Fluid-pressure and analogous brake systems – Pipeless valves
Patent
1989-09-13
1991-02-05
Reger, Duane A.
Fluid-pressure and analogous brake systems
Pipeless valves
303107, B60T 712
Patent
active
049899210
ABSTRACT:
There is described a hydraulic friction brake for controlling deceleration of a mine hoist which brake includes a pump continually circulating hydraulic braking fluid through a valve. The valve regulates the flow of hydraulic fluid to control braking pressure applied by the brake to brake the mine hoist. The hydraulic friction brake includes a controller for controlling operation of the valve. The controller a comparator for comparing a differentiated signal indicative of hoist speed with the reference signal indicative of a predetermined hoist deceleration to provide a switching output signal having a first output value when the differentiated signal is greater than the reference signal and having a second value when the differentiated signal is less than or equal to the reference signal. The control means also includes an integrator responsive to the output signal to provide a first valve signal that controls the operation of the valve. By integrating the switching output signal it is possible to provide a valve control signal that opens the valve at a rate predetermined and thereby reduce the braking pressure of the brake in proportion to the deceleration of the hoist. Further, when the output signal is indicative of a maximum allowable deceleration rate for the hoist, the integrator provides a constant output signal which maintains the opening of the valve constant. As a result a maximum braking acceleration for the hoist is not exceeded.
REFERENCES:
patent: 3498682 (1970-03-01), Mueller et al.
patent: 3547501 (1970-12-01), Harned et al.
patent: 3586387 (1971-06-01), Riordan
patent: 3776357 (1973-12-01), Arai et al.
patent: 3794972 (1974-02-01), Van Ostrom
patent: 4324387 (1982-04-01), Steinhagen
General Electric Canada Inc.
Reger Duane A.
LandOfFree
Mine hoist brake regulator does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Mine hoist brake regulator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Mine hoist brake regulator will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-5575