Browse Prior Art Database

Molded Fastener

IP.com Disclosure Number: IPCOM000086111D
Original Publication Date: 1976-Jul-01
Included in the Prior Art Database: 2005-Mar-03
Document File: 2 page(s) / 31K

Publishing Venue

IBM

Related People

Wheeler, SE: AUTHOR

Abstract

Fastener X has a dart-type configuration which allows it to be snapped into a square, cast or punched hole 2 in a frame 10 producing a rigid assembly with frame 10.

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Molded Fastener

Fastener X has a dart-type configuration which allows it to be snapped into a square, cast or punched hole 2 in a frame 10 producing a rigid assembly with frame 10.

Fastener X includes a clip portion 1 which may, for example, act as a support and which is connected with a cylindrical curved portion 3 abutting frame 10 on the front surface 10A of frame 10. Two arms 4 are connected with portion 3 and have terminal portions 5 which extend backwardly and outwardly toward the back surface 10B of frame 10, and which have outwardly flaring outer surfaces 6. Fastener X may be molded of a relatively flexible plastic such as nylon or DELRIN*, and the arrangement of parts of fastener X is such that the fastener may be so molded with a two direction mold pull, producing the relatively complex part.

To fix fastener X with respect to frame 10, the two arms 4 are inserted into hole 2, and portion 3 is pushed in the direction shown by arrow 7. The edge surfaces defining hole 2 engage the outwardly flaring surfaces 6 on arms 4 and move arms 4 together, so that terminal portions 5 move through the relatively narrow hole 2. When portions 5 are clear of the edge surfaces defining hole 2, arms 4 return to their normal positions in which they are shown in the figures to bring portions 5 out of line with hole 2. Pressure is then removed from portion 3 allowing it to spring back to have a greater curvature than shown in the figures, thus moving and holding terminal porti...