U.S. patent number 3,667,518 [Application Number 05/033,355] was granted by the patent office on 1972-06-06 for screwdriver with bit storing handle.
This patent grant is currently assigned to Gardner-Denver Company. Invention is credited to George B. Stillwagon, Jr..
United States Patent |
3,667,518 |
Stillwagon, Jr. |
June 6, 1972 |
SCREWDRIVER WITH BIT STORING HANDLE
Abstract
A hand tool, in the form of a screwdriver in which a series of
tool bits are stored in longitudinal recesses formed in the outer
circumferential surface of the handle. The tool bits are retained
in the recesses by an elastic O-ring, and may be easily removed by
rolling back the O-ring for snap fitting into the shank portion of
the tool.
Inventors: |
Stillwagon, Jr.; George B.
(Dayton, OH) |
Assignee: |
Gardner-Denver Company (Dayton,
OH)
|
Family
ID: |
21869932 |
Appl.
No.: |
05/033,355 |
Filed: |
April 30, 1970 |
Current U.S.
Class: |
81/460;
16/111.1 |
Current CPC
Class: |
B25G
1/085 (20130101); Y10T 16/444 (20150115) |
Current International
Class: |
B25G
1/08 (20060101); B25G 1/00 (20060101); B25g
001/08 () |
Field of
Search: |
;145/61,62,63
;206/16R,17,DIG.6 ;7/15 ;16/110.5 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
Primary Examiner: Juhasz; Andrew R.
Assistant Examiner: Koczo, Jr.; Michael
Claims
I claim:
1. A screwdriver having bit storage means for storing a plurality
of selectable screwdriver bits for ready access and having an
elongated shank projecting from said handle defining a driving
coupler on the remote end thereof for selectively receiving said
bits for use, the improvement in said bit storage means comprising
means in said handle defining a plurality of radially
outwardly-opening bit-receiving recesses, each of said recesses
being oriented generally longitudinally of said handle and
peripherally spaced about said handle, the depth of said recesses
being somewhat less than the radial thickness of said bits so that
a portion of the associated said bit in each said recess projects
somewhat radially of said recess, means in said handle defining a
circumferential groove in intersecting relation to said recesses,
an elastic band mounted in said groove having a circumference which
is slightly less than that of said handle so as to bear radially
against bits in said recesses for retaining the same, said band
being deformable and movable out of said groove upon the
application of an axial deforming force to permit insertion and
removal of said bits with respect to said recesses.
2. The screwdriver of claim 1 in which said elastic band comprises
an elastomeric O-ring.
3. The screwdriver of claim 1 in which said handle has an outer
gripping surface, means in said handle defining a corresponding
plurality of longitudinally-extending flutes in said outer surface,
and in which said recesses project inwardly of said flutes.
Description
BACKGROUND OF THE INVENTION
Many hand tools, such as crew drivers and the like, have been
proposed in which one or more interchangeable driving bits are
stored in the tool handle. For example, U.S. Pat. No. 707,901 shows
a hand tool having longitudinally extending grooves for receiving
the tool bits. The tool bits are inserted axially through the end
portion of the tool handle and are exposed through narrow slots
formed by the grooves. The tool bits cannot fall out of the grooves
since the slot formed by the groove is narrower than the diameter
of the tool bit.
In U.S. Pat. No. 2,337,514 there is disclosed a tool handle having
longitudinally extending compartments completely enclosed in the
handle. The tool bits stored in these compartments are accessible
by rotating a disk positioned between the end of the handle and a
cap covering the disk. The disk has one hole in it, while the cap
has a plurality of holes corresponding to the compartments. When
the hole in the disk is aligned with the desired compartment, the
hand tool is tipped so that the handle is pointed downwardly, and
the particular bit is removed axially from its compartment. A
similar hand tool is disclosed in U.S. Pat. No. 648,589 in which an
end cap is rotatable with respect to the hand tool and disk. The
cap has one hole for communication with cavities within the handle,
and is spring biased away from the handle to retain the cap in any
desired position of rotation.
In the aforementioned patents, the forming of the tool bit storage
cavity by drilling or other means constitutes an additional step
from the manufacture of the handle itself. Accordingly, the cost of
production of these hand tools is significantly increased.
SUMMARY OF THE INVENTION
The present invention provides a tool handle having an outer
gripping surface formed with a series of longitudinally extending
flutes. A recess is formed inwardly of each flute and is adapted to
receive a tool bit. The tool bits are retained in their respective
recesses by an elastic resilient O-ring received within a
circumferential groove formed about the tool handle. The groove is
longitudinally positioned on the handle such that the O-ring
overlies the recesses, and the depth of the groove is such that the
O-ring is stretched over the bits when they are inserted in their
respective recesses and thus retains the tool bits therein. One end
of a drive shank is received in an end of the handle while the
other end of the shank has a coupling or socket secured thereto for
receiving a tool bit.
A tool bit stored in one of the recesses may easily be removed by
rolling the O-ring rearwardly away from the recess. The tool bit
may then be radially extracted from the recess, or the tool handle
may be rotated so that the tool bit drops out of the recess. During
the removal or insertion of a tool bit into the recess, the O-ring
is retained in the other circumferential portions of the groove
extending between the axial flutes. The socket or coupling means on
the end of the shank is adapted to receive and retain a tool bit in
a snap fit arrangement.
The preferred embodiment of the invention is described in terms of
a handle having a series of circumferentially spaced longitudinally
extending flutes within which the bit-receiving recesses are
formed. These flutes assist in forming a good gripping surface for
the handle. However, the invention is not intended to be limited
thereto and the bit receiving recesses may be formed in the outer
surface of the gripping handle without relation to such flutes.
Further, in the preferred embodiment, the bit receiving recesses
are formed adjacent the forward portion of the handle and in this
manner are substantially out of the way of the normal useage of the
tool and therefore do not interfere with the useage of the tool. In
this position, the elastomeric ring is positioned such that it may
be readily engaged by the thumb of the user and rolled in either
direction to permit extraction of one or more of the bits.
It is accordingly an important object of the present invention to
provide a screwdriver or other driving tool in which a handle has
provision for storage of a plurality of individually selectable
bits, the storage means comprising recesses in the outer
circumference of the handle which are radially open and which
permit a radial insertion and extraction of the bit.
A further object is the provision of a driver, as outlined above,
in which a simple elastomeric member is received in circumferential
relation to the handle and which retains a series of bits within
recesses formed within the handle and which may be retracted to
permit withdrawal or insertion of any one of the bits.
These and other objects and advantages of the present invention
will become apparent from the following description, the
accompanying drawing and the appended claims.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a perspective view of the hand tool;
FIG. 2 is a fragmentary view of the handle portion;
FIG. 3 is a partial cross-sectional view of the handle portion;
and
FIG. 4 is a cross-sectional enlarged end view taken generally along
line 4--4 of FIG. 3.
DESCRIPTION OF THE PREFERRED EMBODIMENT
A hand tool, illustrated in the form of a screw driver, includes an
elongated handle 12 which is preferably molded of plastic material
and has a generally cylindrical outer gripping surface 14 extending
between radial end surfaces 15 and 16. A plurality of peripherally
spaced and longitudinally extending flutes 18 are formed within the
outer surface 14 of the handle to facilitate firm gripping of the
handle. A longitudinally extending elongated cavity or recess 20 is
formed within the forward end portion of each of the flutes 18 and
projects inwardly from the bottom surface of the flute by a
distance approximately equal to the depth of the flute 18 from the
surface 14. While not shown in FIGS. 1 and 2, the recesses 20 may
vary in length according to the length of the bit, and each recess
has rounded end surfaces.
The recesses 20 are adapted to receive a series of hardened steel
tool bits 22-25, and the length of each recess 20 corresponds
generally with the length of the corresponding tool bit. As shown
in FIG. 1, the bit 22 is designed for driving slotted-head screws,
and bits 23 and 25 are adapted for driving Phillips head screws.
While each of the tool bits 22-25 has a hexagonal cross-sectional
configuration, it is to be understood that tool bits of other
configurations may be stored within the recesses 20.
A generally circumferentially extending groove 28 is formed within
the outer surface 14 of the handle 12 and receives an elastic and
resilient O-ring 30. The groove 28 is positioned longitudinally on
the handle 12 and has a sufficient depth so that the O-ring 30
extends laterally across each of the tool bits 22-24 and is
elastically deformed over the bits to retain the tool bits within
their corresponding recesses.
As illustrated by the tool bit 25 in FIG. 1, each of the bits 22-25
is adapted to be received within a tubular coupling or socket 35
secured to the outer end portion of an elongated hexagonal shank 36
having an inner end portion extending axially into the handle 12
through the end surface 15. Preferably, the socket 35 is
constructed as shown in the Clark U.S. Pat. No. 2,550,775 to
provide for magnetizing the selected tool bit. The bit is retained
by a snap fitting connection such as shown in U.S. Pat. No.
2,522,217.
When it is desired to interchange tool bits, the tool bit retained
by the socket 35 is removed and is inserted in its corresponding
recess 20 simply by rolling the adjacent overlying portion of the
O-ring 30 rearwardly out of the groove 28 and onto the surface 14
with the thumb as shown in FIG. 2. After the bit is placed within
its recess, the O-ring 30 is released so that it snaps back into
the groove 28. A similar procedure is used in removing one of the
tool bits from its corresponding recess 20. That is, the handle 12
is turned until the selected tool bit is generally on top. The
adjacent portion of the O-ring 30 is then retracted (FIG. 2), and
the handle is rotated or turned to enable the selected bit to drop
radially from its recess into the other hand. The selected bit is
then snap-fitted into the socket 35.
From the drawing and the above description, it is apparent that a
hand tool constructed in accordance with the present invention
provides desirable features and advantages. For example, by storing
and retaining a series of different tool bits within corresponding
recesses formed within the outer gripping surface of the tool
handle, and by employing an elastic retainer ring, the tool bits
can be quickly and conveniently interchanged. That is, by simply
rolling back a portion of the elastic O-ring 30, a tool bit may be
quickly and conveniently inserted or removed by a generally radial
movement from its corresponding recess. Moreover, the
circumferential interruptions within the groove 28 produced by the
flutes 18, are effective to assure that a portion of the O-ring 30
remains in the groove 28 when another portion of the O-ring is
rolled from the groove. As a result, only the selected recess is
opened when the adjacent portion of the O-ring is rolled rearwardly
from the recess.
The hand tool thus described can be easily and efficiently
manufactured. Since the flutes and recesses are on the outer
surface of the handle 12, the hand tool can be manufactured by use
of a mold or die having appropriate projections in the mold to
readily form the desired grooves, flutes and recesses. The use of
such a mold provides for efficient and low cost production of the
hand tool.
While the article herein described constitutes a preferred
embodiment of the invention, it is to be understood that the
invention is not limited to this precise hand tool article, and
that changes may be made therein without departing from the scope
of the invention which is defined in the appended claims. For
example, while the recesses 20 are preferably formed within the
bottom surfaces of the flutes 18 and project inwardly from the
flutes, it is within the scope of the invention to form the recess
20 directly within the outer surface 14 of the handle 12.
Furthermore, while the O-ring is the preferred means for retaining
the tool bits within the recesses 20, it is to be understood that
another form of retaining means may be used. For example, a coil
tension spring having opposite ends connected to form an annular
ring might be used in place of the rubber O-ring 30. It is also
within the scope of the invention for the tool bits 22-25 to
comprise socket bits or Allen bits. Although shank 36 is shown to
connect socket or coupling 35 to handle 12, it is to be understood
that shank 36 can be omitted, and socket 35 secured directly to
handle 12 to form a shorter hand tool. While the location of the
recesses and elastic retainer O-ring are shown adjacent to the
forward end 15 to facilitate gripping the tool handle, the recesses
and O-ring may be located anywhere along the length of the
handle.
While the form of apparatus herein described constitutes a
preferred embodiment of the invention, it is to be understood that
the invention is not limited to this precise form of apparatus and
that changes may be made therein without departing from the scope
of the invention which is defined in the appended claims.
* * * * *