Non-removable fastening devices
AssigneeITW de France
InventorHenri Morel
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Abstract
The invention relates to an unextractable fastening device for mounting in an opening formed in a panel. The device is of the kind comprising a head, a curved retaining cam and a flexible locking element and is characterized in that it has a body complementary to and without clearance with the perimeter of the opening and in that a gap formed in said body enables said locking element to withdraw into said gap when the device is inserted into the opening. The device is applicable to standard round, rectangular or square openings and withstands considerable loads without play.
Claims6
A one-piece non-removable fastening device in combination with a predetermined uniform and uninterrupted opening formed in a panel, said fastening device including a head, a body extending from said head and having a solid cross-sectional configuration at its juncture with said head that is substantially identical to said opening, a curved retaining cam extending outwardly laterally from the free end of said body and thence reversely extending upwardly toward said head, the free end of said cam terminating in spaced opposition to a plane lying on the juncture of said head and body, and at least one flexible locking element, a gap formed in said body which enables said locking element to be withdrawn into said gap at the moment of inserting the device into said complementary opening, whereby the device is adapted to withstand, without play, considerable shear loads since a substantially continuous solid span is formed between the body and the edge of said opening except for said gap in said body.
Dependencies are inferred from the claim text.