Quotables
"That’s an amazing invention, but who would ever want to use one of them?"
President Rutherford B. Hayes ; Said in 1876, after Alexander Graham Bell demonstrated the telephone to him at the White House
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7228836 | Spring retainer and method for manufacturing the same A spring retainer formed from a titanium alloy and comprising a cylinder and a brim formed integrally with the cylinder is disclosed. The brim has on a top thereof a slope formed such that a thickness of the brim decreases radially outwardly. ... | 06/12/2007 |
| 7140337 | Valve gear mechanism In a valve gear mechanism of an internal combustion engine, there is provided a valve opening and closing a combustion chamber, a spring device which generates a force pressing the valve toward a valve seat, a drive mechanism driving the valve in an opening directio... | 11/28/2006 |
| 6966539 | Valve spring retainer A lightweight valve spring retainer with a wear resistant spring seat or seats is provided. The spring seats may be defined in part by a tungsten carbide layer. ... | 11/22/2005 |
| 5884596 | Valve spring in an internal combustion engine A valve spring is used in a valve operating mechanism for moving a poppet valve up and down in an internal combustion engine of an automobile. The terminal end of the uppermost portion of the valve spring extends in a tangential direction to go away from ... | 03/23/1999 |
| 5443242 | Conformed valve spring wear plate The valve spring wear plate is proposed for use in a locomotive engine cylinder head to protect the areas of the cylinder head each acting as a valve spring seat from becoming grooved by the action of the spring thereagainst. The wear plate accommodates o... | 08/22/1995 |
| 5138990 | In-line cylinder head for internal combustion engine An improved cast cylinder head for a high performance internal combustion engine is provided by an especially configured quench surface from which a contoured combustion chamber extends having a metal mass buildup shrouding the exhaust gases through the e... | 08/18/1992 |
| 5072950 | Valve stem assembly A valve stem seal assembly comprises a valve stem seal having an external flange and a sealing lip, a washer having a tapered axial bore therein, a spring extending between the external flange of the seal and the washer, and a member engaging the seal and... | 12/17/1991 |
| 5048476 | Two-cycle internal combustion engine A two-cycle, internal combustion engine utilizing a stepper motor to vary tension on an air intake valve. An air pump forces air through the valve but is opposed by forces due to a spring on the valve and pressure in the cylinder. By varying the compressi... | 09/17/1991 |
| 4050422 | Apparatus for supplying rich air/fuel mixture in an internal combustion engine An auxiliary combustion chamber at least partially embedded in the cylinder head of an internal combustion engine adjacent the intake valve of a main combustion chamber and having a spark plug positioned in the auxiliary chamber and unvalved inlet and out... | 09/27/1977 |
