Traction control system for electric multiple units
US10480551B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 16, 2016 |
| Grant date | Nov 19, 2019 |
| Priority date | — |
| Expiry date | Apr 19, 2037 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K24/00
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention relates to an oil tank ventilation device for a hydraulic brake unit of a tramcar, comprising a vent plug, a sealing ring, a gas guide hole and a gas guide pipe; the gas guide hole is a through-hole structure arranged at an upper end inside an integrated valve block; the communications of electrical element protection case, integrated valve block and the oil tank are realized by the gas guide pipe stretched into an air chamber of the oil tank and by the vent plug configured in the electrical element protection case. When the surface of the oil tank is covered with ice or snow, the rain or snow can be effectively prevent from falling on the vent plug body and the driving safety of the train is ensured.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.