B - Operations – Transporting – 60 – T
Patent
B - Operations, Transporting
60
T
303/66
B60T 17/00 (2006.01) B60T 8/18 (2006.01) B60T 15/18 (2006.01) B60T 15/42 (2006.01) B60T 15/54 (2006.01) B60T 17/10 (2006.01)
Patent
CA 1213634
ABSTRACT OF THE DISCLOSURE Brake apparatus for a railway vehicle including a brake cylinder device of the type having a pair of interconnected pistons of unequal size to which the vehicle brake rigging is connected. The larger power piston forms an application cham- ber and a release chamber on its opposite sides in which air is stored for use in controlling the vehicle brakes. The brake apparatus further includes a control valve device that is operative responsive to a reduction of brake pipe pressure to conduct flow of air from the release chamber to a position- ing chamber formed on the side of the smaller positioning piston corresponding to the side of the power piston having the application chamber, to effect movement of the inter- connected pistons to a brake application position. A transfer valve is actuated to connect this flow of air from the release chamber to atmosphere when the positioning chamber pressure exceeds, by a certain amount, a predetermined pressure at which the positioning piston is designed to move the power piston to application position. This certain amount by which the positioning chamber pressure is required to exceed the predetermined pressure, in order to actuate the transfer valve varies with the release chamber pressure effective at the time of a brake application.
410967
American Standard Inc.
Fetherstonhaugh & Co.
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