Implements or apparatus for applying pushing or pulling force – Nail extractor type – Single throw lever
Reexamination Certificate
1999-05-03
2001-10-09
Morgan, Eileen P. (Department: 3723)
Implements or apparatus for applying pushing or pulling force
Nail extractor type
Single throw lever
C081S020000, C081S026000
Reexamination Certificate
active
06299136
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a claw hammer head and, more specifically, an improved claw hammer head having a high brow and multi-radiused claw with tapered, pointed claw tips and a very sharp V slot.
In order to keep the terminology that is used in this patent clear, the following definitions are used throughout the specification and claims:
Head: The object attached to the end of the handle, used to strike the nail.
Face: The surface of the “head” traditionally used to strike the nail.
Body: The main portion of metal on which the rest of the hammer is formed.
Neck: The part of the head between the face and the body.
Socket: The longitudinal hole in the body material in which the end of the handle is inserted and fixed in the usual manner by one or more wedges.
Side-hitter: A “face” on the side of the body used for hitting nails in tight places.
Claw: The part of the head used to remove a nail from wood.
Slot: The area in the claw in which the shank of the nail is gripped to remove the nail from the wood.
Rocker: The longitudinal curvature of the surface of the claw that bears against the wood.
Roll: The lateral curvature of the surface of the claw that bears against the wood.
Brow: The top of the body including the socket adjoining the rocker.
Pocket: The pocket is the area of the head between the interior surface of the claw and rear face of the body of the head.
Cup: The cup is a small indentation on the rear surface of the body at a position roughly in line with a initial opening of the slot or throat adjacent the tips of the claw.
Spiking: The act of starting a nail in the wood, using only the hammer head to hold the nail.
Claw hammer heads have been long known in the art. Generally, the heads have a low brow with a uniform radius curved claw on one side and a short neck with flat face on the other side. These conventional hammer heads, with a low brow (from top to top edge of face being on the order of ¼ to {fraction (5/16)}″) is designed to pull 1½″ nails. Additionally, with conventional hammer heads having a low brow, at close to limit of travel during nail pull rotation, the top edge of the face can and often does contact the wood, (dents and dings) which is especially undesirable if doing finishing work in expensive hard woods. The claw generally has square end, blunt, chisel-like tips and a relatively broad V slot for pulling nails. The neck of a conventional hammer head is only about 1¾″. The face is flat and parallel with the centerline of the handle of the hammer.
SUMMARY AND OBJECTS OF THE INVENTION
It is an object of the present invention to provide a claw hammer especially suitable for easily pulling long nails with much less pulling power.
It is another object of the present invention to provide a claw hammer better adapted for pulling small head finishing nails and even “headless” nails.
It is yet another object of the present invention to provide a claw hammer with the ability to remove embedded nails with the specially designed claw.
It is yet a further object of the present invention to provide a claw hammer better adapted for spiking.
The high-brow head combined with a progressive radius claw curve reduces the force needed to only a few pounds over the entire arc of nail pulling rotation. The claw tips are pointed, enabling the claw to dig under nail heads that are below the wood surface. The claw has a very sharp V throat which can dig right into the shank of the nail, for pulling out a nail with an additional leverage or for spiking. The wedging effect in the slot keeps the nail from moving sideways while the contoured cup holds the head of the nail securely to prevent turning of the nail about the pivot at the slot.
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Danganan Joni B.
Morgan Eileen P.
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