Did You Know...
...that when IBM conducted a market study of Chester Carlson's invention in 1959, the company concluded that it would take only 5000 units of his new product to saturate the market? IBM therefore declined to be part of the new product introduction. Too bad for IBM. Carlson's invention was the xerography process, and his new product was the beginning of the Xerox Corporation. It is estimated that every day, worldwide, 3,000,000,000 copies are made!!
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 |
| 7584726 | Two-stroke opposite radial rotary-piston engine A two-stroke opposite rotary-piston engine comprises a cylinder block including a sleeve and two pistons slidely disposed therein, oppositely movable forming a common combustion chamber and a first gap with sleeve's sidewalls, a rotor having a surface formed by an e... | 09/08/2009 |
| 6234120 | Two-stroke engine The two-stroke internal combustion engine has a cylinder, a piston, a connecting rod connected between a crankshaft and the piston. The engine has an inlet defined at a crankcase for conveying a fuel mixture from a carburetor. The engine includes a cylind... | 05/22/2001 |
| 5996538 | Two-cycle internal combustion engine and method of operation Two pairs of double-acting pistons are disposed in a hollow toroidal structure. Each pair of the double-acting pistons is operatively connected together and moves in the same rotational direction. Each of the pistons has two heads which cooperate with a h... | 12/07/1999 |
| 5551383 | Internal combustion engine utilizing pistons An internal combustion engine having a cylindrical outer case(s) defining a base compression cylinder(s) with an inner cylindrical cylinder(s) defining power cylinder(s) circumferentially spaced in the engine and each housing opposing intake and exhaust p... | 09/03/1996 |
| 5213067 | Internal combustion engine An internal combustion engine is provided having opposed pistons operating in axially spaced relation within common power cylinders. Opposed heads of the pistons define a space within which occurs a cycle of compression, ignition, combustion, and expansio... | 05/25/1993 |
| 5029559 | Opposed piston engine having fuel inlet through rod controlled piston port An opposed piston two cycle internal combustion engine. The movement of the opposed pistons is transmitted to two cranks, the two cranks are interlocked together by gears. The gears maintain synchronized movement of the cranks and further act as an air pu... | 07/09/1991 |
| 4732115 | Interval spark ignition combustion engine A two stroke spark ignition engine requiring a minimum of one pair of cylinders is constructable in multiple cylinder pairs. Each cylinder contains two oppositely working pistons. Four pistons drive, without rocking couples, opposite sides of a single cra... | 03/22/1988 |
| 4606303 | Reciprocating piston internal combustion engine In a reciprocating piston internal combustion engine, an upwardly arcuately shaped combustion space is formed in the cylinder head, which contains suspended valves arranged V-shaped. The valves are moved as close as possible to the combustion space bounda... | 08/19/1986 |
| 4566408 | Internal combustion engine The present disclosure relates to internal combustion engines of the kind comprising two working cylinders arranged in vertical side-by-side parallel relationship, there being two oppositely working pistons in each cylinder, and the movement of the four p... | 01/28/1986 |
| 4543917 | Internal combustion engine A two stroke diesel engine requiring a minimum of one pair of cylinders is constructable in multiple cylinder pairs. Each cylinder contains two oppositely working pistons. Four pistons drive, without rocking couples, opposite sides of a single crankshaft ... | 10/01/1985 |
| 4520765 | Internal combustion engine and operating cycle therefor An engine and method in accordance with this invention includes a plurality of parallel cylinders equally spaced from a longitudinally extending engine axis with a pair of opposed pistons in each cylinder for controlled reciprocation therein. Respective r... | 06/04/1985 |
| 4480597 | Two-stroke cycle gasoline engine A two-stroke cycle gasoline engine, comprising a power cylinder-piston assembly having a scavenging port configuration including a first scavenging port configuration first uncovered by the power piston as it moves along the power cylinder from its top de... | 11/06/1984 |
| 4403577 | Free piston internal combustion engines A free piston internal combustion engine has at least a motor cylinder formed with intake and exhaust ports and a driving piston reciprocating in said cylinder and cooperating with the exhaust ports. Air delivery means are formed in the cylinder for suppl... | 09/13/1983 |
| 4357916 | Two-stroke cycle gasoline engine A two-stroke cycle gasoline engine including at least one two-stroke cycle power cylinder-piston assembly incorporating uniflow scavenging and two horizontally opposed pistons and two crankcases to perform crankcase compression, and at least one scavengin... | 11/09/1982 |
| 4312305 | Two-stroke cycle gasoline engine A two-stroke cycle gasoline engine including at least one two-stroke cycle uniflow scavenging power cylinder-piston assembly which has a scavenging port configuration which consists of first, second, and third scavenging port configurations which are succ... | 01/26/1982 |
| 4289094 | Two-stroke cycle gasoline engine A two-stroke cycle gasoline engine having a first scavenging port which is supplied with fuel-air mixture through a mixture passage, and a second scavenging port which is supplied with air, wherein supply of fuel-air mixture through the mixture passage is... | 09/15/1981 |
| 4258669 | Two-stroke cycle gasoline engine A two-stroke cycle gasoline engine including at least one two-stroke cycle power cylinder - piston assembly incorporating uniflow scavenging and two horizontally opposed pistons, and a scavenging structure which gives zero or a relatively weak swirl to th... | 03/31/1981 |
| 4237831 | Two-cycle engine A two-cycle engine including first set of passages formed outside a cylinder connecting a first crank case with scavenging ports for feeding air-fuel mixtures from the first crank case to the cylinder, second set of passages formed outside the cylinder co... | 12/09/1980 |
| 4216747 | Uniflow, double-opposed piston type two-cycle internal combustion engine In a uniflow, double-opposed piston type two-cycle internal combustion engine of the type having first and second crank chambers attached to the ends of a cylinder, first and second pistons disposed in the first and second crank chambers, respectively, an... | 08/12/1980 |
| 4071000 | Double crankshaft valved two cycle engine A two cycle engine is disclosed wherein a pair of pistons reciprocate within a common cylinder to operate a pair of crankshafts mounted at opposite ends of said cylinder. Intake mixtures for the cylinder are crankcase-pumped, and both the intake and outpu... | 01/31/1978 |
| 3970057 | Internal combustion engine An internal combustion engine comprises a housing having two cylinders formed therein, a combustion chamber between the two cylinders, and two crankcases. The cylinders are angularly disposed with respect to one another in a V shape with the combustion ch... | 07/20/1976 |
