Internal-combustion engines – Oscillating piston – Toroidal cylinder
Reexamination Certificate
2000-05-01
2001-11-27
Denion, Thomas (Department: 3748)
Internal-combustion engines
Oscillating piston
Toroidal cylinder
C123S211000, C418S036000, C418S037000, C418S035000
Reexamination Certificate
active
06321693
ABSTRACT:
TECHINCAL FIELD
The present invention generally relates to a reciprocating rotary piston system and a pressure pump and an internal combustion engine using the same. More particularly, it relates to a reciprocating rotary piston system which has a plurality of pistons alternately disposed on the same inner circumference of its cylinder and two adjacent parties of those pistons forward rotating and reversely rotating at the same speed and in the opposite direction with respect to each other in a way that their resultant force becomes zero, and reduces vibration, noise, and eccentric abrasion during operation, thus assuring a small-sized and light main body, long life of a machine, and high performance. It further relates to an internal combustion engine, a hydraulic/pneuatic pump, and a vacuum pump using the same.
BACKGROUND ART
Various internal combustion engines, pumps, vacuum pumps, etc. have used rectilinear reciprocating piston system for compressing or conveying a fluid. This rectilinear reciprocating piston system that moves two-way cannot evade one-way force or reaction force when changing the direction of movement. Even if these forces are offset by disposing a number of pistons in a row, there is a limit to offset against the piston forces or their reaction force applied to its main body and crank shaft at individual position.
Accordingly, the conventional rectilinear reciprocating piston system causes vibration and noise due to the rectilinear reciprocating motion of the pistons. In addition, as the rectilinear reciprocating motion of the pistons used in the internal combustion engine's cylinder is changed into a rotating motion through the crank shaft, a resultant force of the forces acting on the lower portions of the pistons each connected to the crank shaft is not zero with respect to the rectilinear reciprocating motion axis,of the pistons, which causes the cylinder to be eccentrically abraded and shortens the life of the whole machine system. A large and rigid component is used in order to assure the safety of the machine body, which makes the machine heavy.
DISCLOSURE OF THE INVENTION
Accordingly, the present invention is directed to an improved piston system that substantially obviates one or more of the problems due to limitations and disadvantages of the conventional art.
It is an objective of the present invention to provide a reciprocating rotary piston system which has a plurality of pistons alternately disposed on the same inner circumference of its cylinder, two adjacent parties of those pistons forward rotating and reversely rotating at the same speed and in the opposite direction with respect to each other in a way that their resultant force becomes zero, and reduces vibration, noise, and eccentric abrasion during operation, thus assuring a small-sized and light main body, long life of a machine, and high performance.
It is another objective of the present invention to provide various internal combustion engines, hydraulic and pneumatic pumps, and vacuum pumps using such an improved piston system.
To achieve the above objects, the present invention discloses a reciprocating rotary piston system comprising a cylinder having an annular and hollow interior; a plurality of pistons of which first and second parties are formed to be disposed alternately on the same inner circumference of the cylinder, the first and second parties of the pistons reciprocating along a given arc at the same speed and in the opposite direction with respect to each other; a plurality of intake valves mounted at each point of the cylinder where the two adjacent pistons meet for controlling flow of a fluid introduced thereinto from the outside; and a plurality of exhaust valves mounted at each point of the cylinder where the two adjacent pistons meet for controlling flow of a fluid forced out from the inside.
According to a first feature of the present invention, the cylinder includes an outer cylindrical part, first and second annular disks each joined to both sides of the outer cylindrical part, third and fourth annular disks each having an outer circumference joined to an inner circumference of each first and second annular disk, and an inner cylindrical part rotatably joined to an inner circumference of the respective third and fourth annular disks, wherein the first party of the pistons is connected to the third and fourth annular disks, and the second party of the pistons is joined to an outer surface of the inner cylindrical part. The first and second parties of the pistons turn in the opposite direction as the third and fourth annular disks and the inner cylindrical part turn in the relatively opposite direction with respect to each other.
According to a second feature of the present invention, the cylinder includes an outer cylindrical part, first and second annular disks each joined to both sides of the outer cylindrical part, and a first and second piston support bodies each having third and fourth annular disks each having an outer circumference joined to an inner circumference of each first and second annular disk, and first and second inner cylindrical parts extending inwardly from the-third and fourth annular disks.
In this case, the first party of the pistons is fixed to the first piston support body, the second party is fixed to the second piston support body, and the first and second parties of the pistons turn in the opposite direction as the first and second piston support bodies turn in the relatively opposite direction with respect to each other. The number of the plurality of pistons is 2n (n=positive constant more than 2).
The piston system is of symmetrical structure centering around its axis in order to minimize occurrance of vibration and noise.
The system further includes first and second driving means for reciprocating the first and second parties of the piston along a given arc within the cylinder at the same speed and in the opposite direction with respect to each other. In this case, the piston system constitutes one of a hydraulic pump, a pneumatic pump, and a vacuum pump.
The first and second driving devices include a torque generator, a first crank driving gear rotating by the torque, a second crank driving gear geared into the first crank driving gear and rotating, and first and second crank assemblies for making the first and second parties of the pistons reciprocate along a given arc within the cylinder as the first and second crank driving gears rotate.
According to another aspect of the present invention, the piston system further includes a plurality of spark plugs each installed in a plurality of chambers formed by rotating motions of the pistons for igniting a mixture of fuel and air introduced into each chamber through the intake valves whenever the pistons approach a top dead center or a bottom dead center; a controller controlling a plurality of intake valves, exhaust valves, and spark plugs so as to perform an intake stroke of the mixture, a compression stroke of the mixture, an expansion stroke of a burnt gas created by ignition of the mixture, and an exhaust stroke of the burnt gas in the plurality of chambers sequentially; first and second crank assemblies each connected to the first and second parties of the pistons reciprocating along a given arc within the cylinder at the same speed and in the opposite direction with respect to each other by the expansion stroke of the exhaust gas for converting the reciprocating motions into rotating motions; and first and second crank gears for generating a torque by adding rotating forces of the first and second crank assemblies acting in the opposite direction. The piston system constitutes an internal combustion engine, obtaining a torque from a rotating shaft of the first or second crank gear.
The interior of each of the plurality of pistons and the cylinder is one of square, oval, and circular shapes.
In the meantime, a reciprocating rotary internal combustion engine using the inventive piston system, includes a cylinder having an annular and hollow interior; a plurality of
Kim Chang Kyun
Kim Seung Kyun
Denion Thomas
Rosenberg , Klein & Lee
Trieu Thai-Ba
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