patents resist leakage of the liquid past the valve body to the port. In optional variations, the ring-shaped seal includes at least one of the following: a ring carried in a groove that is recessed into the valve body, and first and second rings disposed around the valve body and biased apart from each other. In another option, the first and second rings are disposed on a stationary part of the internal combustion engine such that the valve body moves relative to these rings. Patent number: WO/2014/205291 Inventor: J.M. Cleeves Publication date: 24 December 2014
individually fixed to at least one metal layer via separate bond joints. Patent number: WO/2014/200995 Inventors: T. Swasey and C.J. Magewick Publication date: 18 December 2014
“Swellable” energisers for oil and gas wells Applicant: Freudenberg Oil & Gas Llc, USA This patent provides details of a seal stack. In particular, this disclosure relates to the use of a fluid “swellable” material that is used to energise a seal in an oil and gas well. It incorporates a sealing element that includes an annular seal ring, with a specific diameter and through which is defined an axis (oriented perpendicular to the diameter). A groove, defined in the seal ring, has an opening at a first end of the ring. The energiser, disposed in the groove, swells upon exposure to a solvent, causing the seal ring to expand. The seal stack also includes first and second annular back-ups, provided at opposing ends of the sealing element. The first back-up includes an interior surface that receives the second end of the sealing element. Patent number: WO/2014/200608 Inventor: S.G. Porta Publication date: 18 December 2014
High-temperature, high-pressure, fluid-tight seal using a series of annular rings Applicant: Halliburton Energy Services Inc, USA The aim of this invention is to create a novel and useful fluid-tight, metal-to-metal, annular seal that can be cycled repeatedly in a hightemperature, high-pressure environment. More specifically, the associated patent provides details of a metal-to-metal, annular, seal on a radially expandable sliding sleeve, which moves longitudinally from a reduced (inside diameter) section of a bore to an enlarged section of the bore. The seal is disengaged at the enlarged bore section, resulting in rapid fluid flow and pressure equalisation which, say the inventors, would destroy many traditional elastomer seals. Patent number: WO/2014/200469 Inventors: S.S. Haake and M.H. Strumpell Publication date: 18 December 2014
Seal arrangement for a propeller shaft Applicant/Inventor: H. Aumüller, Germany This invention relates to an arrangement (1) for sealing an opening (2) in a partition (3) – in particular, in a ship bulkhead. A driveshaft (4)
One embodiment of the seal arrangement for a propeller shaft detailed by patent WO/2014/202516. The figure above shows this arrangement in the form of a bulkhead seal. The bulkhead seal (1) has a housing with three axially separate parts 51, 52 and 53. On the middle part (52) the bulkhead seal is fixed in the region of the opening (2) in the partition wall (3).
is led through the opening. The arrangement comprises the following: a housing (5), in particular a multipart housing, which is rigidly connected to a partition (3) and surrounds the driveshaft (4) in the region of the partition (3); and two graphite seal rings (6), which are held in the housing (5) in an axially adjacent manner and surround the driveshaft (4). The housing (5), the driveshaft (4) and the two graphite seal rings (6) delimit a first annular chamber (81). A third graphite seal ring is provided that is held in the housing (5) axially to the other graphite seal rings, surrounds the driveshaft (4) and delimits a second annular chamber (82) together with the housing (5) and the driveshaft (4). This annular chamber axially adjoins the first annular chamber (81). Patent number: WO/2014/202516 Publication date: 18 December 2014
Seal assemblies for use with fluid valves Applicant: Fisher Controls International Llc, USA In this patent, seal assemblies for use with fluid valves are discussed. This patent provides details of an apparatus that includes a cage (124), a plug (122), with a seal gland (148), and a seal assembly (300), which is at least partially positioned in the seal gland. The seal assembly includes a back-up ring (302) with a wedgeshaped protrusion (310) and a seal, defining a wedge-shaped groove (312) to receive this protrusion. Pressure acting on the back-up ring urges the protrusion into the groove. An engagement between the protrusion and the groove forces the seal to engage with an inner surface (126) of the cage. Patent number: WO/2014/205033 Inventors: J.A. Mann and S.W. Anderson Publication date: 24 December 2014
Sleeve valve oil seal Applicant: Pinnacle Engines Inc, USA This patent relates generally to seals for preventing leakage of a liquid (for example, a coolant or lubricant) past a sleeve valve to a port in an engine’s combustion chamber. In one aspect, a sleeve valve assembly includes a sleeve valve and a ring-shaped seal. The sleeve valve has a valve body configured to at least partially encircle one or more pistons that move(s) in a reciprocating manner. The sleeve valve and the (one or more) pistons at least partially define the combustion chamber of the internal combustion engine. The sleeve valve is configured to move between an open and closed position to control fluid flow through a port that opens into the combustion chamber. The ring-shaped seal is configured to
An example of the seal assembly (300), the details of which are presented in patent WO/2014/205033. In this example, the seal assembly includes the retainer (140), a back-up ring and/or male portion (302) and a female portion (304).