US4287807A — Pull-to-set anchoring device

Claim 1

Independent Claim 162 words

In a pull-to-set anchor assembly comprising a fastener body having an elongate stem with a head at one end and pulling means at the other end and a reduced axially tapering portion of the stem disposed intermediate of the pulling means and the head, said axially tapering portion having the taper increasing toward the head and terminating as the diameter of the stem is reached and further including a deformable retaining means that is disposed about the tapering portion, said retaining means being greater than the diameter of the stem, said retaining means being arranged to engage an external surface and deform upon actuation of said pulling means wherein an abutment means disposed on the head is arranged to engage and expand the retaining means and limit motion of the stem along the longitudinal axis of the stem, said abutment means comprising an expandable annular member of diameter greater than the diameter of the stem which causes said retaining means to expand.

Claim 2

Dependent Claim 162 words

In a pull-to-set anchor assembly comprising a fastener body having an elongate stem with a head at one end and pulling means at the other end and a reduced axially tapering portion of the stem disposed intermediate of the pulling means and the head, said axially tapering portion having the taper increasing toward the head and terminating as the diameter of the stem is reached and further including a deformable retaining means that is disposed about the tapering portion, said retaining means being greater than the diameter of the stem, said retaining means being arranged to engage an external surface and deform upon actuation of said pulling means wherein an abutment means disposed on the head is arranged to engage and expand the retaining means and limit motion of the stem along the longitudinal axis of the stem, said abutment means comprising an expandable annular member of diameter greater than the diameter of the stem which causes said retaining means to expand.

Claim 3

Dependent Claim 24 words

The anchor assembly according to claim 1, wherein a peripheral groove is disposed upon the head and the abutment is disposed within said groove.

Claim 4

Dependent Claim 40 words

The anchor assembly according to claim 2, wherein the abutment means is a ring that is partially seated within said groove and arranged to engage one end of the retaining means upon application of a pulling force to the stem.

Claim 5

Dependent Claim 150 words

A pull-to-set anchor assembly comprising a fastener body having an elongated stem with a head at one end said head having a diameter not substantially less than the stem and a reduced axially tapered portion of the stem merging with the head, a member slidably mounted on said portion for radial expansion thereby and a resilient band initially retained on said head and having an outer circumference larger than that of the head, the arrangement being such that upon axial movement of the stem relative to the member when the assembly has been inserted head first in a bore of substantially the same outer diameter as the band, the member is circumferentially enlarged for engagement with the wall of the bore and the band is engageable with the member endwise to limit the relative movement of the stem and member and augment holding capability of the assembly with said wall.

Claim 6

Dependent Claim 150 words

A pull-to-set anchor assembly comprising a fastener body having an elongated stem with a head at one end said head having a diameter not substantially less than the stem and a reduced axially tapered portion of the stem merging with the head, a member slidably mounted on said portion for radial expansion thereby and a resilient band initially retained on said head and having an outer circumference larger than that of the head, the arrangement being such that upon axial movement of the stem relative to the member when the assembly has been inserted head first in a bore of substantially the same outer diameter as the band, the member is circumferentially enlarged for engagement with the wall of the bore and the band is engageable with the member endwise to limit the relative movement of the stem and member and augment holding capability of the assembly with said wall.

Claim 7

Dependent Claim 30 words

An anchor assembly according to claim 4 wherein the band is a split ring of metal initally receivable, at least in part, in a groove circumferentially formed in said head.

Claim 8

Dependent Claim 59 words

An anchor assembly as in claim 5, wherein the ring is a wire of circular cross-section and said groove is of a depth approximately equal to about half the diameter of the wire, the axial width of the groove corresponding substantially to the diameter of the wire, said wire substantially occupying more than one half of the groove circumferentially.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1984-09-07	1985-03-09	1985-09-08	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1988-09-07	1989-03-09	1989-09-08	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1992-09-07	1993-03-09	1993-09-08	$7700.00	Window Closed / Lapsed

Pull-to-set anchoring device

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