Expander mechanism for an internal shoe drum brake

Details Expander mechanism for an internal shoe drum brake Expander mechanism for an internal shoe drum brake

1985-09-18

1987-01-20

Butler, Douglas C.

Brakes

Wheel

Transversely movable

188217, 188364, F16D 6524, F16D 6542

Patent

active

046374990

ABSTRACT:
An expanding mechanism for an interior shoe drum brake, such as a simplex "expander-wedge" type brake, comprises a cylinder housing affixed to a brake support, coaxially mounted pressure pistons slidable in the housing, expander members adjoining the respective pressure pistons and adjusting screws threaded into the pressure pistons which screws engage flange members of the respective brake shoes via interposed pressure pieces. To avoid local pressure peaks, the exterior ends of the adjusting screws are provided with part spherical indentations and the pressure pieces have complementary part spherical inner ends accommodated therein. The outer ends of the respective pressure pieces are connected to the respective flange members of the brake shoes by groove-type guides perpendicular to the axis of the brake drum.

REFERENCES:
patent: 1953258 (1934-04-01), Pentz
patent: 2182262 (1939-12-01), Pierce et al.
patent: 2259074 (1941-10-01), Main
patent: 3035666 (1962-05-01), Beeskow
patent: 3876042 (1975-04-01), Borjesson
patent: 4015694 (1977-04-01), Danko et al.
patent: 4055238 (1977-10-01), Haraikawa et al.

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