Toggle latch with automatic safety catch
US4925221A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 1, 1988 |
| Grant date | May 15, 1990 |
| Priority date | — |
| Expiry date | Sep 1, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T292/108
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A toggle latch is shown which retains a structure, such as an aircraft door, latched against a second structure, such as the fuselage. The latch includes a housing having a latch actuator joined to the housing a first pivot point and a latch member joined to the housing at a second pivot point. A linkage joins the latch actuator and latch member at third and fourth pivot points. In the latched position, the fourth pivot point is positioned past a center line between the first and third pivot points to create the over-center, toggle effect of the latch. A safety catch is pivoted within the latch actuator which extends into a passage in the actuator. The safety catch also engages the housing when the toggle latch is in its latched position to lock the latch closed. Insertion of a tool into the passage engages the safety catch to remove it from its locking contact with the housing and free the latch actuator for opening the latch.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.