Drive fastening system
AssigneeLitton Systems, Inc.
InventorMichael N. Perugini
Life of this patent
Estimating the term…
Abstract
A fastening system for securing an article to a base uses a conventional drive fastener. A reaction surface on the article contacts the bearing surface on the underside of the fastener head causing the fastener head to tilt relative to the body of the fastener. The reaction surface also causes the body of the drive fastener to deform when it is fully driven into the article, and a portion of the material from the reaction surface is displaced into the aperture to increase the retention force of the fastener.
Claims43
A fastening system securing an article to a base with a drive fastener comprising:
- an aperture formed in the article;
- a drive fastener having an elongated splined body and an enlarged head, said head having a bearing surface formed on the underside thereof;
- and
- a planar reaction surface on the article which is nonperpendicular to the axis of the aperture, adjacent the aperture, and adapted to contact the bearing surface of the fastener head, said reaction surface causing said fastener head to tilt relative to the axis of the aperture and causing the body of the splined fastener to deform when it is fully driven into the article, whereby the retention force of the splined fastener is increased.
A fastening system securing an article to a base with a drive fastener comprising:
- a drive fastener having an elongated splined body and an enlarged head, said head having a bearing surface formed on the underside thereof;
- and
- a nonplanar reaction surface on the article adjacent the first aperture and adapted to contact the bearing surface of the fastener head, said reaction surface causing said fastener head to tilt relative to the axis of the aperture, and causing the body of the drive fastener for deform when it is fully driven into the article whereby the retention force of the drive fastener is increased.
A fastening system securing an article to a base with a drive fastener comprising:
- a reaction surface on the article an aperture formed through the reaction surface and the article;
- a drive fastener having an elongated splined body and an enlarged head, said head having a bearing surface formed on the underside thereof;
- and
- an asymmetric protrusion means formed on the bearing surface for contacting the reaction surface and causing said enlarged head to tilt relative to the elongated body and causing the body of the drive fastener to deform when it is fully driven into the article whereby the retention force of the drive fastener is increased.
AS fastening system for securing an article to a base with a pair of drive fasteners comprising:
- a pair of mounting apertures formed in the article;
- a pair of drive fasteners each having an elongated splined body and a head with a bearing surface formed on the underside thereof;
- and
- a reaction surface means formed on the article adjacent each of the mounting apertures for causing the drive fastener heads to tilt relative to the axis of the mounting apertures and causing the bodies of the fasteners to deform when they are fully driven into the article, wherein one of the reaction surface means causes one of the drive fastener heads to tilt in a direction which is dissimilar to the direction of tilt of the other drive fastener head.
A fastening system securing an article to a base with a nonrotating drive fastener comprising:
- an aperture formed in the article;
- a nonrotating drive fastener having an elongated body and an enlarged head, said head having a bearing surface formed on the underside thereof:
- and
- a reaction surface on the article adjacent the aperture and adapted to contact the bearing surface of the fastener head, said reaction surface for causing said fastener head to tilt relative to the axis of the aperture and thus the body of the fastener to deform, whereby the retention force of the fastener is increased.
A fastening system securing an article to a base with a nonrotating drive fastener comprising:
- an aperture formed in the article;
- a drive fastener having an elongated body and an enlarged head, said head having a bearing surface formed on the underside thereof;
- and
- a nonplanar reaction surface on the article adjacent the aperture and adapted to contact the bearing surface of the fastener head, said reaction surface for causing said fastener head to tilt relative to the axis of the aperture and the body of the fastener to deform when it is fully driven into the article whereby the retention force of the drive fastener is increased.
A fastening system securing an article to a base with a nonrotating drive fastener comprising:
- a reaction surface on the article and an aperture formed through the reaction surface and the article;
- a nonrotating drive fastener having an elongated body and an enlarged head, said head having a bearing surface formed on the underside thereof;
- and
- an asymmetric protrusion means formed on the bearing surface for contacting the reaction surface said asymmetric protrusion means causing said enlarged head to tilt relative to the elongated body and said elongated body to deform when it is fully driven into the article whereby the retention force of the drive fastener is increased.
A fastening system for securing an article to a base with a pair of nonrotating drive fasteners comprising:
- a pair of mounting apertures formed in the article;
- a pair of drive fasteners each having an elongated body and a head with a bearing surface formed on the underside thereof;
- and
- a reaction surface means formed on the article adjacent each of the mounting apertures for causing the bearing surfaces to tilt and the elongated bodies to bend relative to the axis of the mounting apertures.
A fastening system comprising:
- a drive fastener having an elongated splined body and an enlarged head, said head having a bearing surface formed on the underside thereof;
- and
- a reaction surface adapted to contact the bearing surface of the fastener head, said reaction surface for causing said fastener head to tilt relative to the axis of an aperture in the reaction surface and causing the body of the splined fastener to deform when the enlarged head is fully driven against the reaction surface whereby the retention force of the splined fastener is increased.
Dependencies are inferred from the claim text.