Master cylinder with U-shaped seal
US8109088B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 6, 2008 |
| Grant date | Feb 7, 2012 |
| Priority date | — |
| Expiry date | Nov 6, 2030 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T11/232
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
Our problem relates to a master cylinder with a U-shaped seal. Our goal is to avoid defective bleeding of hydraulic braking systems. The defects arise out of the fact that the vacuum causes the lips of the seal (21) to stick together and to stick against the wall (41). To achieve this, reliefs (42) will be created on one wall (44) of one lip (28) facing the other lip (27) and on the edge face (50) of this same lip. These reliefs will prevent the lips from sticking tightly to one another and to the wall facing the edge face of the lips. This lack of sticking will prevent a vacuum from being created between the two lips and between the edge face of the lips and the wall (41). As a result, the seal will be able to return to a position in which bleeding can be performed effectively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.