Plastic screw anchor
AssigneeAoyama Seisakusho Co., Ltd.
InventorsHiroshi Kazino, Masaaki Ide, Tomiyasu Kakeno
Life of this patent
Estimating the term…
Abstract
A plastic screw anchor having legs each formed with a recess which provides the leg with good flexibility whereby the legs can easily deform during the insertion thereof into an aperture of a supporting plate and also provides a strong grip between the screw anchor and the supporting plate. A wing integrally formed on each leg prevents the screw anchor from coming out of the aperture after having once been inserted therein.
Claims4
A combination of a plastic screw anchor and a supporting plate to which the anchor is secured comprising:
- said plastic screw anchor including a head having a top surface and an under surface;
- oppositely arranged legs extending downward from said under surface of the head;
- a center bore formed through the head and the legs for receiving a self-tapping screw;
- an arched groove formed between the legs;
- the legs each having a recess extending laterally from the external surface of the legs and a wing extending upward and gradually outward from the bottom of the leg;
- and
- a neck portion formed between the under surface and the recess;
- said supporting plate including an aperture through which the plastic screw anchor is fitted;
- said head of the plastic screw anchor is adapted to be sandwiched between the supporting plate and a structural element attached at the top surface of the head when the self-tapping screw is threaded into the center bore;
- and,
- the neck portion of the plastic screw anchor includes a longitudinal height greater than the thickness of the supporting plate.
A combination of a screw anchor and a supporting plate to which the anchor is secured comprising:
- said screw anchor including
- a head having a top surface and an under surface;
- oppositely arranged legs extending downward from said under surface of said head;
- a center bore formed through said head and said legs for receiving a self-tapping screw;
- an arched groove formed between said depending legs;
- a supporting plate;
- said head being adapted to be sandwiched between said supporting plate to which said screw anchor is fitted at the under surface of said head and a structural element attached at the top surface of said head to be secured to said supporting plate;
- said legs each include a recess extending laterally from the external surface of said legs and a wing extending upward and gradually outward from the bottom of said leg;
- and
- a neck portion formed between said under surface and said recess wherein said neck portion has a longitudinal height greater than the thickness of said supporting plate and said wing extends toward said neck portion.
Dependencies are inferred from the claim text.