Patent US3870437A successfully refreshed from Google Patents.
US3870437A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Planetary gear pump
Assignee: Individual
•
Filing: 1973-11-21
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Granted: 1975-03-11
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Expires: 1993-11-21
Abstract
Abstract A pump wherein a central rotating gear drives flexible planet gears about its circumference and inside a circumferential ring gear shaped outer housing. The space between the central rotating gear and the circumferential ring gear varies in cross sectional area to form a pumping chamber and communicates with inlet and outlet ports to permit pumping of fluid therethrough. The variable shape of the pumping chamber is achieved through the use of non-concentric ring and sun gears, non-circular sun and ring gears, flexible segments in the ring gear, or a flexible sun gear.
Inventors
- 👤 John T Gondek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:45
CPC Classifications
F; F04; F04C; F04C5/00; F04B; F04B43/00; F04B43/0009; F04B43/0027
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
140 words
A fluid pump comprising: a generally cylindrical drive member adapted for rotation about its axis and having gear teeth about its circumference to form a sun gear; a housing surrounding and supporting said drive member and having a flexible inner circumferential surface disposed at a varying distance from said generally cylindrical drive member so as to form a pumping chamber therebetween said inner surface having gear teeth thereon to form a ring gear; inlet and outlet passageways in communication with said pumping chamber; a plurality of generally rigid rolling members held between said drive member and said inner circumferential surface adapted to be rolled by said drive member about said inner surface and carry fluid through said pumping chamber from said inlet ports to said outlet ports said rolling members having gear teeth about their circumference to form planetary gears.
Claim 2
Dependent Claim
140 words
A fluid pump comprising: a generally cylindrical drive member adapted for rotation about its axis and having gear teeth about its circumference to form a sun gear; a housing surrounding and supporting said drive member and having a flexible inner circumferential surface disposed at a varying distance from said generally cylindrical drive member so as to form a pumping chamber therebetween said inner surface having gear teeth thereon to form a ring gear; inlet and outlet passageways in communication with said pumping chamber; a plurality of generally rigid rolling members held between said drive member and said inner circumferential surface adapted to be rolled by said drive member about said inner surface and carry fluid through said pumping chamber from said inlet ports to said outlet ports said rolling members having gear teeth about their circumference to form planetary gears.
Claim 3
Dependent Claim
140 words
A fluid pump comprising: a generally cylindrical drive member adapted for rotation about its axis and having gear teeth about its circumference to form a sun gear; a housing surrounding and supporting said drive member and having a flexible inner circumferential surface disposed at a varying distance from said generally cylindrical drive member so as to form a pumping chamber therebetween said inner surface having gear teeth thereon to form a ring gear; inlet and outlet passageways in communication with said pumping chamber; a plurality of generally rigid rolling members held between said drive member and said inner circumferential surface adapted to be rolled by said drive member about said inner surface and carry fluid through said pumping chamber from said inlet ports to said outlet ports said rolling members having gear teeth about their circumference to form planetary gears.
Claim 4
Dependent Claim
140 words
A fluid pump comprising: a generally cylindrical drive member adapted for rotation about its axis and having gear teeth about its circumference to form a sun gear; a housing surrounding and supporting said drive member and having a flexible inner circumferential surface disposed at a varying distance from said generally cylindrical drive member so as to form a pumping chamber therebetween said inner surface having gear teeth thereon to form a ring gear; inlet and outlet passageways in communication with said pumping chamber; a plurality of generally rigid rolling members held between said drive member and said inner circumferential surface adapted to be rolled by said drive member about said inner surface and carry fluid through said pumping chamber from said inlet ports to said outlet ports said rolling members having gear teeth about their circumference to form planetary gears.
Claim 5
Dependent Claim
43 words
The apparatus of claim 1 in which said inner surface has portions of constant radius about axes coincident with the axis of rotation of said sun gear and ramp portions shaped to narrow said pumping chamber and connect together the constant radius portions.
Claim 6
Dependent Claim
21 words
The apparatus of claim 2 in which there are a plurality of constant radius portions and a plurality of ramp portions.
Claim 7
Dependent Claim
19 words
The apparatus of claim 3 in which said ring gear also has rigid portions interspersed in the flexible surface.
Claim 8
Dependent Claim
29 words
The apparatus of claim 4 including voids formed in the flexible portions of the ring gear, said voids being in communication with one of the inlet and outlet ports.
Claim 9
Dependent Claim
21 words
The apparatus of claim 5 in which said inlet and outlet passageways communicate with the pumping chamber proximate said ramp portions.
References Cited (Backward Citations)
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US2530767A
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US3039398A
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US2988003A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-10 | 1978-09-09 | 1979-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-10 | 1982-09-09 | 1983-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-10 | 1986-09-09 | 1987-03-11 | $7700.00 | Window Closed / Lapsed |