Dual area brake actuation piston mechanism

Details Dual area brake actuation piston mechanism Dual area brake actuation piston mechanism

1992-02-10

1993-05-11

Look, Edward K.

Motors: expansible chamber type

Plural relatively movable or rigidly interconnected working...

With means for selectively changing the speed or force...

91517, 92 62, 92129, F15B 1100

Patent

active

052091546

ABSTRACT:
The dual area brake actuation piston mechanism (10, 110) comprises a piston housing (12, 112) having therein a first bore (30, 130) disposed coaxially about a separate second bore (40, 140). A first piston (50, 150) is disposed within the first bore (30, 130) and extends from the first bore (30, (130) to a piston end (70, 170). A second piston (60, 160) is disposed within the second bore (40, 140) and extends to engage the piston end (70, 170). The bores (30, 40; 130, 140) have first and second bore openings (32, 42; 132, 142) for receiving pressurized fluid which displaces the respective pistons (50, 60; 150, 160). The second bore opening (42, 142) includes a valving mechanism (80, 180) to either restrict or prevent lower fluid pressures from actuating the second piston (60, 160). Once the first piston (50, 150) has been actuated by lower fluid pressures, higher fluid pressure causes the second piston (60, 160) to be displaced against the piston end (70, 170) so that the piston end (70, 170) is displaced conjointly by both pistons (50, 60; 150, 160). The piston mechanism (10, 110) may include an adjuster mechanism (90, 190) located within the housing (12, 112).

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