Patent Application
20100043149
(a) Field of the Invention
The present invention relates to a hammers and, more particularly, to a hammer that has a pry bar extending from the bottom stem of the metal hammerhead and defining with the bell unit a clamping mouth for securing to a wooden board to facilitate mounting or dismounting of the wooden board.
(b) Description of the Prior Art
A claw hammer generally comprises a metal hammerhead and a handle. The metal hammerhead has a claw at the front side for pulling nails and a bell unit at the rear side for hammering. Therefore, a conventional claw hammer simply provides hammering and nail-pulling functions. Further, the center of gravity of a conventional hammer is biased to the front side of the metal hammerhead. When operating a conventional hammer to drive a nail into a workpiece, the heavy front side of the hammer causes the user difficult to control the point of application of force, and the hammering force may be inaccurately applied to the center of the head of the nail, causing the nail to be curved. Further, during hammering, the user needs to apply much effort to hammer the nail with the hammer.
The present invention has been accomplished under the circumstances in view. According to one aspect of the present invention, the hammer comprises a pry bar extending from the bottom stem of the metal hammerhead thereof in parallel to the extending direction of the bell unit and defining with the bell unit a clamping mouth for clamping to a wooden board so that the pry bar works as a counterweight to keep the hammer in balance and to avoid shift of the center of gravity to the front side of the hammer for enabling the user to control the point of application of force accurately and to the nail into the workpiece with the hammer with less effort.
According to another aspect of the present invention, two series of teeth are respectively formed on the top side of the pry bar and the bottom side of the neck of the bell unit for engaging the wooden board inserted into the clamping mouth so that the hammer can clamp the wooden board firmly.
As shown in
As stated above, the pry arm 3 extends in a parallel direction relative to the bell unit 2 and is spaced below the bell unit 2 at a predetermined distance, and therefore a proper claiming mouth 4 is defined between the pry arm 3 and the bell unit 2. Further, the length of the pry arm 3 is shorter than the bell unit 2. Further, the design of the pry arm 3 gives a counterweight to the bell unit 2, keeping the hammer in balance and preventing shift of the center of gravity to the front side. When hammering a nail into a workpiece, the user can accurately control the point of application of force, thereby driving the nail into the workpiece accurately with less effort.
Further, two series of teeth 21 and 31 are respectively formed on the bottom side of the neck of the bell unit 2 and the top side of the pry arm 3, enhancing the clamping strength of the clamping mouth 4. When the clamping mouth 4 is attached to a wooden board 30, the series of teeth 21 and 31 enhance the engagement between the clamping mouth 4 and the wooden board 30. Further, the peaks of the teeth 21 and 31 are disposed in flush with the periphery of the bell of the bell unit 2 so that the teeth 21 and 31 effectively engage the wooden board 30 when the wooden board 30 is inserted into the clamping mouth 4 (see
Although a particular embodiment of the invention has been described in detail for purposes of illustration, various modifications and enhancements may be made without departing from the spirit and scope of the invention. Accordingly, the invention is not to be limited except as by the appended claims.
