Exhaust brake valve
US4054156A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 24, 1975 |
| Grant date | Oct 18, 1977 |
| Priority date | — |
| Expiry date | Feb 24, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/8696
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An exhaust brake valve assembly structurally arranged to provide reliable operation with relatively quick response. The assembly includes a sliding gate valve member driven by a power actuator through a lost motion connection which generates a desirable impact force on the gate to overcome static frictional forces. The lost motion connection cooperates with a relief port in the gate to relieve peak pressure forces on the gate just prior to opening movement to additionally improve opening reliability and response. Still further, the actuator includes a spring return arrangement in which the force rate adjacent the closed gate position is substantially greater than the force rate at the open position so that adequate reserve return force is developed for opening while only a minimal spring force resists piston movement in the initial opening movement. A quick release valve is provided on the actuator to rapidly exhaust fluid from the working chamber of the actuator to develop a high level of kinetic energy during the lost motion period. The actuator is protected from extreme temperature by a heat barrier plate interposed between the valve housing and actuator. A piston rod of the act…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.