| NITTAN VALVE CO., LTD. Patent applications |
| Patent application number | Title | Published |
|---|
| 20120090567 | PHASE VARIABLE DEVICE FOR ENGINE - OBJECT: To provide a compact phase varying device for an automobile engine, adapted to vary the relative phase angle between the crankshaft of the engine and the camshaft of the device over a wider range than that of conventional device. | 04-19-2012 |
| 20120073532 | PHASE VARYING DEVICE FOR ENGINE | 03-29-2012 |
| 20120042843 | HYDRAULIC LASH ADJUSTER FOR INTERNAL COMBUSTION ENGINE | 02-23-2012 |
| 20110297114 | PHASE VARYING APPARATUS FOR AUTOMOBILE ENGINE - PROBLEMS TO BE SOLVED | 12-08-2011 |
| 20110226202 | CAM SHAFT PHASE VARIABLE DEVICE IN ENGINE FOR AUTOMOBILE - A cam shaft phase variable device of an engine in which the attachment angle of a crankshaft and a cam shaft is maintained securely without being shifted by disturbance torque. The device has a drive body of revolution having a tubular section and a guide groove of reducing diameter and rotating relatively to the cam shaft and being driven by a crankshaft, a control body of revolution rotating relatively to the drive body through a rotary operating force imparting means and having the outer circumferential surface supported by the inner circumferential surface of the tubular section, an eccentric circular cam rotating synchronously, a movable member for displacing the guide groove, a cam guide intersecting the central axis perpendicularly and displaced by the eccentric circular cam, and an intermediate body of revolution displacing in the direction intersecting the cam guide perpendicularly while being supported on, and rotating integrally with, the camshaft. | 09-22-2011 |
| 20110192365 | CAM SHAFT PHASE VARIABLE DEVICE IN ENGINE FOR AUTOMOBILE - [Problems] To provide an inexpensive cam shaft phase variable device of an engine in which the displacement width of attachment angle between a crankshaft and a camshaft is large and operational sound is silent. | 08-11-2011 |
| 20110186000 | HOLLOW POPPET VALVE AND METHOD OF MANUFACTURING THE SAME - A hollow poppet valve has a stem portion provided at one end thereof with a tip portion; a cap portion; and a flared fillet portion formed between the stem portion and the cap portion, wherein at least a part of the stem portion that connects to the fillet portion is a thin hollow cylindrical member, and the cap member is welded to the fillet portion. The cap member is thin and has an arcuate axial cross section. It is laser-beam welded to the seat-abutment portion formed at the open end of the fillet portion such that a weld bead is formed along the inner periphery of the interface of the mated ends of the members. The weld bead adds an extra weld depth to the weld, which increases the modulus of section of the welded regions of the cap member and the fillet portion and enhances their welding strength. | 08-04-2011 |
| 20110162610 | HERMETICALLY SEALED LASH ADJUSTER - A sealed type lash adjuster ( | 07-07-2011 |
| 20110126791 | EXHAUST POPPET VALVE AND SOLUTION HEAT TREATMENT METHOD OF THE SAME - Object of the Invention The invention provides a forged exhaust poppet valve and a method of solution heat treating the same, in which only a predetermined portion of the valve is subjected to the solution heat treatment so as to provide the seat portion of the valve with satisfactory wear resistance, and a predetermined transitional neck-stem region with satisfactory high-temperature creep strength. | 06-02-2011 |
| 20110000450 | PHASE CHANGING DEVICE FOR AUTOMOBILE ENGINE - Objects The invention provides a phase changing device for automobile engine capable of preventing an unanticipated change in phase angle between the middle rotor and the camshaft of the device caused by a disturbing torque while preventing frictional wear of the inner circumferential walls of groove guides and avoiding generation of axial thrusts of links of the device. | 01-06-2011 |
| 20100326386 | ENGINE VALVE CONTROLLER - [Problems] To keep a determined phase angle without consuming power once the phase angle is determined. | 12-30-2010 |
| 20100313836 | PHASE VARIABLE DEVICE IN CAR ENGINE - The invention provides a phase variable device for use with a car engine, capable of preventing the phase angle of the camshaft from varying relative to the first circular rotational body even if the camshaft is subjected to the reaction of a valve spring, and capable of reducing the impulsive generated in the phase variable device and delivered to the engine. MEANS FOR ACHIEVING THE OBJECT | 12-16-2010 |
| 20100282194 | SEALED-TYPE LASH ADJUSTER - A lash adjuster | 11-11-2010 |
| 20100242886 | SEALED LASH ADJUSTER AND SEAL STRUCTURE BETWEEN FIRST AND SECOND PARTS - A sealed lash adjuster ( | 09-30-2010 |
| 20100050969 | MECHANICAL ADJUSTER - [Problem] To adjust increase/decrease in valve clearance automatically. | 03-04-2010 |
| 20100024754 | VALVE CONTROL APPARATUS FOR ENGINE - [OBJECT] After having determined a phase angle, the phase angle is maintained as the determined one without consuming electric power. [ACHIEVING MEANS] An intermediate member | 02-04-2010 |
| 20100000481 | PHASE VARYING APPARATUS FOR ENGINE - [Object] Heat generation is not caused by friction in a phase varying apparatus for use with a vehicle engine. | 01-07-2010 |
| 20090266314 | COOLANT-CONTAINING HOLLOW POPPET VALVE AND PROCESS FOR PRODUCING THE SAME - This invention provides a coolant-containing hollow poppet valve, which, in use, in consideration of a temperature distribution caused in each pert of the valve, causes a lowering in fatigue strength and creep strength in the valve at its site exposed to high temperatures falling within the tolerante of design standard, and, in consideration of required properties at the other valve sites, holds abrasion resistance and strength, and a process for producing the same. An improvement in heat resistance, abrasion resistance and strength depending upon properties required in each site can be realized by conducting a cold drawing step and an intermediate annealing step to bring the Vickers hardnesses of a cylindrical shaft portion ( | 10-29-2009 |
| 20090260590 | PHASE VARYING DEVICE OF ENGINE - [PROBLEMS] To prevent generation of heat by friction in a phase varying device of the engine of an automobile. | 10-22-2009 |
| 20090183704 | PHASE VARYING APPARATUS FOR ENGINE - [Object] To keep an air-gap between an electromagnetic clutch and a magnet within a predetermined range even if a camshaft vibrates in a radial direction. | 07-23-2009 |
| 20090090324 | Sealed Lash Adjuster and Method for Adjusting Amount of Liquid Sealed in Sealed Lash Adjuster - The liquid is sealed in the lash adjuster so that the volume “V1” of the gas, in the reservoir chamber when the lash adjuster is being produced and the plunger protrudes from the body, is equal to or more than 1.24 times as great as the sum of the volume “Vo1” of the liquid discharged from the high-pressure chamber when the plunger moves downward, and the increase “Vo2” in the volume of the liquid that expands, due to heat, when the temperature of the gas in the reservoir chamber is increased from the production temperature to the maximum use temperature, and the ratio of “V1” to “Vo1+Vo2” is equal to or higher than a ratio, which is derived based on the production temperature and the maximum use temperature, when the inner pressure of the lash adjuster increases by 500 kPa at maximum. | 04-09-2009 |
| 20090056659 | DIRECT-ACTING TYPE VALVE LIFTER FOR INTERNAL-COMBUSTION ENGINES - Objects: To provide a direct-acting type valve lifter that is simple in structure, involves a small number of components, and is capable of switching its valve lift between a high and a low lift. | 03-05-2009 |
