Motor-type fuel pump for vehicle
US6739850B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Oct 21, 2002 |
| Grant date | May 25, 2004 |
| Priority date | — |
| Expiry date | Oct 21, 2022 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04C2/088
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
At a boundary area between a high-pressure portion in which a discharge port of a fuel pump is disposed and a low-pressure portion in which an intake port is disposed, a pressure relief groove extending along the boundary area is formed so as to be communicated with the outside of the pump by pressure relief hole. Alternatively, a slit is formed communicated with the outside. Accordingly, a fuel at a high-pressure area portion can be drained with reliability. Further, by communicating the above pressure relief groove with a positioning pin insertion port, a single hole can serve both as a positioning pin insertion hole and a pressure relief hole.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.