Vent valve for electropneumatic brake control valve
AssigneeNew York Air Brake Corporation
InventorsRonald O. Newton, Steven R. Newton
Life of this patent
Estimating the term…
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 in shot valve and an accelerated application valve.
Claims28
A vent valve to be used with a brake control valve having a pipe bracket with an emergency portion interface, the vent valve comprising:
- an emergency portion body with an interface configured to be mated with the emergency portion interface of the pipe bracket, the interface including first and second brake pipe ports and a volume port;
- a vent valve selectively connecting the first brake pipe port to a vent port on the body;
- a vent piston controlling the vent valve, the vent piston including a first side connected to the volume port and a second side;
- a discharge valve selectively connecting the second side of the vent piston to either the vent port or the volume port;
- an emergency piston controlling the discharge valve, the emergency piston including a first side connected to the volume port and a second side connected to the second brake pipe port;
- and
- the body not including at least one of an inshot valve and an accelerated application valve.
A vent valve to be used with a brake control valve having a pipe bracket with an emergency portion interface, the vent valve comprising:
- an emergency portion body with an interface configured to be mated with the emergency portion interface of the pipe bracket, the interface including first and second brake pipe ports and a volume port;
- the body including a casting with at least one cover, the casting including all the cast cavities and passages for an emergency portion;
- a vent valve selectively connecting the first brake pipe port to a vent port on the body;
- a vent piston controlling the vent valve, the vent piston including a first side connected to the volume port and a second side;
- a discharge valve selectively connecting the second side of the vent piston to either the vent port or the volume port;
- an emergency piston controlling the discharge valve, the emergency piston including a first side connected to the volume port and a second side connected to the second brake pipe port;
- and
- the cover for the vent valve piston including only a passage connecting the first side of the vent piston to the volume port.
A vent valve to be used with a brake control valve having a pipe bracket with an emergency portion interface, the vent valve comprising:
- an emergency portion body with an interface configured to be mated with the emergency portion interface of the pipe bracket, the interface including first and second brake pipe ports and a volume port;
- the body including a casting with at least one cover, the casting including all the cast cavities and passages for an emergency portion;
- a vent valve selectively connecting the first brake pipe port to a vent port on the body;
- a vent piston controlling the vent valve, the vent piston including a first side connected to the volume port and a second side;
- a discharge valve selectively connecting the second side of the vent piston to either the vent port or the volume port;
- an emergency piston controlling the discharge valve, the emergency piston including a first side connected to the volume port and a second side connected to the second brake pipe port;
- and
- a cavity for an accelerated application valve in the casting remains plugged.
An electro-pneumatic brake for a rail vehicle including a pipe brake with an emergency interface and a service interface, an electropneumatic car brake control device mounted on the service interface and a vent valve on the emergency interface, the vent valve comprising:
- an emergency portion body with an interface mated with the emergency portion interface of the pipe bracket, the interface including first and second brake pipe ports and a volume port;
- the body including a casting with at least one cover, the casting including all the cast cavities and passages for an emergency portion;
- a vent valve selectively connecting the first brake pipe port to a vent port on the body;
- a vent piston controlling the vent valve, the vent piston including a first side connected to the volume port and a second side;
- a discharge valve selectively connecting the second side of the vent piston to either the vent port or the volume port;
- an emergency piston controlling the discharge valve, the emergency piston including a first side connected to the volume port and a second side connected to the second brake pipe port;
- and
- the body not including at least one of an inshot valve and an accelerated application valve.
A method of converting an emergency brake valve portion which includes an emergency portion body with an interface to be mated with the emergency portion interface of the pipe bracket;
- the body including a casting with at least one cover, the casting including all the cast cavities and passages for an emergency portion;
- a vent valve selectively connecting a first brake pipe port to a vent port on the body;
- a vent piston controlling the vent valve;
- a discharge valve pneumatically controlling the vent piston;
- an emergency piston responsive to brake pipe pressure for controlling the discharge valve;
- an inshot valve connected to a brake cylinder port, an accelerated application valve connecting a second brake pipe port to the vent port, the method comprising the steps of:
- removing at least one of an inshot valve and an accelerated application valve;
- and
- plugging its cavity.
Dependencies are inferred from the claim text.