Roots type pump with pin connection for plastic coated rotor
US4764098A · kind A · utility
12Cited by
4References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 26, 1986 |
| Grant date | Aug 16, 1988 |
| Priority date | — |
| Expiry date | Jun 26, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T403/7088
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A Roots type pump comprising a pair of mating lobed rotors which are supported by rotor shafts, respectively. Each rotor is fixed to the corresponding rotor shaft by a pin forcibly inserted in a through hole provided through the rotor and rotor shaft. The outer surface of each rotor is surrounded by a coating layer of plastic material, at which the through hole has end openings having cross sectional dimensions greater than that of the substantial part of the through hole.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.