sealing material having an inner side and opposite end surfaces which taper divergently outwardly in a direction toward said inner side for disposal closely within the groove, lips on each end which, when the ring is so disposed, protrude radially outwardly from the groove so as to be compressed into tight sealing engagement with the cylindrical surface of said outer member, and an annular recess in its outer side intermediate the lips which is adapted to receive a clamping ring,

Claim 54

A seal ring of the character defined in claim 43 having a hole therethrough for connecting its outer side with the groove.

Claim 55

For use in sealing between first and second members having cylindrical surfaces adapted to be telescopically disposed with respect to one another, and wherein the inner member has an annular groove formed in its outer cylindrical surface for disposal opposite the inner cylindrical surface of the outer member and having undercut ends, a seal assembly comprising a relatively thin seal ring of rubber or other elastic sealing material having an inner side for disposal closely within the groove, lips on each which, when the ring is so disposed, protrude radially outwardly from the groove so as to be compressed into tight sealing engagement with the cylindrical surface of said outer member, and an annular recess in its outer side intermediate the lips which is adapted to receive a clamping ring, and a pair of anti-extrusion rings each of which is circumferentially split to permit it to be disposed between an end of the seal ring and an undercut end of the groove, the adjacent ends of the seal ring and anti-extrusion rings being tapered divergently outwardly in a direction toward the inner side of the seal ring whereby the seal ring will be retained by the anti-extrusion ring and the ends of the anti-extrusion rings will be urged by the seal ring into close fitting relation with the undercut ends of the groove.

Claim 56

For use in sealing between first and second members having cylindrical surfaces adapted to be telescopically disposed with respect to one another, and wherein the inner member has an annular groove formed in its outer cylindrical surface for disposal opposite the inner cylindrical surface of the outer member and having undercut ends, a seal assembly comprising a relatively thin seal ring of rubber or other elastic sealing material having an inner side for disposal closely within the groove, lips on each which, when the ring is so disposed, protrude radially outwardly from the groove so as to be compressed into tight sealing engagement with the cylindrical surface of said outer member, and an annular recess in its outer side intermediate the lips which is adapted to receive a clamping ring, and a pair of anti-extrusion rings each of which is circumferentially split to permit it to be disposed between an end of the seal ring and an undercut end of the groove, the adjacent ends of the seal ring and anti-extrusion rings being tapered divergently outwardly in a direction toward the inner side of the seal ring whereby the seal ring will be retained by the anti-extrusion ring and the ends of the anti-extrusion rings will be urged by the seal ring into close fitting relation with the undercut ends of the groove.

Claim 57

A seal assembly the the character defined in claim 45, wherein the seal ring has a hole therethrough for connecting its outer side with the groove.

Claim 58

An assembly for sealing between first and second members having cylindrical surfaces adapted to be telescopically disposed with respect to one another, and wherein the inner member has an annular groove formed in its outer cylindrical surface for disposal opposite the inner cylindrical surface of the outer member, said assembly comprising a relatively thin seal ring of rubber or other elastic sealing material having an inner side and opposite end surfaces adapted to be closely received within the groove, lip on each end which, when the ring is so received, protrude radially outwardly from the groove so as to be compressed into tight sealing engagement with the cylindrical surface of said other outer, an annular recess in its outer side intermediate the lips, and a clamping ring having a circumferential shape which permits it to be moved axially of the first member and into a position opposite the recess in the ring, when the seal ring is received with the groove, said clamping ring being of a material which is radially distortible into the recess, but relatively nonelastic so that, when so distorted, it will retain said seal ring on said first member.

Claim 59

An assembly for sealing between first and second members having cylindrical surfaces adapted to be telescopically disposed with respect to one another, and wherein the inner member has an annular groove formed in its outer cylindrical surface for disposal opposite the inner cylindrical surface of the outer member, said assembly comprising a relatively thin seal ring of rubber or other elastic sealing material having an inner side and opposite end surfaces adapted to be closely received within the groove, lip on each end which, when the ring is so received, protrude radially outwardly from the groove so as to be compressed into tight sealing engagement with the cylindrical surface of said other outer, an annular recess in its outer side intermediate the lips, and a clamping ring having a circumferential shape which permits it to be moved axially of the first member and into a position opposite the recess in the ring, when the seal ring is received with the groove, said clamping ring being of a material which is radially distortible into the recess, but relatively nonelastic so that, when so distorted, it will retain said seal ring on said first member.

Claim 60

A seal assembly of the character defined in claim 47, wherein the seal ring has a hole therethrough for connecting its outer side with the groove.

Claim 61

An assembly sealing between first and second members having cylindrical surfaces adapted to be telescopically disposed with respect to one another, and wherein the inner member has an annular, dove-tail shaped groove formed in its outer cylindrical surface for disposal opposite the inner cylindrical surface of the other member, said assembly including a relatively thin seal ring of rubber to other elastic sealing material having an inner side and opposite end surfaces which taper divergently outwardly in a direction toward said inner side for disposal closely within the groove, lips on each end which, when the ring is so disposed, protrude radially outwardly from the groove so as to be compressed into tight sealing engagement with the cylindrical surface of said outer member, an annular recess in its outer side intermediate the lips, and clamping ring having a circumferential shape which permits it to be moved axially of the first member and into a position opposite the recess in the ring, when the seal ring is received with the groove, said clamping ring being of a material which is radially distortible into the recess, but relatively nonelastic so that, when so distorted, it will retain said seal ring on said first member.

Claim 62

An assembly sealing between first and second members having cylindrical surfaces adapted to be telescopically disposed with respect to one another, and wherein the inner member has an annular, dove-tail shaped groove formed in its outer cylindrical surface for disposal opposite the inner cylindrical surface of the other member, said assembly including a relatively thin seal ring of rubber to other elastic sealing material having an inner side and opposite end surfaces which taper divergently outwardly in a direction toward said inner side for disposal closely within the groove, lips on each end which, when the ring is so disposed, protrude radially outwardly from the groove so as to be compressed into tight sealing engagement with the cylindrical surface of said outer member, an annular recess in its outer side intermediate the lips, and clamping ring having a circumferential shape which permits it to be moved axially of the first member and into a position opposite the recess in the ring, when the seal ring is received with the groove, said clamping ring being of a material which is radially distortible into the recess, but relatively nonelastic so that, when so distorted, it will retain said seal ring on said first member.

Claim 63

A seal assembly of the character defined in claim 49, wherein the sealing ring has a hole therethrough for connecting its outer side with the groove.

Claim 64

An assembly for sealing between first and second members having cylindrical surfaces adapted to be telescopically disposed with respect to one another, and wherein the inner member has an annular groove formed in its outer cylindrical surface for disposal opposite the inner cylindrical surface of the outer member and having undercut ends, said seal assembly comprising a relatively thin seal ring of rubber or other elastic sealing material having an inner side for disposal closely within the groove, lips on each end which, when the ring is so disposed, protrude radially outwardly from the groove so as to be compressed into tight sealing engagement with the cylindrical surface of said outer member, and an annular recess in its outer side intermediate the lips, a pair of anti-extrusion rings each of which is circumferentially split to permit it to be disposed between an end of the seal ring and an undercut end of the groove, the adjacent ends of the seal ring and anti-extrusion rings being tapered divergently outwardly in a direction toward the inner side of the seal ring whereby the seal ring will be retained by the anti-extrusion ring and the ends of the anti-extrusion rings will be urged by the seal ring into close fitting relation with the undercut ends of the groove, and a clamping ring having a circumferential shape which permits it to be moved axially of the first member and into a position opposite the recess in the ring, when the seal ring is received with the groove, said clamping ring being being of a material which is radially distortible into the recess, but relatively nonelastic so that, when so distorted, it will retain said seal ring on said first member.

Claim 65

An assembly for sealing between first and second members having cylindrical surfaces adapted to be telescopically disposed with respect to one another, and wherein the inner member has an annular groove formed in its outer cylindrical surface for disposal opposite the inner cylindrical surface of the outer member and having undercut ends, said seal assembly comprising a relatively thin seal ring of rubber or other elastic sealing material having an inner side for disposal closely within the groove, lips on each end which, when the ring is so disposed, protrude radially outwardly from the groove so as to be compressed into tight sealing engagement with the cylindrical surface of said outer member, and an annular recess in its outer side intermediate the lips, a pair of anti-extrusion rings each of which is circumferentially split to permit it to be disposed between an end of the seal ring and an undercut end of the groove, the adjacent ends of the seal ring and anti-extrusion rings being tapered divergently outwardly in a direction toward the inner side of the seal ring whereby the seal ring will be retained by the anti-extrusion ring and the ends of the anti-extrusion rings will be urged by the seal ring into close fitting relation with the undercut ends of the groove, and a clamping ring having a circumferential shape which permits it to be moved axially of the first member and into a position opposite the recess in the ring, when the seal ring is received with the groove, said clamping ring being being of a material which is radially distortible into the recess, but relatively nonelastic so that, when so distorted, it will retain said seal ring on said first member.

Claim 66

A seal assembly of the character defined in claim 51, wherein the seal ring has a hole therethrough for connecting its outer side with the groove.