Brake control valve with AAV stability
US7980637B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 28, 2008 |
| Grant date | Jul 19, 2011 |
| Priority date | — |
| Expiry date | Aug 15, 2029 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T15/048
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A vent valve made from a standard emergency brake valve portion. It includes an emergency portion body with an interface to be mated with the emergency portion interface of the pipe bracket. The body includes a casting with at least one cover and the casting including all the cast cavities and passages for an emergency portion. A vent valve selectively connects a first brake pipe port to a vent port on the body, A vent piston controls the vent valve and a discharge valve pneumatically controls the vent piston. An emergency piston is responsive to brake pipe pressure for controlling the discharge valve. The body does not include at least one of an inshot valve and an accelerated application valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.