Claims
- 1. A fastener, for fastening an article to a hardened substrate, comprising:
- a. a driving head member having a surface for receiving a directed driving force defining an outer periphery thereof;
- b. a penetration shank perpendicularly attached to said driving head member thereto along an axis in the direction of said driving force;
- c. said shank further comprising:
- 1. at least three but less than five penetrating wedges, perpendicularly extending from said axis, each wedge having a hardened, straight, outer penetrating edge extending from a point substantially adjacent to the outer periphery of said driving head member to a tip point defined on said axis;
- 2. said wedges meeting at inner edges, forming a shank tapered from said tip point to said driving head;
- 3. said outer penetrating edges forming an angle greater than fifteen degrees.
- 2. An article for fastening an intermediate strip to a hardened substrate comprising:
- a. a driven head;
- b. three of four triangular penetrating members, perpendicularly affixed to a first side of said driving head; and
- c. said triangular penetrating members being fixed joined along an axis perpendicular to said head;
- d. said members being symmetrically displaced, radially with respect to one another about said axis; and
- e. each said triangular member having a substantially straight, hardened outer edge fixedly connected from an outer edge of said driven head extending to form a penetrating point;
- f. said triangular members meeting at inner edges, forming a linearly increasing taper from said penetrating point to said driving head;
- g. said penetrating point forming an angle having a taper of greater than fifteen degrees.
- 3. A furring strip, of the kind having carpet holding means and means for fastening to a subsurface, said means for fastening comprising:
- a. a driving head member having a surface for receiving a directed driving force defining an outer periphery thereof;
- b. a penetration shank perpendicularly attached to said driving head member thereto along an axis in the direction of said driving force;
- c. said shank further comprising:
- 1. at least three but less than five penetrating wedges, perpendicularly extending from said axis, each wedge having a hardened, straight, outer penetrating edge extending from a point substantially adjacent to the outer periphery of said driving head member to a tip point defined on said axis;
- 2. said wedges meeting at inner edges, forming a shank tapered from said tip point to said driving head;
- 3. said outer penetrating edges forming an angle greater than fifteen degrees.
Parent Case Info
This is a continuation of application Ser. No. 06/931,204, filed on Nov. 16, 1986, now abandoned.
US Referenced Citations (4)
Foreign Referenced Citations (5)
Number |
Date |
Country |
1090389 |
Oct 1954 |
FRX |
1286760 |
Jan 1962 |
FRX |
1475762 |
Feb 1967 |
FRX |
163664 |
Aug 1921 |
GBX |
483646 |
Aug 1938 |
GBX |
Continuations (1)
|
Number |
Date |
Country |
Parent |
931204 |
Nov 1986 |
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