Expansible chamber devices – With linkage or transmission engaging portion intermediate...
Patent
1989-11-03
1992-06-23
Look, Edward K.
Expansible chamber devices
With linkage or transmission engaging portion intermediate...
92150, 92165R, 123 53A, 123 56BC, F01B 900, F02B 2512
Patent
active
051233347
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to a pump or motor comprising: at least one piston body; a cylindrical housing in which said piston body may reciprocate; a cover for closing of said housing for obtaining a closed compartment between said piston body and said housing; a piston rod connected to said piston body; a shaft rotatably supported by said housing and running in transverse direction in respect of the direction of movement of said piston body; and connecting means located between said shaft and said piston rod for converting either a rotational movement of said shaft into a rectilinear movement of said piston body or a rectilinear movement of said piston body into a rotational movement of said shaft or of a part cooperating with this.
A pump of the type described above can be used for compressing fluids, in particular for obtaining high pressures and when no large volumes have to be transported.
In case of a motor of the type described above a mixture of air and fuel is combusted in the closed compartment by means of a sparking plug, mounted in the cylinder cover. By this the piston body is brought into movement, said movement being converted into a rotational movement of the shaft.
In case of the known pumps and motors the cylindrical housing is usually connected to a crankcase supporting the shaft which is shaped as a crankshaft, and the piston rod is pivotally connected to said crankshaft and to said piston body.
Such a construction is relatively cumbersome because only one end surface of the piston is used and the length of the piston has to be such large that tilting of the piston is opposed as much as possible.
By U.S. Pat. No. 4,013,048 a motor is known comprising two piston bodies provided in two cylindrical housings being in coaxial alignment with each other. Both piston bodies are provided with a piston rod which is fixedly connected to the related piston. The free ends of the said rods are connected to a yoke housing provided with a central slot in transverse direction to the center line of the cylindrical housings, in which slot the crank of a crankshaft is moving. This also brings a cumbersome construction with it as well as an unfavourable loading of some parts of the motor.
OBJECTS AND SUMMARY OF THE INVENTION
Now the object of the invention is to remove these disadvantages and to this end a pump or motor according to the invention is characterized in that both ends of the substantially cylindrical housing are closed off for forming a working compartment at either side of the piston body. The piston body is provided with a cavity which is shaped such that in it one piston rod can be received and that the crankshaft can pass through the piston body.
According to one embodiment of the invention the cylindrical housing is provided in a cylindrical rotor, the axis of which is running transverse to the axis of the cylindrical housing, said rotor is rotatably supported by a casing in which the crankshaft is fixedly mounted such that a rotational movement of rotor is converted into a reciprocating movement of the piston body in said cylindrical housing or vice versa.
A very stable construction can be obtained when the crankshaft is provided with an eccentrically mounted circular disk and said piston rod is having an angular portion being supported by said disk.
In case of such an embodiment, the shaft can run through as one entire whole and can better transfer the loads exerted on it.
According to a further embodiment, the piston body is provided at least at one end with an additional piston rod in coaxial alignment with the cylindrical housing and fixedly connected to said piston body and sealingly extending through the related cylinder cover. The piston rod is connected to a secondary piston which may reciprocate in a secondary housing mounted to the cylindrical housing.
Obviously, the secondary piston will move together with the main piston body and can be used e.g. for compressing air for the combustion mixture or for pumping lubricant being used in the pump or motor
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patent: 4185597 (1980-01-01), Cinquegrani
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patent: 4936111 (1990-06-01), Wilkinson et al.
H.P. van der Waal B.V.I.O.
Look Edward K.
Ryznic John
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