Brakes – Operators – Spring
Patent
1998-09-29
2000-12-19
Butler, Douglas C.
Brakes
Operators
Spring
188161, B60T 1304
Patent
active
061616591
ABSTRACT:
An electromagnetic brake includes an improved friction disk that has at least one friction surface formed entirely from a rubber material such as a styrene butadiene rubber material. The rubber material 1) has a high coefficient of friction, 2) conforms to the shape of the mating braking surfaces, 3) is dimensionally stable so as not to unnecessarily widen the air gap of the brake when the brake is applied, and 4) exhibits acceptable wear characteristics. The rubber material also preferably does not exhibit a sharp reduction in coefficient of static friction when it is heated, e.g., due to friction from its mating surfaces and/or due to heat transfer from the electric motor or other braked element. The resultant brake is relatively light-weight, compact, and inexpensive. It is particularly well-suited for use as a static, park-and-hold brake for an electric motor or the like.
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Butler Douglas C.
Inertia Dynamics, Inc.
Siconolfi Robert A.
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