1. A scroll fluid machine comprising:
a drive shaft having an eccentric axial portion at one end;
a stationary scroll comprising a stationary end plate having a stationary wrap;
an orbiting scroll comprising an orbiting end plate having an orbiting wrap, the orbiting scroll being rotatably mounted around the eccentric axial portion of the drive shaft, the orbiting scroll being eccentrically revolved with respect to the stationary scroll by the drive shaft so that fluid in a sealed chamber between the stationary and orbiting wraps may be compressed toward a center;
a self-rotation preventing mechanism for preventing the orbiting scroll from rotating its own axis, said mechanism being provided near an outer circumference of the stationary scroll;
a first permanent magnet provided on the stationary end plate; and
a second permanent magnet provided on the orbiting end plate so that the same poles of the first and second permanent magnets are opposite to each other thereby preventing the orbiting scroll to press the stationary scroll excessively.
2. A scroll fluid machine as claimed in claim 1 wherein the same poles of the first and second permanent magnets are opposite to each other in the self-rotation preventing mechanism.
3. A scroll fluid machine as claimed in claim 1 wherein the self-rotation preventing mechanism comprises a main shaft, an eccentric shaft and a larger-diameter shell between the stationary and orbiting scrolls, the first permanent magnet being provided on the larger-diameter shell, the second permanent magnet being provided on the orbiting scroll, the same poles of the first and second magnets being opposite to each other.
4. A scroll fluid machine as claimed in claim 1 wherein one of the first and second permanent magnets is annular, the permanent magnet being within region of the annular magnet even if the orbiting scroll is eccentrically revolved with respect to the stationary scroll.
5. A scroll fluid machine as claimed in claim 1 wherein the first and second permanent magnets are enclosed with a non-magnetic cover.
6. A scroll fluid machine as claimed in claim 1 wherein the first and second permanent magnets are covered with a corrosion resistant cover.
7. A scroll fluid machine as claimed in claim 1 wherein a cover of the first permanent magnet is engaged with a screw to allow axial position of the magnet to be kept suitably.
8. A scroll fluid machine as claimed in claim 1 wherein the magnets are screwed so that axial position of the magnets may be adjusted.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A solenoid fluid control valve, comprising:
a fluid control body adapted for being received in a fluid housing, said fluid control body including a central cavity, and having a radially extending pressure supply passage and a pressure control passage;
a feed supply tube positioned in said central cavity, said feed supply tube including an outer diameter in direct communication with said pressure control passage, and including an inner bore forming a portion of said pressure supply passage, said feed supply tube being supported in said central cavity of said fluid control body by at least one flying buttress structure interposed therebetween, said feed supply tube including a valve seat receiving area;
a valve seat portion being made of a plastic material and press fit onto said valve seat receiving area to form a valve receiving chamber, said valve seat portion including a valve seat and a passage in communication between said valve seat and said pressure control passage;
a valve contained in said valve receiving chamber for closing off communication between said pressure supply passage and said pressure control passage; and
a solenoid for opening said valve in response to a signal.
2. The invention according to claim 1, wherein said solenoid includes a central axis and has a coil wound around a bobbin, spaced from and positioned around said central axis, said coil having radially stepped radial inner diameters.
3. The invention according to claim 2, further comprising a casing member for attaching said solenoid to said control body, a portion of said casing member extending into the stepped portion of said coil for forming a flux tube therein, said bobbin including a C-shaped integrally molded retention ring.
4. The invention according to claim 3, further comprising an armature axially movable within said bobbin.
5. The invention according to claim 4, wherein said armature includes at least one area defining a pressure relief vent formed thereon.
6. The invention according to claim 4, further comprising a pole piece adjacent said armature interposed between said bobbin and said fluid control body.
7. The invention according to claim 6, further comprising a control rod extending along said central axis and through said pole piece for opening of said valve.
8. The invention according to claim 6, said valve seat portion further comprising at least one wing member in proximity to said pole piece, and wherein at least one tolerance of said valve seat portion is maintained such that the distance between said valve seat and the upper surfaces of said at least one wing member in proximity to said pole piece is maintained within a tolerance of \xb10.025 mm.
9. The invention according to claim 1, wherein said solenoid fluid control valve is a ball valve.
10. A solenoid fluid control valve, comprising:
a fluid control body adapted for being received in a fluid housing, said fluid control body including a central cavity, and having a radially extending pressure supply passage and a pressure control passage;
a feed supply tube positioned in said central cavity, said feed supply tube including an outer diameter in direct communication with said pressure control passage, and including an inner bore forming a portion of said pressure supply passage, said feed supply tube being supported in said central cavity of said control body by at least one flying buttress structure interposed therebetween, said feed supply tube including a valve seat receiving area;
a valve seat portion being made of a plastic material and press fit onto said valve seat receiving area to form a valve receiving chamber, said valve seat portion including a valve seat and a passage in communication between said valve seat and said pressure control passage;
a valve contained in said valve receiving chamber for closing off communication between said pressure supply passage and said pressure control passage;
a solenoid for opening said valve in response to a signal, said solenoid including a central axis and having a coil wound around a bobbin, spaced from and positioned around said central axis, said coil having radially stepped radial inner diameters;
a casing member for attaching said solenoid to said control body; a portion of said casing member extending into the stepped portion of said coil for forming a flux tube therein, said bobbin including a C-shaped integrally molded retention ring; and
an armature axially movable within said bobbin.
11. The invention according to claim 10, wherein said armature includes at least one area defining a pressure relief vent formed thereon.
12. The invention according to claim 10, further comprising a pole piece adjacent said armature and interposed between said bobbin and said fluid control body.
13. The invention according to claim 12, further comprising a control rod extending along said central axis and through said pole piece for opening of said valve.
14. The invention according to claim 10, said valve seat portion further comprising at least one wing member in proximity to said pole piece, and wherein at least one tolerance of said valve seat portion is maintained such that the distance between said valve seat and the upper surfaces of said at least one wing member in proximity to said pole piece is maintained within a tolerance of \xb10.025 mm.
15. The invention according to claim 10, wherein said solenoid fluid control valve is a ball valve.
16. A solenoid fluid control valve, comprising:
a fluid control body adapted for being received in a fluid housing, said fluid control body including a central cavity, and having a radially extending pressure supply passage and a pressure control passage;
a feed supply tube positioned in said central cavity, said feed supply tube including an outer diameter in direct communication with said pressure control passage, and including an inner bore forming a portion of said pressure supply passage, said feed supply tube including a valve seat receiving area;
a valve seat portion being made of a plastic material and press fit onto said valve seat receiving area to form a valve receiving chamber, said valve seat portion including a valve seat and a passage in communication between said valve seat and said pressure control passage;
a valve contained in said valve receiving chamber for closing off communication between said pressure supply passage and said pressure control passage;
a solenoid for opening said valve in response to a signal, said solenoid including a central axis and having a coil wound around a bobbin, spaced from and positioned around said central axis, said coil having radially stepped radial inner diameters;
a casing member for attaching said solenoid to said control body;
a pole piece adjacent said armature and interposed between said bobbin and said fluid control body;
a flux tube secured by said casing member, said flux tube including a support portion extending therefrom; and
an armature axially movable within said bobbin.
17. The invention according to claim 16, wherein said armature includes at least one area defining a pressure relief vent formed thereon.
18. The invention according to claim 16, wherein said armature includes an axially extending rod portion extending from said armature into said support.
19. The invention according to claim 18, further comprising a bearing secured in said support wherein said rod portion slidingly extends through said bearing portion, said bearing stabilizing the movement of said armature.
20. The invention according to claim 16, said valve seat portion further comprising at least one wing member in proximity to said pole piece, and wherein at least one tolerance of said valve seat portion is maintained such that the distance between said valve seat and the upper surfaces of said at least one wing member in proximity to said pole piece is maintained within a tolerance of \xb10.025 mm.
21. The invention according to claim 16, wherein said solenoid fluid control valve is a ball valve.