Rotation mechanism and internal unit of rotation mechanism
US10077783B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 25, 2012 |
| Grant date | Sep 18, 2018 |
| Priority date | — |
| Expiry date | Apr 14, 2034 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF05D2230/68
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A rotation mechanism includes a casing with an upper half portion and a lower half portion; and an internal unit disposed in the casing with a rotor rotating around an axis thereof. Additionally, a bearing portion rotatably supports the rotor, and an annular seal portion seals a gap surrounding a circumferential surface of the rotor. An axial movement restricting portion includes a fitting concave portion on one of the casing and the internal unit, and a fitting convex portion to be fitted into the fitting concave portion as a pair, which restricts relative movement between the casing and the internal unit in a direction of axis. A tapered surface is formed on the fitting concave portion and the fitting convex portion and a width thereof in the direction of axis increases toward an inner circumferential side in a radial direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.