Patent US3582235A successfully refreshed from Google Patents.
US3582235A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary pump
Assignee: Individual
•
Filing: 1969-11-05
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Granted: 1971-06-01
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Expires: 1989-11-05
Abstract
Abstract This invention relates to a pump for delivering a fluid between a casing and a rotor thereof to the discharge side of the casing by rotating the rotor, more particularly relates to a rotary pump operable as a species of eccentric pump, wherein the rotor or impeller having radially extended flexible vanes, is arranged eccentrically in the impeller chamber in such a manner that the outer edges of the vanes are in sliding engagement with the peripheral surface of the impeller chamber of the casing, whereby the flexible vanes are, upon rotation of the rotor, progressively curved to pump up the liquid from the intake side to the discharge side of the machine.
Inventors
- 👤 Heijiro Ito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:18
CPC Classifications
F; F04; F04C; F04C11/00; F04C11/005; F04C5/00; F04D; F04D3/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
108 words
In a rotary pump wherein an impeller chamber communicating with an intake port and a discharge port is provided in a casing having said intake and discharge port; a transmission mechanism, a rotary impeller having rubber-made resilient vanes eccentrically rotatably arranged in said impeller chamber so that the outer edges of said vanes are in frictional engagement with the inner wall of said chamber; and an axial flow impeller for applying pressure to the fluid disposed rotationally in a fluid passage between said impeller chamber and said discharge port, said axial impeller being driven through said transmission mechanisms at a higher speed than that of said rotary impeller.
Claim 2
Dependent Claim
108 words
In a rotary pump wherein an impeller chamber communicating with an intake port and a discharge port is provided in a casing having said intake and discharge port; a transmission mechanism, a rotary impeller having rubber-made resilient vanes eccentrically rotatably arranged in said impeller chamber so that the outer edges of said vanes are in frictional engagement with the inner wall of said chamber; and an axial flow impeller for applying pressure to the fluid disposed rotationally in a fluid passage between said impeller chamber and said discharge port, said axial impeller being driven through said transmission mechanisms at a higher speed than that of said rotary impeller.
Claim 3
Dependent Claim
167 words
In a rotary pump wherein a pump casing having an intake port and a discharge port arranged in parallel relation to each other is provided with an impeller chamber communicating with said intake and discharge ports; a transmission mechanism, an impeller having radially extended resilient vanes is arrange eccentrically rotatably in said impeller chamber so that the outer edges of said impeller are in frictionally sliding engagement with the inner wall of said impeller chamber; a fluid passage provided in parallel with said impeller chamber, said fluid passage being connected to said impeller chamber in a fluid communication manner through a communicating passage so that the fluid delivered from said impeller chamber undergoes a directional change in reverse direction and flows towards the discharge port through said fluid passage; an axial flow impeller for applying pressure to the fluid is disposed rotatably in said fluid passage in parallel with said rotary impeller; and said transmission mechanisms simultaneously driving said both impellers from a common drive power source.
Claim 4
Dependent Claim
167 words
In a rotary pump wherein a pump casing having an intake port and a discharge port arranged in parallel relation to each other is provided with an impeller chamber communicating with said intake and discharge ports; a transmission mechanism, an impeller having radially extended resilient vanes is arrange eccentrically rotatably in said impeller chamber so that the outer edges of said impeller are in frictionally sliding engagement with the inner wall of said impeller chamber; a fluid passage provided in parallel with said impeller chamber, said fluid passage being connected to said impeller chamber in a fluid communication manner through a communicating passage so that the fluid delivered from said impeller chamber undergoes a directional change in reverse direction and flows towards the discharge port through said fluid passage; an axial flow impeller for applying pressure to the fluid is disposed rotatably in said fluid passage in parallel with said rotary impeller; and said transmission mechanisms simultaneously driving said both impellers from a common drive power source.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |