| TEIKOKU PISTON RING CO., LTD Patent applications |
| Patent application number | Title | Published |
|---|
| 20120006121 | PISTON RING TENSION MEASUREMENT APPARATUS - To provide a piston ring tension measurement apparatus which can stably measure a piston ring for suitable tension, the piston ring tension measurement apparatus of the present invention comprises: a table | 01-12-2012 |
| 20110232478 | CYLINDER LINER - The present invention provides a cylinder liner excellent in adhesion and heat conductivity with a cylinder block. The cylinder liner 1 of the present invention is formed from cast iron or steel. The cylinder liner 1 is formed with a thermal sprayed coated film 6 at its outer circumferential surface 3 and top surface 4. As the thermal sprayed material, Al, an Al alloy, Fe, an Fe alloy, Zn, a Zn alloy, Cu, a Cu alloy, etc. is used. The cylinder liner 1 is cast around a cylinder block formed from an aluminum alloy or other light alloy, by insert casting, at its outer circumferential surface 3, top surface 4, and bottom surface 5. The cylinder liner 1 is chamfered at the connecting edges of its top surface 4 and inner circumferential surface 7. The thermal sprayed coated film 6 is preferably formed at the top surface 4 part to extend over the chamfering part. | 09-29-2011 |
| 20110221141 | COMBINATION OIL RING - A combination oil ring prevented from freeze up of the side rails and spacer expander, that is, a combination oil ring of the present invention provided with a top and bottom pair of side rails | 09-15-2011 |
| 20100162987 | PISTON DEVICE FOR INTERNAL COMBUSTION ENGINES - A piston device for internal combustion engines includes a first compression ring and a second compression ring in an outer circumference of a piston, wherein the second compression ring includes a notch extending from the inner circumference to the outer circumference on a lower surface of at least one of a pair of ends of the ring, and a gap between the ring ends at the notch on the second compression ring is larger than a gap between the ring ends of the first compression ring, and a gap between the ring ends at the section other than the notch on the second compression ring is the same or smaller than the gap between the ring ends of the first compression ring, and the second compression ring contains an outer circumferential surface comprised of a tapered surface decreasing the ring radial thickness towards the upper side, and an axial parallel surface formed below the tapered surface. Instead of the axial parallel surface, the second compression ring may utilize a tapered surface with a taper angle smaller than the taper angle of the above tapered surface; or may utilize a tapered surface decreasing the ring radial thickness towards the lower side. | 07-01-2010 |
| 20090273142 | COMBINED OIL RING - A combined oil ring includes an oil ring having upper and lower rails formed integrally at an outer circumferential side of the oil ring to slide on a cylinder wall; a coil expander installed at an inner circumferential side of the oil ring to force the oil ring radially outwards; and a side rail installed at an upper side of the oil ring and having no torsion along an axial direction of the oil ring. | 11-05-2009 |
| 20090272261 | INSERT CASTING STRUCTURE - An insert casting structure includes a cylinder liner made of cast iron and inserted within aluminum alloy through insert casting and having a plurality of projections on an outer circumferential surface of the cylinder liner, wherein when the thickness of a cast iron portion to the base of the projection is set as L1, and the thickness of an integrated piece made up of the cast iron portion and an aluminum alloy portion is set as L2, the thermal conductivity is 35 to 80 W/mK when measured under the condition of L1/L2=0.45. | 11-05-2009 |
| 20090020006 | COMBINATION OF A PISTON AND A PISTON RING | 01-22-2009 |
