Device for braking and/or blocking a shaft of a vehicle transmission and method for manufacturing such a device
US9140320B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 2, 2011 |
| Grant date | Sep 22, 2015 |
| Priority date | — |
| Expiry date | Sep 7, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49611
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A vehicle transmission includes a housing part, a shaft extending from the housing part, and a spring element having a plurality of spring windings wound around the shaft, a first end of the spring element being fixed to the housing part. An actuating means is attached to a second end of the spring element and is configured to twist the second end in a circumferential direction of the spring element to thereby cause the spring element to tighten and frictionally contact an outer circumference of the shaft. The spring element is comprised of a hollow cylindrical metal base body having a helical-shaped incision that defines the plurality of spring windings. The incision may be formed in the hollow cylindrical base body by a plasma beam process, by a laser cutting process, by a flame cutting process or by a water jet cutting process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.