US5813837A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Axial-flow impeller for mixing liquids
Assignee: Shinko Pantec Co Ltd
•
Filing: 1996-10-17
•
Granted: 1998-09-29
•
Expires: 2016-10-17
Abstract
Abstract An axial-flow impeller having a maximum blade width less than 20% of the impeller diameter, the pitch angle at the radial position 0.6 is 12 DEG -22 DEG , the width at the tip end portion of the blade is 12-75% of the width at the radial position 0.6, the pitch angle at the tip end portion of the blade is 5 DEG -10 DEG smaller than the pitch angle at the radial position 0.6, the width at the root of the blade is 40% or more of the width at the radial position 0.6, and the pitch angle at the root of the blade is 25 DEG -50 DEG . An axial-flow impeller having a maximum width of the blade 20% or more of the impeller diameter, the radial position of the maximum width portion is 0.4-0.8, the pitch angle of the maximum width portion is 12 DEG -22 DEG , the width at the tip end portion of the blade is 12-75% of the maximum width, and the pitch angle at the tip end portion of the blade is 5 DEG -10 DEG smaller than the pitch angle at the maximum width portion, the width at the root of the blade is 40-100% of the maximum width, and the pitch angle at the root of the blade is 25 DEG -50 DEG .
Inventors
- 👤 Masafumi Yamamoto
- 👤 Yukimichi Okamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:48
CPC Classifications
B; B01; B01F; B01F35/00; B01F27/00; B01F27/05; B01F27/11; B01F27/113; Y; Y10; Y10S; Y10S416/00; Y10S416/05
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
260 words
An axial-flow impeller having a plurality of blades mounted on a shaft rotatably for mixing liquids, each of said blades including (1) a leading edge and a trailing edge with respect to the direction of rotation of said blades, (2) a radial position defined by the position in the radial direction when the impeller shaft center is designated as 0 and the blade tip end is designated as 1, (3) a blade width defined by the linear distance between said leading edge and said trailing edge at the same radial position from said shaft, (4) a pitch angle defined by the angle formed between the straight line used to define said blade width and a plane perpendicular to said shaft, (5) a blade root defined at a mounting joint between said blade and said shaft, and (6) a blade tip end portion at the radial end of said blade, each of said blades comprising: (a) the maximum blade width is less than 20% of the impeller diameter; (b) the pitch angle at the radial position 0.6 is 15°-20°; (c) the width at the blade tip end portion is 25-75% of the blade width at the radial position 0.6, and at the same time the pitch angle at the blade tip end portion is 5°-10° smaller than the pitch angle at the radial position 0.6; and (d) the blade width at the blade root is 40% or more of the blade width at the radial position 0.6, and at the same time the pitch angle at the blade root is 40°-45°.
Claim 2
Dependent Claim
260 words
An axial-flow impeller having a plurality of blades mounted on a shaft rotatably for mixing liquids, each of said blades including (1) a leading edge and a trailing edge with respect to the direction of rotation of said blades, (2) a radial position defined by the position in the radial direction when the impeller shaft center is designated as 0 and the blade tip end is designated as 1, (3) a blade width defined by the linear distance between said leading edge and said trailing edge at the same radial position from said shaft, (4) a pitch angle defined by the angle formed between the straight line used to define said blade width and a plane perpendicular to said shaft, (5) a blade root defined at a mounting joint between said blade and said shaft, and (6) a blade tip end portion at the radial end of said blade, each of said blades comprising: (a) the maximum blade width is less than 20% of the impeller diameter; (b) the pitch angle at the radial position 0.6 is 15°-20°; (c) the width at the blade tip end portion is 25-75% of the blade width at the radial position 0.6, and at the same time the pitch angle at the blade tip end portion is 5°-10° smaller than the pitch angle at the radial position 0.6; and (d) the blade width at the blade root is 40% or more of the blade width at the radial position 0.6, and at the same time the pitch angle at the blade root is 40°-45°.
Claim 3
Dependent Claim
270 words
An axial-flow impeller having a plurality of blades mounted on a shaft rotatably for mixing liquids, each of said blades including (1) a leading edge and a trailing edge with respect to the direction of rotation of said blades, (2) a radial position defined by the position in the radial direction when the impeller shaft center is designated as 0 and the blade tip end is designated as 1, (3) a blade width defined by the linear distance between said leading edge and said trailing edge at the same radial position from said shaft, (4) a pitch angle defined by the angle formed between the straight line used to define said blade width and a plane perpendicular to said shaft, (5) a blade root defined at a mounting joint between said blade and said shaft, and (6) a blade tip end portion at the radial end of said blade, each of said blades comprising: (a) the maximum blade width is 20% or more of the impeller diameter; (b) the radial position at the maximum blade width portion is 0.4-0.8, and at the same time the pitch angle at the maximum blade width portion is 15°-20°; (c) the width at the blade tip end portion is 25-75% of the maximum blade width, and at the same time the pitch angle at the blade tip end portion is 5°-10° smaller than the pitch angle at the maximum blade width portion; and (d) the blade width at the blade root is 40% or more of the maximum blade width, and at the same time the pitch angle at the blade root is 40°-45°.
Claim 4
Dependent Claim
270 words
An axial-flow impeller having a plurality of blades mounted on a shaft rotatably for mixing liquids, each of said blades including (1) a leading edge and a trailing edge with respect to the direction of rotation of said blades, (2) a radial position defined by the position in the radial direction when the impeller shaft center is designated as 0 and the blade tip end is designated as 1, (3) a blade width defined by the linear distance between said leading edge and said trailing edge at the same radial position from said shaft, (4) a pitch angle defined by the angle formed between the straight line used to define said blade width and a plane perpendicular to said shaft, (5) a blade root defined at a mounting joint between said blade and said shaft, and (6) a blade tip end portion at the radial end of said blade, each of said blades comprising: (a) the maximum blade width is 20% or more of the impeller diameter; (b) the radial position at the maximum blade width portion is 0.4-0.8, and at the same time the pitch angle at the maximum blade width portion is 15°-20°; (c) the width at the blade tip end portion is 25-75% of the maximum blade width, and at the same time the pitch angle at the blade tip end portion is 5°-10° smaller than the pitch angle at the maximum blade width portion; and (d) the blade width at the blade root is 40% or more of the maximum blade width, and at the same time the pitch angle at the blade root is 40°-45°.
References Cited (Backward Citations)
GB1454277A
Cited
US4222710A
Cited
US4468130A
Cited
US4569131A
Cited
EP0284929A1
Cited
DE3730423A1
Cited
US5052892A
Cited
EP0469302A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-09-28 | 2002-03-30 | 2002-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-09-28 | 2006-03-30 | 2006-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-09-28 | 2010-03-30 | 2010-09-29 | $7700.00 | Window Closed / Lapsed |