Automotive fuel pump
US5173037A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 9, 1991 |
| Grant date | Dec 22, 1992 |
| Priority date | — |
| Expiry date | Dec 9, 2011 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF05B2240/52
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An automotive fuel pump has a tubular shell, a pump group in the shell, an end housing in the shell, and an electric motor in the shell including an armature shaft. The armature shaft has an integral annular first spherical shoulder engaging a seat of a first bearing on a partition wall of the pump group. The first bearing reacts axial thrust and radial bearing forces between the partition wall and the armature shaft and supports the armature shaft on the partition wall for rotation about the centerline of the shaft and for universal pivotal movement about the center of the first spherical shoulder. The armature shaft has an integral second spherical shoulder received in a cylindrical bearing seat of a second bearing on the end housing. The second bearing reacts only radial bearing forces between the armature shaft and the end housing in plane perpendicular to the centerline of the bearing seat whereby the armature shaft is supported on the end housing for rotation about the centerline of the armature shaft regardless of whether the centerline of the armature shaft coincides with the centerline of the cylindrical bearing seat.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.