WO1999011213A1

WO1999011213A1 - Interchangeable cutting tools

Info

Publication number: WO1999011213A1
Application number: PCT/IL1998/000412
Authority: WO
Inventors: Mordechai Uzrad
Original assignee: EASYCUT Ltd
Current assignee: EASYCUT Ltd
Priority date: 1997-08-31
Filing date: 1998-08-26
Publication date: 1999-03-11
Anticipated expiration: 2000-02-29
Also published as: IL121667A0; WO1999011213A8; AU8884098A

Abstract

An interchangeable cutting and pruning tool (10) is provided. The tool (10) includes a tool body (12) having an elongated shank (14) connected thereto, the shank (14) being configured to be cooperatively coupled or mounted to an operable tool, at least one cutting device (16) integrally formed with the tool body (12) and at least one secondary element (18) integrally formed with the tool body (12).

Description

INTERCHANGEABLE CUTTING TOOLS

FIELD OF THE INVENTION

The present invention relates to cutting devices generally and more particularly to interchangeable tools for pruning and the cutting of vegetation and shrubs.

BACKGOUND OF THE INVENTION

There are numerous types of cutting and pruning devices which are used for pruning shrubs, roses and for harvesting of fruit. Generally such devices are used with one hand to cut the hedge, shrub and the like and the severed material is allowed to fall to the ground for later collection and disposal. Alternatively, the cut material is held by the other hand and disposed of immediately. Generally, these devices have two blades or jaws actuated towards each other by handles for cutting purposes.

There are also tools which include retaining means to hold the cut portion instead of allowing the are also known in the art. The retaining means, which holds the cut portion within the device, commonly have some relationship with the blades and are operable to hold the severed portion against one of the blades.

Commonly, a specific cutting or pruning tool is used for each type of pruning and harvesting operation. Thus, the user needs to carry several different implements in order to cut different types of trees and shrubs.

Though different tools have advantages for different uses, existing pruning tools are not ideally suited for cutting of vegetation. SUMMARY OF THE INVENTION

An object of the present invention is to provide an improved cutting and

pruning tool.

A further object of the invention is to provide plurality of cutting and

pruning tool which can be interchangeably used with manual or power driven

operating tool.

There is thus provided, in accordance with a preferred embodiment of

the present invention, an interchangeable cutting and pruning tool, which includes

a tool body having an elongated shank connected thereto, the shank being

configured to be cooperatively coupled or mounted to an operable tool, at least

one cutting device integrally formed with the tool body and at least one secondary

element integrally formed with the tool body.

Furthermore, in accordance with a preferred embodiment of the present

invention, the tool body is a generally cylindrical element having a first longitudinal

axis.

Furthermore, in accordance with a preferred embodiment of the present

invention, the cutting device includes a blade assembly having two edges, at least

one of which is a cutting edge.

Additionally, in accordance with a preferred embodiment of the present

invention, the secondary element may include a blade assembly having two

edges, at least one of which is a cutting edge. The cutting edge includes one of a

group including a saw tooth profile and a knife blade. Furthermore, in accordance with a preferred embodiment of the present

invention, the blade assembly has a configuration which includes one of a group

including a generally flat elongated shape, a spade shape, a "Z" (dogleg) shape, a

curved or dagger shape.

Furthermore, in accordance with a preferred embodiment of the present

invention, the shank extends along a second longitudinal axis and the second

longitudinal axis lies along the same axis as the first longitudinal axis of the tool

body.

In addition, in accordance with a preferred embodiment of the present

invention, the cutting device extends along a third longitudinal axis and wherein

the third longitudinal axis lies along the same axis as either the first or the second

longitudinal axis. The second longitudinal axis and/or the third longitudinal axis

may be parallel with the first longitudinal axis.

In addition, in accordance with a preferred embodiment of the present

invention, the secondary element extends along a fourth longitudinal axis which

lies along the same axis as either the first or second longitudinal axis. The fourth

longitudinal axis is parallel with the first longitudinal axis.

Furthermore, in accordance with a preferred embodiment of the present

invention, the shank is located on the perimeter of the tool body.

Furthermore, in accordance with a preferred embodiment of the present

invention, the cutting device and/or the secondary element are located on the

circumference or perimeter of the tool body. Additionally, in accordance with a preferred embodiment of the present

invention, the at least one cutting device and/or the at least one secondary

element extend along the first axis from the center of the tool body.

Furthermore, in accordance with a preferred embodiment of the present

invention, the interchangeable tool further includes at least one adjustable screw

attachable to either of the at least one cutting device and/or the at least one

secondary element and which is operable to move the corresponding the at least

one cutting device or the at least one secondary element thereby to alter the

diametrical distance between them.

Furthermore, in accordance with a preferred embodiment of the present

invention, the cutting device and/or the secondary element are generally curved to

conform to the circumference of the tool body.

In addition, in accordance with a preferred embodiment of the present

invention, the secondary element includes a flat plate pivotally attached to the tool

body. The secondary element further includes at least one blade attached to the

flat plate.

Furthermore, in accordance with a preferred embodiment of the present

invention, the operable tool includes a tool having at least one of the following

group of actions including rotatable, hammer and impact power tools. The power

tools may be powered by any of a group selected from pneumatic, electrical,

hydraulic, mechanical, dry cell batteries and cordless.

Additionally, in accordance with a preferred embodiment of the present

invention, the cutting device is operable to rotatable cut an object positioned between the cutting device and the secondary element. The secondary element

acts to restrain the object while the cutting device cuts through the object to sever

it from its base.

Furthermore, in accordance with a preferred embodiment of the present

invention, the tool body includes a rotating element attached to the shank and a

fixed element coupled to the rotating element. The cutting device is attached to

the rotating element and the secondary element is attached to the fixed element.

Furthermore, in accordance with a preferred embodiment of the present

invention, the at least one secondary element includes an anvil attachment is

pivotally attached to the tool body. The anvil attachment includes a flat plate

attached thereto.

Furthermore, in accordance with a preferred embodiment of the present

invention, the anvil attachment includes a plurality of grooves formed along one

edge thereof.

Additionally, in accordance with a preferred embodiment of the present

invention, the anvil attachment further includes at least one cutting element

attached to the plate.

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention will be understood and appreciated more fully

from the following detailed description taken in conjunction with the appended

drawings in which: Figs. 1A, 1B and 1C are top, side and front elevational views,

respectively, of an interchangeable cutting and pruning tool, constructed and

operative according to a preferred embodiment of the present invention;

Fig. 2 is an illustration of the tool of Fig. 1 coupled to an operable

portable tool; Figs. 3A, 3 B and 3C illustrate the action of pruning utilizing the tool of

Fig. 1;

Figs 4A, 4B and 4C are top, side and front elevational illustrations,

respectively, of an interchangeable cutting and pruning tool, constructed and

operative according to a further preferred embodiment of the present invention;

Figs 5A and 5B are top and front elevational illustrations, respectively, of

an interchangeable cutting and pruning tool, constructed and operative according

to a further preferred embodiment of the present invention;

Figs 6A and 6B are top and front elevational illustrations, respectively, of

to a further preferred embodiment of the present invention;

Figs 7A, 7B and 7C are top and front elevational illustrations,

respectively, of an interchangeable cutting and pruning tool, constructed and

operative according to a further preferred embodiment of the present invention; Figs. 8A, 8B, 8C, 8D, 8E and 8F are illustrations of a plurality of blades

compatible with any of the embodiments described herein;

Figs 9A and 9B are top and front elevational illustrations, respectively, of

to a further preferred embodiment of the present invention;

Figs 10A, 10B, 10C, 10D, 10E and 10F illustrate the operation of an

interchangeable cutting and pruning tool, constructed and operative according to

a further preferred embodiment of the present invention;

Fig 11 is an illustration of an interchangeable cutting and pruning tool,

constructed and operative according to a further preferred embodiment of the

present invention;

Figs. 12A, 12B, 12C and 12D are elevational illustrations of an

a further preferred embodiment of the present invention; and

Figs. 13A and 13B is an alternate configuration of cutting and pruning

tool of Figs. 12A-12D.

DETAILED DESCRIPTION OF THE PRESENT INVENTION

Reference is now made to Figs. 1A -1 C which illustrate top, side and

front elevational views, respectively, of an interchangeable cutting and pruning

tool, generally referenced 10, constructed and operative according to a preferred

embodiment of the present invention.

Cutting and pruning tool 10 comprises a tool body 12 having an

elongated shank 14 connected thereto. At least one cutting device 16 and at

least one secondary element 18 are integrally formed with tool body 12. The

prime function of secondary element 18 is to act as a stopper during the pruning

or cutting operation of cutting device 16.

It is a feature of the present invention that shank 14 is configured to be

cooperatively coupled or mounted to a manually or electrically operated portable

tool, generally designated 50, which is illustrated in Fig. 2. The operating tool 50

may be any commercially available power tool. The versatility and capability of

the interchangeable tools are only restricted by the type of power tool 50 being

used. A power tool which can be used for hammering and impact work as well as

rotation may be used with any of the embodiments of interchangeable tools

described hereinbelow. Fig. 2 illustrates a power tool 50 which can be pivoted,

thereby further improving the versatility of the various interchangeable tools.

For the purposes of example only, and without in any way limiting the

invention, tool body 12 is illustrated as a generally cylindrical element having a

longitudinal axis, referenced 20. Shank 14 has a second longitudinal axis, referenced 22 and, in the

embodiment illustrated in Figs. 1A - 1 C, is centrally attached to body 12 so that its

longitudinal axis 22 lies along the same axis as longitudinal axis 20 of body 12.

Cutting device 16 comprises a blade assembly 24 extending forwardly in

a lengthwise direction having two edges 26 and 28, at least one of which is a

cutting edge. As best seen in Fig. 1 B, edge 26 comprises a blade having a saw

tooth profile while edge 28 comprises a generally straight knife blade.

In operation, upon activation by operating tool 50, shank 14 is rotatable

(clockwise or counter-clockwise) about axis 22. The tool body 12, is thus,

rotatable about its longitudinal axis 20, thereby rotatably moving cutting device 16

about an arc defined by the circumference (referenced 30) of tool body 12.

Reference is now made to Figs. 3A - 3C, which illustrates the action of

pruning a branch 60. Pruning tool 10 is positioned so that branch 60 is positioned

between cutting device 16 and element 18 (Fig. 3A). As the tool body 12 rotates,

branch 60 initially becomes trapped between cutting device 16 and element 18

(Fig. 3C). Continuing rotation causes cutting device 16 to sever branch 60 while

element 18 stops the branch 60 from moving.

Alternatively, by reversing the rotation of cutting device 16, edge 26

having a saw tooth blade comes into contact with the object for sawing.

Reference is now made to Figs 4A - 4C which illustrate top, side and

tool, generally referenced 100, constructed and operative according to a further

preferred embodiment of the present invention. Elements of this embodiment of the invention are similar to elements

which have been previously described with respect to the preferred embodiment

of Figs. 1A - 1C, are similarly designated and will not be further described.

Cutting and pruning tool 100 comprises a tool body 12 having an

elongated shank 14 connected thereto, first and second cutting devices 102a and

102b, respectively, which are integrally formed with tool body 12.

First and second cutting devices 102a and 102b, respectively, are

similar to cutting device 16 (Fig. 1 B). The suffixes a and b distinguish elements of

first and second cutting devices 102a and 102b, respectively.

First and second cutting devices 102a and 102b each comprises a

blade assembly 24, extending forwardly in a lengthwise direction. Each blade

assembly 24 has two edges, a saw tooth blade (edge 26) and a knife-like cutting

edge (edge 28). In the embodiment of Figs. 4A-C, the edges of first and second

cutting devices 102a and 102b, respectively, are positioned so that cutting edge

28a of blade 102a is adjacent to saw tooth 26b of blade 102b.

It will be appreciated that one of the blades may be reversed so that

cutting edge 28a is adjacent to cutting edge 28b. Alternatively, each of the cutting

devices 102a and 102b may comprise two cutting edges or two saw-tooth edges.

In either of these configurations, the cutting action of cutting device

102a (or 102b) is similar to the cutting action of cutting device 16 (Figs. 3A - 3B).

That is, as tool body 12 rotates, a branch becomes trapped between first cutting

device 102a and second cutting device 102b. In this embodiment, second cutting device 102b acts as the "stopper" preventing the branch from moving while first

cutting device 102a severs the branch.

Alternatively, first cutting device 102a acts as the "stopper" preventing

the branch from moving while second cutting device 102b severs the branch.

Alternatively, by reversing the rotation of tool 100 the saw tooth blade of

first and second cutting devices 102a and 102b, respectively may be used for

sawing.

It will be appreciated by persons skilled in the art that numerous

variations may be added in a similar manner to any of the embodiments of the

present invention described hereinabove. For example, in an alternative

embodiment of an interchangeable cutting and pruning tool, generally referenced

200, illustrated in Figs. 5A and 5B, one of the cutting devices, referenced 202 is

integrally formed in the center of the tool body 12, extending along longitudinal

axis 20. The second cutting device 204 is similar to cutting device 18 of Fig. 1A

and is located proximate to the circumference of tool body 12.

In a further alternative embodiment of an interchangeable cutting and

pruning tool, generally referenced 300, illustrated in Figs. 6A and 6B, the stopper

element, referenced 302 is integrally formed in the center of tool body 12,

extending along longitudinal axis 20. In this embodiment, cutting is performed by

cutting device 304 located proximate to the circumference of tool body 12.

Cutting device 304 is similar to cutting device 18 of Fig. 1A.

Reference is now made to Figs. 7A - 7C, which illustrate a further

embodiment of an interchangeable cutting and pruning tool, generally referenced 400. Tool 400 is similar to tool 300 having a stopper element, referenced 402

integrally formed proximate to the center of tool body 12 while cutting is performed

by cutting device 404 located proximate to the circumference of tool body 12.

Cutting device 304 is similar to cutting device 18 of Fig. 1A.

In the embodiment of Figs. 7A-7C, stopper element 402 comprises a

generally "Z" (or dogleg) shape so that is effectively eccentrically fixed to body 12.

Figs. 7A and 7B are top and side view illustrations of the cutting

operation of pruning tool 400. Pruning tool 400 is shown in the operation of

harvesting a fruit, referenced 406. As best seen in Fig. 7B, the stem of fruit 406 is

stopped from moving by stopper 402 while the action of rotating the tool 400 in a

counter-clockwise direction brings cutting element 404 into position ready to cut

the fruit off the stem. Continuing rotation of tool 400 severs the fruit 406 off the

stem, as shown in Fig. 7C.

Reference is now made to Figs. 8A-8F, which illustrate a plurality of

blades, referenced 40, 50, 60, 70, 80, and 90, respectively, which are

representative, but non-limiting examples of the types of cutting elements (blades)

which may be adapted to the tool body 12 of any of the embodiments of

interchangeable cutting and pruning tools described hereinabove.

Blade 40 comprises an edge 42 having a saw tooth profile and a second

edge 44 having a generally straight knife blade. Blade 50 comprises an edge 52

having a saw tooth profile and a second edge 54 having a generally "Z" shape (or

'dogleg') knife blade. Blade 60 comprises a pair of edges 62 and 64, each having a saw tooth

profile. Blade 70 comprises a pair of edges 72 and 74, each having a generally

straight knife blade. Blade 80 comprises a double edged knife blade 82, each

edge being similar to edge 54 of blade 50. Blade 90 comprises a "spade" shaped

double edged knife blade 92.

It will be appreciated by persons skilled in the art that the knife blades

referenced 44, 72 or 74 or any of the knife blades, referred to hereinabove are not

restricted to having "straight" edges but may comprise any suitable form including

curved or dagger shape.

It will be further appreciated that any of the hereinabove referenced

blades, including knife, saw-tooth or stopper elements are not limited to extending

forwardly from the tool body 12 (that is, parallel to longitudinal axis 20) but may be

angled with reference to longitudinal axis 20.

Reference is now briefly made to Figs. 9A-9B, which illustrate a further

alternative embodiment of an interchangeable cutting and pruning tool, generally

referenced 500. Cutting and pruning tool 500 is similar to tool 100 which has

been previously described with respect to the embodiment of Figs. 4A - 4C, with

the addition of a pair of adjustable screws, referenced 504a and 504b, which are

operable to move elements 102a and 102b relative to each other, as indicated by

double-headed arrow 502. Thus, tool 500 can be used to reduce the distance

between elements 102a and 102b to accommodate different sizes of branches

and stems for cutting. A further embodiment illustrating a double cutting action is shown in

Figs. 10A-10F, to which reference is now made. Figs. 10A, 10B and 10C illustrate

the top, side and elevational views, respectively, of an interchangeable cutting

and pruning tool, generally referenced 600, constructed and operative according

to a further preferred embodiment of the present invention.

Pruning tool 600 comprises first and second cutting blades 602 and 603,

respectively, integrally formed with the tool body 12. First and second cutting

blades 602 and 603, respectively, are generally curved to conform to the

circumference of the tool body 12. First blade 602 is located on the circumference

while second blade 603 is located within the same semi-circular arc 604 but inset

slightly from the circumference so as not to interfere with the movement of the first

blade 602. Figs. 10A, 10B and 10C illustrate tool 600 positioned ready to sever

the stem 608 of a fruit, referenced 610.

Pruning tool 600 comprises a tool body 612 having an elongated shank

14 connected thereto. Tool body 612 comprises a rotating element 614 attached

to the shank 14 and a fixed element 616 coupled to rotating element 614. First

cutting blade 602 is attached to rotating element 614 and second cutting blades

603 is attached to fixed element 616.

Figs. 10D, 10E and 10F illustrate the top, side and elevational views,

respectively, of cutting tool 600 in operatively severing stem 608 from fruit 610.

Rotation of tool 600 in a counter-clockwise direction (indicated by arc 618)

actuates first blade 602 attached to rotating element 614. Second blade 603,

which is attached to fixed element 616, does not move and acts as a stopper. It will be appreciated by persons skilled in the art that the present

invention is not limited to the shank of any of the interchangeable tool

embodiments described hereinabove being centrally located along axis 20 (Fig. 1)

but that the shank can be eccentrically positioned on the circumference of tool

body 12. An example of an eccentrically located shank is illustrated in the

embodiment of a cutting tool 700, of Fig. 11 , to which reference is briefly made.

Cutting tool 700 comprises a cutting device 702 and a stopper element 704, both

being integrally formed with tool body 12 having an eccentrically located shank

706 located on the circumference of tool body 12. Cutting device 702 and stopper

element 704 are similar to cutting device 16 and stopper element 18 described

hereinabove with respect to Fig. 1.

It will also be appreciated that shank 14 is not limited to being centrally

located vis-a-vis the tool body, but may be eccentrically attached to any part of the

circumference (or perimeter) or may be attached to any other part of the body.

It will also be appreciated by persons skilled in the art that the stopper

element may comprise any suitable shape and is not limited to the examples

described hereinabove. For example, the cutting and pruning tool embodiment,

referenced 800, illustrated in Figs. 12A-12D, to which reference is now briefly

made, comprises an anvil attachment 802 and cutting element 804. Cutting

element 804 is similar to cutting device 16, described hereinabove.

Anvil attachment 802 is pivotally fixed to tool body 12 about a pivot point

810. Anvil attachment 802 comprises a flat plate 806 attached thereto. The operating action of tool 800 illustrated with reference to Figs. 12C

and 12D. The fruit or branch 808 to be cut is inserted between the anvil

attachment 802 and cutting element 804 (Fig. 12C). Rotation of tool body 12

actuates cutting element 804 to sever branch 80 while anvil attachment 802 acts

as a stopper. The anvil attachment 802 pivots about its pivot point 810 so that

one corner 812 makes contact with the branch 808 restricting its movement.

The configuration of flat plate 806 is not restricted to a flat plate but may

be configured to incorporate one or more grooves, for example, to improve its grip

on the branch 808.

Reference is now made briefly to Figs. 13A- 13B which illustrate an

alternate configuration of cutting and pruning tool embodiment 800, illustrated

hereinabove with reference to Figs. 12A-12D. In this configuration, plate 806

comprises a knife blade cutting element 820 attached to one end of plate 806 and

a plurality of grooves 822 along the face of the plate 806.

In operation, the knife blade of cutting element 820 comes into contact

with the branch 808 making an initial incision (Fig. 13A). The flat plate 806 acts

as a stopper while cutting element 804 severs the branch from the fruit (Fig. 13B).

It will also be appreciated by persons skilled in the art that the present

invention is not limited by what has been particularly shown and described herein

above. Rather the scope of the invention is defined by the claims which follow:

Claims

1. An interchangeable cutting and pruning tool, comprising :

a. a tool body having an elongated shank connected thereto, said

shank being configured to be cooperatively coupled or

mounted to an operable tool;

b. at least one cutting device integrally formed with said tool body;

and

c. at least one secondary element integrally formed with said tool

body.

2. An interchangeable tool according to claim 1 wherein said tool body is

a generally cylindrical element having a first longitudinal axis.

3. An interchangeable tool according to any of claims 1 - 2 wherein said

at least one cutting device comprises a blade assembly having two

edges, at least one of which is a cutting edge.

4. An interchangeable tool according to any of claims 1 - 2 wherein said

at least one secondary element comprises a blade assembly having

two edges, at least one of which is a cutting edge.

5. An interchangeable tool according to any of claims 3 - 4 wherein said

blade assembly has a configuration comprising one of a group

including a generally flat elongated shape, a spade shape, a "Z"

(dogleg) shape, a curved or dagger shape.

6. An interchangeable tool according to any of claims 3 - 5 wherein said

cutting edge comprises one of a group including a saw tooth profile

and a knife blade.

7. An interchangeable tool according to any of claims 1-6 wherein said

shank extends along a second longitudinal axis and wherein said

second longitudinal axis lies along the same axis as said first

longitudinal axis.

8. An interchangeable tool according to claim 7 wherein said at least one

cutting device extends along a third longitudinal axis and wherein said

third longitudinal axis lies along the same axis as either said first or

said second longitudinal axis.

9. An interchangeable tool according to claim 8 wherein either said

second longitudinal axis and/or said third longitudinal axis are parallel

with said first longitudinal axis.

10. An interchangeable tool according to claim 7 wherein said at least one

secondary element extends along a fourth longitudinal axis which lies

along the same axis as either said first or said second longitudinal

axis.

11. An interchangeable tool according to claim 10 wherein said fourth

longitudinal axis is parallel with said first longitudinal axis.

12. An interchangeable tool according to any of claims 1 - 11 wherein

said shank is located on the perimeter of said tool body.

3. An interchangeable tool according to any of claims 1-12 wherein said

at least one cutting device and/or said at least one secondary element

are located on the circumference or perimeter of said tool body.

14. An interchangeable tool according to any of claims 1- 13 wherein said

at least one cutting device and/or said at least one secondary element

extend along said first axis from the center of said tool body.

15. An interchangeable tool according to any of claims 1-14 and further

comprising at least one adjustable screw attachable to either of said

at least one cutting device and/or said at least one secondary element

and which is operable to move the corresponding said at least one

cutting device or said at least one secondary element thereby to alter

the diametrical distance between them.

16. An interchangeable tool according to any of claims 1-15 and wherein

said at least one cutting device and/or said at least one secondary

element are generally curved to conform to the circumference of said

tool body.

17. An interchangeable tool according to claim 1 wherein said at least one

secondary element comprises a flat plate pivotally attached to said

tool body.

18. An interchangeable tool according to claim 17 wherein said at least

one secondary element further comprises at least one blade attached

to said flat plate.

19. An interchangeable tool according to any of claims 1-18 said

operable tool comprises a tool having at least one of the following

group of actions including rotatable, hammer and impact power tools.

20. An interchangeable tool according to any of claims 1-19 and wherein

said at least one cutting device is operable to rotatable cut an object

positioned between said at least one cutting device and said at least

one secondary element wherein said at least one secondary element

acts to restrain said object while said at least one cutting device acts

to cut through said object.

21. An interchangeable tool according to claim 1 wherein said tool body

comprises:

a. a rotating element attached to said shank; and

b. a fixed element coupled to said rotating element,

wherein said at least one cutting device is attached to said rotating

element and wherein said at least one secondary element is attached

to said fixed element.

22. An interchangeable tool according to claim 1 wherein said at least one

secondary element comprise an anvil attachment is pivotally attached

to said tool body.

23. An interchangeable tool according to claim 22 wherein said anvil

attachment comprises a flat plate attached thereto.

24. An interchangeable tool according to claim 23 and wherein said anvil

attachment comprises a plurality of grooves formed along one edge

thereof.

25. An interchangeable tool according to any of claims 23 -24 and

wherein said anvil attachment further comprises at least one cutting

element attached to said plate.

26. An interchangeable tool according to claim 2 wherein said at least one

secondary element is eccentrically displaced relative to said first

longitudinal axis.

27. An interchangeable tool according to claim 19, wherein said power

tools are powered by any of a group selected from pneumatic,

electrical, hydraulic, mechanical, dry cell batteries and cordless power

tools.