Patent · US Expired

Drum brake system

US6622833B2 · kind B2 · utility

2Cited by

10References

7Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Dietmar Baumann · Hemmingen, DE
Hanniel Schmidt · Waldbronn, DE
Herbert Vollert · Lambach, DE
Frieder Keller · Ubstadt-Weiher, DE

Key dates

Filing date	Jun 18, 2002
Grant date	Sep 23, 2003
Priority date	—
Expiry date	Jun 18, 2022

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF16D2125/48
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

The invention relates to a drum brake device (10), which is provided as a wheel brake for a motor vehicle. The invention proposes embodying the drum brake device (10) with a brake belt (14), which is disposed inside a brake drum (12) and can flex in the radial direction of the brake drum (12). Thrust exerted on one end (18) of the brake belt (14) with a simultaneous bracing of the other end (20) of the brake belt (14) causes the brake belt (14) to be pressed against the brake drum (12) from the inside and produces a braking moment. The invention has the advantage that a friction force exerted on the brake belt (14) by the brake drum (12) augments the thrust on the end (18) of the brake belt (14) and thus boosts the braking moment. Another advantage is that the brake belt (14) always rests uniformly against the brake drum (12) over its entire circumference, even, for example, when the brake drum (12) expands due to heating.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.