B - Operations – Transporting – 60 – T
Patent
B - Operations, Transporting
60
T
303/87
B60T 11/28 (2006.01) B60T 8/26 (2006.01) B60T 11/16 (2006.01) B60T 17/22 (2006.01)
Patent
CA 1037523
MODULAR PROPORTIONER Abstract of the Disclosure: A combination proportioner and a shuttle piston which when moved actuates a brake pressure loss warning switch. proportioner piston has a spring preload which must be overcome by rear brake supply pressure before the proportioner is actuated. Upon brake release the lips of the switch actuating piston proportioner seal act as a valve to relieve rear brake pressure to the pressure at which the proportioner began to operate. The proportioner is deactivated upon front brake system pressure loss. The proportioner mechanism is so assembled that it can be utilized as an original installation or as a replacement module. In an installation where no proportioning action is required, the shuttle piston and head nut are installed without a proportioning valve. When a proportioning valve is required, a head nut with the proportioning mechanism preassembled therein is installed.
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