Fluid-pressure and analogous brake systems – Load control – Empty and load type
Patent
1999-04-28
2000-02-22
Butler, Douglas C.
Fluid-pressure and analogous brake systems
Load control
Empty and load type
188195, 303 223, B60T 818
Patent
active
060271809
ABSTRACT:
A manual shifting apparatus for an automatic empty/load brake device used in conjunction with a pneumatic braking system provided on a transport vehicle having a truck and a car body mounted thereon through a resilient suspension system. The automatic empty/load brake device has a sensor arm which moves through a range of positions upon the application of a braking force to the transport vehicle by the pneumatic braking system. The range of positions includes a first range of positions indicating the transport vehicle as being in a loaded condition and a second range of positions indicating the transport vehicle as being in an unloaded condition. The automatic empty/load brake device applies a substantially reduced pneumatic braking force to the transport vehicle whenever the sensor arm is in the second range of positions. The manual shifting apparatus is adapted for mounting on the transport vehicle adjacent the automatic empty/load brake device and includes a manual shifting member movable between a first disposition and a second disposition. In the first disposition, the manual shifting member confines the sensor arm of the automatic empty/load device to the first range of positions and excludes the sensor arm from travel into the second range of positions. In the second disposition, the manual shifting member permits the sensor arm of the automatic empty/load device to travel into the second range of positions.
REFERENCES:
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patent: 4824179 (1989-04-01), Rees
patent: 5106168 (1992-04-01), McKay
patent: 5269595 (1993-12-01), McKay et al.
patent: 5303987 (1994-04-01), McKay
Greenaway William G.
Lewis Roger V.
Zemyan James M.
Butler Douglas C.
Westinghouse Air Brake Company
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