IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0148574
(1998-09-04)
|
발명자
/ 주소 |
|
대리인 / 주소 |
Emerson & AssociatesEmerson
|
인용정보 |
피인용 횟수 :
5 인용 특허 :
8 |
초록
▼
This design utilizes spherical balls that function as pumping members and also function as bearing loads. The housing includes channels that are used to convert rotary motion to true linear reciprocating motion relative to the center of operation by use of modified involute profile curves. The chann
This design utilizes spherical balls that function as pumping members and also function as bearing loads. The housing includes channels that are used to convert rotary motion to true linear reciprocating motion relative to the center of operation by use of modified involute profile curves. The channels have an enlarged radius of curvature, four (4) contact point designs, and an arch design depending upon application and loads, etc. A variable vane shaft and variable seal plug have a make-before-break design that eliminates damaging high pressure spikes due to the trapped fluid. The vane is used to vary and control pumping arc by directing the high and low pressures. A rotor disclosed has an angle and slots that are designed to align with tangent of the involute curve. The variable displacement disclosed herein is varied by varying the pumping arc thereby causing more or less fluid to be pumped from inlet pressure to inlet pressure which actually affects displacement and input power required. The stroke is always maintained the same and the fluid is not just bypassed or allowed to leak from discharge to inlet, which would not affect input power. The design disclosed herein accomplishes its function with reduced complexity compared to piston pumps, which vary stroke, vane, or other pumps which vary eccentricity by shifting or rotating components.
대표청구항
▼
[ Having thus described the invention, it is now claimed:] [1.] A variable displacement load device having a center of operation, comprising:at least two spherical balls having a radius of curvature;a front cover housing having a port, and channel, said port able to direct inlet pressure to said mec
[ Having thus described the invention, it is now claimed:] [1.] A variable displacement load device having a center of operation, comprising:at least two spherical balls having a radius of curvature;a front cover housing having a port, and channel, said port able to direct inlet pressure to said mechanical face seal, said channel having an involute profile, a depth, a tangent, and a radius of curvature, said channel involute profile having four regions comprised of two regions of involute curves, a radius dwell region, and a blended radius region;a rotor having slots, two sides, an inner and outer diameter and a center, said slots each having a radius of curvature, ports and an angle, said slot angle being aligned with said tangent of said channel involute profile, said slots mirroring one another on said sides of said rotor, said slots rotate around said channel of said front cover housing, said ports being able to allow a fluid to enter and exit said rotor slots, said slots radius of curvature being minimized as compared to said channel radius of curvature thus allowing said balls to roll within said channel involute profile and limit internal leakage;a variable seal plug having a hole, said hole providing a path for said fluid to move in and out of said rotor slots, said variable seal plug mounted to said rear cover;a variable vane shaft having an external drive, said variable vane shaft able to vary its location with respect to said housing channel by said external drive; and,a rear cover housing having a mounting surface, an inlet port, channels, said port able to direct low pressure to said variable seal plug and variable vane shaft, said channels having an involute profile, a depth, a tangent, and a radius of curvature, said channel involute profile having four regions comprised of two regions of involute curves, a radius dwell region, and a blended radius region.
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