Non-rebound hammer head

Abstract

The present invention relates to a hammer head having an inner cavity containing a weight sized to limit escape of the weight from cracks in the hammer or to easily collect and resolve the weight if the hammer is separated to ensure that foreign objects and debris do not contaminate the sensitive workspace. The weight is shaped to allow the weight to move longitudinally in the interior cavity. The heavy object can be in various different shapes.

Description

No rebound hammer

[0001] This application is a divisional application of the invention patent application filed on July 12, 2021, with application number 202110786182.X and invention title "non-rebounding hammer". Technical Field

[0002] This invention generally relates to hammers. More specifically, this invention relates to a dead blow hammer head having internal damping material. Background Technology

[0003] A hammerhead is a well-known tool used to strike a workpiece. The hammerhead is attached to the end of a handle and swung towards the workpiece to apply an impact. The hammerhead may include a striking surface that strikes the workpiece and, upon impact, propels the workpiece into the work surface. The force felt by the user upon impact is commonly referred to as "rebound," and skilled craftsmen have worked to suppress rebound.

[0004] Non-rebound hammers typically include an inner cavity partially filled with a "shot" or other flowable material to suppress the hammer's rebound force. For example, the flowable material acts on the hammer after impact with the workpiece to exert a force opposite to the rebound motion and "reduce" the hammer's rebound. However, these hammers cannot be used in sensitive environments because the flowable material can escape if the inner cavity ruptures. Summary of the Invention

[0005] This invention broadly relates to a hammerhead having an inner cavity comprising a weight sized to restrict its escape from cracks in the hammer, or to facilitate easy collection and disposal should the hammer separate, ensuring that foreign objects and debris do not contaminate sensitive workspaces. In one example, the weight is a weighted disc that slides longitudinally along a guide rod within the cavity. In this example, the weight may be shaped as a flat disc or other form to tightly fill the cross-section of the cavity. Discrete weights may have at least one hole for axially guiding the guide rod, which restricts the weight's assembly within the cavity. The combined height of all weights is also less than the total length of the cavity, thus allowing the weight to slide along the axis of the guide rod to provide a bounce-free effect.

[0006] In another example, the weights are longitudinally aligned spherical blocks. In this example, the diameter of the spherical weights is smaller than the minimum dimension of the inner cavity's cross-section. The total height of all the spherical weights is also smaller than the length of the inner cavity.

[0007] In one embodiment, the present invention relates to a hammerhead comprising a body having a first end and a second end, an end cap coupled to the second end, and an inner cavity formed in the body and having a longitudinal axis. A guide rod is disposed in the inner cavity and extends longitudinally along the longitudinal axis. A weight including a through hole is disposed in the inner cavity, and the guide rod extends through the through hole.

[0008] In another embodiment, the present invention relates to a hammerhead comprising a body having a first end and a second end, an end cap coupled to the second end, and an inner cavity formed in the body and having a longitudinal axis. Weights are disposed in the inner cavity and stacked linearly along the longitudinal axis.

[0009] In yet another embodiment, the present invention relates to a hammerhead comprising a body having a first end and a second end, an end cap coupled to the second end, and an inner cavity formed in the body and having a longitudinal axis. Weights are longitudinally disposed in the inner cavity, and each of the weights includes a deformable end. Attached Figure Description

[0010] To facilitate understanding of the subject matter for which protection is sought, embodiments thereof are shown in the accompanying drawings. When considered in conjunction with the following description, an examination of the embodiments thereof should readily reveal and make known the subject matter for which protection is sought, its construction and operation, and its many advantages.

[0011] Figure 1 is a plan view showing the exterior of an exemplary hammerhead according to an embodiment of the present invention.

[0012] Figure 2 is a cross-sectional view of the hammer taken along line AA of Figure 1, and includes a disc-shaped weight according to an embodiment of the present invention.

[0013] Figure 3 is a cross-sectional view of the hammer head perpendicular to the longitudinal axis of the hammer head in Figure 2 according to an embodiment of the present invention.

[0014] Figure 4 is a perspective view of an exemplary weight of the hammerhead of Figure 2 according to an embodiment of the present invention.

[0015] Figure 5 is a cross-sectional view of the hammer taken along line AA of Figure 1, and includes a spherical weight according to another embodiment of the present invention.

[0016] Figure 6 is a cross-sectional view of the hammer head perpendicular to the longitudinal axis of the hammer head in Figure 5 according to an embodiment of the present invention.

[0017] Figure 7 is a cross-sectional view of the hammer taken along line AA of Figure 1, and includes a longitudinal rod-shaped weight according to another embodiment of the present invention.

[0018] Figure 8 is a cross-sectional view of the hammer head perpendicular to the longitudinal axis of the hammer head in Figure 7 according to an embodiment of the present invention.

[0019] Figure 9 is a perspective view of the weight of the hammer head in Figure 7 according to an embodiment of the present invention. Detailed Implementation

[0020] While the invention is permissible in many different forms, preferred embodiments are shown in the accompanying drawings, and they will be described in detail herein. However, it should be understood that this disclosure should be considered as an example of the principles of the invention and is not intended to limit the broad aspects of the invention to the embodiments shown. As used herein, the term "invention" is not intended to limit the scope of the claimed invention, but is used for illustrative purposes only to discuss exemplary embodiments of the invention.

[0021] This invention broadly includes a hammerhead with an inner cavity comprising a weight sized to restrict escape from cracks in the hammer, or to facilitate collection and disposal should the hammer break apart, ensuring that foreign objects and debris do not contaminate sensitive workspaces. The weight is shaped to allow longitudinal movement within the cavity to provide a bounce-free effect. The weight can take many different forms. For example, in one example, the weight can be shaped as a long, thin rod. The length of the rod is less than the length of the cavity, and the geometry of the rod is chosen to maximize filling efficiency based on the size and shape of the cavity. Furthermore, the rod may be tapered or rounded at the ends to allow for deformation of the ends after striking the end of the cavity.

[0022] In another example, the weight is a counterweight plate that slides longitudinally along the guide rod within the cavity to provide a bounce-free effect. In this example, the weight may be shaped as a flat plate or other form to tightly fill the cross-section of the cavity. Discrete weights may have at least one hole for the axial guide rod, which restricts the assembly of the weights within the cavity. The combined height or length of all weights is also less than the length of the cavity.

[0023] In another example, the weights are longitudinally aligned spherical weights. In this example, the diameter of the spherical weights is smaller than the minimum dimension of the cavity's cross-section to allow the weights to move longitudinally within the cavity, thus providing a bounce-free effect. The total length of all the spherical weights combined is also smaller than the length of the cavity to provide space for the longitudinal movement of the weights.

[0024] Referring to FIG1, an embodiment of the present invention includes a hammer head 100. It will be appreciated that the embodiment of the hammer head 100 shown in FIG1 can be used with embodiments of different weights discussed herein, which is why, for example for the purpose of cross-section, the accompanying drawings of different embodiments of the weights are described with reference to FIG1. ​​The hammer head 100 includes a body 102 and an end cap 104 coupled to the body 102. The body 102 may include a first end 106 having a tapered shape for striking a workpiece and driving the workpiece into a working surface. For example, the first end 106 may be used when the workpiece is located within a groove, or when a ball-point hammer or similar tool is used.

[0025] End cap 104 is attached to a second end 108 of the body opposite the first end 106. End cap 104 may include a generally flat striking surface 110 for striking a workpiece and driving it into a working surface. End cap 104 can be attached to the body 102 in various ways. For example, end cap 104 can be attached to the body 102 via threaded connection, friction / interference fit, welding, adhesive, etc. In some embodiments, it may be desirable to make end cap 104 releasably attached to the second end, such that it is removable and reattached to the body 102, to allow, for example, user interchange of weights (e.g., the user can select weights of different masses to incorporate into the hammerhead to achieve the desired bounce-free effect). In these cases, threaded connection or friction / interference fit may be suitable.

[0026] The hammer head 100 can also be attached to the handle in a known manner. For example, the hammer body may include one or more protrusions or ribs 112 that facilitate attachment of the hammer head 100 to the handle.

[0027] The hammerhead 100 may also include an inner cavity adapted to receive discrete weights that, when the hammerhead 100 is used to strike a workpiece, suppress or absorb the rebound force of the hammerhead 100, a phenomenon known as a rebound-free effect. In one embodiment, as shown in Figures 2 to 4, the hammerhead 100 includes an inner cavity 114 formed by a first axial hole 116 and a second axial hole 118. The first axial hole 116 extends from a second end 108 of the body 102 in a direction toward a first end 106, and the second axial hole 118 extends into the end cap 104 and in a direction toward the striking surface 110. The length of the inner cavity extends substantially along the longitudinal axis 120 of the hammerhead 100 (shown in Figure 1), and its cross-sectional dimensions (which may be width or diameter) extend substantially perpendicular to the longitudinal axis 120.

[0028] In this embodiment, one or more discrete weights 202 are disposed within the cavity 114 and adapted to slide longitudinally along a guide rod 204 disposed within the cavity 114 to provide a bounce-free effect. Each of the weights 202 may be shaped as a flat disc or other shape corresponding to the cross-sectional shape of the cavity 114 to tightly fill the cross-section of the cavity 114. Each of the weights 202 may also include at least one through-hole 206 through which the guide rod 204 extends.

[0029] The guide rod 204 may have a length substantially corresponding to the length of the inner cavity 114 to limit the axial movement of the guide rod 204 with respect to the hammer head 100. The guide rod 204 also guides the axial movement of the weights 202 within the inner cavity 114 and limits the engagement of the weights 202 within the inner cavity 114. Multiple weights 202 may be arranged within the inner cavity 114, and the combined height or length of all weights 202 may be less than the length of the inner cavity 114, forming a gap 208 between the combined height or length of all weights 202 and the end of the inner cavity 114. This gap 208 allows the weights 202 to move longitudinally along the guide rod 204 within the inner cavity 114 to provide a non-rebounding effect when the workpiece is struck with the hammer head 100.

[0030] Although the cross-sectional shape of the cavity 114 and the weight 202 is shown as circular, the cross-sectional shape can be square, rectangular, triangular, or any other shape. The dimensions of the weight 202 are also configured to restrict the escape of the weight 202 from the crack in the hammer head 100, or to facilitate the collection and disposal of the weight 202 if the hammer head 100 is separated, ensuring that foreign objects and debris do not contaminate the sensitive workspace. For example, as shown in Figure 2, eight weights 202 are arranged linearly relative to each other. However, it should be appreciated that more or fewer than eight weights 202 may be used depending on the dimensions of the cavity 114. Furthermore, it will be appreciated that if the end cap is removed from the hammer head 100, the user can adjust the number and / or mass of the weights in the cavity 114 to achieve the desired bounce-free effect.

[0031] In another embodiment, referring to Figures 5 and 6, one or more discrete weights 302 are disposed within the cavity 114 and adapted to move longitudinally within the cavity 114. Each of the weights 302 may be shaped as a sphere or other shape corresponding to the cross-sectional shape of the cavity 114 to tightly fill the cross-section of the cavity 114. Multiple weights 302 may be disposed within the cavity 114, and the combined height or length of all weights 302 is less than the length of the cavity 114 to form a gap 308 between the combined height or length of all weights 302 and the end of the cavity 114. This gap 308 allows the weights 302 to move longitudinally within the cavity 114 to provide a non-rebounding effect when the workpiece is struck with the hammer head 100.

[0032] Although the cross-sectional shape of the cavity 114 and the weight 302 is shown as circular, the cross-sectional shape can be square, rectangular, triangular, or any other shape. The dimensions of the weight 302 are also configured to restrict the escape of the weight 302 from the crack in the hammer head 100, or to facilitate collection and disposal if the hammer head 100 is separated, ensuring that foreign objects and debris do not contaminate the sensitive workspace. For example, as shown in Figure 5, five weights 302 are arranged linearly relative to each other. However, it should be appreciated that more or fewer than five weights 302 may be used depending on the dimensions of the cavity 114. Furthermore, it will be appreciated that if the end caps are removable from the hammer head 100, the user can adjust the number and / or mass of the weights in the cavity 114 to achieve the desired bounce-free effect.

[0033] In another embodiment, referring to Figures 7 through 9, one or more discrete weights 402 are disposed within the cavity 114 and adapted to move longitudinally within the cavity 114. Each of the weights 402 may be shaped as a long, thin rod. The length of each of the weights 402 is less than the length of the cavity 114, so as to form a gap 408 between the end of the weight 402 and the end of the cavity 114. This gap 408 allows the weight 402 to move longitudinally within the cavity 114 to provide a non-rebound effect when the workpiece is struck with the hammer head 100.

[0034] The cross-sectional geometry of each weight 402 can also be selected based on the size and shape of the cavity 114 to maximize filling efficiency and tightly fill the cross-section of the cavity 114. For example, the cross-sectional shape of each of the weights 402 can be circular, and the dimensions are set to allow six weights 402 to be placed in the cavity 114 in a circular arrangement, with an additional weight 402 (seven in total) positioned at the center between the six weights 402.

[0035] Furthermore, each of the weights 402 may also have an opposing first end 410 and a second end 412. The first end 410 and the second end 412 may be tapered or rounded to allow deformation of the first end 410 and the second end 412 after striking the end of the inner cavity 114. In this embodiment, it may be desirable to make the end cap 104 removable from the body 102 (as described above) to allow replacement of the weights 402.

[0036] Although the cross-sectional shape of the cavity 114 and the weight 402 is shown as circular, the cross-sectional shape can be square, rectangular, triangular, or any other shape. The dimensions of the weight 402 are also configured to restrict the escape of the weight 402 from the crack in the hammer head 100, or to facilitate collection and disposal if the hammer head 100 is separated, ensuring that foreign objects and debris do not contaminate the sensitive workspace. For example, as shown in Figure 7, seven weights 402 are arranged longitudinally in the cavity 114 and are adjacent to each other. However, it should be appreciated that more or fewer than seven weights 402 may be used depending on the dimensions of the cavity 114. Furthermore, it will be appreciated that if the end caps are removable from the hammer head 100, the user can adjust the number and / or mass of the weights in the cavity 114 to achieve the desired bounce-free effect.

[0037] As used herein, the term "connected" and its functional equivalents are not intended to necessarily limit themselves to a direct, mechanical connection of two or more components. Rather, the term "connected" and its functional equivalents are intended to represent any direct or indirect mechanical, electrical, or chemical connection between two or more objects, features, workpieces, and / or environmental substances. In some examples, "connected" also means that one object is integral with another. As used herein, the term "a" or "an" may include one or more items unless otherwise specified.

[0038] The content set forth in the foregoing description and accompanying drawings is provided for illustrative purposes only and is not intended to be limiting. Although specific embodiments have been shown and described, it will be apparent to those skilled in the art that changes and modifications can be made without departing from the broader aspects of the inventors' contributions. The actual scope of protection sought is intended to be defined by the appended claims when viewed from the appropriate perspective of the prior art.

Claims

1. A hammerhead having a longitudinal axis, the hammerhead comprising: A body adapted to be coupled to a handle, the body having opposing first and second ends and a first axial hole extending from the second end toward the first end into the body, wherein the first end is adapted to impact a workpiece; an end cap coupled to the second end and including a second axial hole extending into the end cap, wherein the end cap includes a striking surface opposite the first end; a continuous cavity formed by the cooperation of the first and second axial holes, wherein the cavity has a cavity length extending along the longitudinal axis, the cavity length being greater than the length of the first axial hole; a guide rod disposed in the cavity and extending along the longitudinal axis, wherein the guide rod length substantially corresponds to the cavity length to restrict axial movement of the guide rod in the cavity; and a weight including a through hole, wherein the weight is disposed in the cavity and the guide rod extends through the through hole, wherein the weight is longitudinally movable along the guide rod in each of the first and second axial holes.

2. The hammerhead according to claim 1, wherein, The shape of the weight substantially corresponds to the cross-sectional shape of the inner cavity.

3. The hammerhead according to claim 1, wherein, The weight includes one or more weights, and the combined length of the one or more weights is less than the length of the cavity.

4. The hammerhead according to claim 1, wherein, The weights include one or more weights, and the one or more weights are arranged linearly along the longitudinal axis.

5. The hammerhead according to claim 1, wherein, The weight is basically disc-shaped.

6. The hammerhead according to claim 1, wherein, The end cap is releasably connected to the second end.

7. The hammerhead according to claim 1, wherein, The first end has a tapered shape, and the striking surface of the end cap is substantially flat.

8. The hammerhead according to claim 1, wherein, The body and the end cap each include a protrusion adapted to facilitate attachment of the hammerhead to the handle.

9. A hammerhead having a longitudinal axis, the hammerhead comprising: A body adapted to be coupled to a handle, the body having opposing first and second ends and a first axial hole extending from the second end into the body in a direction toward the first end, wherein the first end is adapted to impact a workpiece; an end cap coupled to the second end and including a second axial hole extending into the end cap, wherein the end cap includes a striking surface opposite to the first end; The inner cavity is formed by the cooperation of the first axial hole and the second axial hole, and has a cavity cross-sectional dimension and a cavity length extending along the longitudinal axis, the cavity length being greater than the length of the first axial hole; And a series of weights disposed in the inner cavity and arranged linearly along the longitudinal axis, wherein each of the weights has a cross-sectional dimension substantially corresponding to the cross-sectional dimension of the cavity, and at least one of the weights is longitudinally movable along the longitudinal axis in the second axial hole.

10. The hammerhead according to claim 9, wherein, Each of the weights has a spherical shape.

11. The hammerhead according to claim 9, wherein, The combined length of the weights is less than the length of the cavity.

12. The hammerhead according to claim 9, wherein, The end cap is releasably connected to the second end.

13. The hammerhead according to claim 9, wherein, The first end has a tapered shape, and the striking surface of the end cap is substantially flat.

14. The hammerhead according to claim 9, wherein, The body and the end cap each include a protrusion adapted to facilitate attachment of the hammerhead to the handle.

15. A hammerhead, comprising: A body adapted to be attached to a handle, the body having opposing first and second ends, wherein the first end is adapted to impact a workpiece; an end cap attached to the second end; An inner cavity formed in the body and having a longitudinal axis extending between the first end and the second end; and weights disposed in the inner cavity and movable therein, wherein each of the weights includes an opposing first end and a deformable second end and has a longitudinal axis extending in a direction substantially the same as the longitudinal axis of the cavity.

16. The hammerhead according to claim 15, wherein, Each of the weights has a rod shape.

17. The hammerhead according to claim 15, wherein, Each of the weights has a weight length that is less than the length of the cavity.

18. The hammerhead according to claim 15, wherein, The weights are arranged adjacent to each other in the inner cavity.

19. The hammerhead according to claim 15, wherein, The first end and the deformable second end are tapered.

20. The hammerhead according to claim 15, wherein, The end cap is releasably connected to the second end.

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