Brake cylinder having efficient air bleeding

Details Brake cylinder having efficient air bleeding Brake cylinder having efficient air bleeding

1995-01-20

1998-02-03

Oberleitner, Robert J.

Brakes

Operators

Fluid pressure

188364, B60T 1100

Patent

active

057134375

ABSTRACT:
A device and method to improve the bleeding of air from a brake cylinder usable in a drum brake. A first cylinder cavity 3 and a second cylinder cavity 4 are bored in the upper and lower sections respectively of the cylinder body 2, and a first piston 31 and a second piston 41 are housed to stroke within said cylinder cavity 3 and cylinder cavity 4 respectively, wherein piston 31 and a partition 21, separating said cylinder cavity 3 and cylinder cavity 4, form a first fluid chamber 32, and piston 41 and said partition 21 form a second fluid chamber 42. The cylinder also comprises at least one grooved fluid line 52 or an interior fluid line 53 to enable passage between said fluid chambers 32, 42; a brake fluid inlet line 51 that brings brake fluid into the second fluid chamber 42; and a brake fluid outlet line 54 that discharges the brake fluid into the first fluid chamber 32. Since the brake fluid inlet line is connected to the lower fluid chamber 2 and the outlet line is connected to the upper fluid chamber 1, brake fluid within the cylinder circulates from the bottom to the top, which makes effective use of the property of air to rise. This motion facilitates an easy and complete exhaustion of the air.

REFERENCES:
patent: 2158700 (1939-05-01), Hoyt
patent: 2209343 (1940-07-01), Masteller
patent: 2296008 (1942-10-01), Goepfrich
patent: 2329095 (1943-09-01), White
patent: 3765518 (1973-10-01), Martin

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