Cutlery – Perforating or indenting implements
Reexamination Certificate
2001-06-21
2003-02-18
Payer, Hwei-Siu (Department: 3724)
Cutlery
Perforating or indenting implements
C030S316000
Reexamination Certificate
active
06519858
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a tool which exposes the head of a non-threaded fastener for easy removal from an object anchored to a wood substrate by the fastener, and prepares the surface of the anchored object adjacent the fastener for easy repair after removal of the fastener.
Non-threaded fasteners, such as nails and staples, are used to anchor many things to a wood substrate. A typical example is the use of nails to attach sheet rock to wooden studs. Nails are used to attach wood to wood, such as attachment of wooden cabinets to wooden studs.
If it is required to remove the nail from the anchored material, claw hammers or special tools having a claw are typically used with the claw being wedged under the nailhead and mechanical extraction leverage applied to the embedded nail shank through the handle of the claw tool. Use of a claw device usually causes considerable surface damage to, or total destruction of, the anchored object during extraction of the nail.
A number of tools have been suggested to alleviate this problem, such as the nail puller tools described in U.S. Pat. Nos. 4,658,457 and 4,776,568. However, these tools do not provide the leverage required to quickly remove the shank of a nail tightly imbedded in the wood substrate.
SUMMARY OF THE PRESENT INVENTION
The present invention provides an impact tool which exposes a fastener head embedded in a substrate for easy engagement by a conventional claw device while saving the visual and physical integrity of the adjoining substrate area, and at the same time creates a dimpled depression thereabout which, after extraction of the fastener, can be easily filled.
The tool includes a cylindrical body portion (shank) one end of which constitutes a driving head and the other end of which constitutes a fastener exposure/dimpling head.
The fastener exposure/dimpling head includes a fastener receiving cavity, a cutting lip extending outwardly from the fastener receiving cavity, and a rounded dimpling section located between the cutting lip and the outer surface of the shank. Preferably, a transition section is located between the cutting lip and the dimpling section.
REFERENCES:
patent: 2530399 (1950-11-01), Pilgrim
patent: 2670537 (1954-03-01), Campbell
patent: 3990451 (1976-11-01), Gibbs
patent: 4041558 (1977-08-01), Victor
patent: 4355466 (1982-10-01), Quiring
patent: 4658457 (1987-04-01), Rakita
patent: 4776568 (1988-10-01), Perel
patent: 4960235 (1990-10-01), Gregory
patent: D374802 (1996-10-01), Spirer et al.
patent: 5622352 (1997-04-01), Swindall
patent: 5749113 (1998-05-01), Witter
Catalogue of unknown supplier, unknown date, p. 1978—page title “Hole Punches & Gasket Cutters”.
Howard Robert E.
Payer Hwei-Siu
LandOfFree
Non-threaded fastener removal tool does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Non-threaded fastener removal tool, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Non-threaded fastener removal tool will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3143662