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Rolling bearing with integrated seal
PATENTS Sealing strip for a motor vehicle’s window Applicant: Peugeot Citroën Automobiles Sa, France This invention relates to an assembly, including an outer window sealing strip, for a motor vehicle’s side door. It is intended to be attached along the upper edge of the outer panel of the side door. The assembly is characterised in that one end of the sealing strip includes an attachment that engages with a complementary attachment (provided on the trim) so as to be able to reference the end relative to the trim along the longitudinal, transverse and the vertical axes of the vehicle. The end of the outer sealing strip includes an elongate recess along its length that leads to the end point. The trim also has – in the attachment at end of the sealing strip – a tab that projects relative to an outer surface of the trim. This recess engages with the tab (of the trim). Patent number: WO/2011/135220 Inventors: G. Grunchec and X. Guilly Publication date: 3 November 2011
Piston ring Applicants: X. Li and S. Wang – China Inner and outer tooth-type piston rings for sealing a gas are described by this patent. The ring has a vertical stepped butt joint. A feature claimed is that the steps in the butt are located on an arc that is based on the same centre as the piston-ring radius. The actual application and whether or not this is a pure, gas piston ring are not obvious. Patent number: WO/2011/137747 Inventor: X. Li Publication date: 3 November 2011
Sealing element for an electrical connector Applicant: Tyco Electronics Amp GmbH, Germany This invention relates to a component for sealing electric cable glands on connectors. The sealing element has an elastically expandable inner sleeve. The gland has separate inner and outer sealing components so that the size of cable fitted has less of an effect on sealing the outside diameter of the gland, and permits a wide range of cable sizes to be used. Patent number: WO/2011/138182 Inventors: S. Hein, M. Szelag and A. Herrmann Publication date: 3 November 2011
May 2012
EMI shielding gasket assembly Applicant: Molex Inc, USA This patent provides details of a gasket assembly for use in an angled electromagnetic interference (EMI) shielding cage. A problem associated with most connectors and their shielding cages is that they are mounted perpendicular to the face plate so that when plug connectors are inserted (in a ‘‘straight-on’’ manner) into the cages – to mate with the internal connectors – the cables extend straight outwards from the device. The gasket frame described has guides disposed on one side of it that make contact with the cage and orient it at an angle to the gasket frame. The gasket frame further includes at least a pair of clips that retain a conductive, compressible component in place around the frame opening. Patent number: WO/2011/140064 Inventors: D.P. Cantrell and K. Janota Publication date: 10 November 2011
A cryo-preservation device for storing reproductive biological material forms the subject of this patent. A concentric tube-shaped device is described. This may be slid together once a sample has been added. Two or more ‘‘bulge portions’’, or a flared portion, create the seal between the respective tubes. Patent number: WO/2011/140299 Publication date: 10 November 2011
Vacuum dynamic seal Applicant: Dongguan Anwell Digital Machinery Co Ltd, China A device for transmitting an optically encoded rotary signal into a vacuum chamber forms the subject of this patent. The details of the actual seal are not described in the English abstract. Patent number: WO/2011/137689 Inventors: M. Yeung, Y. Wang, H. Liu, K. Fan, Y. Wang, M. Wang >`Ê°Ê< >} Publication date: 10 November 2011
Tunable floating seal insert Applicant: Cameron International Corp, USA The seal detailed by this patent is part of an assembly used in an oil well to attenuate shock waves in the system. An installation is provided in which a floating restrictor device may be fitted – with the bore of the restrictor selected to achieve the flow control that is required. The restrictor is allowed to float axially over a limited stroke and is sealed on the outside diameter by the seal discussed, which is described as an O-ring. Patent number: WO/2011/139399 Inventor: J. Kotrla Publication date: 10 November 2011
Brush ring seal Applicant: Elliott Co, USA The brush seal described by this patent is manufactured in segments and retained as a unit by a garter spring. It is designed to replace carbon segmented rings used in steam turbines. The rear face of the brush seal carrier is coated with an anti-friction coating. This enables movement of the brush ring seal device within its packing case. Patent number: WO/2011/139741 Inventor: M.A. Mindock (III) Publication date: 10 November 2011
Carrier incorporating a seal for cryogenic storage applications Applicants/Inventors: B.K. Butler, T.W. Wingler, J.M. Carlson and S.K. Philhower – USA
Rolling bearing with integrated seal Applicant: Schaeffler Technologies Ag & Co Kg, Germany This invention relates to a rolling bearing (2) containing an integrated seal which consists of an annular sealing disc (10) that has elastic properties, and which is inserted, with a first edge (14), into a retaining groove (16) in one (4) of the bearing rings, while the other second edge (18) engages slidably in a sealing groove arrangement (20) on the other bearing ring (6). In order to protect the sealing disc (10) against deformation, while at the same time retaining the elastic properties – enabling it (the sealing disc), in the case of self-aligning bearings, to follow a tilting motion of the outer bearing ring and optionally allow for axial play and/or radial play of the bearing rings relative to each other – it is reinforced and stiffened at an edge region (b) adjacent to the first edge (14) by a
This seal – for self-aligning bearings – has a structure that combines both a reinforced section, to resist deformation, and a flexible section to enable relative movement of the inner and outer race. Patent WO/2011/138107 has further details.
Sealing Technology
13
PATENTS reinforcement (12), while the remaining region (c) of the sealing disc is designed to be elastic. A number of variations are illustrated. Patent number: WO/2011/138107 Inventors: M. Grehn, R. Schröder and F. Hofbauer Publication date: 10 November 2011
Rod seal Applicant: SME, France This invention relates to a triggered-stroke actuator which, for example, is incorporated into a system for protecting pedestrians in the event of frontal impact with a motor vehicle. The rod seal is retained in a pair of half-depth grooves – one in the rod and the other in the housing. This restrains the rod in position until the actuator is triggered; at which point the seal is sheared. Patent number: WO/2011/138553 Inventors: F. Marlin and J.-P. Nadeau Publication date: 10 November 2011
Seal for a trocar Applicant: AB Medica Spa, Italy This invention concerns a sealing device for trocar (a surgical instrument with a three-sided cutting point, used for withdrawing fluid from a body cavity, especially in oedema). It comprises a series of ‘‘rigid’’ elastic conical elements and interspersed soft elastic elements. Patent number: WO/2011/138812 Inventor: F. Orlandi Publication date: 10 November 2011
Method for detecting the tightness of threaded joints in drill rods Applicant: Sandvik Mining and Construction Oy, Finland This invention relates to a method, and an apparatus, for detecting the tightness of threaded joints in drill rods when unfastening at least one threaded joint of the drilling equipment. A vibration signal, measured during impacting, is compared with a model that describes fastened and unfastened states. Patent number: WO/2011/138510 Inventors: T. Pirinen, J. Hakala, A. Klapuri and V. Uitto Publication date: 10 November 2011
Sealing assembly in a thrustbearing kingpin application Applicant: NRB Bearings Ltd, India A kingpin assembly that includes an axially facing lip seal to act as both a grease seal and excluder (to resist the ingress of contaminants) is detailed by this patent. Presumably it is designed for use in off-road or other heavy-duty vehicles, but no application area is mentioned. Patent number: WO/2011/138800 Inventor: S.T. Salunke Publication date: 10 November 2011
Dust seal for a gyratory crusher Applicant: Sandvik Intellectual Property Ab, Sweden This invention relates to a dust seal for a gyratory crusher and a method of fitting this seal in the crusher. The seal bellows is adapted to accommodate a vertical movement of the 14
Sealing Technology
Sealing assembly for a rolling bearing The face seal design described by patent WO/2011/139210 has been developed for use in part of a gyratory crusher.
crusher head of at least 100 mm with no loss of ‘‘dust tightness’’. According to an embodiment, the seal bellows is composed of a sealing layer of natural or synthetic rubber. This makes it possible to achieve a high degree of dust tightness and good flexibility. According to a preferred embodiment, the seal bellows is tangentially stiffened by reinforcing inserts to ensure it is able to withstand the torsional force exerted by the crusher head. The seal slide-ring is made of nylon and does not require any lubrication. Patent number: WO/2011/139210 Inventor: H. Johansson Publication date: 10 November 2011
Device for hermetically sealing large openings in an apparatus Applicant: Andritz Technology and Asset Management GmbH, Austria This patent covers a U-sectioned clamp, or ‘‘strong-back-type’’ device that is restrained by studs welded into a structure. This is used to retain plates that contain a seal in a grove around the periphery and seal an opening in large structures. Patent number: WO/2011/137468 Inventors:Ê°Ê<ii]Ê*°Ê Ài and K. Stanke Publication date: 10 November 2011 Technical Editor’s comment: I am not sure how this is patentable as it appears to me to be typical of standard practice – probably since the nineteenth century – for retaining inspection doors on large items of plant.
Applicant: IMO Holding GmbH, Germany The subject of this patent is a sealing assembly for rolling bearings – especially large inaccessible bearings used in machinery such as a wind turbines. According to the patent, at least two sealing rings are provided and are shown to be working in series. Those illustrated have a U-ring section with a rotary seal geometry on the dynamic lip. Patent number: WO/2011/141125 Inventors: H. Frank, E. Russ and W. Schröppel Publication date: 17 November 2011
Seal arrangement Applicant: Aktiebolaget SKF, Sweden This invention relates to an arrangement for sealing one region of a machine part from another. According to the patent, in order to better protect the seal arrangement against the infiltration of moisture, the seal element and/ or the machine part and/or the component connected to the machine part, is coated by a material that has an omniphobic property. This material is ideally a silane or a trichlorosilane, but preferably an octadecyl trichlorosilane (OTS) or a perfluorooctyl-trichlorosilane (PFOTS). The sealing arrangement also includes a dust-cover lip, which consists of elastomeric or nonwoven material. The surface of the dust-cover lip is coated, at least partially, with a material that has omniphobic and/or hydrophobic properties. This functions as a secondary sealing lip seal and can be made, in particular, of a porous non-woven material whose fibres are coated with a (super) hydrophobic or (super) omniphobic material. One advantage is a reduction in friction of the sealing edge of the seal counter-face, whereby considerably reduced energy consumption and wear of the
May 2012
Piston ring Applicants: X. Li and S. Wang – China Inner and outer tooth-type piston rings for sealing a gas are described by this patent. The ring has a vertical stepped butt joint. A feature claimed is that the steps in the butt are located on an arc that is based on the same centre as the piston-ring radius. The actual application and whether or not this is a pure, gas piston ring are not obvious. Patent number: WO/2011/137747 Inventor: X. Li Publication date: 3 November 2011
Sealing element for an electrical connector Applicant: Tyco Electronics Amp GmbH, Germany This invention relates to a component for sealing electric cable glands on connectors. The sealing element has an elastically expandable inner sleeve. The gland has separate inner and outer sealing components so that the size of cable fitted has less of an effect on sealing the outside diameter of the gland, and permits a wide range of cable sizes to be used. Patent number: WO/2011/138182 Inventors: S. Hein, M. Szelag and A. Herrmann Publication date: 3 November 2011
May 2012
EMI shielding gasket assembly Applicant: Molex Inc, USA This patent provides details of a gasket assembly for use in an angled electromagnetic interference (EMI) shielding cage. A problem associated with most connectors and their shielding cages is that they are mounted perpendicular to the face plate so that when plug connectors are inserted (in a ‘‘straight-on’’ manner) into the cages – to mate with the internal connectors – the cables extend straight outwards from the device. The gasket frame described has guides disposed on one side of it that make contact with the cage and orient it at an angle to the gasket frame. The gasket frame further includes at least a pair of clips that retain a conductive, compressible component in place around the frame opening. Patent number: WO/2011/140064 Inventors: D.P. Cantrell and K. Janota Publication date: 10 November 2011
A cryo-preservation device for storing reproductive biological material forms the subject of this patent. A concentric tube-shaped device is described. This may be slid together once a sample has been added. Two or more ‘‘bulge portions’’, or a flared portion, create the seal between the respective tubes. Patent number: WO/2011/140299 Publication date: 10 November 2011
Vacuum dynamic seal Applicant: Dongguan Anwell Digital Machinery Co Ltd, China A device for transmitting an optically encoded rotary signal into a vacuum chamber forms the subject of this patent. The details of the actual seal are not described in the English abstract. Patent number: WO/2011/137689 Inventors: M. Yeung, Y. Wang, H. Liu, K. Fan, Y. Wang, M. Wang >`Ê°Ê< >} Publication date: 10 November 2011
Tunable floating seal insert Applicant: Cameron International Corp, USA The seal detailed by this patent is part of an assembly used in an oil well to attenuate shock waves in the system. An installation is provided in which a floating restrictor device may be fitted – with the bore of the restrictor selected to achieve the flow control that is required. The restrictor is allowed to float axially over a limited stroke and is sealed on the outside diameter by the seal discussed, which is described as an O-ring. Patent number: WO/2011/139399 Inventor: J. Kotrla Publication date: 10 November 2011
Brush ring seal Applicant: Elliott Co, USA The brush seal described by this patent is manufactured in segments and retained as a unit by a garter spring. It is designed to replace carbon segmented rings used in steam turbines. The rear face of the brush seal carrier is coated with an anti-friction coating. This enables movement of the brush ring seal device within its packing case. Patent number: WO/2011/139741 Inventor: M.A. Mindock (III) Publication date: 10 November 2011
Carrier incorporating a seal for cryogenic storage applications Applicants/Inventors: B.K. Butler, T.W. Wingler, J.M. Carlson and S.K. Philhower – USA
Rolling bearing with integrated seal Applicant: Schaeffler Technologies Ag & Co Kg, Germany This invention relates to a rolling bearing (2) containing an integrated seal which consists of an annular sealing disc (10) that has elastic properties, and which is inserted, with a first edge (14), into a retaining groove (16) in one (4) of the bearing rings, while the other second edge (18) engages slidably in a sealing groove arrangement (20) on the other bearing ring (6). In order to protect the sealing disc (10) against deformation, while at the same time retaining the elastic properties – enabling it (the sealing disc), in the case of self-aligning bearings, to follow a tilting motion of the outer bearing ring and optionally allow for axial play and/or radial play of the bearing rings relative to each other – it is reinforced and stiffened at an edge region (b) adjacent to the first edge (14) by a
This seal – for self-aligning bearings – has a structure that combines both a reinforced section, to resist deformation, and a flexible section to enable relative movement of the inner and outer race. Patent WO/2011/138107 has further details.
Sealing Technology
13
PATENTS reinforcement (12), while the remaining region (c) of the sealing disc is designed to be elastic. A number of variations are illustrated. Patent number: WO/2011/138107 Inventors: M. Grehn, R. Schröder and F. Hofbauer Publication date: 10 November 2011
Rod seal Applicant: SME, France This invention relates to a triggered-stroke actuator which, for example, is incorporated into a system for protecting pedestrians in the event of frontal impact with a motor vehicle. The rod seal is retained in a pair of half-depth grooves – one in the rod and the other in the housing. This restrains the rod in position until the actuator is triggered; at which point the seal is sheared. Patent number: WO/2011/138553 Inventors: F. Marlin and J.-P. Nadeau Publication date: 10 November 2011
Seal for a trocar Applicant: AB Medica Spa, Italy This invention concerns a sealing device for trocar (a surgical instrument with a three-sided cutting point, used for withdrawing fluid from a body cavity, especially in oedema). It comprises a series of ‘‘rigid’’ elastic conical elements and interspersed soft elastic elements. Patent number: WO/2011/138812 Inventor: F. Orlandi Publication date: 10 November 2011
Method for detecting the tightness of threaded joints in drill rods Applicant: Sandvik Mining and Construction Oy, Finland This invention relates to a method, and an apparatus, for detecting the tightness of threaded joints in drill rods when unfastening at least one threaded joint of the drilling equipment. A vibration signal, measured during impacting, is compared with a model that describes fastened and unfastened states. Patent number: WO/2011/138510 Inventors: T. Pirinen, J. Hakala, A. Klapuri and V. Uitto Publication date: 10 November 2011
Sealing assembly in a thrustbearing kingpin application Applicant: NRB Bearings Ltd, India A kingpin assembly that includes an axially facing lip seal to act as both a grease seal and excluder (to resist the ingress of contaminants) is detailed by this patent. Presumably it is designed for use in off-road or other heavy-duty vehicles, but no application area is mentioned. Patent number: WO/2011/138800 Inventor: S.T. Salunke Publication date: 10 November 2011
Dust seal for a gyratory crusher Applicant: Sandvik Intellectual Property Ab, Sweden This invention relates to a dust seal for a gyratory crusher and a method of fitting this seal in the crusher. The seal bellows is adapted to accommodate a vertical movement of the 14
Sealing Technology
Sealing assembly for a rolling bearing The face seal design described by patent WO/2011/139210 has been developed for use in part of a gyratory crusher.
crusher head of at least 100 mm with no loss of ‘‘dust tightness’’. According to an embodiment, the seal bellows is composed of a sealing layer of natural or synthetic rubber. This makes it possible to achieve a high degree of dust tightness and good flexibility. According to a preferred embodiment, the seal bellows is tangentially stiffened by reinforcing inserts to ensure it is able to withstand the torsional force exerted by the crusher head. The seal slide-ring is made of nylon and does not require any lubrication. Patent number: WO/2011/139210 Inventor: H. Johansson Publication date: 10 November 2011
Device for hermetically sealing large openings in an apparatus Applicant: Andritz Technology and Asset Management GmbH, Austria This patent covers a U-sectioned clamp, or ‘‘strong-back-type’’ device that is restrained by studs welded into a structure. This is used to retain plates that contain a seal in a grove around the periphery and seal an opening in large structures. Patent number: WO/2011/137468 Inventors:Ê°Ê<ii]Ê*°Ê Ài and K. Stanke Publication date: 10 November 2011 Technical Editor’s comment: I am not sure how this is patentable as it appears to me to be typical of standard practice – probably since the nineteenth century – for retaining inspection doors on large items of plant.
Applicant: IMO Holding GmbH, Germany The subject of this patent is a sealing assembly for rolling bearings – especially large inaccessible bearings used in machinery such as a wind turbines. According to the patent, at least two sealing rings are provided and are shown to be working in series. Those illustrated have a U-ring section with a rotary seal geometry on the dynamic lip. Patent number: WO/2011/141125 Inventors: H. Frank, E. Russ and W. Schröppel Publication date: 17 November 2011
Seal arrangement Applicant: Aktiebolaget SKF, Sweden This invention relates to an arrangement for sealing one region of a machine part from another. According to the patent, in order to better protect the seal arrangement against the infiltration of moisture, the seal element and/ or the machine part and/or the component connected to the machine part, is coated by a material that has an omniphobic property. This material is ideally a silane or a trichlorosilane, but preferably an octadecyl trichlorosilane (OTS) or a perfluorooctyl-trichlorosilane (PFOTS). The sealing arrangement also includes a dust-cover lip, which consists of elastomeric or nonwoven material. The surface of the dust-cover lip is coated, at least partially, with a material that has omniphobic and/or hydrophobic properties. This functions as a secondary sealing lip seal and can be made, in particular, of a porous non-woven material whose fibres are coated with a (super) hydrophobic or (super) omniphobic material. One advantage is a reduction in friction of the sealing edge of the seal counter-face, whereby considerably reduced energy consumption and wear of the
May 2012