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 |
| 8100094 | Radial impulse engine, pump, and compressor systems, and associated methods of operation Radial impulse engine, pump, and compressor systems are disclosed herein. In one embodiment of the invention, a radial impulse engine includes first and second movable V-members operably disposed between first and second end wall portions. The first V-member can hav... | 01/24/2012 |
| 8082891 | Conversion mechanism for a pivoting reciprocating engine The invention relates to a conversion mechanism for an internal combustion (11) engine. The conversion mechanism is operable to convert pivotally reciprocating motion of an output member (30) about a prime pivot axis (30.1) into rotational motio... | 12/27/2011 |
| 7866284 | Oscillating piston engine The invention relates to an oscillating piston engine comprising a housing that contains a first and at least a second piston, both of which can rotate about a fixed rotational axis in the housing and which when rotating about said axis execute counter-rotating disp... | 01/11/2011 |
| 7849822 | Reciprocating rotation type engine and power transferring device and hybrid system using the same A reciprocating rotary engine includes a torus-shaped chamber which is divided into two regions. Each divided region forms a sealed chamber. Each sealed chamber is divided by a piston attached to a shaft whereby four sealed chambers are formed. A power converter inc... | 12/14/2010 |
| 7770546 | Radial impulse engine, pump, and compressor systems, and associated methods of operation Radial impulse engine, pump, and compressor systems are disclosed herein. In one embodiment of the invention, an engine includes a first end wall portion spaced apart from a second end wall portion to at least partially define a combustion chamber therebetween. In t... | 08/10/2010 |
| 7753011 | Radial impulse engine, pump, and compressor systems, and associated methods of operation Radial impulse engine, pump, and compressor systems are disclosed herein. In one embodiment of the invention, an engine includes a first end wall portion spaced apart from a second end wall portion to at least partially define a combustion chamber therebetween. In t... | 07/13/2010 |
| 7707975 | Radial impulse engine, pump, and compressor systems, and associated methods of operation Radial impulse engine, pump, and compressor systems are disclosed herein. In one embodiment of the invention, a radial impulse engine includes first and second movable V-members operably disposed between first and second end wall portions. The first V-member can hav... | 05/04/2010 |
| 7658168 | Oscillating piston machine An oscillating piston machine comprises a housing in which a first and at least a second piston are arranged, which pistons can rotate together in the housing about a rotational axis which is fixed to the housing and which pistons, as they rotate about the rotationa... | 02/09/2010 |
| 7650860 | Engine with pivoting type piston Radial impulse engine, pump, and compressor systems are disclosed herein. In one embodiment of the invention, an engine includes a first end wall portion spaced apart from a second end wall portion to at least partially define a combustion chamber therebetween. In t... | 01/26/2010 |
| 7600490 | Internal combustion engine The invention concerns an internal-combustion engine, the engine comprising an engine housing having a first wall delimiting a first combustion chamber, a first connecting rod having a first piston and a second connecting rod having a second piston. The pistons also... | 10/13/2009 |
| 7404381 | Radial impulse engine, pump, and compressor systems, and associated methods of operation Radial impulse engine, pump, and compressor systems are disclosed herein. In one embodiment of the invention, a radial impulse engine includes first and second movable V-members operably disposed between first and second end wall portions. The first V-member can hav... | 07/29/2008 |
| 7392768 | Radial impulse engine, pump, and compressor systems, and associated methods of operation Radial impulse engine, pump, and compressor systems are disclosed herein. In one embodiment of the invention, an engine includes a first end wall portion spaced apart from a second end wall portion to at least partially define a combustion chamber therebetween. In t... | 07/01/2008 |
| 7328672 | Radial impulse engine, pump, and compressor systems, and associated methods of operation Radial impulse engine, pump, and compressor systems are disclosed herein. In one embodiment of the invention, an engine includes a first end wall portion spaced apart from a second end wall portion to at least partially define a combustion chamber therebetween. In t... | 02/12/2008 |
| 7325517 | Radial impulse engine, pump, and compressor systems, and associated methods of operation Radial impulse engine, pump, and compressor systems are disclosed herein. In one embodiment of the invention, an engine includes a first end wall portion spaced apart from a second end wall portion to at least partially define a combustion chamber therebetween. In t... | 02/05/2008 |
| 7305937 | Rotary toroidal machine with piston connecting mechanism A rotary machine includes a housing divided into a first stationary portion and a second rotational portion. The second rotational portion is supported for rotation with respect to the stationary portion about an axis of the housing. The first and second portions of... | 12/11/2007 |
| 7261066 | Piston for an internal combustion engine A pivoted piston for an internal combustion engine. The piston has a pivot pin and an arcuate first sealing surface (12) which describes a circumferential path about the pivot pin which forms a removable and replaceable skirt to the piston. The piston also in... | 08/28/2007 |
| 7258082 | Oscillating-piston machine An oscillating-piston machine comprises a housing, in which a first and at least a second piston are arranged, which pistons can together revolve in the housing about an axis of rotation that is fixed with respect to the housing, and which pistons, as they revolve a... | 08/21/2007 |
| 7255086 | Rotary internal combustion engine The invention can be used for transport means, sports cars and power plants. The inventive engine comprises a hollow toroidal working cylinder provided with a continuous circular slot embodied along the small diameter thereof, a nozzle or a spark plug and arc-wise e... | 08/14/2007 |
| 7255065 | Piston for an internal combustion engine A pivoted piston for an internal combustion engine. The piston has a pivot pin and an arcuate first sealing surface (12) which describes a circumferential path about the pivot pin which forms a removable and replaceable skirt to the piston. The piston also in... | 08/14/2007 |
| 7222601 | Rotary valveless internal combustion engine A rotatably alternating air or water cooled two-stroke internal combustion engine comprising a cylindrical casing, and a rotor comprising two radially extending vanes affixed to a shaft rotatably mounted within the casing upon two end plates. Two longitudinally exte... | 05/29/2007 |
| 7143723 | Piston for an internal combustion engine A pivoted piston for an internal combustion engine. The piston has a pivot pin and an arcuate first sealing surface (12) which describes a circumferential path about the pivot pin which forms a removable and replaceable skirt to the piston. The piston also in... | 12/05/2006 |
| 7108625 | System for generating a rotational movement of a shaft An apparatus for generating a rotational movement of a shaft with a first device for generating a rotational movement, driving a first drive path, and a second device for generating a rotational movement, driving a second drive path, at least one rotatable planet pi... | 09/19/2006 |
| 6962137 | Two-cycle rotary engines Two-cycle, single vane impeller, hinged hub rotary engines are simple embodiments of a new class of engines. The 2-cycle, hinged hub rotary engines have dependently rotating impellers with, interdigitated, alternating hub sections, a hinge like rotation joint. These... | 11/08/2005 |
| 6948473 | 4-cycle, rotary, electromagnetic, internal combustion engines Four-cycle rotary engines, with an even number of hinged-hub impeller vanes, utilize dependently rotating, joined, hinged-hub impellers, with interdigitated, alternating hub sections, on a shared, power output shaft, and electromagnetic fields, and timing of impelle... | 09/27/2005 |
| 6941900 | VAL rotary engine A rotary engine has a spherical enclosure serving as a combustion chamber, a first baffle inside the combustion chamber slideable along a groove formed in the spherical enclosure, and a second baffle disposed in the combustion chamber which is in sealing engagement ... | 09/13/2005 |
| 6928965 | Reciprocating piston engine comprising a rotative cylinder A reciprocating piston engine includes a rotor housing for transferring torque to an engine output drive; a contoured guide element in the rotor housing, having a closed, curvilinearly contoured shape, around which the rotor housing is rotatable; at least one compre... | 08/16/2005 |
| 6883488 | Rotary combustion engine A rotary combustion engine includes a driving eccentric ring arranged between a non-rotary outer casing and a non-rotary inner casing for rotating a power shaft situated inside the inner casing. In order to drive the eccentric ring, a combustion chamber arrangement ... | 04/26/2005 |
| 6880494 | Toroidal internal combustion engine Toroidal internal combustion engine comprising two concentric engine rings. Intake valves are assembled in two faces of one set of pistons and exhaust valves in two faces of the second set of pistons. The intake-valve pistons are fixedly attached to one of the engin... | 04/19/2005 |
| 6796285 | Internal combustion engine An internal combustion engine that has a torque wheel mounted for rotation within the central cavity defined by the housing and driving a crankshaft. The torque wheel has a plurality of arms in a spaced arrangement about the center of the torque wheel, thereby defin... | 09/28/2004 |
| 6691647 | Engine and drive system The engine comprises four open-ended curved cylinders (10) disposed in torroidal arrangement with respect to a central pivot point (11). Two piston arms (12) are pivoted about the point (11) and carry at their ends four pistons (13). Each piston (13) has ... | 02/17/2004 |
| 6668767 | Internal combustion engine rotatory (turbovolante) A rotary engine having at least two piston blades that may be actuated by either internal combustion or electromagnetic actuation. The combustion engine includes piston blades having a toothed moving pinion connected to each piston blade and a toothed fix... | 12/30/2003 |
| 6382143 | Balanced modular pendulum mechanism The present invention relates to a balanced pendulum mechanism that is useful in devices such as vacuum pumps, compressors, engines and blowers. The mechanism includes a pair of toroidal shaped cylinders originating from the centerline of a central axis, ... | 05/07/2002 |
| 6357397 | Axially controlled rotary energy converters for engines and pumps An axial bevel gear generated control motion is used to control an accelerating-decelerating vane motion in a cylindrical central axis main pressure chamber using a limited angle differential gear whose reversing gear is receiving an axial crank controlle... | 03/19/2002 |
| 6349679 | Circularly-curved piston engine This engine is substantially free from any vibration and noise, small in friction loss, improved in mechanical efficiency to a considerable extent, compact and lightweight, and applicable to a reciprocating piston engine. The engine comprises: curved cyli... | 02/26/2002 |
| 6321693 | Reciprocating rotary piston system and pressure pump and internal combustion engine using the same A reciprocating rotary piston system includes a cylinder (3) having an annular and hollow interior; a plurality of pistons (1A to 1D) of which first and second parties are formed to be disposed alternately on the same inner circumference of the cylinder, ... | 11/27/2001 |
| 6227152 | Internal combustion engine There is described an internal combustion engine comprising at least one cylinder and a crankcase (5), which together with the cylinder forms a common, circular cylindrical tubular body (1), and comprising an oscillating piston (7) rotatably mounted about... | 05/08/2001 |
| 6202600 | Oscillating two stroke internal combustion engine A two-stroke internal combustion engine includes an oscillating member, two stator walls, two engine casing members, two engine casing end plates, and at least two generating assemblies, magnetically coupled to the oscillating internal combustion engine a... | 03/20/2001 |
| 6186098 | Coaxial oscillating axisymmetric engine A coaxial oscillating axisymmetric engine is disclosed. The engine is provided with a rotor having a plurality of rotating blades, the blades being movable relative to a plurality of fixed blades of a stator in opposite directions while forming expansion ... | 02/13/2001 |
| 5794573 | Internal combustion engine An internal combustion engine has an annular engine chamber in which a set of pistons oscillate in synchronism. On their compression stroke, the pistons draw in a fresh charge into the chamber behind the piston. On the power stroke, that charge is compres... | 08/18/1998 |
| 5740765 | Rotary piston internal combustion engine A rotary piston internal combustion engine includes a housing defining a cylinder chamber in the form of a circular ring. An even number of pistons circulate in the piston chamber and are of a circular cross-section adapted to the cylinder chamber. Two pi... | 04/21/1998 |
