Motor vehicles – Bodies
Patent
1976-11-12
1978-06-06
Schwadron, Martin P.
Motor vehicles
Bodies
55385B, 55419, 92 64, 92 78, B60T 700
Patent
active
040930386
ABSTRACT:
The invention relates to a spring brake assembly of the compressed air type for truck tractor types of vehicles. The brake actuators of the assembly each includes a heavy coil type emergency spring which is held in a compressed state on the back side of a diaphragm by compressed air applied to the front side of the diaphragm during operation of the vehicle. The emergency spring expands to actuate a brake setting push rod when the compressed air is vented from the front side of the diaphragm and this occurs when the vehicle engine is turned off or when there is an accidental loss of compressed air from the brake unit. The emergency spring is housed in a chamber and, due to the movement of the diaphragm, atmospheric air is continually being drawn into and expelled from that chamber. As the brake actuators are mounted on the rear axle of the vehicle, they are in low positions relative to the roadway and the air drawn into the emergency spring chambers thereof is laddened with salt and water. The emergency springs are thus subjected to corrosion which weakens them and ultimately causes them to break. A filter unit for air supplied to the brake actuators is on the chassis frame mounted behind the cab about three feet above the roadway. The filter unit is connected to the brake actuators with hoses.
REFERENCES:
patent: 2289043 (1942-07-01), Rockwell
patent: 2675093 (1954-04-01), McCall
patent: 2708920 (1955-05-01), Pasturczak
patent: 3494111 (1970-02-01), Hathaway
patent: 3641744 (1972-02-01), Culbert
patent: 3896706 (1975-07-01), Newstead
patent: 3906798 (1975-09-01), Dray
patent: 3977308 (1976-08-01), Swander, Jr.
patent: 4031814 (1977-06-01), Lukens
Danfoss A/S
Hershkovitz Abraham
Schwadron Martin P.
LandOfFree
Spring brake assembly does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Spring brake assembly, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spring brake assembly will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1487469