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Class 123/73F - Stepped piston


Subclass of Class 123 - Internal-combustion engines
No. of patents: 9
Last issue date: 02/19/2008


NumberTitleIssue Date
7331315Two-stroke engine with fuel injection
A two-stroke internal combustion engine is provided with a fuel injector. The two-stroke internal combustion engine may have at least one transfer passage, an air channel, and a fuel injector. The transfer passage is between a crankcase and a combustion chamber of t...
02/19/2008
6817323Internal combustion engine
The present invention discloses a crankcase scavenging internal combustion engine (1) having a transfer passage (8) interconnecting the crankcase (3) and the cylinder (2) via a conventional transfer port (20). An air supply tube (
11/16/2004
6145488Reduced volume scavenging system for two cycle engines
A reduced volume scavenging system for a two cycle engine embodying a duplex cylinder having an upper cylinder bore and a reduced-diameter lower cylinder bore. The lower bore communicates with a crankcase that houses a crankshaft, connecting rod(s) and en...
11/14/2000
5797359Stepped piston two-cycle internal combustion engine
The engine has at least first and second stepped cylinders with the pistons therein operated from the same crankshaft at different portions of the engine cycle. The pistons in the cylinders to define a combustion space and first and second air compression...
08/25/1998
4630591Stratified charge internal combustion engines
A stratified-charge two-stroke internal combustion engine of the kind in which a rich mixture of fuel and air reaches each cylinder from an auxiliary transfer passage, and further air from a main transfer passage. The fuel-supply device for each cylinder ...
12/23/1986
4522163Stepped piston and stepped piston engine
A stepped piston for an engine of the kind having one or more cylinders, the or each cylinder containing a stepped piston having a pumping part of larger diameter, and a working part of smaller diameter, the working part of the piston being slidable in, a...
06/11/1985
4481909Two-cycle internal combustion engine
A crankchamber precompression type two-cycle internal combustion engine including at least one cylinder assembly, each cylinder assembly including a stepped cylinder constituted by a minor diameter cylinder portion and a major diameter cylinder portion, a...
11/13/1984
4138971Crankchamber precompression type two-cycle internal combustion engines
Twin cylinder two cycle engine including a pair of stepped cylinders and a pair of stepped pistons slidable in said cylinders defining annular spaces of variable volume in said cylinders. The pistons are interconnected each other with 180° phase differen...
02/13/1979
4068629Stepped piston two stroke engines
A stepped piston two cycle engine, of the type including at least one set of two cylinders each such cylinder having a working part of smaller diameter and a pumping part of larger diameter, at least the air for each charge required by the working part of...
01/17/1978
 
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