초록 ▼

Apparatus (1) for automatically releasing a railroad car hand brake (HB) normally maintained in its applied position. An air pressure activated cylinder (9) acts on a hand brake release (5) to release the hand brake. An air line (13) directs pressurized air from a pressurized air source to the air c

Apparatus (1) for automatically releasing a railroad car hand brake (HB) normally maintained in its applied position. An air pressure activated cylinder (9) acts on a hand brake release (5) to release the hand brake. An air line (13) directs pressurized air from a pressurized air source to the air cylinder. A valve (27) connected in the air line is responsive to the source air pressure. The valve is normally closed but opens when source air pressure reaches a level sufficient to release the air brakes on the car. A draft load sensor (29) is positioned in the air line between the valve and air cylinder. The sensor normally blocks the air line, but unblocks it when a sufficiently great draft load is sensed. The hand brake is released only if source air pressure is sufficiently high and the draft load on the railroad car is sufficiently great.

대표청구항 ▼

Apparatus for automatically releasing a railroad car hand brake comprising: hand brake release means normally maintaining the hand brake in its applied position; air pressure activated means acting on the release means to force the release means to release the hand brake; an air conduit directing pr

Apparatus for automatically releasing a railroad car hand brake comprising: hand brake release means normally maintaining the hand brake in its applied position; air pressure activated means acting on the release means to force the release means to release the hand brake; an air conduit directing pressurized air from a pressurized air source to the air pressure activated means; valve means connected in the air line and responsive to the source air pressure, the valve means being normally closed, but opening when the source air pressure reaches a level sufficient to release the air brakes on the car; and draft load sensing means positioned in the air line between the valve means and the air pressure activated means, the draft load sensing means normally blocking the air line, but unblocking it when a sufficiently great draft load is sensed so the air pressure activated means can force the release means to release the hand brake whereby the hand brake is released only if source air pressure is sufficiently high and the draft load on the railroad car is sufficiently great.