Tools – Wrench – screwdriver – or driver therefor – Handle or shank
Reexamination Certificate
1998-07-30
2001-04-03
Scherbel, David A. (Department: 3723)
Tools
Wrench, screwdriver, or driver therefor
Handle or shank
C081S177100
Reexamination Certificate
active
06209425
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a driving device for hexagonal wrenches of various sizes.
2. Description of the Related Art
Hexagonal wrenches (i.e., Allen wrenches) are used to tighten or fasten bolts or screws of the type having a hexagonal socket in a head portion thereof. However, direct manual operation of the hexagonal wrench is inconvenient, and the six sharp edges of the hexagonal wrench may cause pain to the user's fingers. Devices have been proposed to hold and drive hexagonal wrenches, yet the holding effect is found unsatisfactory as the driving devices merely hold one end of the hexagonal wrench to be operated. The present invention is intended to provide an improved device to solve these problems.
SUMMARY OF THE INVENTION
It is a primary object of the present invention to provide an improved driving device that may hold both of a relatively longer section and a relatively shorter section of a hexagonal wrench to be operated.
A driving device in accordance with the present invention is provided for holding and driving a hexagonal wrench having two angled sections. The driving device comprises a hollow holding member including two portions. One portion of the hollow holding member has a retaining section formed on an intermediate section of an inner periphery thereof. The retaining section includes two mutually facing stepped surfaces that together define a tapered space therebetween for securely holding one of the angled sections of the hexagonal wrench. The stepped surfaces consist of consecutively connected step sections of different lengths, the stepped surfaces defining the tapered space being configured by a plurality of aligned and partially overlapped hexagons of different sizes that are aligned in sequence according to the sizes thereof such that the two mutually facing stepped surfaces are capable of holding hexagonal wrenches of various sizes. The other portion of the holding member includes a bottom wall that includes a notch defined therein for securely holding the other of the angled sections of the hexagonal wrench.
The notch has a central recessed section and two rectilinear sections provided on two sides of the central recessed section, respectively.
The holding member may further include a second retaining section formed on an outer periphery thereof. The second retaining section includes a plurality of spaced longitudinal grooves that extend along a longitudinal direction of the holding member for receiving said one of the angled sections of the hexagonal wrench. In addition, an outer sleeve may be mounted around the holding member to enclose the second retaining section of the holding member.
In an embodiment of the invention, a driving device is provided for holding and driving a hexagonal wrench having two angled sections. The driving device comprises a hollow holding member including two portions and a retaining section formed on an intermediate section of an inner periphery thereof and thus defining two chambers in the ends of the holding member, respectively. The retaining section includes two mutually facing stepped surfaces that together define a tapered space therebetween for securely holding one of the angled sections of the hexagonal wrench. Each end of the holding member further includes a bottom wall that defines a portion of an associated chamber. Each bottom wall includes a notch defined therein for securely holding the other of the angled sections of the hexagonal wrench. Each notch has a central recessed section and two rectilinear sections provided on two sides of the central recessed section, respectively.
The holding member further includes a second retaining section formed on an intermediate section of an outer periphery thereof. The second retaining section includes a plurality of spaced longitudinal grooves that extend along a longitudinal direction of the holding member for receiving said one of the angled sections of the hexagonal wrench. An outer sleeve is mounted around the holding member to enclose the second retaining section of the holding member.
In a second embodiment of the invention, a driving device is provided for holding and driving a hexagonal wrench having two angled sections. The driving device comprises a hollow holding member including a retaining section formed on an inner periphery thereof. The retaining section includes two mutually facing stepped surfaces that together define a tapered space therebetween for securely holding one of the angled sections of the hexagonal wrench. An outer sleeve is securely mounted around the holding member. The outer sleeve includes a bottom wall adjacent to the holding member. The bottom wall includes a notch defined therein for securely holding the other of the angled sections of the hexagonal wrench. The notch has a central recessed section and two rectilinear sections provided on two sides of the central recessed section, respectively. The holding member further includes a second retaining section formed on an intermediate section of an outer periphery thereof. The second retaining section includes a plurality of spaced longitudinal grooves that extend along a longitudinal direction of the holding member for receiving said one of the angled sections of the hexagonal wrench.
REFERENCES:
patent: 1172656 (1916-02-01), Yorgensen
patent: 2870809 (1959-01-01), Feldman et al.
patent: 3850056 (1974-11-01), Allen
patent: 4308770 (1982-01-01), MacDonald
patent: 5592859 (1997-01-01), Johnson et al.
patent: 5765454 (1998-06-01), Barbulescu et al.
Baxley Charles E.
Danganan Joni B.
Scherbel David A.
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