B - Operations – Transporting – 60 – T
Patent
B - Operations, Transporting
60
T
303/3, 303/36
B60T 13/38 (2006.01) B60T 8/18 (2006.01) B60T 13/26 (2006.01) B60T 13/66 (2006.01) B60T 13/74 (2006.01)
Patent
CA 1064549
DYNAMIC BLENDING WITH A SPRING-APPLIED FLUID PRESSURE RELEASED SERVICE BRAKE INCLUDING COJOINT SPRING AND FLUID PRESSURE EMERGENCY FEATURE ABSTRACT OF THE DISCLOSURE This invention relates to a vehicle brake apparatus wherein a service brake application is effected by a spring in response to the reduction of the pressure of fluid in a first chamber on one side of a brake-applying piston, and an emergency brake application is effected by the establishment of a fluid pressure in a second chamber on the other side of this piston whereby this other side of the piston is subject simultaneously to both the fluid pressure force thus established and the force of the above-mentioned spring. A brake control valve device that includes a pair of self-lapping valve devices which respectively control the degree of reduction of the pressure of the fluid in the first chamber and the degree of pressure of fluid established in the second chamber, also comprises a spring-biased lever having a fulcrum adjustable according to the load on the vehicle and an operator-controlled means for rendering the spring-biased lever operable to so effect operation of the pair of self- lapping valve devices as to selectively effect a service or an emergency brake application and a subsequent brake release.
290767
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