Telescopic brake piston

Details Telescopic brake piston Telescopic brake piston

1989-12-27

1991-12-17

Look, Edward K.

Brakes

Wheel

Axially movable brake element or housing therefor

188370, 92 51, 92 52, 92 61, 92 65, 92151, F16D 5518

Patent

active

050728113

ABSTRACT:
A telescopic brake piston includes a cylindrical housing and a pair of concentric pistons. A first hydraulic cavity is provided between an outer piston and the housing, while a second hydraulic cavity, communicating with a source requesting the application of brake force, communicates with both pistons. Passages in the outer piston allow the two cavities to communicate with each other. As the associated brake disc stack wears, the outer piston progressively extends from the housing as the passages are exposed by the inner piston. The actual brake force is attained by the inner piston alone.

REFERENCES:
patent: 2952338 (1960-09-01), Oswalt
patent: 3255846 (1966-06-01), Livezey
patent: 3302535 (1967-02-01), Procter et al.
patent: 3707210 (1972-12-01), Nyunoya et al.
patent: 3828894 (1974-08-01), Crossman
patent: 3995721 (1976-12-01), Chambers
patent: 4006669 (1977-02-01), Price
patent: 4570531 (1986-02-01), Anderson et al.

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