Fastener with deformable portion for guiding pins or the like

Claim 2

A fastener combination characterized by: a. at least one anchoring element which is adapted to be driven into a base, b. a guide member for each said anchoring element which includes

Claim 3

a substantially planar bottom plate that is adapted to rest against the base into which the anchoring element is to be driven, said bottom plate being adapted to serve as a support for the tip of said anchoring element prior to the time that a driving force is applied to said anchoring element and as a lower guide means for said anchoring element after force is applied, 2. a superstructure extending upwardly from said bottom plate and bridging over it so as to form at least a partial roof over an area of said planar bottom plate and a cavity between such roof and the planar bottom plate, the area of said planar bottom plate that is covered by said superstructure roof being many times the cross-sectional area of said anchoring element, said superstructure: A. having an opening in the uppermost portion thereof that has an internal diameter which approximates the external diameter of said anchoring element, B. being symetrically shaped in relation to the anchoring element, C. having its lower portion joined to said substantially planar bottom plate around a junction line that defines an area many times greater than the area of said opening in the uppermost portion of the superstructure and D. having its uppermost portion that contains said hole spaced away from said planar bottom plate by a distance which is equal to a substantial portion of the length of the anchoring element, c. said anchoring element being in tight fit engagement with the hole in said superstructure portion and having its axis directed substantially perpendicular to the plane of said bottom plate and having a cross section substantially less than the largest cross section of said cavity in a plane perpendicular to said anchoring element, whereby during the course of driving said anchoring element into a base, said superstructure and said bottom plate will continue to guide said anchoring element until such time as the driving force has flattened said superstructure against said bottom plate and eliminated the cavity therebetween, d. said cavity between the bottom plate and the superstructure having a continuously decreasing cross section from the bottom plate up to the level for the engagement of the anchoring element in the superstructure.

Claim 4

a substantially planar bottom plate that is adapted to rest against the base into which the anchoring element is to be driven, said bottom plate being adapted to serve as a support for the tip of said anchoring element prior to the time that a driving force is applied to said anchoring element and as a lower guide means for said anchoring element after force is applied, 2. a superstructure extending upwardly from said bottom plate and bridging over it so as to form at least a partial roof over an area of said planar bottom plate and a cavity between such roof and the planar bottom plate, the area of said planar bottom plate that is covered by said superstructure roof being many times the cross-sectional area of said anchoring element, said superstructure: A. having an opening in the uppermost portion thereof that has an internal diameter which approximates the external diameter of said anchoring element, B. being symetrically shaped in relation to the anchoring element, C. having its lower portion joined to said substantially planar bottom plate around a junction line that defines an area many times greater than the area of said opening in the uppermost portion of the superstructure and D. having its uppermost portion that contains said hole spaced away from said planar bottom plate by a distance which is equal to a substantial portion of the length of the anchoring element, c. said anchoring element being in tight fit engagement with the hole in said superstructure portion and having its axis directed substantially perpendicular to the plane of said bottom plate and having a cross section substantially less than the largest cross section of said cavity in a plane perpendicular to said anchoring element, whereby during the course of driving said anchoring element into a base, said superstructure and said bottom plate will continue to guide said anchoring element until such time as the driving force has flattened said superstructure against said bottom plate and eliminated the cavity therebetween, d. said cavity between the bottom plate and the superstructure having a continuously decreasing cross section from the bottom plate up to the level for the engagement of the anchoring element in the superstructure.

Claim 5

The fastener combination according to claim 1 wherein said superstructure is formed integral with said bottom plate.

Claim 6

The fastener combination according to claim 1 wherein said superstructure is secured to said bottom plate.

Claim 7

The combination according to claim 1 wherein said bottom plate is provided with at least one edge recess forming guide groove for an object to be mounted on said fastener.

Claim 8

The combination according to claim 1 wherein the surface of said bottom plate facing said superstructure is formed with a depression, into which at least a substantial portion of said superstructure is forced during the course of driving said anchoring element into said base.

Claim 9

The fastener combination according to claim 1 wherein said guide member is formed of a piece of tubular material having at least one substantially planar surface, which tubular piece is slit open in selected lengths but held together along one portion of the planar surface in such a manner that each length corresponds to a guide member and the planar surface forms the bottom plate of the guide member.

Claim 10

The fastener combination according to claim 6 wherein said slits are symmetrically V-shaped and diverge outwardly with respect to said planar surface so as to form substantially pyramid-shaped guide members.

Claim 11

The fastener combination according to claim 1 wherein said superstructure is a cap-shaped body.

Claim 12

The fastener combination according to claim 8 wherein said cap-shaped body has semi-spherical form.

Claim 13

The fastener combination according to claim 1 wherein the portion of said anchoring element extending outside of said superstructure is threaded and this threaded portion has a dimension smaller than the portion of said anchoring element extending into said superstructure.

Claim 14

The fastener combination according to claim 1, wherein said superstructure is dimensioned to fall off subsequent to the driving and guiding of said threaded anchoring element into the base.

Claim 15

The fastener combination according to claim 1 wherein said superstructure is provided with recesses.

Claim 16

The fastener combination according to claim 1 wherein said anchoring element is inserted with press fit into said superstructure.

Claim 17

The fastener combination according to claim 1, wherein said bottom plate is provided with a plurality of said superstructures.