Drum brake with cam operated parking brake lever

Details Drum brake with cam operated parking brake lever Drum brake with cam operated parking brake lever

1993-12-07

1994-11-01

Oberleitner, Robert J.

Brakes

Wheel

Transversely movable

188326, F16D 6556

Patent

active

053600860

ABSTRACT:
The drum brake (10) comprises a backing plate (11) having an anchor block (15) and shoe retainer (17) attached thereto, a parking brake lever (40) connected with one (14) of a pair of drum brake shoes (12, 14), a first pair of drum brake shoe ends (16, 18) engaging an actuation mechanism (20) and a second pair of drum brake shoe ends (22, 24) engaging the anchor block (15). A cam mechanism (50) is attached pivotally to the backing plate (11) and extends transversely relative to the plane of the backing plate (11). A parking brake cable (72) extends through an opening (25) in the backing plate (11) and is connected with the cam mechanism (50) and a second, shorter cable (70) extends between the cam mechanism (50) and an end (42) of the parking brake lever (40). Retraction of the parking brake cable (72) effects a greater displacement of the shorter cable (70) and parking brake lever (40) to effect a parking brake application.

REFERENCES:
patent: 2945564 (1960-07-01), House et al.
patent: 3709334 (1973-01-01), Kondo et al.
patent: 4079819 (1978-03-01), Shirai et al.
patent: 4387792 (1983-06-01), Imamura
patent: 5042623 (1991-08-01), Yamamoto

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