Expansible fastening element
US4878790A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 2, 1985 |
| Grant date | Nov 7, 1989 |
| Priority date | — |
| Expiry date | Apr 2, 2005 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16B13/126
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An expansible plastic fastener comprising a generally elongated body portion, a collar member, and locking means comprising a pair of reinforced toggle arms. The body portion has a generally central opening for reception of an elongated retaining element. The reinforcement provides cooperative resilient interaction with the toggle arms to assist movements toward their collapsed and expanded portions while simultaneously contributing to their holding strength. The fastener can also include a Y-shaped reinforcing portion pivotally connected to the locking means of the body portion by flexible connector means. This Y-shaped portion may include means for engaging an elongated retaining element in the form of a threaded member. Also, a fastening kit comprising a fastener of the invention along with a key for expanding the locking means to its optimum expanded position or a fastener of the invention with an elongated retaining element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.