Conical logarithmic spiral viscosity pump
US5312224A · kind A · utility
142Cited by
20References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 12, 1993 |
| Grant date | May 17, 1994 |
| Priority date | — |
| Expiry date | Mar 12, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49245
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A rotary viscosity pump is provided that has a housing and an impeller. The housing has a conical chamber with an outlet at a narrow end of the chamber. The impeller has a conical section with a logarithmic spiral groove along its exterior. The spacing between the housing and the impeller can have either a constant gap or a gap that decreases along the length of the impeller. The depth of the groove can be constant, increase, or decrease in depth along the length of the impeller.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.