Patent US5189544A successfully refreshed from Google Patents.
Patent US3649141A successfully refreshed from Google Patents.
US3649141A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary pump with integral rotor construction
Assignee: Individual
•
Filing: 1970-10-14
•
Granted: 1972-03-14
•
Expires: 1990-10-14
Abstract
Abstract A rotary pump of unitary rotor construction disposed within a housing having a cylindrical inner surface. A tubular shaft extends from one end of the rotor and supplies fluid to the axis of the rotor. A pair of axially spaced cylindrical disks concentric with the shaft form with the inner wall of the housing a pump discharge chamber. A pair of cylindrical pumping cams eccentrically formed on the shaft are disposed outwardly of said cylindrical disks with the eccentricity or high point of one cam being diametrically opposite the high point of the other. A pair of radially movable gate members urged into engagement with diametrically opposed surfaces of each of said cams define with the outer surface of the cam, the housing and concentric disks four separate fluid chambers, one on each side of said gates. The gates engaged with one cam lie in a plane approximately perpendicular to a plane containing the gates engaged with the other cam. A suction port extends radially from the bore of the tubular shaft to the outer surface of each cam and a pressure or discharge port extends axially from the outer surface of each cam into communication with the annular discharge chamber disposed intermediate said cams. The suction and pressure ports of each cam are located on opposite sides of its high point and located diametrically opposite the suction and discharge ports respectively of the other cam.
Inventors
- 👤 Charles E Belcher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:07
CPC Classifications
F; F04; F04C; F04C11/00; F04C11/001
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
98 words
A rotary pump comprising a housing with a rotor rotatably supported therein, said rotor having a shaft of tubular construction serving as a fluid supply conduit for said pump, said rotor including axially spaced pumping cams eccentricallY disposed about said shaft with an annular discharge chamber therebetween, each of said cams including a suction port extending from said conduit to the rim of said cam and a discharge port extending from said rim to said discharge chamber, and a pair of radially movable gate members urged into engagement with the diametrically opposed surfaces of each of said cams.
Claim 2
Dependent Claim
98 words
A rotary pump comprising a housing with a rotor rotatably supported therein, said rotor having a shaft of tubular construction serving as a fluid supply conduit for said pump, said rotor including axially spaced pumping cams eccentricallY disposed about said shaft with an annular discharge chamber therebetween, each of said cams including a suction port extending from said conduit to the rim of said cam and a discharge port extending from said rim to said discharge chamber, and a pair of radially movable gate members urged into engagement with the diametrically opposed surfaces of each of said cams.
Claim 3
Dependent Claim
48 words
A rotary pump as set forth in claim 1 in which the eccentricity of each of said cams extends in diametrically opposite directions, and in which the discharge and suction ports of one cam are disposed diametrically opposite the discharge and suction ports respectively of the other cam.
Claim 4
Dependent Claim
17 words
A rotor pump as set forth in claim 2 in which said rotor is of integral construction
Claim 5
Dependent Claim
183 words
A rotary pump as set forth in claim 3 in which said rotor includes a pair of axially spaced cylindrical disks concentric with said shaft and defining with the inner wall of the pump housing said annular discharge chamber, said pumping cams being of cylindrical configuration extending in height axially from the outer surface of said disks and of a radius less than the radius of said disks by the extent of eccentricity of said cams, said pumping cams being concentrically disposed on said shaft so that the rim of each cam, at it high point, is generally flush with the rim of the adjacent disk over a small arc of the circumference of said disk, said discharge ports being disposed forwardly of the high point of said cam, in its direction of rotation, and said suction ports trailing said high point, in its direction of rotation, said disks, gate members, pump housing and rims of said cams providing about each cam a pair of fluid chambers which alternately serve as pumping and suction chambers during rotation of said rotor within said housing.
Claim 6
Dependent Claim
197 words
A rotary pump comprising a housing with a generally cylindrical inner surface, a shaft supported rotor disposed within said housing, said rotor comprising axially spaced cylindrical disks concentric with said shaft and forming with the inner wall of the pump housing an annular discharge chamber, a pair of cylindrical pumping cams of smaller diameter than said disks eccentric with respect to said shaft such that the eccentricity of each extends in diametrically opposite directions, said shaft being tubular in part to provide a fluid passage therein, each cam including a suction port extending radially from said fluid passage to the rim of said cam and a discharge port extending from the rim of each of said cams into communication with said annular discharge chamber and a pair of radially movable gate members urged into engagement with diametrically opposed surfaces of each of said cams, the discharge ports being located forward of the high point of said cams in their direction of rotation and on diametrically opposite sides of the rotor, said suction ports trailing said high points and on diametrically opposite sides of the rotor, and a discharge opening in said housing communicating with said discharge chamber.
Claim 7
Dependent Claim
197 words
A rotary pump comprising a housing with a generally cylindrical inner surface, a shaft supported rotor disposed within said housing, said rotor comprising axially spaced cylindrical disks concentric with said shaft and forming with the inner wall of the pump housing an annular discharge chamber, a pair of cylindrical pumping cams of smaller diameter than said disks eccentric with respect to said shaft such that the eccentricity of each extends in diametrically opposite directions, said shaft being tubular in part to provide a fluid passage therein, each cam including a suction port extending radially from said fluid passage to the rim of said cam and a discharge port extending from the rim of each of said cams into communication with said annular discharge chamber and a pair of radially movable gate members urged into engagement with diametrically opposed surfaces of each of said cams, the discharge ports being located forward of the high point of said cams in their direction of rotation and on diametrically opposite sides of the rotor, said suction ports trailing said high points and on diametrically opposite sides of the rotor, and a discharge opening in said housing communicating with said discharge chamber.
References Cited (Backward Citations)
US2316318A
Cited
US2462732A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-03-14 | 1975-09-13 | 1976-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-14 | 1979-09-13 | 1980-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-14 | 1983-09-13 | 1984-03-14 | $7700.00 | Window Closed / Lapsed |