B - Operations – Transporting – 60 – T
Patent
B - Operations, Transporting
60
T
303/1, 188/2
B60T 1/00 (2006.01) F16D 55/224 (2006.01) F16D 65/14 (2006.01) F16D 65/32 (2006.01)
Patent
CA 1222270
BRAKE ACTUATING SYSTEM ABSTRACT OF THE DISCLOSURE A brake actuating system for use with a brake assembly having a body, a brake actuator and at least one friction member cooperating with the actuator and the body to brake a brakeable member. The invention provides a system with improved operator "feel" of braking force, and has a first fluid valve receiving pressurized fluid and controlling actuation of the actuator, with a signal input adapted to receive a signal from an operator and to be responsive to extension of the actuator. In this way, a change in brake signal from the operator produces a corresponding change of extension of the actuator which produces a corresponding change in fluid output signal to the actuator. In a first embodiment, a second fluid valve has an input receiving pressurized fluid, an output port adapted to communicate with the actuator fluid input, and a pilot pressure input port communicating with the fluid output of the first valve such that a change in pilot pressure from the first valve as a result of change in brake signal from an operator changes the output from the second valve and also changes the input signal to the brake actuator. In a second embodiment, an alternative first fluid valve only is used and the fluid output means therefrom communicates directly with fluid input means of the actuator. Further alternative embodiments reduce effects of friction in a control cable by providing a direct feedback of actuator force on a control lever, and also permit locking of the lever.
449265
Carver & Company
Kobelt Jacob
LandOfFree
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