US3580550A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mixing apparatus
Assignee: Individual
•
Filing: 1968-06-13
•
Granted: 1971-05-25
•
Expires: 1988-06-13
Abstract
Abstract A bladed mixing rotor particularly for viscous liquids having plural radial blades projecting from a central hub. Each blade has a first recess in its lower surface adjacent the hub and a second recess in its top surface outwardly of the first recess. Two inclined pumping surfaces are thus formed on each blade, the pumping surfaces being reversely inclined.
Inventors
- 👤 Roy Hunnicutt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:31
CPC Classifications
B; B01; B01F; B01F27/00; B01F27/05; B01F27/07; B01F27/072; B01F27/0725; Y; Y10; Y10S; Y10S366/00; Y10S366/605
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
208 words
A mixing rotor for viscous liquids comprising a center hub portion adapted for connection to the rotating drive shaft normal to the plane of the rotor, and plural circumferentially spaced radial mixing blades carried by and extending from said hub portion, each mixing blade having a first recess in its lower surface immediately outwardly of the hub portion and forming on the blade an inclined face converging with the top face of the rotor to form a first leading edge portion on the blade, each blade having a second recess formed in its top surface radially outwaRdly of the first recess and producing a second inclined face reverse to the inclination of the first-named inclined face and converging with the lower surface of the rotor to produce a second leading edge portion on the blade radially outwardly of the first leading edge portion and offset therefrom by a distance substantially equal to the thickness of the rotor, the second leading edge portion of the blade extending substantially to the outer end of the blade, and projections on the outer tips of the rotor blades extending somewhat in advance of the second leading edge portions and said second recesses including curved wall portions which blend smoothly into said projections.
Claim 2
Dependent Claim
208 words
A mixing rotor for viscous liquids comprising a center hub portion adapted for connection to the rotating drive shaft normal to the plane of the rotor, and plural circumferentially spaced radial mixing blades carried by and extending from said hub portion, each mixing blade having a first recess in its lower surface immediately outwardly of the hub portion and forming on the blade an inclined face converging with the top face of the rotor to form a first leading edge portion on the blade, each blade having a second recess formed in its top surface radially outwaRdly of the first recess and producing a second inclined face reverse to the inclination of the first-named inclined face and converging with the lower surface of the rotor to produce a second leading edge portion on the blade radially outwardly of the first leading edge portion and offset therefrom by a distance substantially equal to the thickness of the rotor, the second leading edge portion of the blade extending substantially to the outer end of the blade, and projections on the outer tips of the rotor blades extending somewhat in advance of the second leading edge portions and said second recesses including curved wall portions which blend smoothly into said projections.
Claim 3
Dependent Claim
31 words
A mixing rotor as defined by claim 1, and terminal scraping edges on said projections normal to the opposite main surfaces of the rotor and extending entirely between said main surfaces.
Claim 4
Dependent Claim
37 words
A mixing rotor as defined by claim 1, and wherein the terminal ends of the mixing blades are curved substantially concentric with the center of the rotor, said curved ends constituting the exterior sides of said projections.
References Cited (Backward Citations)
US3365176A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |