WO2022079495A1

WO2022079495A1 - A demolition hammer

Info

Publication number: WO2022079495A1
Application number: PCT/IB2021/050061
Authority: WO
Inventors: Pranil Wasudeo Tiwaskar
Original assignee: Pranil Wasudeo Tiwaskar
Priority date: 2020-10-13
Filing date: 2021-01-06
Publication date: 2022-04-21

Abstract

A demolition hammer is disclosed. The hammer includes a hollow body of a pre-defined shape. The hammer also includes a supporting means partially housed within the hollow body at a first end. The hammer also includes a nail bit operatively coupled to a first end of the supporting means. The hammer also includes a flywheel holder operatively coupled to a second end of the hollow body. The flywheel holder if configured to hold a flywheel. The flywheel holder comprises a striker and a balancer, wherein the striker and the balancer are coupled to opposite end of the flywheel via a pair of elastic media. The striker is configured to generate an impact pressure on the nail bit upon deviating from an original point. The balancer is configured to balance the deviation maintain the flywheel at equilibrium based on force due to tension and compression of the elastic medium.

Description

A DEMOLITION HAMMER

This International Application claims priority from a Patent application filed in India having Patent Application No. 202021044509, filed on October 13, 2020, and titled “A DEMOLITION HAMMER”.

FIELD OF INVENTION

Embodiments of a present invention relate to a power, and more particularly to, an auto demolition hammer with reciprocation impact rotation for striking a fastener.

BACKGROUND

An auto hammer is a commonly used hand-held tool, which has various types. According to the power source, the auto hammer can be divided into two types: pneumatic and electric. The pneumatic auto hammer must be equipped with an air compressor as a power supply, thus the use of the pneumatic auto hammer is limited in some occasions. The electric auto hammer comprises a transmission mechanism for converting the rotating motion of a motor into the linear motion of an impact rod arranged in a nozzle. When a switch on the auto hammer is turned on, the electric power energy is converted into the mechanical energy of the reciprocating motion. However, the arrangement of motor and the striker or beat piece may cause complexity in design.

Hence there is a need for an improved demolition hammer to address the aforementioned issues.

BRIEF DESCRIPTION

In accordance with one embodiment of the disclosure, a demolition hammer is disclosed. The hammer includes a hollow body of a pre-defined shape. The hammer also includes a supporting means partially housed within the hollow body at a first end. The hammer also includes a nail bit operatively coupled to a first end of the supporting means. The hammer also includes a flywheel holder operatively coupled to a second end of the hollow body. The flywheel holder if configured to hold a flywheel. The flywheel holder comprises a striker and a balancer, wherein the striker and the balancer are coupled to opposite end of the flywheel via a pair of elastic media. The striker is configured to generate an impact pressure on the nail bit upon deviating from an original point. The balancer is configured to balance the deviation generated by the striker to maintain the flywheel at equilibrium based on force due to tension and compression of the elastic medium.

To further clarify the advantages and features of the present disclosure, a more particular description of the disclosure will follow by reference to specific embodiments thereof, which are illustrated in the appended figures. It is to be appreciated that these figures depict only typical embodiments of the disclosure and are therefore not to be considered limiting in scope. The disclosure will be described and explained with additional specificity and detail with the appended figures.

BRIEF DESCRIPTION OF THE DRAWINGS

The disclosure will be described and explained with additional specificity and detail with the accompanying figures in which:

FIG. 1 is a schematic representation of a demolition hammer in accordance with an embodiment of the present disclosure;

FIG. 2a is a schematic representation of an internal structure of the demolition hammer of FIG. 1 in accordance with an embodiment of the present disclosure;

FIG. 2b is a schematic representation of a top view of the internal structure of the demolition hammer of FIG. 2 in accordance with an embodiment of the present disclosure;

FIG. 3a is a schematic representation of a flywheel of the demolition hammer of FIG. 1 being open during operation in accordance with an embodiment of the present disclosure;

FIG. 3b is a schematic representation of the flywheel of the demolition hammer of FIG. 1 being closed when not in use in accordance with an embodiment of the present disclosure; FIG. 4a is a schematic representation of the flywheel comprising a heavy plate of a first pre-defined dimensions of FIG. 1 being open during operation in accordance with an embodiment of the present disclosure;

FIG. 4b is a schematic representation of the flywheel comprising the heavy plate of a second pre-defined dimensions of FIG. 1 being open during operation in accordance with an embodiment of the present disclosure’

FIG. 5a is a schematic representation of a side view of the flywheel comprising a heavy plate of the first pre-defined dimensions of FIG. 4a being open during operation in accordance with an embodiment of the present disclosure;

FIG. 5b is a schematic representation of a side view of the flywheel comprising a heavy plate of the second pre-defined dimensions of FIG. 4b being open during operation in accordance with an embodiment of the present disclosure;

FIG. 6a is a schematic representation of the flywheel to be operated in an anti-clockwise direction of FIG. 1 in accordance with an embodiment of the present disclosure;

FIG. 6b is a schematic representation of a striker generating impact pressure on a nail bit of FIG. 1 in accordance with an embodiment of the present disclosure;

FIG. 6c is a schematic representation of an embodiment of an elastic medium balancing the striker and a balancer of FIG. 1 in accordance with an embodiment of the present disclosure;

FIG. 6d is a schematic representation of another embodiment of the elastic medium balancing the striker and the balancer of FIG. 1 in accordance with an embodiment of the present disclosure; and

FIG. 6e is a schematic representation of the flywheel is a normal position of the flywheel of FIG. 1 in accordance with an embodiment of the present disclosure.

Further, those skilled in the art will appreciate that elements in the figures are illustrated for simplicity and may not have necessarily been drawn to scale. Furthermore, in terms of the construction of the device, one or more components of the device may have been represented in the figures by conventional symbols, and the figures may show only those specific details that are pertinent to understanding the embodiments of the present disclosure so as not to obscure the figures with details that will be readily apparent to those skilled in the art having the benefit of the description herein.

DETAILED DESCRIPTION

For the purpose of promoting an understanding of the principles of the disclosure, reference will now be made to the embodiment illustrated in the figures and specific language will be used to describe them. It will nevertheless be understood that no limitation of the scope of the disclosure is thereby intended. Such alterations and further modifications in the illustrated system, and such further applications of the principles of the disclosure as would normally occur to those skilled in the art are to be construed as being within the scope of the present disclosure.

The terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process or method that comprises a list of steps does not include only those steps but may include other steps not expressly listed or inherent to such a process or method. Similarly, one or more devices or sub-systems or elements or structures or components preceded by "comprises... a" does not, without more constraints, preclude the existence of other devices, sub-systems, elements, structures, components, additional devices, additional sub-systems, additional elements, additional structures or additional components. Appearances of the phrase "in an embodiment", "in another embodiment" and similar language throughout this specification may, but not necessarily do, all refer to the same embodiment.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this disclosure belongs. The system, process, and examples provided herein are only illustrative and not intended to be limiting. In the following specification and the claims, reference will be made to a number of terms, which shall be defined to have the following meanings. The singular forms “a”, “an”, and “the” include plural references unless the context clearly dictates otherwise.

Embodiments of the present disclosure relate to a demolition hammer. As used herein, “demolition hammer” also referred as jackhammer is defined as a pneumatic or electromechanical tool that combines a hammer directly with a chisel.

FIG. 1 is a schematic representation of a demolition hammer (10) in accordance with an embodiment of the present disclosure. The demolition hammer (10) includes a hollow body (20) of a pre-defined shape. In one embodiment, the hollow body (20) may be rectangular in share. More specifically, the pre-defined shape of the demolition hammer (10) may be rectangular. In another embodiment, the pre-defined shape of the demolition hammer (10) may be square. Further the demolition hammer (10) also includes a supporting means (30) partially housed within the hollow body (20) at a first end. In one embodiment, the supporting means (30) may be an impact transferring rod support case. In one exemplary embodiment, the supporting means (30) may be coupled to a bottom section of the hollow body (20).

Further, the demolition hammer (10) also includes a nail bit (40) operatively coupled to a first end of the supporting means (30). In one exemplary embodiment, the nail bit (40) may be coupled to a bottom section of the supporting means (30) in order to hold the nail bit (40) firmly. The demolition hammer (10) also includes a flywheel holder (40) operatively coupled to a second end of the hollow body (20). In one embodiment, the second end of the hollow body (20) may be on a side of the hollow body (20). In one specific embodiment, the flywheel holder (40) may be housed within the hollow body (20) when not in use. In another specific embodiment, the flywheel holder (40) may be brought outwards when the demolition hammer (10) needs to be used. In such embodiments, the operations of the flywheel holder (40) may be carried out using one or more operating means. In such embodiment, the one or more operating means may include hinges, and the like. Further, the flywheel holder (40) is configured to hold a flywheel (50) wherein the flywheel (50) is coupled to the flywheel holder (40) along a direction of the nail bit (40). As used herein, the term “flywheel” is defined as a mechanical device specifically designed to efficiently store rotational energy (kinetic energy), which is proportional to the square of its rotational speed and its mass.

Tire flywheel (50) includes a striker (60) and a balancer (70). The striker (60) and the balancer (70) are coupled to opposite end of the flywheel (50) via a pair of elastic media (80). As used herein, the term “striker” is defined as a tool which is used to apply pressure on the nail bit to enable the functioning of the nail bit. Also, the term “balancer” is defined as a tool which is required to balance equilibrium of the flywheel holder (40). In one exemplary embodiment, the elastic medium (80) may include one of a spring, an elastic connecting wires, a spring, or the like.

Further, the striker (60) is configured to generate impact pressure on the nail bit (40) upon deviating from an original point. In one embodiment, the striker (60) generates the impact on the nail bit (40) in a pre-defined direction. In one such embodiment, the pre-defined direction may be a clockwise direction or an anti-clockwise direction. Also, in one exemplary embodiment, a top of the nail bit (40) comprises a rod head configured to receive the impact pressure from the striker (60). More specifically, the strikers (60) are coupled (diametrically opposite) to a clamp in such a way that when the striker (60) hits the impact rod or the nail bit (40), the striker (60) deviates from the original position to pass over the impact rod. Wherein the clamp is coupled to the center point of the flywheel (50). In one exemplary embodiment, the head of the striker (60) may include a hammer. In such embodiment, the hammer may include a tool holder and a tool bit coupled on the tool holder. The tool holder may be configured to provide to and fro motion to the nail bit.

Further, the balancer (70) is configured to balance the deviation generated by the striker (60) to maintain the flywheel (50) at equilibrium based on force due to tension and compression of the elastic medium (80).

In one exemplary embodiment, the demolition hammer (10) may be powered by a power source (90). In one exemplary embodiment, the power source (90) may include one of a motor, an engine, or the like to experience movement in the pre-defined motion. In such embodiment, the pre-defined motion may be in the pre-defined direction such as the clockwise direction or the anti-clockwise direction.

In one preferred embodiment, the striker (60) and the balancer (70) may be connected to the flywheel (50) via a corresponding plurality of holder bars. Also, in one exemplary embodiment, one or more dimensions of the flywheel (50) can be altered to maintained momentum between the striker (60) and the balancer (70).

Furthermore, in one exemplary embodiment, the demolition hammer (10) may further include one or more hinges (100) (as shown in FIGs. 2 and 3) which may be configured to support the flywheel (50) from both the sides.

In operation, the power source (90) transmitted power to the striker (60), due to which the striker (60) rotates in the clockwise direction or the anti-clock wise direction to impart predefined amount of energy to the nail bit (40), due to which the nail bit (40) exerts pressure on the required area. Further, to bring the striker (60) back to the normal position, the balancer (70) balances the position of the striker (60) via the elastic medium (80). Due to the contraction and rarefaction of the elastic medium (80), the striker (60) and the balancer (70) strives to achieve the equilibrium position again. The whole process is repeated for required number of times.

Various embodiments of the present disclosure enable the demolition hammer to eliminate bulky and expensive components thereby making the entire apparatus less complex, less bulky and thereby less expensive.

While specific language has been used to describe the disclosure, any limitations arising on account of the same are not intended. As would be apparent to a person skilled in the art, various working modifications may be made to the method in order to implement the inventive concept as taught herein.

The figures and the foregoing description give examples of embodiments. Those skilled in the art will appreciate that one or more of the described elements may well be combined into a single functional element. Alternatively, certain elements may be split into multiple functional elements. Elements from one embodiment may be added to another embodiment. For example, order of processes described herein may be changed and are not limited to the manner described herein. Moreover, the actions of any flow diagram need not be implemented in the order shown; nor do all of the acts need to be necessarily performed. Also, those acts that are not dependent on other acts may be performed in parallel with the other acts. The scope of embodiments is by no means limited by these specific examples.

Claims

9

UWE CLAIM:

1. A demolition hammer (10) comprising: a hollow body (20) of a pre-defined shape; a supporting means (30) partially housed within the hollow body (20) at a first end; a nail bit (40) operatively coupled to a first end of the supporting means (30); a flywheel holder (45) operatively coupled to a second end of the hollow body (20), wherein the flywheel holder (40) if configured to hold a flywheel (50), wherein the flywheel (50) is coupled to the flywheel holder (40) along a direction of the nail bit (40), characterized in that, wherein the flywheel holder (40) comprises a striker (60) and a balancer (70), wherein the striker (60) and the balancer (70) are coupled to opposite end of the flywheel (50) via a pair of elastic media (80), wherein the striker (60) is configured to generate impact pressure on the nail bit (40) upon deviating from an original point, wherein the balancer (70) is configured to balance the deviation generated by the striker (60) to maintain the flywheel (50) at equilibrium based on force due to tension and compression of the elastic medium (80).

2. The demolition hammer (10) as claimed in claim 1, wherein the pre-defined shape of the hollow body (20) comprises one of a square shape or a rectangular shape.

3. The demolition hammer (10) as claimed in claim 1, wherein the striker (60) generates the impact on the nail bit (40) in a pre-defined direction.

4. The demolition hammer (10) as claimed in claim 3, wherein the flywheel (40) is powered by a power source, wherein the power source comprises a motor, or an engine to experience movement in the pre-defined motion. 5. The demolition hammer (10) as claimed in claim 1, wherein a top of the nail bit (40) comprises a rod head configured to receive the impact pressure from the striker (60).

6. The demolition hammer (10) as claimed in claim 1, wherein one or more dimensions of the flywheel (50) can be altered to maintain momentum between the striker (60) and the balancer (70).

7. The demolition hammer (10) as claimed in claim 1, wherein the striker (60) and the balancer (70) are connected to the flywheel (50) via a corresponding plurality of holder bars. 8. The demolition hammer (10) as claimed in claim 1, wherein flywheel holder

(40) can be housed within the hollow body (20) via one or more hinges when the demolition hammer (10) is not in use.