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WO/1999/056042A1 |
Split sealing ring for any piston system, like internal combustion engines, compressors, for pipe connections and hydraulic devices. The ring is fitted with its inner diameter and face distance to the piston groove and to the ring groove...
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WO/1999/037941A1 |
The invention concerns an internal combustion engine piston comprising a plurality of holes (10) bored from the piston head (2) parallel to the axis thereof and opening on the first piston groove (4) closest to the head (2). Said holes (...
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WO/1999/036302A1 |
A seal (40, 60) receivable within an annular groove (25) having opposed radial surfaces (35, 36) and carried by one of a pair of reciprocally movable members (20, 22) for sealing engagement with the sidewall of the other of the pair of r...
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WO/1999/032812A1 |
The invention concerns an arrangement in piston rings (1, 1a) of the kind, which are formed with a gap (6, 6a) and which are arranged in their respective one of annual ring-receiving grooves (4) formed in combustion-engine pistons. The e...
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WO/1999/024741A1 |
An accumulator piston (10) for an automatic transmission (12). The piston (10) comprises two components, the first and second being cup elements (32 and 36) welded together with their closed ends in abutting relation. The lower cup (32) ...
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WO/1999/002898A1 |
A piston assembly (330) for a double-acting engine (10) such as a double-acting Stirling engine. A pair of sealing rings (380, 382) located on opposite sides of a sealing washer (370) are positioned between a base section (350) and a dom...
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WO/1998/049472A1 |
The present invention provides a seal ring for placement in the space between a radial groove of a cylindrical member and a housing forming a bore in which the cylindrical member is movably positioned, which is free of scoring and has a ...
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WO/1998/046915A1 |
The invention relates to an internal combustion piston engine, specially a powerful diesel engine, comprising at least one piston (1) arranged in a cylinder (2). Said piston is provided with a set of piston rings comprising several pisto...
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WO/1998/046914A1 |
The invention relates to an internal combustion piston engine, specially a powerful diesel engine, comprising at least one piston (1) arranged in a cylinder (2), said piston being provided with peripheral grooves (6). Each groove is assi...
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WO/1998/044281A1 |
A seal assembly includes a first annular member (40) and replaceable second annular member (42) which reside in axial juxtaposition to be carried by one of a pair of coaxially movable components (20, 22) for sealingly engaging the other ...
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WO/1998/041749A1 |
A piston (1) for a two-stroke crosshead engine has a number of ring grooves (2-4) for piston rings. At at least some of the rings the piston has pressure relief passages the axes of which avoid hitting the piston ring (14) at extension t...
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WO/1998/027328A1 |
A ring-shaped plate member (6) of a three-layer structure having an aluminium alloy material (8) disposed on the opposite sides of a copper alloy material (7) is formed by casting in the outer peripheral part (2) of a piston (1) made of ...
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WO/1998/019084A1 |
Piston rings and/or a piston in a two-stroke crosshead engine are provided on their radial outer surfaces with a running-in layer (32, 37, 40, 42), which has a thickness of at least 0.1 mm in the radial direction and is made of a materia...
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WO/1998/016763A1 |
A one-piece piston ring (10) with fully sealed gap joint (24), having a pair of overlapping, slidable, and tapered ends (30, 32), separated by an axially parallel line (25) extended along a long arc (24). The arc starts from and forms a ...
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WO/1998/008009A2 |
This invention concerns a packing seal which is intended particularly for reciprocating piston engines and which, for example, can be placed in the groove (31) around the circumference of a piston (22) of a reciprocating engine. The pack...
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WO/1998/004853A1 |
In a method of manufacturing a sealing element consisting of one or more synthetic materials for a reciprocating compressor, in particular a non-lubricated one, the sealing element is manufactured by an injection-moulding method, in whic...
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WO/1998/000660A1 |
A seal for hydraulic assemblies operating at high temperatures having adaptations (19, 20, 49, 50) for low pressure sealing and configured to move across the gap to be sealed at higher pressures with an angled base on a slope (23, 44) or...
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WO/1997/047870A1 |
The present invention pertains to mechanical engineering and relates to cylinder-piston assemblies mainly intended for use in two-stroke internal combustion engines. The cylindrical surface of the piston (5) is provided with recesses (9)...
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WO/1997/046799A1 |
The invention relates to a cylinder block for a multi-cylinder internal combustion engine with a multi-bearing crankshaft and a water jacket (4) surrounding the cylinders (3), the outer wall (6) of which, which is extended downwards, ext...
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WO/1997/039262A1 |
Piston rings, specifically for composite pistons for endothermic motors, compressors and pumps, comprising at least a spiral portion having a plurality of turns (3), of the type to be inserted in a recess defined in said piston. Accordin...
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WO/1997/039261A1 |
A piston for use on endothermic motors, compressors and pumps, featuring a configuration formed by several parts (2, 3) for the assembly of entire seal rings (10), as well as the eventual use of optimal materials for each one of its spec...
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WO/1997/032049A1 |
A cast iron piston ring which has excellent abrasion resistance and seizing resistance and does not abrade a low-hardness, flaky graphite cast iron liner having a hardness of HRB 85 to 95. Composition: cast iron comprising C: 3.0 to 3.5 ...
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WO/1997/030277A1 |
The present invention relates to a piston assembly with self-adjusting and self-lubricating device. This piston assembly has two piston rings, i.e. one is a combination compression ring, the other is a combination oil control ring. The c...
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WO/1997/022792A1 |
The present invention relates to an oil sealing ring, especially that used in piston of internal combustion engine or compressor. This oil sealing ring comprises a base ring (2) with a split. An elastic ring (3) is provided in the inner ...
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WO/1997/019280A1 |
The invention concerns a piston ring (10), in particular a piston ring for a reciprocating compressor, consisting of a first and a second annular element (10a, 10b) with a joint (10e, 10f), the rings (10a, 10b) being disposed concentrica...
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WO/1997/013991A1 |
A piston ring assembly includes a piston (12), and at least one piston ring (20) positioned within a piston groove (18). Stabilization and support of the piston (12) is provided by a support arrangement, including at least one support me...
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WO/1997/012139A1 |
This invention relates to piston compression ring assemblies, each of which consists of a main ring element and an auxiliary ring element. The assemblies can by themselves adjust the radial gaps between the assemblies and the liner, and ...
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WO/1997/011294A1 |
The invention relates to a device in piston rings (6) fitted on pistons of internal combustion engines. These rings have a top face (7), a bottom face (8), and a peripheral edge face (13) the latter face forming the wear face sliding aga...
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WO/1997/011295A1 |
A piston ring (7) for a piston in an internal combustion engine is inserted in one of several axially separated annular grooves (3) in the peripheral surface of the piston. Each annular groove has an upper and a lower groove face (4, 5) ...
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WO/1997/010424A1 |
This invention relates to a combination piston compression ring, which comprises a main compression ring element and at least one auxiliary compression ring element. The main compression ring element has a larger outer diameter than that...
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WO/1997/007330A1 |
Method and device for producing an abrasion resistant ring for a piston for an engine for forming a cooling path in a ring groove and adjacent to the ring groove by being cast in the vicinity of a head portion of a piston for an engine. ...
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WO/1997/003116A1 |
Polyimide compositions can be substantially improved by incorporating in the composition an inorganic, low hardness, thermally stable, sheet silicate, such as muscovite mica, talc, and kaolinite, which results in improved wear resistance...
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WO/1997/000397A1 |
The invention concerns a sealing ring (1) for sealing the piston rod of a piston compressor. The sealing ring (1) consists of three segments (1a, 1b, 1c), each of which has sections (2a, 2b) which extend in the circumferential direction ...
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WO/1997/000394A1 |
A sealing washer for creating a seal around a piston rod of circular cross-section comprises an annular sealing element (2) with a sector-shaped gap (3), and a closure element (1) comprising a main element (1e) which fits the gap (3) so ...
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WO/1997/000396A1 |
A sealing arrangement (12) for a piston rod of circular cross-section comprises a one-piece sealing ring (1) with a spacing (1a) and compensating clearance (S), and a cover ring (2) surrounding the sealing ring (1) around its circumferen...
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WO/1997/000395A1 |
A sealing ring intended in particular for a piston rod of circular cross-section is of height (H) in the axial direction and has a surface (2a) oriented towards a sliding surface (4). The surface (2a) is cylindrical over part (2b) of the...
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WO/1996/031717A2 |
A coil spring (30) including a plurality of coils connected to one another in series. Each of the coils has a front portion (34) and a rear portion (36). The front portion of at least one of the coils includes a first section (34m) dispo...
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WO/1996/021116A1 |
The invention relates to a sealing ring (1) made of plastic. The sealing ring is provided with a separating through-cut, the separating cut being configured as a step-shaped overlap in which the mutually overlapping ring ends lie against...
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WO/1996/016285A1 |
Piston ring seals (1) for internal combustion engines are known with a piston ring (2) in the end region of a piston (3) towards the combustion chamber; said piston ring is provided with a conical inner surface (9) which co-operates with...
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WO/1995/029271A1 |
A method of production of a slide member which comprises forming by ion plating a film mainly consisting of chronium and nitrogen in a thickness of at least 10 'mu'm on the surface of a foundation of a slide portion of a slide member obt...
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WO/1995/027132A1 |
A machine (1) comprising a body (2) with at least one cylinder (3) and at least one piston (4) in the cylinder bore, comprising at least one annular groove (4a) for receiving a ring seal (51, 52). The piston (4) includes two portions (6,...
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WO/1995/027133A1 |
A sealing system for the compression ring (5) of a piston (1) of an internal combustion engine comprises placing an elastomeric material seal ring (15) behind the compression ring (5) to provide sealing to improve compression ratio and p...
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WO/1995/023304A1 |
An object of the invention is to obtain a similar side sealing effect to what would be obtained when a means for cutting a ring corner angled portion for improvement of side sealing is used for a compression ring (1) having a special abu...
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WO/1995/023305A1 |
The invention concerns a method for the manufacture of oil scraper rings for the pistons in internal combustion engines. In accordance with the method, the ring (13) is first produced from cast iron in a mould. The material of the ring (...
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WO/1995/014184A1 |
Described is a reciprocating-piston engine with at least one cylinder delimited by a cylinder wall and at least one piston mounted so that it can reciprocate inside the cylinder. The piston has at least one groove running round it in whi...
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WO/1995/012755A1 |
A method of making a seal between a piston (14) and a cylinder bore (8) involves matching the external profile of a piston ring (10a) to the profile of the cylinder wall. The piston ring (10a) is fixed to the piston (14) to prevent rotat...
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WO/1995/012079A1 |
A width-reduced three-piece oil ring comprising an incomplete torus space expander (10) constituted by a shape steel material having a substantially H-shaped cross section and comprising in turn a projection (12) on the external circumfe...
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WO/1995/001523A1 |
The invention related to a sealing means which is used between two relatively sliping parts. In the prior arts there is some leakage gaps at the open part of the piston ring of the internal-combustion piston engines, which results in the...
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WO/1994/020744A1 |
Piston for an internal combustion engine, comprising a top upper portion (10), provided with a piston ring region (11) and a skirt lower portion (20), provided with a pair of hubs (21) for the articulating pin of the connecting rod. The ...
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WO/1994/012815A1 |
A piston top ring (4) is at a gap (9) allowing the ring to expand designed so that the gas in the combustion chamber of the cylinder is substantially prevented from flowing through the gap. The outer side (11) of the ring has at least tw...
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