Tools – Handle for tool – Having cap or reinforcing means
Reexamination Certificate
2000-04-10
2001-10-02
Hail, III, Joseph J. (Department: 3723)
Tools
Handle for tool
Having cap or reinforcing means
C081S489000, C081S177600
Reexamination Certificate
active
06295904
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to the field of hand tools and more particularly to a novel driving tool for screws, nuts, bolts or other fasteners and which incorporates fold-out torque lever arms, a swivel bearing at the top for increasing speed rotation and further including an insulation barrier between the driver shaft and a metal handle to avoid electrical shock.
2. Brief Description of the Prior Art
In the past, it has been the conventional practice to employ a driver for installing or removing fasteners involving a twisting or rotational movement and such driving tools include a handle with a fixed driver shaft outwardly projecting from the end of the handle. In most instances, the user must grasp the handle and perform a twisting movement, followed by releasing the handle and gripping a second time to again twist the handle so that sequential or repeated gripping and twisting will cause the drive shaft to eventually install or remove a fastener. Also, conventional drivers subject the user to hand abrasion and to electrical shock should the driving shaft engage an electrical wire or circuit during use. This is a particular problem when metallic handles are employed. Additionally, fasteners which are intended to be removed are sometimes difficult to remove since corrosion or the like may somewhat freeze the fastener in its location. Under such circumstances a considerable amount of twisting is required and it would be helpful if the user had some means for providing increased torque for the twisting movement.
Therefore, a long standing need has existed to provide a novel driving tool which has the capability of providing extra torque during the twisting procedure and which further includes a swiveling feature to permit speed rotation of the driving tool without abrasion to the operator and which allows for ease of consistent alignment with respect to the end of the driving tool with the fastener intended to be driven. An electrical non-conductive insulator is desirable between the driver shaft and the metallic handle held by the user which will avoid or prevent electrical shock to the user.
SUMMARY OF THE INVENTION
Accordingly, the above problems and difficulties are avoided by the present invention which provides a novel driver assembly or tool for installing or removing a fastener which includes an elongated handle having opposite ends from which a driver shaft outwardly projects from a selected end. The free end of the driver shaft includes a fastener engaging end which preferably is shaped to fit the configuration of the fastener intended to be driven. The non-selected end of the handle includes a rotation means permitting the handle and driver shaft to be spun or rotated during the fastener turning procedure. In one form, a rotating knob is mounted on the non-selected end of the handle by means of a bearing. Non-conductivity between a metal handle and the driver shaft is achieved by incorporation of an insulating filler means critically disposed between the attachment of the driver shaft to the selected end of the handle, whereby the insulating filler means provides an electrical barrier for any electricity from an electrical circuit that may touch or engage with the shaft during the turning process. The inventive driver tool further includes a fold-out lever or breaker bar which resides within a storage slot recessed in the handle when not in use and which is adapted to outwardly deploy into an operative position. This latter position is normal with respect to the longitudinal axis of the drive shaft and handle so that the user is provided with additional torque during the twisting or rotating procedure to drive the fastener. Means are provided for locating the lever arm or breaker bar at a 90° deployment and preferably, the length of the lever or breaker bar is shorter than the length of the handle on which it is mounted. A pivot pin is employed for deployably mounting the lever arm or breaker bar onto the side of the handle adjacent to the recess.
Accordingly, it is among the primary object of the present invention to provide a fastener driver or driver tool which includes a torque lever arm or breaker bar that pulls or snaps in and out of the driver handle in order to provide extra torque drive for the user and which further may readily be stored within the handle or body of the tool when not in use.
Another object of the present invention is to provide a fastener driving tool which incorporates a swivel top cap that allows speed rotation of the driver tool without abrasion to the hand of the operator and which permits ease of consistent alignment of the drive shaft with the fastener intended to be driven.
A further object of the invention resides in providing an electrical insulative material between the drive shaft and handle of a driving tool which is aligned by a non-conductive centering insulator which is injected under high pressure into the handle within a receptacle between the handle and the drive shaft so as to expand and form a solid joint of high strength.
Still a further object is to provide an insulated torque lever driving tool having the above features which may be operated simultaneously to provide increased turning torque, non-conductivity of electricity and provides speed rotation without the necessity of having to add mechanical elements or removing any mechanical elements from the tool so that the inventive driving tool is integral and of a unitary construction.
REFERENCES:
patent: 456300 (1891-07-01), Dawson
patent: 751496 (1904-02-01), Gode
patent: 1530905 (1925-03-01), Nance
patent: 2778396 (1957-01-01), Swain
patent: 5211468 (1993-05-01), Jeng
patent: 5431075 (1995-07-01), Cruz
patent: 5526724 (1996-06-01), Bruggeman
patent: 5823078 (1998-10-01), Liu
Danganan Joni B.
Hail III Joseph J.
Marrs Roger A.
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