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US 4,978,265 AGranted
Sleeve anchor for screw
OwnerThomas E. De Waninventor
Life of this patent
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OwnerThomas E. De Waninventor
Estimating the term…
An anchor adapted for insertion in a hole through the wall. The wall includes inner and outer surfaces with the hole extending inwardly through the wall from the outer surface of the wall to the inner surface of the wall. The anchor comprises a head, a body, and a passage through the head and body into which a fastener, such as a screw, is adapted to be inserted. The passage has a central longitudinal axis. A surface on the head is engageable with the outer surface of the wall when the body of the anchor is inserted in the hole. At least one resiliently flexible leg extends axially of the body and terminates in a free end moveable generally radially inward and outward relative to the central axis of the body. The anchor also has a holder adjacent to the free end of the leg. The holder projects laterally outwardly from the leg. The leg is adapted to resiliently flex generally radially inwardly as the body is inserted in the hole to a point where the holder exits the hole on the inside surface of the wall. The leg, thereafter, is adapted to resiliently snap generally radially outwardly to a locking position where the holder extends beyond the hole and overlaps the inside surface of the wall to prevent the body from being pulled back through the hole. The distance between the wall-engaging surface of the head and the holder is essentially identical to the thickness of the wall so that when the holder is in the locking position the anchor cannot be moved axially with respect to the hole in the wall.
An anchor for insertion in a hole through a wall, said wall having inner and outer surfaces with the hole extending inwardly through the wall from the outer surface of the wall to the inner surface of the wall, said anchor comprising a body having a passage therethrough into which a fastener, such as a screw, is adapted to be inserted, said passage having a central longitudinal axis, a plurality of resiliently flexible legs extending axially of the body and terminating in free ends movable generally radially inward and outward relative to the central axis, and a single holder on each leg projecting laterally outwardly from the leg, said holders being spaced at intervals axially of the body for accommodating walls of different thicknesses, said legs being adapted to resiliently flex generally radially inwardly as the body is inserted in the hole to a point where at least one of said holders exits the hole on the inner surface of the wall, the leg of said one holder thereafter being adapted to flex generally radially outwardly to a position wherein the holder extends beyond the hole and overlaps the inner surface of the wall to resist pulling of the body back through the hole.
A headless anchor for insertion in a hole through a wall, said wall having inner and outer surfaces with the hole extending inwardly through the wall from the outer surface of the wall to the inner surface of the wall, said anchor having a leading end and a trailing headless end so that the trailing end can freely pass into the hole, said anchor comprising a body having a passage therethrough into which a fastener, such as a screw is adapted to be inserted, said passage having a central longitudinal axis, at least one resiliently flexible leg extending axially of the body and terminating in a free end movable generally radially inward and outward relative to the central axis, and a holder adjacent the free end of the leg projecting laterally outwardly from the leg, said legs being adapted to resiliently flex generally radially inwardly as the body is inserted in the hole to a point where said holder exits the hole on the inner surface of the wall, said leg thereafter being adapted to flex generally radially outwardly to a position wherein the holder extends beyond the hole and overlaps the inner surface of the wall to resist pulling of the body back through the hole.
A series of anchor members, each having an elongate body and a holder spaced lengthwise of the body from one end of the body and projecting laterally outwardly from the body at one side of the body, said members being integrally and flexibly attached to one another in side-by-side relation by hinges to form a strip of interconnected anchor members, said strip being adapted to be rolled up to form a roll of anchor members with at least one of the members overlapping another of the members and with the holders of the anchor members projecting generally radially outwardly relative to a central longitudinal axis of the roll, said roll being adapted to be inserted in a hole through a wall with the roll defining a passage into which a fastener, such as a screw, may be inserted, said fastener as it is inserted into the passage being adapted to force said anchor members radially outwardly to a position wherein one or more of said holders are engageable with an inner surface of the wall to secure the roll in fixed position in the hole.
Dependencies are inferred from the claim text.