Unidirectional stability choke for a brake control valve
AssigneeNew York Air Brake Corporation
InventorsEric C. Wright, Robert P. Gayfer
Life of this patent
Estimating the term…
Abstract
A service portion of a rail pneumatic brake control valve which includes a piston responsive to pressure differential between brake pipe pressure at a brake pipe port and reservoir pressure at a reservoir port and a first valve controlled by the piston to determine pressure in a brake cylinder for a service application. A stability choke and check valve are connected in series between the brake pipe port and the reservoir port. The check valve permits flow from the brake pipe port to the reservoir port and prevents flow from the reservoir port to the brake pipe port independent of the piston.
Claims14
A service portion of a rail pneumatic brake control valve comprising:
- a piston responsive to pressure differential between brake pipe pressure at a brake pipe port and reservoir pressure at a reservoir port;
- a first valve controlled by the piston to determine pressure in a brake cylinder for a service application;
- a stability choke connected between the brake pipe port and the reservoir port;
- and
- a check valve in series with the stability choke for permitting flow from the brake pipe port to the reservoir port and preventing flow from the reservoir port to the brake pipe port independent of the piston.
A rail pneumatic brake control valve including a service portion, the service portion comprising:
- a piston responsive to pressure differential between brake pipe pressure at a brake pipe port and reservoir pressure at a reservoir port;
- a first valve controlled by the piston to determine pressure in a brake cylinder for a service application;
- a stability choke connected between the brake pipe port and the reservoir port;
- and
- a check valve in series with the stability choke for permitting flow from the brake pipe port to the reservoir port and preventing flow from the reservoir port to the brake pipe port independent of the piston.
Dependencies are inferred from the claim text.