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Cylinder-head gasket
PATENTS Technical Editor’s comment: I was not able to discern the novel features of this design from the patent abstract.
Segmented leaf seal Applicant: Mitsubishi Heavy Industries Ltd, Japan A segmented leaf seal forms the subject of this patent. A feature of this design is that the leaves close to the ends of the segments are shorter than those in the remainder of the seal. Publication number: WO/2010/146805 Inventors: H. Uehara, T. Shinohara, T. Nakano and S. Nishimoto Publication date: 23 December 2010
Rotary seal with supported inlet Applicants/Inventors: L.L Dietle and J.D. Gobeli – USA This invention concerns a hydrodynamically lubricated sealing element for applications where the pressure of a contained fluid can be significantly greater than the pressure of the seal lubricant. It has been developed to provide a simple and compact, rotary sealing arrangement for containing a pressurised media such as oilfield drilling fluid. The rotary seal described has the advantage of being able to maintain a film of lubricant at the dynamic sealing interface during rotary operation, without requiring the undesirable complexity of a wavy back-up ring, and similarly without maintaining the lubricant at a pressure that is greater than that of the pressurised media. Hydrodynamic geometry on the dynamic sealing lip entrains lubricant during rotation – to wedge a lubricating film into the dynamic sealing interface. The lubricating film is distributed across the dynamic sealing interface and migrates towards and into the pressurised fluid, and provides a contaminant flushing action. Publication number: WO/2010/148028 Publication date: 23 December 2010 Technical Editor’s comment: Readers familiar with this market may notice the apparent similarity to the well established Kalsi seal. An advantage claimed for this seal is that it works at high pressure differentials. And, you may also have guessed that one of the applicants previously worked for Kalsi Engineering.
Flat seal with solid bead Applicant: Federal-Mogul Sealing Systems, Germany This invention relates to a metal, flat seal that has a solid bead pressed into a metal
May 2011
layer. A sequence of depressions is pressed into the bead layer around the circumference. A wide variety of designs are illustrated. Publication number: WO/2010/149774 Inventors: K. Schmitt and B. Schneider Publication date: 29 December 2010
Seal structure Applicant: NOK Corp, Japan A seal for electrical components is described. The sealing grommet is moulded onto the wiring insulation so that it forms an integral part of the wiring and improves sealing performance. At least one variant shows a pair of seals – one for each end of a cable. Publication number: WO/2010/150591 Inventors: T. Hayashi and K. Miyajima Publication date: 29 December 2010
Cylinder-head gasket
surrounding tubular element, is halted, and a metal-to-metal barrier is formed between the anchor ring and the surrounding tubular element. As the setting sleeve continues to move axially downwards, the sleeve and the actuating ring are moved further downwards with respect to the inner mandrel. The packer element is axially compressed between the retaining ring and the anchor ring, thereby causing it to expand radially outwards to form a resilient fluid seal against the surrounding tubular element. Eventually, downward movement of the setting sleeve will cause the actuating ring to move radially outwards and into contact with the surrounding tubular element. This contact creates a second metal-to-metal barrier between the packer device and the surrounding tubular element. Publication number: WO/2010/151905 Inventors: J.C. Doane and S.I. Robinson Publication date: 29 December 2010
Applicant: Federal-Mogul Corp, USA A cylinder-head gasket forms the subject of this patent. The top functional layer contains a full bead and a half bead. The half bead is located between the full bead and the free edge. There also may be a distance layer under the half bead in order to provide additional ‘energisation’. The purpose of this design is to provide improved resistance to failure of the edge of the gasket while the engine is operating. Publication number: WO/2010/151616 Inventors: T. Okano and J. Hu Publication date: 29 December 2010
High-pressure, hightemperature packer seal Applicant: Baker Hughes Inc, USA Ramp set packer elements typically require the elastomeric sealing element to be bonded to a steel insert. But it is currently not feasible to bond elastomers, which are greatly resistant to high temperatures and pressures, to such inserts. Ramp set seals also have a tendency to leak when pressure is applied to the side that has the smaller cross-section, because the pressure pushes the seal element down the ramp. In the design detailed by this patent, an anchor ring and a retaining ring are located on opposite axial sides of the packer element. The retaining ring is secured to the sleeve, while the anchor ring is axially moveable with respect to the sleeve. Once the anchor ring is brought into contact with the surrounding tubular element, downward movement of the anchor ring, with respect to the
Patent WO/2010/151905 provides details of a packer device which includes an elastomeric element which is seated upon an inner sleeve that surrounds a central inner mandrel. It is designed for use in high-pressure and high-temperature applications.
Sealing Technology
15
Segmented leaf seal Applicant: Mitsubishi Heavy Industries Ltd, Japan A segmented leaf seal forms the subject of this patent. A feature of this design is that the leaves close to the ends of the segments are shorter than those in the remainder of the seal. Publication number: WO/2010/146805 Inventors: H. Uehara, T. Shinohara, T. Nakano and S. Nishimoto Publication date: 23 December 2010
Rotary seal with supported inlet Applicants/Inventors: L.L Dietle and J.D. Gobeli – USA This invention concerns a hydrodynamically lubricated sealing element for applications where the pressure of a contained fluid can be significantly greater than the pressure of the seal lubricant. It has been developed to provide a simple and compact, rotary sealing arrangement for containing a pressurised media such as oilfield drilling fluid. The rotary seal described has the advantage of being able to maintain a film of lubricant at the dynamic sealing interface during rotary operation, without requiring the undesirable complexity of a wavy back-up ring, and similarly without maintaining the lubricant at a pressure that is greater than that of the pressurised media. Hydrodynamic geometry on the dynamic sealing lip entrains lubricant during rotation – to wedge a lubricating film into the dynamic sealing interface. The lubricating film is distributed across the dynamic sealing interface and migrates towards and into the pressurised fluid, and provides a contaminant flushing action. Publication number: WO/2010/148028 Publication date: 23 December 2010 Technical Editor’s comment: Readers familiar with this market may notice the apparent similarity to the well established Kalsi seal. An advantage claimed for this seal is that it works at high pressure differentials. And, you may also have guessed that one of the applicants previously worked for Kalsi Engineering.
Flat seal with solid bead Applicant: Federal-Mogul Sealing Systems, Germany This invention relates to a metal, flat seal that has a solid bead pressed into a metal
May 2011
layer. A sequence of depressions is pressed into the bead layer around the circumference. A wide variety of designs are illustrated. Publication number: WO/2010/149774 Inventors: K. Schmitt and B. Schneider Publication date: 29 December 2010
Seal structure Applicant: NOK Corp, Japan A seal for electrical components is described. The sealing grommet is moulded onto the wiring insulation so that it forms an integral part of the wiring and improves sealing performance. At least one variant shows a pair of seals – one for each end of a cable. Publication number: WO/2010/150591 Inventors: T. Hayashi and K. Miyajima Publication date: 29 December 2010
Cylinder-head gasket
surrounding tubular element, is halted, and a metal-to-metal barrier is formed between the anchor ring and the surrounding tubular element. As the setting sleeve continues to move axially downwards, the sleeve and the actuating ring are moved further downwards with respect to the inner mandrel. The packer element is axially compressed between the retaining ring and the anchor ring, thereby causing it to expand radially outwards to form a resilient fluid seal against the surrounding tubular element. Eventually, downward movement of the setting sleeve will cause the actuating ring to move radially outwards and into contact with the surrounding tubular element. This contact creates a second metal-to-metal barrier between the packer device and the surrounding tubular element. Publication number: WO/2010/151905 Inventors: J.C. Doane and S.I. Robinson Publication date: 29 December 2010
Applicant: Federal-Mogul Corp, USA A cylinder-head gasket forms the subject of this patent. The top functional layer contains a full bead and a half bead. The half bead is located between the full bead and the free edge. There also may be a distance layer under the half bead in order to provide additional ‘energisation’. The purpose of this design is to provide improved resistance to failure of the edge of the gasket while the engine is operating. Publication number: WO/2010/151616 Inventors: T. Okano and J. Hu Publication date: 29 December 2010
High-pressure, hightemperature packer seal Applicant: Baker Hughes Inc, USA Ramp set packer elements typically require the elastomeric sealing element to be bonded to a steel insert. But it is currently not feasible to bond elastomers, which are greatly resistant to high temperatures and pressures, to such inserts. Ramp set seals also have a tendency to leak when pressure is applied to the side that has the smaller cross-section, because the pressure pushes the seal element down the ramp. In the design detailed by this patent, an anchor ring and a retaining ring are located on opposite axial sides of the packer element. The retaining ring is secured to the sleeve, while the anchor ring is axially moveable with respect to the sleeve. Once the anchor ring is brought into contact with the surrounding tubular element, downward movement of the anchor ring, with respect to the
Patent WO/2010/151905 provides details of a packer device which includes an elastomeric element which is seated upon an inner sleeve that surrounds a central inner mandrel. It is designed for use in high-pressure and high-temperature applications.
Sealing Technology
15