Brake valve for use in load sensing hydraulic system

Details Brake valve for use in load sensing hydraulic system Brake valve for use in load sensing hydraulic system

1991-08-15

1993-01-19

Kwon, John T.

Power plants

Pressure fluid source and motor

Manual pump pressurizes fluid to position output motor...

60402, 60421, 60422, 60427, 91514, 91516, 91517, 91532, F16D 3102

Patent

active

051798352

ABSTRACT:
A brake valve (45) is disclosed of the type which permits communication from a source (11) of pressurized fluid to a brake actuator (47) in response to manual movement of a valve spool (57) from a neutral position (FIG. 2) to a power brake position (FIG. 5). In the power brake position, the valve spool permits fluid communication between a work port (53), which communicates with a brake actuator, and a brake load signal chamber (87), the brake load signal controlling the fluid output of the source. As the valve spool moves toward a manual brake position (FIG. 6) communication between the work port and the brake load signal chamber is blocked. In the manual brake position, movement of the valve spool causes a large piston (63) to displace fluid from its piston bore (73) into a piston bore (75) in which is disposed a small piston (61), the small piston being operable in response to movement of the valve spool to build brake pressure in the work port (53). A relief valve arrangement (137,139,141) relieves fluid pressure in the larger piston bore (73) to limit the manual force required to move the valve spool and the pistons.

REFERENCES:
patent: 2945352 (1960-07-01), Stelzer
patent: 3166890 (1965-01-01), Krehbiel
patent: 4043419 (1977-08-01), Larson et al.
patent: 4044786 (1977-08-01), Yip
patent: 4253382 (1981-03-01), Yip
patent: 4418710 (1983-12-01), Johnson
patent: 4663936 (1987-05-01), Morgan
patent: 4977928 (1990-12-01), Smith et al.

Affiliated with

Also associated with

Rating

Brake valve for use in load sensing hydraulic system 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 valve for use in load sensing hydraulic system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Brake valve for use in load sensing hydraulic system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-97303