Torque-tool grip, torque tool and method

Details Torque-tool grip, torque tool and method Torque-tool grip, torque tool and method

1999-06-07

2001-02-20

Eley, Timothy V. (Department: 3723)

Tools

Handle for tool

C081S177100

Reexamination Certificate

active

06189423

ABSTRACT:

BACKGROUND OF THE INVENTION
Tools such as screwdrivers and nut drivers are implemented by hand rotation about an axis. This rotation axis is normally the longitudinal axis of the tool. The tool normally has a handle (or handgrip) end and a working (or tool) end. The working member often includes a shaft or shank bridging the handle and a tool element, the handle being connected or joined to such shaft or shank. The handle is rotated or torqued to transfer the applied torquing forces to the shank and tool element. Improved torque capabilities or efficiencies is desirable to increase the torquing forces transferred to shank and tool element for a given handle rotation effort or exertion.
It is also desirable to readily spin a screwdriver and the like about the rotation axis when only a low degree of torque is required for a task. Improved downward pressure (or driving) capabilities is also desirable.
BRIEF SUMMARY OF THE INVENTION
The present invention is a handgrip for a torque tool, such as a screwdriver, that provides enhanced tool torque capabilities and improved driving capabilities. The handgrip has a top or free-end segment available for low-torque twirling action using the fingertips, and a bottom or working-end segment that together with the top segment is grasped in one's hand for high torque application. The handgrip has a configuration approaching that of a three-sided bell that provides finger holds, bearing surfaces, and outlying lobes which alone or in combination improve torque capabilities and/or driving capabilities for the effort applied. The invention is also a torque tool that includes such a handgrip and has enhanced tool torque capabilities and improved driving capabilities. The present invention is also method of using such a torque tool whereby enhanced tool torque capabilities and improved driving capabilities are realized.


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patent: 4768409 (1988-09-01), Fitzwater
patent: 4922575 (1990-05-01), Riemann
patent: 4969231 (1990-11-01), Mader et al.
patent: 5390572 (1995-02-01), Gakhar et al.
patent: 5556092 (1996-09-01), Theken
patent: 5722116 (1998-03-01), Lin

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