Fastening element
US4704057A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 6, 1981 |
| Grant date | Nov 3, 1987 |
| Priority date | — |
| Expiry date | Aug 6, 2001 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16B13/0808
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An improved fastening element for securement within an opening and of the type comprising (a) a head portion; (b) a connecting portion comprising a longitudinally extending body portion including a pair of opposed pillar-like parts, for insertion into such opening; and (c) at the end of said connecting portion remote from the head portion, locking means movable between a collapsed position in which the fastening element is insertable into the opening and an expanded position in which the locking means is effective in cooperation with an elongated retaining element inserted into the connecting portion to preclude removal of the fastening element from the opening. The improvement of the invention resides in the locking means which comprises: PA1 (i) a pair of substantially rigid arms pivotally connected to said pillar-like parts at radial locations substantially adjacent to or within the radius of the body portion in the expanded position and whose proximal end portions are cantilevered for engagement with the elongated retaining element and disposed to pivot with respect to each other in a plane which includes the longitudinal axis of said body portion, whereby the arms are movable …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.