Famous Patents
3M employee and church chorister Art Fry needed something to temporarily mark pages in his hymnal. He was in luck because his colleague, Spencer Silver, accidentally developed a glue that was too weak for other purposes. After initially discouraging consumer response, Post-it Notes became a hit in 1979.
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| Number | Title | Issue Date |
| 7287523 | Thermally responsive regulator valve assembly A thermally responsive regulator valve assembly and exhaust gas recirculation system for an internal combustion engine having an intake manifold and an exhaust system is provided. The exhaust gas recirculation system includes an exhaust gas recirculation passage sel... | 10/30/2007 |
| 7177753 | Method for limiting the rotational speed of internal combustion engines A method for limiting the rotational speed in an internal combustion engine is provided. A detection device detects prevailing operating parameters. Based on the prevailing operating parameters, the control variables for the ignition, injection and throttle valve po... | 02/13/2007 |
| 7171942 | Protective engine speed control for a centrifugal clutch A device that controls the engine speed of an internal combustion engine of a hand-held power tool has a protective control unit. The engine has an ignition control unit for controlling the ignition timing relative to a crank angle of a crankshaft based on the crank... | 02/06/2007 |
| 7136742 | Engine kill-switch control circuit and method of operating the same A kill-switch control circuit for use with a light-duty combustion engine determines whether to execute a controlled shut down method or an immediate shut down method in response to kill-switch activation. The selection of a shut down method is made, at least in par... | 11/14/2006 |
| 6939266 | Shift interrupt system A shift enabling interrupt system that facilitates the shifting of gears of an outboard engine is disclosed. The system is activated by the signal from a sensor that determines if the user is attempting to shift the gears by detecting a lost motion in a shift linkag... | 09/06/2005 |
| 6792912 | Direct fuel injection combustion control system A combustion control system controls combustion in a direct fuel injection spark ignition engine that maintains a constant pressure in an accumulator when fuel is not being injected. The combustion control system controls combustion when fuel injection is resumed af... | 09/21/2004 |
| 6701889 | Method for deriving rotor angular orientation A method for determining the load angle of a three-phase current synchronous machine with the aid of position information of an internal combustion engine. The latter is furnished with an engine control device, in which operating parameters and the positi... | 03/09/2004 |
| 6688282 | Power-based idle speed control A system and method are disclosed for regulating engine idle speed by coordinating control of two actuators: a slow actuator and a fast actuator. The slow actuator is preferably a throttle valve and the fast actuator is preferably an ignition system affec... | 02/10/2004 |
| 6484692 | Ignition control system An ignition control system is provided, which includes: an engine speed detector (101) for calculating an engine speed according to an engine crank angle signal (100); a current supply start controller (102) for outputting a proper current supply start ti... | 11/26/2002 |
| 4957082 | Vehicle control system A vehicle control system embodying an engine driving the vehicle and, selectively, a power takeoff shaft. When the power takeoff shaft is being driven, a governor controls the speed of the engine. A device is provided for detecting the shaft speed and the... | 09/18/1990 |
| 4755790 | Float switch, a control apparatus and a warning apparatus of an engine A float switch and a control apparatus of an internal combustion engine are disclosed. This float switch comprises a float attached to a main body so as to be vertically swung around one end thereof, a magnetic material fixed to the float, and a contact a... | 07/05/1988 |
| 4573440 | Method for limiting the speed of an internal combustion engine in a vehicle and device for same In an externally ignited internal combustion engine for a vehicle with an electronic device for controlling the gas mixture composition and the point of ignition a leaner fuel-air mixture and the an earlier point of ignition is set before the maximum perm... | 03/04/1986 |
| 4553902 | Floating portable pump A floating portable pump is constructed of a float defining a well for containing water, a centrifugal pump supported on the float with its impeller shaft extending vertically and with its suction inlet submerged in water in the well, and an internal comb... | 11/19/1985 |
| 4492197 | Over-revolution preventing apparatus for internal combustion engines An electronic revolution rate limiting apparatus is described which generally comprises a transducer for generating a tachometer signal which is indicative of the revolution rate of the internal combustion engine, a circuit for producing a control signal ... | 01/08/1985 |
| 4436076 | Electronic speed control for capacitor discharge ignition system Electronic shut-off circuit is provided in a capacitor discharge ignition system for internal combustion engines to protect against excessive high-speed operation. The circuit includes an electronic switching component connected across the main capacitor ... | 03/13/1984 |
| 4385601 | System for limiting the speed of internal combustion engine having an ignition system utilizing a magneto generator Speed limiting in an ignition system utilizing a magneto generator is accomplished by increasing the damping of the half wave not utilized for ignition. This is accomplished by switching in additional resistance in parallel with the damping circuit resist... | 05/31/1983 |
| 4336778 | Safety limiter for engine speed A safety system for limiting the speed of a fuel powered engine, particularly an internal combustion engine of a vehicle or machine, preferably by controlling the engine ignition. The system is especially useful for vehicles such as snowmobiles, motorcycl... | 06/29/1982 |
| 4117813 | Internal combustion engine and method of operating it An internal combustion engine and means to operate the same to produce minimal quantities and concentrations of oxides of nitrogen (NOx), carbon monoxide (CO) and unburned hydrocarbons (HC). The engine is operated with a lean air/fuel mixture at both low ... | 10/03/1978 |
| 4062419 | Fuel-saving traveling system for an internal combustion engine-driven vehicle A fuel-saving traveling system for an internal combustion engine-driven vehicle has a one-way clutch in the drive train allowing the wheels to overrun the engine. A fuel-saving traveling system for an internal combustion engine-driven vehicle, wherein a v... | 12/13/1977 |
