Mechanical air failure brake
US4429771A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 26, 1981 |
| Grant date | Feb 7, 1984 |
| Priority date | — |
| Expiry date | Aug 26, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/2072
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A brake mechanism (10) operable to maintain an air operable control drive mechanism (12) in position in the event of failure of the air supply is disclosed. A first rack section (22) is attached to a control lever (16) of the control drive mechanism (12) and is engagable in any operable position of the control lever (16) by a second arcuate rack section (24). A compression spring (62) acting on a toggle mechanism (28) biases the racks into engagement, and an air cylinder assembly (26) acting on the toggle mechanism (28) against the compression spring (62) maintains the second rack section (24) out of engagement with the first rack section (22) so long as the air supply to the air cylinder assembly (26) is maintained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.