Electric drum brake
AssigneeGeneral Motors Corporation
InventorsSchuyler S. Shaw, Linda L. Hallinan, Robert J. Hammersmith, Donald E. Schenk, Edward J. DeHoff, Alexander Kade
Life of this patent
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Abstract
An automotive vehicle drum brake is provided including a brake drum connected to a wheel. A backing plate is connected to the vehicle and at least one brake shoe is connected with the backing plate and is pivotally mounted with respect thereto. A non-rotative nut is mounted for linear motion with respect to the backing plate and is pivotally connected with respect to the brake shoe. A power screw is threadably engaged with the nut. The power screw is also mounted to the backing plate. An electric motor is torsionally connected with the power screw to turn the same to actuate the brakes.
Claims12
An automotive vehicle drum brake comprising:
- a brake drum for connection to said wheel,
- a backing plate for connection to said vehicle;
- at least one brake shoe connected with said backing plate and pivotally mounted with respect thereto;
- a non-rotative nut mounted for linear motion with respect to said backing plate and having means of pivotal connection with said brake shoe;
- an apply lever pivotally connected with said nut, said apply lever having an activator wherein pivotal movement of said lever causes said actuator to contact said brake shoe and to pivot the same;
- a power screw threadably engaged with said nut, said power screw being mounted to said plate;
- and
- an electric motor means torsionally connected with said power screw to turn the same to actuate said brakes.
Dependencies are inferred from the claim text.