Electrical generator or motor structure – Dynamoelectric – Rotary
Reexamination Certificate
1997-03-17
2001-08-14
Nguyen, Tran (Department: 2834)
Electrical generator or motor structure
Dynamoelectric
Rotary
C310S07500D, C310S020000
Reexamination Certificate
active
06274959
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a driving apparatus utilizing permanent magnets.
2. Description of the Related Art
Reciprocating engines mounted on cars and the like are known as one kind of driving apparatus. The reciprocating engine generally comprises a plurality of cylinders having a combustion chamber in which a reciprocating piston is provided. The piston is operatively connected to a crankshaft via a connecting rod. The crankshaft is in turn operatively connected to a drive shaft via a transmission or other transmitting mechanism so as to transmit a driving force to tires of the car. A mixture of gasoline and air is burned in the combustion chamber after injection of the gasoline and air into the combustion chamber so that force generated thereby reciprocates the piston so as to rotate the crankshaft. Torque of the crankshaft is in turn transmitted to the drive shaft.
However, known reciprocating engines combust gasoline so that noxious gas containing soot, nitrogen oxide and other components is released into the atmosphere. Environmental deterioration due to the noxious exhaust gas has been a serious problem.
SUMMARY OF THE INVENTION
It is therefore a primary object of the present invention to provide driving force without deteriorating the environment by utilizing attraction and repulsion of permanent magnets.
In a first aspect of the present invention, a driven member having a first permanent magnet and a movable member having a second permanent magnet are arranged in such a manner that the movable member reciprocates between attracting position in which both first and second permanent magnets are attracted to each other and a repelling position in which both first and second permanent magnets are repelled from each other. The driven member is driven by moving the movable member between the two positions. The driving force of the driven member created thereby is used as a source of mechanical power. In this arrangement, as the movable member reciprocates between the attracting and repelling positions, the first permanent magnet is attracted to or repelled from the second permanent magnet. The attractive and repulsive forces of these magnets are used to drive the driven member.
In a second aspect of the present invention, a gap between one side of the first permanent magnet of the driven member and the same side of the second permanent magnet of the movable member differs from a gap between the other side of the first permanent magnet and the same side of the second permanent magnet. With this arrangement, attractive and repulsive forces formed between the first and second permanent magnets differ between the two sides of each magnet. This causes the driven member to be driven in a reliable manner.
In a third aspect of the present invention, at least two sets of first and second permanent magnets are provided in such a manner that a permanent magnet having one polarity and another permanent magnet having the opposite polarity are alternately placed next to each other. With this arrangement, the entire attractive and repulsive forces for driving the driven member are increased with use of a plurality of sets of the permanent magnets.
In a fourth aspect of the present invention, the movable member is driven by a fluidic pressure of a fluidic cylinder.
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Examination Report issued by Australian Patent Office on Jun. 23, 1997 regarding counterpart Australian application S.N. 16325/97.
European Search Report, Aug. 5, 1997.
Nguyen Tran
TraskBritt PC
LandOfFree
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