Did You Know...
...that while attempting to develop a super strong glue, 3M employee Spencer Silver accidentally developed a glue that was so weak it would barely hold two pieces of paper together? However, his colleague Art Fry needed the glue. Fry sang with his church choir and marked the pages of his hymnal with small scraps of paper that often fell out. He used Silver's glue to hold the papers in place. Today we call this invention Post-it Notes.
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| Number | Title | Issue Date |
| 6970781 | Compression ratio mode selection logic for an internal combustion engine having discrete variable compression ratio control mechanism A method and system for operating an internal combustion engine. The internal combustion engine is operable in a plurality of compression ratio operating modes. The method includes determining a relationship between a base engine threshold load where the high compre... | 11/29/2005 |
| 6899065 | Radial-valve gear apparatus for barrel engine A barrel engine has an elongated power shaft defining a longitudinal axis. A plurality of cylinders surround the longitudinal axis, with each having a closed end and an open end. An intake system introduces a combustible mixture of air and fuel into each of the cyli... | 05/31/2005 |
| 5890462 | Tangential driven rotary engine A tangential driven rotary engine (10) comprising an engine block (12) having a plurality of cylinder combustion chambers (14) radially positioned therein. A plurality of pistons (16) are each movable and disposed within each cylinder combustion chamber (... | 04/06/1999 |
| 5704332 | Rotary engine An internal combustion engine in which linear, reciprocating motion of pistons is translated to rotary motion of a cylinder. In another embodiment, the pistons are in the form of V-shaped blades which bear against a camming surface to rotate an outer hous... | 01/06/1998 |
| 5566578 | Power recieving torque translating output device A power receiving, torque translating, output device receives reciprocating power from a plurality of external power producers. The received reciprocating power is timed and controlled by a cam affixed inside a rotor rotating about a stationary central sh... | 10/22/1996 |
| 5228415 | Engines featuring modified dwell Novel reciprocating engines which feature conversion units each formed of an expansion cylinder, a compression cylinder and a passageway connecting the two. Pistons in the cylinders are preferably connected via a four-bar or other linkage to the crank so ... | 07/20/1993 |
| 4592309 | Internal combustion engine The present invention relates to an improved internal combustion engine which separates the compression stroke from the power generator. In particular, the invention utilizes a cam profiled power shaft of a shape to accomodate the new movement of the powe... | 06/03/1986 |
| 4553508 | Internal combustion engine An internal combustion engine comprises a plurality of cylinders disposed in circular array, each having a piston slidably received therewithin to define a combustion chamber. Connecting rods affixed to the pistons are provided with cam follower means for... | 11/19/1985 |
| 4510894 | Cam operated engine A cam operated internal combustion engine of piston type positive displacement variety, having novel piston-to-cam connecting means. The pistons are cam operated to optimize the aspiration, combustion and expansion process. Executed in axial and radial ca... | 04/16/1985 |
| 4185508 | Motion change transmission A motion change transmission includes a rotor rotationally supported by and/or within a framing assemblage or housing. The face of the rotor is provided with alternating, axially and circumferentially extending hills and valleys. At least one rod is dispo... | 01/29/1980 |
| 4149498 | Internal combustion engine An internal combustion engine is provided that has a stationary cylinder block in which cylinders contain reciprocating pistons that are sequentially actuated to impart torque to a revolving rotor. A unique rotor is provided that includes a cam surface th... | 04/17/1979 |
| 4129101 | Internal combustion engine An internal combustion engine comprising an engine frame having a drive shaft rotatably mounted therein and extending outwardly therefrom. A pair of cylinder sleeves are mounted on the engine frame and have their inner ends positioned within the interior ... | 12/12/1978 |
| 4127096 | Internal combustion engine An internal combustion engine comprising an engine frame having a drive shaft rotatably mounted therein and extending outwardly therefrom. A pair of cylinder sleeves are mounted on the engine frame and have their inner ends positioned within the interior ... | 11/28/1978 |
| 4084555 | Radial engine A radial engine having an engine casing supporting for rotation therein a central drive shaft and having mounted thereupon a rotator drivingly afixed to said shaft, at least two combustion apertures provided along the circumferential edge of the rotator a... | 04/18/1978 |
| 4023542 | Load responsive variable stroke internal combustion engine An internal combustion four cycle engine is provided with a plurality of stationarily mounted cylinders radially arranged in equal spaced apart relationship within the inner circumference of a rotatably mounted drive drum and in parallel relationship with... | 05/17/1977 |
| 3943895 | Barrel type internal combustion engine An axial cylinder internal combustion engine having a cylindrical cam is provided with special cam roller followers subjected to oil under pressure to keep them in close operating contact with the radial cam surfaces. Oil pressure is also used to maintain... | 03/16/1976 |
