Rotary pump device having seal mechanism which includes resin member and reinforcing ring in hollow portion of resin member
US8678798B2 · kind B2 · utility
3Cited by
4References
6Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Aug 29, 2011 |
| Grant date | Mar 25, 2014 |
| Priority date | — |
| Expiry date | Jun 1, 2032 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04C2/10
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A rotary pump device is provided in which a drive shaft is inserted into a center hole of a cylinder that forms rotor chambers, and into outer rotors and inner rotors of rotary pumps. In the rotary pump device, seal mechanisms that include hollow-shaped resin members and annular rubber members are arranged on an opposite side to the cylinder with respect to the rotary pumps. Metal rings are arranged in hollow portions of the resin members in the seal mechanisms so that the drive shaft is inserted into an inner periphery of the metal rings with a minimum clearance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.