Rotary expansible chamber devices – Intermittently accelerated and receding members rotate in... – Each a working member
Reexamination Certificate
2000-10-27
2002-10-08
Vrablik, John J. (Department: 3748)
Rotary expansible chamber devices
Intermittently accelerated and receding members rotate in...
Each a working member
C418S037000
Reexamination Certificate
active
06461127
ABSTRACT:
TECHNICAL FIELD
The present invention relates to a fixed displacement suction and exhaust apparatus using coaxial rotary pistons, which can be used for various kinds of compressors, vacuum pumps, fluid transfer pumps or internal combustion engines, and more particularly, to a fixed displacement suction and exhaust apparatus using coaxial rotary pistons, wherein a crank pin of a crankshaft is installed to rotate two rotary pistons at different speeds.
BACKGROUND ART
A suction and exhaust apparatus using coaxial rotary pistons refers to a suction and exhaust apparatus having a mechanism in which suction and exhaust functions are performed by a change in the displacement between two rotary pistons by rotating the two rotary pistons at different speeds such that a plurality of suction and exhaust chambers are formed by the two rotary pistons in an annular cylinder to then be rotated along a coaxial line.
Reciprocating piston suction and exhaust apparatuses based on linear motion, which are currently in widespread use, are constructed to alternately actuate suction and exhaust functions by a set of a cylinder and a piston. Thus, whenever suction and exhaust functions are alternately performed, valves must be actuated. Also, when the displacement is increased, many cylinders and pistons are required. Further, since the cylinder of the side connected to a connecting rod is opened, the displacement efficiency is generally below 50%. To solve the above problems, there have been developed fixed displacement suction and exhaust apparatuses wherein two rotary pistons are rotated in an annular cylinder to form suction and exhaust chambers between the pistons.
Japanese Patent Publication No. Hei 5-7524 describes a planetary gear device having a sun gear, a planetary gear and an internal gear engaged in a non-circular gear combination, and a rotary piston suction and exhaust apparatus constructed to make a plurality of rotary pistons revolve at unfixed speeds inside a cylinder in synchronization with unfixed-speed revolution applied to a plurality of planetary shafts by the planetary gear device. In this suction and exhaust apparatus, since a plurality of gears are engaged in a non-circular gear combination to then be rotated, problems may be encountered with precise fabrication of gears and load resistance.
Japanese Patent Laid-open publication No. Hei 8-296401 describes an engine apparatus based on relative motion constructed to rotate a rotary piston at unfixed speeds by connecting the rotary piston to the output shaft provided in the center of a cylinder using a crankshaft. This apparatus rotates the rotary piston by complex inversion driving, in which the rotation force of the output shaft serves as a crankshaft, so that pressure is applied to the crankshaft, thereby disabling to embody the apparatus.
Japanese Patent Publication No. Hei 6-96964 describes a rotary piston engine for performing suction and exhaust functions, wherein an engine shaft coupled to an eccentric shaft acceptor, is connected to a flat shaft, and an external gear provided on the flat shaft and an internal gears provided on a cavity are combined in a ratio of 2:1 by being combined with a cylinder rotating together with the engine shaft, to thus rotate two pistons opposed to each other by a lever fixed to the eccentric shaft. According to this apparatus, since the output shaft and the flat shaft are connected to the eccentric shaft, the connecting portion thereof is liable to damages under high power.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide a complex-cycle suction and exhaust apparatus that is easily fabricated due to a simplified structure and has a plurality of suction and exhaust chambers.
The object of the present invention is achieved by a suction and exhaust apparatus according to the present invention, wherein two rotary pistons having a plurality of wing plates for partitioning a cylinder into a plurality of suction and exhaust chambers, are engaged with each other so as to be installed coaxially with cylinder axis lines, the two coaxial rotary pistons are connected to a crank pin of a crankshaft to then be rotated at different speeds, and the spaces between each of the respective wing plates of the two rotary pistons are hermetically sealed to make independent suction and exhaust chambers, thereby performing suction and exhaust functions.
According to the present invention, there is provided a suction and exhaust apparatus including a cylindrical, hermetically sealed housing having supporting holes for supporting a main axis of a crankshaft, formed at both ends, and having an internal gear (or external gear) formed therein, the internal gear having the supporting holes as concentric circles thereof; a piston block having a plurality of wing plates for forming a plurality of independent hermetically sealed chambers formed inside the housing by radially protruding the outer circumference of an annular disk coaxially rotatably installed in the housing to then be hermetically sealed with the inner circumference of the housing, the piston block configured such that two rotary pistons having a connection hook on the inner circumference are engaged with each other while the wing plates cross each other; and a rotation device having a crankshaft installed coaxially with the housing so that the crank pin of the crankshaft is disposed within the annular space in the center of the rotary piston, a connecting rod rotatably connected to the crank pin of the crankshaft, external gears (or internal gears) having a teeth proportion for engagement with internal gears provided on the housing, at both ends of the shaft acceptor of the connecting rod, and two connecting rod elements for independently rotating two rotary pistons by connecting the same with a connecting hook facing the two the rotary pistons, formed at either side of the center of the shaft acceptor of the connecting rod.
The housing of the present invention consists of a cylinder and sealing plates for hermetically sealing both ends of the cylinder, and the sealing plates have a bearing for supporting the crankshaft to be rotated, mounted in a crankshaft hole installed coaxially with the cylinder. The internal gear engaged with the external gear rotating round the crank pin of the crankshaft are installed coaxially with the crankshaft. A suction hole, an exhaust hole and an ignition plug may be further formed in the cylinder according to use of the suction and exhaust apparatus. The internal gear may be mounted by fixing a gear ring, and bearings for supporting rotation of each of two rotary pistons installed inside may also be further installed on the inner surfaces of the two sealing plates.
The piston block includes two rotary pistons having the same shape and rotatably coupled with respect to the contact surface thereof to then independently be rotated, each rotary piston having an annular disk the outer diameter of which is smaller than the inner diameter of the cylinder, a plurality of wing plates radially protruding from the outer circumference of the disk, and a connection hook formed on the inner circumference of the disk. The contact surface of the two rotary pistons is leveled with the cylinder such that it is possible for the two rotary pistons to be rotated relatively in a state in which the two rotary pistons are hermetically sealed, and the outer surfaces thereof are supported by a bearing mounted on the housing to then be rotated, independently. In the radial wing plates of the rotary pistons, the axial widths thereof are the same as those of the rotary pistons. Thus, one plane of each wing plate is positioned on the same plane with one plane of the integrally formed rotary piston, and the opposite plane thereof is positioned on the same plane with the opposite outer plane of the piston coupled thereto, so that both planes of the wing plate of the rotary piston are hermetically sealed to the inner surface of the sealing plates. Also, the outer-end surface of the wing plates rotates within the cylinder in a st
Perkins Coie LLP
Vrablik John J.
LandOfFree
Fixed displacement suction and exhaust apparatus utilizing... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Fixed displacement suction and exhaust apparatus utilizing..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fixed displacement suction and exhaust apparatus utilizing... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2968057