192 clutches and power-stop control – Vortex-flow drive and clutch – With brake
Patent
1978-04-10
1981-01-06
Herrmann, Allan D.
192 clutches and power-stop control
Vortex-flow drive and clutch
With brake
B60K 4120
Patent
active
042431263
ABSTRACT:
A motor drives a pump to provide fluid under pressure in a closed hydraulic circuit through a pilot valve to a change speed clutch valve and a directional valve of a multi-speed transmission for an electrically powered vehicle, such as a mine haulage vehicle. The multi-speed transmission is connected by an output shaft to the driven wheels of the vehicle. A braking force is applied to the driven wheels by a hydraulically operated service brake to effect routine stopping of the vehicle. Under emergency conditions an emergency brake applies a braking force to the driven wheels by operation of a panic bar positioned in the operator's compartment. A brake valve connected to the panic bar maintains a preselected fluid pressure in the hydraulic circuit of the emergency brake to retain the brake in a released position. The hydraulic circuit is interlocked through the pilot valve to the transmission clutch and direction valves. Depressing the panic bar actuates the brake valve to release the emergency brake and simultaneously actuate the pilot valve to interrupt fluid flow to the respective valves of the transmission. Transmission of power to the driven wheels is terminated, and the vehicle is stopped. Actuation of the panic bar also opens the main contactors of the electrical controller that supplies electrical power to the traction motors. Upon application of the emergency brake, the traction motors must be restarted before the vehicle can be moved, and a lever of the brake valve must be shifted from the park to run position. Thus, the emergency brake is confined to emergency use only and is not to be used as a service brake to provide less wear to preserve the emergency brake for emergency use.
REFERENCES:
patent: 837022 (1906-11-01), Woods
patent: 1138287 (1915-05-01), Hamlen
patent: 1644669 (1927-10-01), Dean
patent: 2200878 (1940-05-01), Farris
patent: 2690533 (1954-09-01), Marco
patent: 2968967 (1961-01-01), Ross, Jr.
patent: 3235042 (1966-02-01), Ulinski
patent: 3589484 (1971-06-01), Lammers et al.
patent: 3854559 (1974-12-01), Talak et al.
patent: 3978946 (1976-09-01), Ream
Coval Arthur B.
Lee Arthur L.
A. L. Lee Corporation
Adams John M.
Herrmann Allan D.
Price, Jr,. Stanley J.
LandOfFree
Brake system for a vehicle and method of operation thereof does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Brake system for a vehicle and method of operation thereof, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Brake system for a vehicle and method of operation thereof will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-280965