US3697190A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Truncated conical drag pump
Assignee: Individual
•
Filing: 1970-11-03
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Granted: 1972-10-10
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Expires: 1990-11-03
Abstract
Abstract High pressure low volume rate drag pump having a frusto-conical rotor cooperating with a frusto-conical stator wall and having close clearance with the stator wall. The rotor has a helical channel extending therealong, in which the base or root of the channel is formed along a different angle than the cone angle of the rotor. The high pressure is attained by the maximum drag surface along the relatively small passageways together with the centrifugal force of the fluid due to increasing linear velocity of the rotor from its inlet to its discharge end. The rotor is axially adjustable to maintain a close clearance and a high pressure capability of the pump.
Inventors
- 👤 Walter D Haentjens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:10
CPC Classifications
F; F04; F04D; F04D3/00; F04D3/02; F05; F05B; F05B2250/00; F05B2250/20; F05B2250/23; F05B2250/232
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
258 words
A drag pump comprising: a housing having an interior frusto-conical wall portion, an inlet into said housing opening to the small diameter end of said frusto-conical wall portion, an outlet leading from said housing and having communication with the large diameter end of the frusto-conical wall portion thereof, a rotor rotatably journalled within said housing and having a conical wall portion extending at the same angle as the interior conical wall portion of said housing, a shaft for said rotor, bearings for said shaft at opposite ends of said housing, journalling said shaft and rotor for rotation about an axis extending longitudinally of said housing, means mounting said shaft on said bearings for axial adjustable movement therealong, accommodating adjustment of said shaft and rotor relative to said interior frusto-conical wall, to maintain a predetermined radial clearance between said rotor and internal frusto-conical wall for the length of the frustoconical wall of said rotor, said rotor having at least one constant widtH helical channel extending along the conical wall portion thereof from the inlet to the outlet end thereof, the base of said channel extending along a uniform thread angle at a different angle than the angle of said conical wall portion and converging toward said conical wall portion at the large diameter end of said rotor, and thereby varying in cross section from the inlet to the outlet end of said rotor according to the radius of said rotor, to maintain a constant fluid drag as the fluid progresses from the inlet to the outlet of said rotor.
Claim 2
Dependent Claim
258 words
A drag pump comprising: a housing having an interior frusto-conical wall portion, an inlet into said housing opening to the small diameter end of said frusto-conical wall portion, an outlet leading from said housing and having communication with the large diameter end of the frusto-conical wall portion thereof, a rotor rotatably journalled within said housing and having a conical wall portion extending at the same angle as the interior conical wall portion of said housing, a shaft for said rotor, bearings for said shaft at opposite ends of said housing, journalling said shaft and rotor for rotation about an axis extending longitudinally of said housing, means mounting said shaft on said bearings for axial adjustable movement therealong, accommodating adjustment of said shaft and rotor relative to said interior frusto-conical wall, to maintain a predetermined radial clearance between said rotor and internal frusto-conical wall for the length of the frustoconical wall of said rotor, said rotor having at least one constant widtH helical channel extending along the conical wall portion thereof from the inlet to the outlet end thereof, the base of said channel extending along a uniform thread angle at a different angle than the angle of said conical wall portion and converging toward said conical wall portion at the large diameter end of said rotor, and thereby varying in cross section from the inlet to the outlet end of said rotor according to the radius of said rotor, to maintain a constant fluid drag as the fluid progresses from the inlet to the outlet of said rotor.
Claim 3
Dependent Claim
82 words
The drag pump of claim 1, wherein the means mounting said shaft on said bearings comprise sleeves secured to said bearings and held from axial movement thereby, a keyed connection between said shaft and one of said sleeves for rotating said sleeve with said shaft, and an adjustable connection between the opposite end of said shaft and its associated sleeve accommodating axial adjustment of said shaft relative to said sleeve to take up clearance between said stator and said interior frusto-conical wall.
Claim 4
Dependent Claim
36 words
The drag pump of claim 2, wherein the adjustable connection between one sleeve on said shaft comprises a threaded connection, and wherein means are provided for locking said shaft in adjusted relation relative to said sleeve.
Claim 5
Dependent Claim
63 words
The drag pump of claim 1, wherein two continuous helical channels spaced 180* apart extend along said rotor from the inlet to the outlet end thereof to effect a balance of the changes in pressure as fluid progresses along said channels, and wherein the channels are of a constant width and decreasing depth as they progress to the outlet end of said rotor.
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) | 1975-10-10 | 1976-04-10 | 1976-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-10 | 1980-04-10 | 1980-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-10 | 1984-04-10 | 1984-10-10 | $7700.00 | Window Closed / Lapsed |