| Patent Number |
Title Of Patent |
Date Issued |
| 4728582 |
Ceramic sliding element with aluminum oxide and silicon nitride members |
March 1, 1988 |
| In a sliding element having first and second members in friction and/or sealing contact, the first member s made by sintering a ceramic mixture based on silicon nitride, the content of the silicon nitride phase and/or of the silicon nitride mixed crystal phase being at least 60 weigh |
| 4716869 |
Valve guide for an internal combustion engine |
January 5, 1988 |
| A tubularly formed valve guide (1) with a bore for a metal valve shank (2) for use in an internal combustion engine comprising a sintered body of a partially stabilized zirconium oxide having a porosity of less than 3%. Even under extreme stress, e.g., in an outlet valve of a high-power |
| 4595663 |
Sintered ceramic shaped article wholly or predominantly of eutectic microstructure constituents |
June 17, 1986 |
| Ceramic shaped articles are disclosed which are formed of dense, non-metallic, mechanically resistant materials and contain eutectic constituents consisting of zirconium oxide, hafnium oxide and at least one other high-melting oxide and mixtures thereof. The composition exhibits exce |
| 4535683 |
Piston with a member made of partially stabilized zirconium oxide |
August 20, 1985 |
| A piston arrangement with a metal shaft, a piston head that is attached to it with a shrink ring, and a member made of partially stabilized zirconium ozide. The top which demarcates the combustion chamber, of the piston head, consists entirely of the member made of partially stabilized |
| 4526824 |
Thermal insulation lining of ceramic material for a hot gas duct enveloped in metal |
July 2, 1985 |
| A thermal insulation lining (1) in the exhaust duct (4) of a cylinder head (5) consists of a sintered compact (2) of ceramic material having an envelope containing or consisting of inorganic fibers. |
| 4524732 |
Cylinder head of a piston engine |
June 25, 1985 |
| In a cylinder head (1) of a piston engine, a thermal insulation component having openings for the accommodation of valve seats, spark plugs, and injection nozzles consists of a circular aluminum titanate plate (2) which is shrink-fitted into a planar circular ring of zirconium oxide (12) |
| 4522415 |
Piston ring for an internal combustion engine |
June 11, 1985 |
| A piston ring (1) made of ceramic materials for an internal combustion engine comprising a body made by sintering of partially stabilized zirconium oxide (PSZ) which has a porosity <3% and, rolling surface (4) of the piston ring having a centerline average roughness R.sub.a of 0.03 to |
| 4522171 |
Pre-combustion or turbulence chamber for internal combustion engines |
June 11, 1985 |
| In a pre-combustion or turbulence chamber for an internal combustion engine, an inner molded body, defining an inner chamber, is formed of a material having a thermal conductivity of at least 12 W/(m.multidot.K). An outer body is secured to the outer surface of the inner body by shrinkin |
| 4519359 |
Mullite plate |
May 28, 1985 |
| In a cylinder head of a piston engine, the surface of the cylinder head facing the combustion chamber is covered by a plate having openings for valves, spark plugs or injection nozzles. The plate consists of mullite containing 2 to 30% by volume of zirconium oxide and/or hafnium oxide |
| 4484981 |
Papermaking dewatering apparatus having wire support means with cooling water feed means |
November 27, 1984 |
| Apparatus for processing paper wherein a pair of endless curved wire devices operate to pass therebetween a sheet material to be treated for a dewatering operation or the like. A support structure in the form of individual support segments made from sintered oxide ceramics are arranged |
| 4420142 |
Machine component of oxide ceramic material |
December 13, 1983 |
| A machine component is disclosed composed of 3.0 to 25 weight percent of zirconium oxide and/or hafnium oxide which are present in the interior of the machine component at room temperature predominantly in the metastable tetragonal modification and at the surface of the machine component |
