Claims
- 1. A rotary vane pump, comprising:
- (a) a housing having an inner cam surface defining a chamber, said housing having an inlet and an outlet for establishing fluid communication with said chamber;
- (b) a plurality of vanes arranged substantially about a central vane axis of rotation, each said vane having an edge for following said cam surface;
- (c) a rotatable carousel rotor positioned in said chamber for driving movement of said vanes, said carousel having a drive axis of rotation displaced a predetermined distance from said central vane axis, said carousel having spaced slot members positioned therein for reciprocally carrying said vanes during rotation of said vanes;
- (d) a central rotor means rotatably mounted in said housing on said central vane axis, said central rotor means including a one-piece member for pivotally coupling each said vane thereto at a point offset from said vane axis to establish rocking lever action between said carousel and said vanes upon rotation of said vanes by said carousel;
- (e) said inlet and outlet being located opposite and in line with one another along a flow axis;
- (f) said housing having an inner surface including at least one inclined fluid escape channel for directing fluid out of an upper portion of said chamber to a lower portion of said chamber for expulsion during rotation of said vanes; and,
- (g) each said vane being carried in said central rotor means and carousel rotor so that during rotation of said carousel a pair of said vanes move through a position in which said pair of vanes are situated on a line offset from said central vane axis and parallel to said flow axis.
- 2. The apparatus of claim 1, wherein said coupling means comprises each said vane being hingedly connected to said rotor means along substantially the entire transverse width of said vane.
- 3. The apparatus of claim 1, wherein said central rotor means comprises a spider gear having a plurality of equally spaced grooves and each of said vanes includes a cylindrical pivot portion pivotally coupled in each said groove.
- 4. The apparatus of claim 1, wherein said carousel walls form equally spaced openings and further including a slotted pin rotatably disposed in each said opening for reciprocally receiving each said vane.
- 5. The apparatus of claim 1, wherein there are six vanes.
- 6. A rotary vane pump, comprising:
- (a) a housing having an inner cam surface defining a chamber, said housing having an inlet and an outlet For establishing fluid communication with said chamber;
- (b) a plurality of vanes arranged substantially about a central vane axis of rotation, each said vane having an edge for following said cam surface;
- (c) a rotatable carousel rotor positioned in said chamber for driving movement of said vanes, said carousel having a drive axis of rotation displaced a predetermined distance from said central vane axis said carousel having spaced slot members positioned therein for reciprocally carrying said vanes during rotation of said vanes:
- (d) a central rotor means rotatably mounted in said housing on said central vane axis, said central rotor means including a one-piece member for pivotally coupling each said vane thereto at a point offset from said vane axis to establish rocking lever action between said carousel and said vanes upon rotation of said vanes by said carousel;
- (e) said inlet and outlet being located opposite and in line with one another; and
- (f) each said vane being carried in said central rotor means and carousel rotor so that during rotation of said carousel a first pair of said vanes move through a first position in which said first pair of vanes are situated on a line offset from said central vane axis and parallel to said flow axis.
- 7. The apparatus of claim 6, wherein each said vane is carried in said central rotor means and carousel so that a second pair of said vanes move through a position perpendicular to said first position in which said pair of vanes are situated on a line which passes through said central vane axis.
- 8. The apparatus of claim 7, wherein said inner cam surface is elliptical, having its width as measured in a direction parallel to said flow axis being less than its height as measured in a direction perpendicular to said flow axis.
- 9. The apparatus of claim 8, wherein said width is substantially in the range of from 0.05 to 0.07 percent less than said height.
Parent Case Info
This application is a continuation-in-part of application Ser. No. 08/309,791, filed Sep. 21, 1994, which is a continuation-in-part of application Ser. No. 08/104,341, filed, now abandoned.
US Referenced Citations (8)
Foreign Referenced Citations (2)
Number |
Date |
Country |
0885605 |
Sep 1943 |
FRX |
2240519 |
Mar 1974 |
DEX |
Continuation in Parts (2)
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Number |
Date |
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Parent |
309791 |
Sep 1994 |
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Parent |
104341 |
Aug 1993 |
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