Valve unit for modulating pressure in a compressed-air brake system
US10471942B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 7, 2016 |
| Grant date | Nov 12, 2019 |
| Priority date | — |
| Expiry date | Nov 7, 2036 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T8/5037
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A valve unit for modulating pressure in a compressed-air brake system comprises an inlet valve (6) and an outlet valve (7) configured as diaphragm valves, a brake pressure output (4) configured to be connected to or shut off from a brake pressure input (3) or a vent output (5), two pilot valves (8, 9) configured as 3/2-way solenoid valves, and a respective control chamber (31, 32) adjacent to the diaphragm (17, 18) of the diaphragm valves (6, 7). The diaphragms (17, 18) are each clamped between two housing parts (11, 14; 11′, 14′) via a respective ring bead (22, 23) placed in a housing-side ring groove (20, 21; 20′, 21′). In order to avoid damaging the diaphragms (17, 18), an annular continuous or partially interrupted recess (54) is arranged in the ring groove (20, 21) or immediately adjacent to the ring groove to receive displaced bead material from the diaphragm (17).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.