Mechanically actuated drum brake
US5553691A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 15, 1995 |
| Grant date | Sep 10, 1996 |
| Priority date | — |
| Expiry date | Mar 15, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/20666
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A drum brake having a support plate (10) with first and second shoes (12,14) slidably mounted thereon. Each of the shoes (12,14) having a web (12a,14a) and a rim (12b,14b) with a face for receiving a friction lining (16,18). Each web (12a,14a) has a first end and a second end. The rim holds the friction lining in a position to engage a drum (20) in response to an input force applied to the first end of the webs (12a,14a) of the shoes (12,14) by a hydraulic actuation device (22). A bearing member (28) is secured to the support plate (10) and is connected to a second end of the webs (12a,14a). A spacer device (40) arranged in the vicinity of the hydraulic device has a variable length to establish a spacing between the shoes (12,14) and drum (20). A mechanical actuation device (50) secured to a web (14a) of shoe (14) has a first actuation lever (60) and a second lever (70). A force applied to the first lever (60) is articulated through the second lever to act on the web (12a) of shoe (12) such that a brake force is substantially distributed to bring each friction lining (16,18) into engagement with the drum (20) and effect a brake application.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.