...that on Dec. 15, 1836, the Patent Office was completely destroyed by fire? Lost were some 7,000 models, 9,000 drawings, and 230 books plus all records of patent applications and grants.
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.
| Application No. | Application Title | Issue Date |
| 20120125298 | Two stroke opposed-piston engines with compression release for engine braking In a two-stroke opposed-piston engine, a ported cylinder with a pair of opposed pistons is equipped with a decompression port including a valve and a passage with an opening through the cylinder wall that is located between the cylinder's intake and exhaust ports. The d... | 05/24/2012 |
| 20100186723 | TWO-CYCLE, OPPOSED-PISTON INTERNAL COMBUSTION ENGINE In a two-stroke, opposed-piston internal combustion engine with optimized cooling and no engine block, opposed pistons protrude from the bore during at least a portion of an operating cycle of the engine and are cooled by application of a liquid coolant to their interio... | 07/29/2010 |
| 20090293820 | Two-cycle, opposed-piston internal combustion engine In a two-cycle, opposed-piston internal combustion engine, opposed pistons disposed in a cylinder are coupled to a pair of side-mounted crankshafts by connecting rods that are subject to substantially tensile forces acting between the pistons and the crankshafts. This g... | 12/03/2009 |
| 20080271715 | Internal combustion barrel engine A two-stroke barrel engine includes a power output shaft configured to rotate, an even number of cylinders encircling the power output shaft, wherein each cylinder includes opposing first and second power pistons configured to reciprocate within their respective power c... | 11/06/2008 |
| 20080223342 | Two-Stroke Engine with Variable Compression The invention consists of a two-stroke opposing cylinder engine that includes a length flushing system and two crankshafts (1, 3) and a novel type of phase setting mechanism which enables the compression ratio to be adjusted in operation. Two intermediate gear wh... | 09/18/2008 |
| 20070261677 | PAIRED-PISTON LINEAR ENGINE A linear internal combustion engine is disclosed having a cylinder defining an intake port proximate a first end thereof and an exhaust port proximate a second end thereof. First and second pistons insert into opposite ends of the cylinder. Each piston is coupled to an ... | 11/15/2007 |
| 20060059907 | Crankshaftless internal combustion engine The engine of the present invention provides the direct transfer of energy from the burning down of fuel in the engine cylinders into shaft power by forcing working liquid through guide devices and against an impulse turbine, thereby eliminating the need for supplementa... | 03/23/2006 |