Matches 1 - 39 out of 39
Match Document Document Title
7267344 Piston ring with a PVD coating  
A piston ring for an internal combustion engine is made of steel and has an outer contact surface that is nitrated and coated to no more than 70 μm with a protective coating comprising nitrides of...
7052019 Piston ring and method of manufacturing the same  
A manufacturing method of a piston ring is developed, wherein the method provides a countermeasure for wear of butt ends of the ion plating film coated piston ring and a countermeasure for breakage...
7052018 Piston ring having wear resistant composition  
The invention discloses a piston ring comprising a piston ring substrate. The piston ring substrate comprises at least 50 volume %, of at least one intermetallic alloy, based on the total volume of...
7024982 Combination of piston and piston ring  
A combination of piston and piston ring includes a piston having a piston ring groove in which at least the groove portion of the piston is made of steel, a piston ring made of cast iron and fitted...
6726216 Piston ring with oxide-nitride composite layer  
A piston ring for use in a cylinder of an internal combustion engine, which ring is nitride-hardened at least on the sliding surface between piston ring and cylinder wall. The nitride layer is...
6698763 Piston ring  
A piston ring having a stainless steel base material, the base material having an upper surface, a lower surface, an inner circumferential surface and an outer circumferential surface, the surfaces...
6631907 Nitride-plated piston ring for internal combustion engines  
According to an embodiment of the present invention a piston ring for internal combustion engines for use with a piston and a cylinder, is provided that has an external circumferential sliding...
6508473 Piston ring  
A piston ring is made of martensitic stainless steel. Except for the outer circumferential surface of the piston ring, a nitrided layer having a Vickers hardness of 700 or more is formed on the...
6494461 Sliding member  
An improved sliding member is provided that has a sliding surface and a deposition layer formed on the sliding surface utilizing an ion-plating method, wherein the deposition layer is composed...
6485027 Surface heat treatment of piston rings  
A piston ring for use in a piston of an internal combustion engine comprises a base material of a first hardness formed into a ring, and a secondary material of a second hardness formed by...
6325385 Piston ring  
A piston ring has a diamond-like carbon film formed in a thickness of 0.5 to 30 micrometers over an under film on the upper and lower surfaces. The under film is directly formed on the surfaces, or...
6270081 Combination of piston ring for use in internal combustion engine  
A piston ring combination including at least one compression ring and at least one oil ring. If a plurality of compression rings are provided, an outer peripheral surface of at least a top ring is...
6224687 Piston ring material and piston ring with excellent scuffing resistance and workability  
The invention provides a piston ring and piston ring material with excellent properties since not only it has excellent properties as a piston ring, but also excellent in drawability and rolling...
6213474 Piston ring and combination of compression rings  
According to an aspect of the present invention, a piston ring for use in internal combustion engines is provided that is made of matensite-based stainless steel material containing C of not less...
6209881 Cast-iron piston ring  
A cast-iron piston ring for a piston of an internal combustion engine includes a ring composed of cast-iron and having a circumferential surface; a nitrided layer covering the entire...
6189893 Piston ring  
A nitrated piston ring for the piston of an internal combustion engine. The piston ring has a circumferential indentation in its flank surface facing away from the combustion pressure. This...
6161837 Piston ring with hybrid face coating  
An improved piston ring is disclosed, together with a process form making the ring. An annular steel base body has a lower layer formed by electro-plating a peripheral surface of the body with...
6149162 Sliding member  
A gas nitrided layer is formed over the entire surface of a piston ring. A physical vapor deposition film of CrN is formed over the gas nitrided layer at the outer circumferential surface. The...
6098988 Mechanism for forming a seal around the shaft of a liquid pump  
A mechanism for forming a liquid-tight seal around the rotary shaft of a liquid pump having a stationary ring attached to the casing of the pump and a rotating ring attached to the rotary shaft and...
6060182 Hard coating material, sliding member covered with hard coating material and manufacturing method thereof  
A hard film is covered on the outer circumferential surface of a piston ring by means of an arc ion plating. The hard film has a mixture of crystal structure of CrN and crystal structure of Mo 2 N...
6054225 Composite chromium plating film and sliding member covered thereof  
A piston ring is formed with a nitrided layer over all surfaces and formed with a composite chromium plating film over the nitrided layer in the outer circumferential surface. The composite...
5901963 Gas nitrided taper faced keystone piston ring incorporating a sealing land and orientation groove  
A piston ring having a keystone shape and an orientation feature on one of its surfaces for ensuring proper orientation of the ring during installation. The piston ring preferably has an outer...
5820131 Piston ring having wear coating consisting of Cr.sub.2 N or a mixture of Cr.sub.2 N and Cr  
A Cr 2 N film or a mixed Cr 2 N and Cr film formed by physical vapor deposition on the outer circumferential surface of a piston ring which is in contact with the inner circumferential surface of...
5718437 Combined oil ring with spacer/expander having Cr.sub.2 N coating thereon  
A combined oil ring is comprised of paired upper and lower side rails, and a spacer expander. The side rails are made of martensitic stainless steel and are subjected to gas nitriding. The spacer...
5605741 Hybrid face coating for piston ring  
A base body of a piston ring has an electroplated chrome or gas nitrided sub-layer formed on its outer peripheral face. The sub-layer is face-lapped, roughened through grit blasting, and then oil...
5601293 Sliding member with hard ternery film  
A hard film is formed on the outer circumferential surface of a piston ring by means of a physical vapor deposition process. The hard film is a ternary film comprising molybdenum, chromium, and 4...
5405154 Piston ring  
A compression ring as a piston ring adapted to by received in an annular groove formed in a piston disposed in a cylinder assembly of an internal combustion engine includes an annular ring base...
5316321 Nonferrous piston ring with hard surface treatment layer  
A piston ring is made of a titanium alloy, at least an outer peripheral surface and upper and lower surfaces thereof are formed with a nitrogen diffused layer, and at least an outer peripheral...
5304262 Two-piece oil ring for use in internal combustion engine, steel wire of modified cross-section for use as material of the oil ring and method of producing the steel wire  
A two-piece oil ring, for use in an internal combustion engine, with the oil ring being made from a martensitic stainless steel material having high consisting essentially of more than 0.8 wt % but...
5295696 Combined oil ring  
A combined oil ring is comprised of a steel oil ring having a generally I-shaped section consisting of upper and lower rails and a web connecting the both rails and a coil expander for forcing the...
5154433 Piston ring  
A piston ring comprises a martensitic stainless steel ring having a nitrided layer formed in the surface portion thereof, and a titanium nitride film coated on the outer sliding surface of the ring...
5104132 Piston ring having nitriding layer and composite Ni-B plating layer  
A piston ring for use in an internal combustion engine. The piston ring includes a base body, a nitriding layer formed at an outer peripheral surface portion of the base body, and a composite Ni-B...
4979757 Oil ring assembly  
A compound steel oil ring assembly has nitrided side rails and a spacer expander. The opposing end portions of each side rail are treated to prevent formation of a nitride layer solely at these...
4579355 Nitrided steel piston ring with oxide film  
A steel piston ring comprises a base material of stainless steel, a nitrided layer covering at least the edge of the ring adapted to slide along a cylinder wall of an internal combustion engine,...
4570946 Nitrided piston ring with outer layer on surface  
A piston ring provided with a nitriding layer at entire surfaces of the piston ring body to form a compound layer and a diffusion layer, so that a compound layer is formed over the diffusion layer....
4531985 Surface treatment of metal rings  
A metal ring of generally rectangular cross-section has its radially outer surface and its side surfaces treated by being stacked with its sides in contact with other rings in a chamber. Air is...
4522412 Oil ring with coil expander  
A piston ring comprising a generally I shaped oil-scraping oil ring which has upper and lower side rails and a considerably thin web connecting the side rails, and which has an outer peripheral...
4407515 Combined oil ring  
A combined oil ring comprising a steel spacer expander and two steel side rails is described, which has excellent wear resistance and can be used in, for example, an internal combustion engine. The...
3947046 Oil seal ring for internal combustion engine  
An oil seal ring is obtained which can maintain its oil scraping performance at a satisfactory level despite the frictional wear it undergoes. It is formed with a tapered sliding surface having a...
Matches 1 - 39 out of 39