POWER DRIVEN HAMMER
A power hammer apparatus including a cart and a power hammer arrangement mounted at a front region of the cart. The power hammer arrangement including a reciprocating bit that contacts a working surface to break up the working surface as the power hammer is advanced by the power-driven cart.
The principles disclosed relate to the operation and use a tool for loosening and breaking apart flooring material. More particularly, this disclosure relates to the operation and use of a power hammer apparatus.
BACKGROUNDWorking surfaces and flooring are made of a variety of materials, including concrete, wood, and tiling, for example. As the working surface ages, wear and cracks can arise requiring repair and/or replacement of the surface. In repairing or replacing the working surface, large portions, and sometimes the entire working surface, must be removed. Removal of some working surfaces requires the use of a hammer, such as a jackhammer or power driven hammer.
Jackhamnmers and power driven hammers have an aggressive reciprocating bit that is used to loosen or break apart a working surface. As can be understood, operation of such hammers can be physically challenging and labor intensive. In general, improvement has been sought with respect to such machines or tools to better accommodate ease of use.
SUMMARYOne aspect of the present disclosure relates to an arrangement including a power-driven cart and a power hammer arranged to remove or break apart flooring material. Another aspect of the present invention relates to a method of removing or breaking apart flooring material that preferably utilizes a power hammer arrangement advanced by a power-driven cart.
A variety of examples of desirable product features or methods are set forth in part in the description that follows, and in part will be apparent from the description, or may be learned by practicing various aspects of the disclosure. The aspects of the disclosure may relate to individual features as well as combinations of features. It is to be understood that both the foregoing general description and the following detailed description are explanatory only, and are not restrictive of the claimed invention.
BRIEF DESCRIPTION OF THE DRAWINGS
With reference now to the various figures in which identical elements are numbered identically throughout, a description of various exemplary aspects of the present invention will now be provided.
In general, the power hammer apparatus 10 includes a carrier or cart 12 having wheels 14 (only one wheel shown). The cart 12 is preferably a power-driven cart 12. That is, the cart 12 includes a propulsion system, such as a motor and a drive mechanism, that is controlled by an operator during use of the apparatus 10. One suitable power-driven cart is manufactured by NuStar of Shakopee, Minn.
The cart 12 has a front region 16 and a rear region 18. For purposes of clarification, the front region 16 of the power hammer apparatus 10 refers to the portion of the apparatus farthest from the operator during use, and the rear region 18 of the power hammer apparatus 10 refers to the portion of the apparatus closest to the operator during use. A power hammer arrangement 20 is mounted at the front region 16 of the cart 12. During operation of the apparatus 10, the operator drives or advances the power hammer arrangement 20 along a working surface 50 via the power-driven cart 12. One such working surface 50 can include a concrete working surface, for example. The power hammer arrangement 20 is arranged to break up the concrete working surface as the arrangement 20 is advanced by the power-driven cart 12.
Although reference is made throughout the present disclosure to the use of the present apparatus 10 on a concrete working surface, it can be appreciated that the disclosed power hammer apparatus 10 can be used on other types of working surfaces. For example, the power hammer arrangement can be used to break up ceramic tiling or asphalt, or remove linoleum and wood flooring as well.
The cart 12 shown in
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In the illustrated embodiment, the power hammer 40 is an electric, hand-held power hammer having a 35-lb impact rating. Suitable electric, hand-held power hammers are sold by Metabo Inc., of Germany. Such hand-held power hammers generally include a housing 44 having a handle 46, an electric motor contained within the housing 44, and an interchangeable, reciprocating bit 48 powered by the electric motor. The illustrated electric hand-held power hammer 40 also includes an operating switch 52 electrically connected to a power cord 54. In one embodiment, the power cord 54 can be run from the power hammer 40 to a toggle switch 32 located at the rear region 18 of the cart 12. The power cord 54 is electrically connected to the toggle switch 32 so that the operator can operate the power hammer 40 from the rear region 18 of the cart 12. Other hand-held power hammer configurations may be used in accordance with the principles disclosed.
In operation, the operator switches on the power hammer 40 to activate the reciprocating bit 48. The operator then drives the power-driven cart 12 such that the power hammer 40 is advanced along the working surface 50 by the power-driven cart while breaking up the working surface in front of the cart. As can be understood, the large rubber wheels 14 of the cart 12 assist in traversing the loosened or broken up material of the working surface.
The present apparatus 10, including the hand-held power hammer 40 carried and transported during operation by the power-driven cart 12, reduces operator fatigue; yet the operator can still remove the power hammer 40 from the cart 12 to manually operate the hammer in hard to access areas. The removability of the power hammer 40 also permits an operator to easily replace or repair the power hammer. While it is preferred to detachably mount the power hammer 40 to the cart 12, permanent mounting configurations can also be used.
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When the flange 80 is attached to the mounting plate 84, the sleeve 88 (
In the preferred embodiment, the power hammer 40 is pivotally mounted to the power-driven cart 12 by the detachable mounting bracket arrangement 42. That is, preferably, the blade 56 and bit 48 can be selectively oriented at the angle A relative to the working surface 50.
In particular, the mounting bracket arrangement 42 includes first and second pivoting attachments 60, 62 (
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The multiple holes 98 of the primary arms 64, 66 and the pivoting lever arn 100 coupled to the secondary arms 74, 76 define the pivoting attachments 60, 62 that permit a user to selectively pivot the hammer 40. That is, the hammer 40 can be selectively mounted at one of the three holes 98 to adjust the angle A of the bit 48 in relation to the working surface 50.
For example, to operate the apparatus 10 with a less aggressive shearing force, the power hammer 40 is mounted at an uppermost hole of the multiple holes 98 formed in the first and second primary arms 64, 66. This lifts a head portion 108 of the power hammer 40 upward while tilting the nose portion 106 of the power hammer downward to create a large angle A between the reciprocating bit 48 and the working surface. The pivoting lever arm 100 is designed to follow the tilt of the housing 44 corresponding to the selected positioning of the head portion 108 of the power hammer 40. In contrast, to operate the apparatus 10 with a more aggressive shearing force, the power hammer 40 can be mounted at a lowermost hole of the multiple holes 98 formed in the first and second primary arms 64, 66. This lowers the head portion 108 of the power hammer 40 while tilting the nose portion 106 of the power hammer upward to create a smaller angle A between the reciprocating bit 48 and the working surface.
As can be understood, utilizing bits 48 having different shaft lengths also changes the angle A of the blade 56 and the bit 48 relative to the working surface 50. That is, an operator can adjust the angle A of the blade 56 and bit 48 relative to the working surface by using bits with shorter or longer shafts. In the alternative, the operator can adjust the length of the shaft 110 (
While the illustrated embodiment discloses the use of a bit having a single blade 56, other types of tools or bits used in a reciprocating manner can be used. In one alternative embodiment, the bit can include a plow piece located at the end of a shaft. The plow piece can be used to clean joints or cracks formed in a working surface, for example.
Referring back to
Because the cart is automated, that is, power driven, operation of the power hammer is made significantly less laborious than conventional manual operation. The operator can simply walk behind the cart 12 of the power hammer apparatus 10 while controlling the forward drive and direction the power hammer arrangement 20.
As previously described, the devices and methods of the present disclosure can be used in breaking up concrete surfaces. It is contemplated that the principles relating to the disclosed devices and methods can also be used in other applications, such as the removal of carpet, tile, linoleum, wooden flooring, and ice from outdoor surfaces.
The above specification, examples and data provide a complete description of the invention. Since many embodiments of the invention can be made without departing from the spirit and scope of the invention, the invention resides in the claims hereinafter appended.
Claims
1. A power hammer apparatus, comprising:
- a) a power-driven cart having a front region and a rear region, the cart including controls located at the rear region of the cart for driving the cart along a working surface; and
- b) a power hammer mounted at the front region of the power-driven cart, the power hammer including a reciprocating bit that contacts the working surface during operation of the power hammer apparatus.
2. The apparatus of claim 1, wherein the power hammer is a hand-held power hammer mounted at the front region of the power-driven cart.
3. The apparatus of claim 2, wherein the hand-held power hammer includes a housing having a handle portion and an operating switch for use of the power hammer independent of the cart.
4. The apparatus of claim 2, wherein the hand-held power hammer is an electrical power hammer, the operating switch being electrically connected to a power cord.
5. The apparatus of claim 1, wherein the power hammer is pivotally mounted at the front region of the power-driven cart.
6. The apparatus of claim 5, wherein the bit of the power hammer is selectively oriented at an angle of between about 30 degrees and 60 degrees relative to the working surface.
7. The apparatus of claim 5, further including a detachable mounting bracket arrangement configured to pivotally mount the power hammer at the front region of the power-driven cart.
8. The apparatus of claim 7, wherein the detachable mounting bracket arrangement includes first and second primary arms that couple to the power hammer at a pivot location.
9. The apparatus of claim 8, wherein the detachable mounting bracket arrangement further includes a collet that couples around a nose portion of the power hammer.
10. The apparatus of claim 9, wherein the detachable mounting bracket arrangement includes secondary arms, the collet being pivotally connected to the secondary arms of the detachable mounting bracket arrangement.
11. The apparatus of claim 1, further including wheels attached to the power-driven cart, the wheels being located rearward of a center fulcrum of the power-driven cart so that a portion of the cart's weight provides a downward force on the bit of the power hammer.
12. A method of breaking up a working surface, the method comprising the steps of:
- a) coupling a hand-held power hammer to a power-driven cart;
- b) angling the hand-held power hammer in a selected angular orientation relative to a working surface;
- c) securing the hand-held power hammer in the selected angular orientation; and
- d) advancing the power hammer along the working surface with the power-driven cart while operating the secured power hammer, wherein a reciprocating bit of the power hammer contacts the working surface to break up the working surface as the hand-held power hammer is advanced by the power-driven cart.
13. The method of claim 12, wherein the step of operating the power hammer includes switching on a switch of the power hammer, the switch being electrically connected to a power cord.
14. The method of claim 12, wherein the step of angling the hand-held power hammer includes angling the power hammer at an angle of between about 30 degrees and 60 degrees relative to the working surface.
15. The method of claim 12, wherein the step of coupling the hand-held power hammer includes pivotally mounting the hand-held power hammer to a mounting bracket arrangement, and further detachably mounting the mounting bracket arrangement to the power-driven cart.
16. The method of claim 15, wherein the step of securing the hand-held power hammer in the selected angular orientation includes securing the power hammer at one of a plurality of pivot location defined by the mounting bracket arrangement.
17. The method of claim 15, wherein the step of pivotally mounting the hand-held power hammer to the mounting bracket includes positioning a pivoting collet about a nose portion of the power hammer.
18. A method of breaking up a working surface, the method comprising the steps of:
- a) providing a power-driven cart having a front region and a rear region, the power-driven cart further including mechanically-driven wheels and operating controls that control the drive of the mechanically-driven wheels, the operating controls being located at the rear region of the cart;
- b) providing a power hammer mounted at the front region of the cart;
- c) securing the power hammer in a selected angular orientation relative to a working surface; and
- d) advancing the power hammer along the working surface with the power-driven cart while operating the secured power hammer, wherein a reciprocating bit of the power hammer contacts the working surface to break up the working surface as the power hammer is advanced by the power-driven cart.
19. The method of claim 18, further including operating the power hammer independent of the cart.
Type: Application
Filed: Mar 31, 2006
Publication Date: Oct 4, 2007
Inventor: Joseph Due (Mauston, WI)
Application Number: 11/278,311
International Classification: E21C 25/00 (20060101);