Hammer

Abstract

A hammer is shown that includes a handle that is configured to be replaceable. In one embodiment, the handle includes a grip insert coupled to a shaft of the hammer and an outer grip surrounding the grip insert. In another embodiment, a hammer includes a shaft having a pair of opposing channels. The handle includes a grip insert having a pair of corresponding projections coupled to the pair of opposing channels, and an outer grip surrounding the grip insert.

Description

[0001] Cross-references to related patent applications

[0002] This application claims the benefit of and priority to U.S. Provisional Application No. 63 / 309,144, filed on February 11, 2022, which is incorporated herein by reference in its entirety. Background Art

[0003] The utility model generally relates to the field of tools, and specifically relates to a handheld tool (hammer, screwdriver, pry bar, axe, file, wood lathe tool, knife, machete, etc.) with a grip or handle, wherein the grip or handle is configured to be replaceable and to improve the service life of the handheld tool. Utility Model Content

[0004] One embodiment of the utility model relates to a hammer, which includes a head, a shaft and a replaceable handle. The head includes a striking portion. The shaft is rigidly coupled to the head and extends along the longitudinal axis of the hammer. The replaceable handle is removably coupled to the shaft and includes a grip insert and a grip. The grip insert is coupled to the shaft. The grip is coupled to the grip insert and at least partially surrounds the grip insert. The radially outwardly facing surface of the shaft engages the grip insert to resist rotation of the replaceable handle relative to the shaft during use of the hammer. The grip insert is formed of a first polymer material, the grip is formed of a second polymer material, and wherein the first polymer material is different from the second polymer material.

[0005] Another embodiment of the utility model relates to a hammer, which includes a head, a shaft and a replaceable handle. The shaft is rigidly coupled to the head and extends along the longitudinal axis of the hammer. The replaceable handle is coupled to the shaft and includes a grip insert and a grip. The grip insert is coupled to the shaft and includes a first end and a second end. The first end is positioned between the head and the second end. The grip is coupled to the grip insert and surrounds the second end of the grip insert. The grip provides a compressive force to the grip insert so that the replaceable handle is securely engaged with the shaft.

[0006] Another embodiment of the utility model relates to a hammer, which includes a head, a shaft and a replaceable handle. The shaft is coupled to the head and extends along the longitudinal axis of the hammer. The replaceable handle is coupled to the shaft and includes a grip insert, a grip and a fastener. The grip insert is coupled to the shaft and includes a first end and a second end. The first end is positioned between the head and the second end. The grip is coupled to the grip insert. The fastener extends through the second end of the grip insert along the longitudinal axis of the hammer to securely couple the replaceable handle to the shaft.

[0007] Another embodiment of the utility model is directed to a hand-held tool, which includes a head, a shaft rigidly connected to the head, and a replaceable handle. The replaceable handle includes: a grip insert, which is connected to the shaft; and a grip, which is connected to the grip insert and at least partially surrounds the grip insert. The grip defines at least a majority of the outermost or external surface of the replaceable handle. In a specific embodiment, the grip surrounds the grip insert as a whole so that the grip defines the entire outermost or external surface of the replaceable handle. In a specific embodiment, the shaft has a polygonal shape (e.g., a generally octagonal shape) so that the shaft resists rotation of the grip and the grip insert relative to the shaft of the hand-held tool during use.

[0008] Another embodiment of the utility model relates to a hand-held tool, which includes a head, a shaft rigidly connected to the head, and a replaceable handle. The replaceable handle includes: a grip insert, which is connected to the shaft; and a grip, which is connected to the grip insert and / or the shaft. The shaft includes a longitudinal channel extending along the longitudinal axis of the hand-held tool. The grip insert includes a protrusion, which is configured to engage with the longitudinal channel so that the grip insert resists rotation of the grip and the grip insert relative to the shaft of the hand-held tool during use. In a specific embodiment, the shaft includes a pair of longitudinal channels and the grip insert includes a pair of protrusions.

[0009] In a specific embodiment, a fastener positioned along the longitudinal axis of the hand tool couples the grip insert to the shaft of the hand tool at the gripping end. The grip completely wraps around and / or surrounds the fastener and the gripping end of the grip insert, so that the replaceable handle is securely attached to the shaft of the hand tool and provides impact resistance during a strong impact to the hand tool.

[0010] The accompanying drawings are included to provide a further understanding and are incorporated in and constitute a part of this specification. The drawings illustrate one or more embodiments and together with the description serve to explain principles and operations of the various embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The present application will be more fully understood from the following detailed description taken in conjunction with the accompanying drawings, in which like reference numerals refer to like elements, and in which:

[0012] Figure 1 is a top perspective view of a hammer with the handle removed according to an exemplary embodiment.

[0013] Figure 2 According to an exemplary embodiment Figure 1 A top perspective view of a hammer.

[0014] Figure 3 According to an exemplary embodiment Figure 1 Detailed perspective view of the top portion of the hammer's shaft.

[0015] Figure 4 According to an exemplary embodiment Figure 1 Detailed perspective view of the bottom portion of the hammer's shaft.

[0016] Figure 5 According to an exemplary embodiment Figure 1 A detailed perspective view of the end portion of the hammer's shaft.

[0017] Figure 6 According to an exemplary embodiment Figure 1 A side perspective view of a hammer having a grip insert.

[0018] Figure 7 According to an exemplary embodiment Figure 6 A side perspective view of a grip insert.

[0019] Figure 8 According to an exemplary embodiment Figure 7 Rear perspective view of the grip insert.

[0020] Fig. 9 According to an exemplary embodiment Figure 7 Front perspective view of a grip insert.

[0021] Fig.10 is a side perspective view of a grip insert according to an exemplary embodiment.

[0022] Fig.11 According to an exemplary embodiment Fig.10 Rear perspective view of the grip insert.

[0023] Fig.12 According to an exemplary embodiment Fig.10 Front perspective view of a grip insert.

[0024] Fig.13 According to an exemplary embodiment Fig.10 A top perspective view of a grip insert with the top portion removed.

[0025] Fig.14 is a top perspective view of a hammer according to another exemplary embodiment.

[0026] Fig.15 According to an exemplary embodiment Fig.14 A bottom perspective view of a hammer.

[0027] Fig.16 According to an exemplary embodiment Fig.14Detailed perspective view of the top portion of the hammer's shaft.

[0028] Fig.17 According to an exemplary embodiment Fig.14 Detailed perspective view of the bottom portion of the hammer's shaft.

[0029] Fig.18 According to an exemplary embodiment Fig.14 A partial exploded view of the end portion of the hammer's shaft.

[0030] Fig.19 According to an exemplary embodiment Fig.14 A side perspective view of a hammer having a grip insert.

[0031] Fig. 20 According to an exemplary embodiment Fig.14 Detailed side perspective view of a hammer having a grip insert.

[0032] Fig.21 According to an exemplary embodiment Fig. 20 A side perspective view of a grip insert.

[0033] Fig. 22 According to an exemplary embodiment Fig.21 Rear perspective view of the grip insert.

[0034] Fig.23 According to an exemplary embodiment Fig.21 Front perspective view of a grip insert.

[0035] Fig.24 According to an exemplary embodiment Fig.21 A cross-sectional view of the grip insert.

[0036] Fig.25 According to an exemplary embodiment Fig.14 A perspective view of a hammer grip and a grip insert.

[0037] Fig.26 According to an exemplary embodiment Fig.14 A perspective view of the grip of a hammer.

[0038] Fig. 27 is a top perspective view of a hammer according to another exemplary embodiment.

[0039] Fig.28 According to an exemplary embodiment Fig. 27 A bottom perspective view of a hammer.

[0040] Fig.29 According to an exemplary embodiment Fig. 27Detailed perspective view of the nail retaining system of a hammer that holds the nail.

[0041] Fig.30 According to an exemplary embodiment Fig. 27 Detailed perspective view of the nail holding system of a hammer without the nail.

[0042] Fig.31 is a perspective view of a hammer head having a nail retaining system on a replaceable hammer face according to an exemplary embodiment.

[0043] Fig.32 is a partially exploded view of a hammer head according to an exemplary embodiment, wherein the hammer head has a replaceable hammer face.

[0044] Fig.33 is a perspective view of a hammer head according to an exemplary embodiment, wherein the hammer head has a hammer face.

[0045] Fig.34 According to an exemplary embodiment Fig.33 Front view of the hammer face.

[0046] Fig.35 According to an exemplary embodiment Fig.33 Rear view of the hammer face. DETAILED DESCRIPTION

[0047] Referring generally to the accompanying drawings, various different embodiments of hand tools, specifically hammers, are shown. The various different embodiments of the hand tools discussed herein include innovative replaceable handles. The replaceable handles are designed to improve the docking or engagement between the grip or handle and the shaft of the hand tool. Compared to the replaceable handles discussed herein, the replaceable handle may not engage adequately with the shaft of the hand tool, such that the efficiency of the tool may be reduced because the grip may twist or rotate relative to the shaft of the tool during use of the hand tool. For example, when a hammer is used to strike a workpiece, such rotation of the grip may reduce the force applied to the workpiece. Similarly, such unwanted grip rotation may reduce the effectiveness of other types of hand tools. For example, when the hand tool is a screwdriver, the grip rotation may reduce the torque applied to the workpiece.

[0048] Various embodiments discussed herein relate to a hammer having a generally polygonal cross-sectional shaft (e.g., an octagonal shaft). Compared to conventional I-shaped hammers, the applicant believes that the polygonal shaft shape provides sufficient torque resistance to prevent the handle from rotating relative to the hammer shaft (i.e., the interchangeable handle is consistent with the frame of the hammer) so that the hammer provides appropriate force to the workpiece when the hammer is in use.

[0049] Further, applicants believe that incorporating a channel or a pair of longitudinal (e.g., along the major axis of the shaft) channels into the shaft of the hammer and in combination with a corresponding protrusion or anti-rotation reinforcement rib on the inner surface of the grip insert additionally reduces and / or prevents undesired rotation of the grip relative to the hammer. When assembled, the protrusion of the grip is received within the channel of the shaft, thereby providing additional resistance to rotation of the grip relative to the shaft of the hammer. In various embodiments discussed herein, a system is provided to prevent improper assembly of a replaceable grip with a hammer. In a specific embodiment, the shaft of the hammer includes a protrusion, and the grip insert and / or the grip includes a channel for receiving the protrusion, such that the grip cannot be installed on the hammer in a backward or inverted orientation.

[0050] In addition, the interchangeable handle designs discussed herein include fasteners (e.g., bolts, nuts, screws, etc.) positioned at the bottom or gripping end of the handle to couple the handle to the shaft and maintain the position of the interchangeable handle. Applicants have discovered that positioning the fasteners along the longitudinal axis of the handle makes the connection between the handle and the shaft of the hammer more robust. In contrast to the interchangeable handles discussed herein, interchangeable handles typically include fasteners that are positioned to pass through the shaft in a direction perpendicular to the longitudinal axis of the shaft. Applicants believe that positioning the fasteners helps to better press the grip into the shaft of the hammer so that the grip is maintained in position when the hammer is used to strike a workpiece.

[0051] Another benefit of positioning the fasteners of the replaceable design handle discussed herein is the ability to tighten and / or retighten the handle to the shaft of the hammer. Fasteners that extend in a direction perpendicular to the longitudinal axis of the shaft may wear and prevent the user from using the hammer due to the loose nature of the connection. In contrast, applicant's design allows the user to tighten the fasteners in the event that the handle wears over time and the connection becomes loose, thereby extending the life of the tool and / or replacement handles.

[0052] Various embodiments discussed herein relate to a hammer having an outer grip surface surrounding a grip insert including a bottom or gripping end of a handle where a fastener is located. The outer grip is formed of a different material than the grip insert, such as a thermoplastic rubber, and is configured to provide secure attachment and retention to the hammer during impact (e.g., forceful contact with a falling object, dropping the hammer, etc.). In contrast to the interchangeable handles discussed herein, interchangeable handles typically have their grip inserts formed of a thermoplastic polymer material exposed at the bottom of the handle, thereby making these handles susceptible to damage from forceful contact. In addition, applicants believe that the outer grip provides a compressive force to the grip insert and / or the shaft of the hammer, thereby improving the docking or engagement between the grip or handle and the shaft of the handheld tool.

[0053] Applicants believe that an extension of the outer grip below the bottom surface of the grip insert will improve impact absorption. Further, positioning the fastener along the longitudinal axis of the hammer and the shaft will improve performance because the impact energy is not perpendicular to the bolt.

[0054] In other embodiments, the hand-held tool with a replaceable handle may be a different tool (e.g., a screwdriver, a pry bar, an axe, a file, a woodworking lathe knife, a knife, a machete, etc.). Applicants have discovered that the engaging portion of the tool (e.g., a tip, a striking surface, etc.) may wear at a reduced rate relative to the handle, such that the life of the tool may be extended if the handle is replaced. Similarly, for hand-held tools such as files, the engaging end that may wear at an increased rate relative to the handle may be replaced, such that the life of the tool may be extended by reusing the handle with a new file.

[0055] refer to Figure 1 to Figure 2 , various aspects of a handheld tool, shown as a hammer 10, are shown. Generally, the hammer 10 includes a neck 14, a shaft or body 12, and a head, shown as a hammer body 16. The hammer body 16 includes a horn 18 on an end of the hammer body 16 opposite a striking portion 19 of the hammer body 16. In various embodiments, the striking portion 19 includes a striking surface, which may be smooth or textured.

[0056] The hammer 10 further includes a striking end 20 and a gripping end 22 opposite the striking end 20, the striking end including a hammer body 16. The neck 14 rigidly couples the hammer body 16 to the shaft 12. The neck 14 and the shaft 12 extend from the hammer body 16 in a generally perpendicular direction along a longitudinal axis 32 of the hammer 10. The longitudinal axis 32 extends along the main axis of the hammer 10 between the striking end 20 and the gripping end 22. The base 30 of the neck 14 is located at an end of the neck 14 distal from the hammer body 16. The base 30 includes a base diameter that is greater than the diameter of the shaft 12.

[0057] like Figure 2 As shown, a handle (shown as an interchangeable handle 24) can be coupled to the hammer 10 and, in particular, to the shaft 12. The interchangeable handle 24 includes a schematically shown grip insert 28 (see, e.g., Figure 6 28) and grip 26. As will be discussed in more detail below, applicants have designed the replaceable handle 24 to be more robustly connected to the shaft 12 to reduce and / or prevent unwanted rotation or twisting of the replaceable handle 24 relative to the shaft 12 of the hammer 10.

[0058] refer to Figure 3 to Figure 4 , showing the top of the shaft 12 (at Figure 11 and 12. In a specific embodiment, the shaft 12 is a polygonal prism such that the cross-sectional shape of the shaft 12 is polygonal. In a specific embodiment, the polygonal prism is an octagonal prism such that the cross-sectional shape of the shaft 12 is an octagon. In a specific embodiment, the shaft 12 is an irregular octagonal prism. In another embodiment, the shaft 12 can be another shape (e.g., a regular octagonal prism, a hexagonal prism, etc.). As previously mentioned, applicant believes that the polygonal (e.g., octagonal) shaft shape provides better torque resistance than a typical I-shaped shaft to prevent the grip 26 from rotating relative to the shaft 12 of the hammer 10 (i.e., the interchangeable handle 24 is aligned with the frame of the hammer 10) so that the hammer provides appropriate force to the workpiece during use. Specifically, in this embodiment, the radially outwardly facing outer surface of the shaft 12 having a polygonal cross-sectional shape engages the grip insert 28 to resist rotation of the grip 26, the grip insert 28, and / or the interchangeable handle 24 relative to the shaft 12 during use of the hammer 10.

[0059] In a particular embodiment, the shaft 12 includes a first passage 34 defined in the top surface 36 of the shaft 12, a second passage 52 defined in the bottom surface 54 (at Figure 1 10). The first channel 34 and the second channel 52 each extend along the longitudinal axis 32 and are positioned between the base 30 and the end surface 44. In other embodiments, the shaft may not include a channel extending along the shaft. In other words, in a particular embodiment, a pair of opposing channels 34, 52 are defined in the shaft 12, wherein the opposing channels 34, 52 extend along the longitudinal axis 32 of the hammer 10. As will be discussed in more detail below, in such an embodiment, when the replaceable handle 24 is coupled to the shaft 12, a pair of protrusions on the grip insert 28 are positioned within and engage the opposing channels 34, 52.

[0060] The first channel 34 and the second channel 52 each extend along a length L1 of the shaft 12. L1 is defined between the base 30 and the end surface 44 of the shaft 12. The length L2 of the first channel 34 is defined between a first end 35 of the shaft 12 adjacent to the base 30 and a second end 37 of the shaft 12 opposite the first end of the shaft 12. In a specific embodiment, the length L3 of the second channel 52 is the same as the length L2 of the first channel 34. In other embodiments, L3 may be different from L2. In a specific embodiment, the first channel 34 and the second channel 52 each extend along a majority of the shaft 12, such that L2 and L3 are at least 50% of L1. In a specific embodiment, L2 and L3 are between 50% and 99% of L1, specifically between 70% and 99% of L1, more specifically between 85% and 90% of L1, and in such an embodiment, L2 and L3 are approximately 6.54 inches (e.g., 6.54 inches ± 0.65 inches).

[0061] The first channel 34 includes a channel surface 38 that is positioned between and connected to opposite sides of the top surface 36. A first channel protrusion 40 is coupled to the channel surface 38 and extends outwardly therefrom (e.g., toward the top surface 36). In a particular embodiment, the first channel protrusion 40 is generally rectangular prism-shaped. In other embodiments, the first channel protrusion may have other shapes (e.g., triangular prisms, hexagonal prisms, polygonal prisms, etc.). The first channel protrusion 40 is configured to be received by a recess of the grip insert that has a shape that generally corresponds to the shape of the first channel protrusion 40 (see, e.g., Fig. 9 108 in ).

[0062] The second channel 52 includes a channel surface 56 that is positioned between and connected to opposite sides of the bottom surface 54. A second channel protrusion 58 is coupled to the channel surface 56 and extends outwardly from the channel surface (e.g., toward the bottom surface 54). In a particular embodiment, the second channel protrusion 58 is generally rectangular prism-shaped. In other embodiments, the second channel protrusion may have other shapes (e.g., triangular prisms, hexagonal prisms, polygonal prisms, etc.). The second channel protrusion 58 is configured to be received by a recess of the grip insert that generally corresponds in shape to the second channel protrusion 58, which is aligned with a recess configured to receive the first channel protrusion 40 (see, e.g., Fig. 9 108) in relative.

[0063] refer to Figure 3, the top surface 36 further includes a fastening recess 42. The fastening recess 42 is configured to receive at least a portion of a fastener (e.g., a bolt, a nut, a screw, etc.). The fastening recess 42 is positioned adjacent to the second end 37 of the shaft 12, between the first passage 34 and the end surface 44. The end surface 44 is substantially perpendicular (e.g., 90°±10°) to the top surface 36 and the bottom surface 54. The end surface 44 includes a hole 46. The hole 46 is connected to the fastening recess 42 and is configured to receive at least a portion of a fastener (e.g., a bolt, a nut, a screw, etc.) so that the shaft 12 can be coupled to the grip insert 28 and / or the replaceable handle 24. In a specific embodiment, the hole 46 is aligned with the longitudinal axis 32.

[0064] The shaft 12 further includes a first upper angled surface 48 and a second upper angled surface 50 connected on opposite sides to the top surface 36. Similarly, a first lower angled surface 60 and a second lower angled surface 62 are connected on opposite sides to the bottom surface 54. The first side connecting surface 64 (see e.g. Figure 5 ) is positioned between and connected to the second upper angled surface 50 and the first lower angled surface 60. The second side connecting surface 66 (see e.g. Figure 5 ) is positioned between and connected to the first upper angled surface 48 and the second lower angled surface 62.

[0065] refer to Figure 5 , shows a detailed perspective view of the grip end 22 according to an exemplary embodiment. A fastener, shown as a bolt 70, can be used to securely couple the hammer 10, and specifically the shaft 12, to the replaceable handle 24. When the bolt 70 is positioned within the grip insert 28 and the shaft 12 and tightened, a force is exerted on the grip insert 28 such that the grip insert 28 will be pressed against the shaft 12 (e.g., the end surface 44, the top surface 36, the bottom surface 54, etc.). In another embodiment, a different type of fastener (e.g., a nut, a screw, etc.) can be used. In a specific embodiment, a nut is used with the bolt 70. In another embodiment, the shaft 12 includes a threaded portion so that the bolt 70 can be used without a nut.

[0066] refer to Figures 3 to 5, the radially outwardly facing outer surface of the shaft 12 engages the grip insert 28 to resist rotation of the grip 26, the grip insert 28, and / or the interchangeable handle 24 relative to the shaft 12 during use of the hammer 10. The radially outwardly facing outer surface of the shaft 12 includes at least a portion of the top surface 36 and the bottom surface 54, the first upper angled surface 48, the second upper angled surface 50, the first lower angled surface 60, the second lower angled surface 62, the first side connecting surface 64, and the second side connecting surface 66. The radially outwardly facing outer surface of the shaft 12 extends along the length of the shaft 12. In various different embodiments, at least some portions of the radially outwardly facing outer surface, including surfaces 48, 50, 60, 62, 64, and 66, extend continuously along the entirety of L1. In various embodiments, at least some portions of the radially outward facing surfaces, including at least surfaces 48 , 50 , 60 , 62 , 64 , and 66 , extend continuously for at least 70% of length L1 , specifically at least 80% of length L1 , and more specifically at least 90% of length L1 .

[0067] In other words, instead of a single planar side surface (e.g., the side surface of a hammer shaft having a rectangular or square cross-sectional shape), the shaft 12 includes a multi-faceted (i.e., more than one face or surface) side surface that is positioned at non-ninety degree angles relative to each other. For example, instead of having a single planar side surface, the combination of the first lower angled surface 60, the first side connecting surface 64, and the second upper angled surface 50 forms a side (i.e., the portion of the outer surface extending between the top surface 36 and the bottom surface 54) or a portion of the radially outwardly facing outer surface of the shaft 12. Similarly, the opposing side surface is faceted or a combination of the second lower angled surface 62, the second side connecting surface 66, and the first upper angled surface 48. In various different specific embodiments, the side surface of the shaft 12 includes three components or three faces. In various different other embodiments, the side surface of the shaft 12 includes a different number (i.e., 2, 4, 5, etc.) of components or faces.

[0068] In various specific embodiments, the radially outwardly facing outer surface of the shaft 12 defines the outer surface of a polygonal prism. In such embodiments, the cross-sectional shape of the shaft 12 taken perpendicular to the longitudinal axis of the shaft 12 is polygonal (specifically, a non-rectangular polygon having more than four faces) such that the shaft 12 resists rotation of the grip 26 and the grip insert 28 relative to the shaft 12 during use of the hammer 10.

[0069] In various different specific embodiments, the radially outwardly facing outer surface of the shaft 12 defines the outer surface of a polygonal prism (i.e., an octagonal prism). In such an embodiment, at least a portion of the shaft 12 is an octagonal prism. In such an embodiment, the cross-sectional shape of the shaft 12 taken perpendicular to the longitudinal axis of the shaft 12 is octagonal (i.e., a complete octagon) such that the shaft 12 resists rotation of the grip 26 and the grip insert 28 relative to the shaft 12 during use of the hammer 10. In another specific embodiment, the polygonal prism is a convex polygonal prism (i.e., none of the vertices of the shape point inward). In other words, the interior angle of the polygonal prism is less than 180 degrees. In various different specific embodiments, the longitudinal axis of the shaft 12 extends in an orientation parallel to the longitudinal axis 32 of the hammer 10. In a specific embodiment, the longitudinal axis 32 of the shaft 12 is colinear with the longitudinal axis of the hammer 10.

[0070] In various different embodiments (where the shaft 12 includes the first channel 34 and / or the second channel 54), the outer surface of the shaft 12 defines the outer surface of a polygonal prism (e.g., an irregular polygonal prism). In such embodiments, the outer surface of the shaft 12 includes a portion of the top surface 36, a portion of the bottom surface 54, a first upper angled surface 48, a second upper angled surface 50, a first lower angled surface 60, a second lower angled surface 62, a first side connecting surface 64, and a second side connecting surface 66 and further includes the channel surface 38. The channel surface 38 includes a first downwardly extending portion (i.e., generally perpendicular to the top surface 36) that continues into a first angled portion that connects to the outwardly facing surface of the channel protrusion 40.

[0071] The outer surface of the channel protrusion 40 includes an upwardly extending surface that is generally parallel (i.e., 180 degrees plus or minus 10 degrees), and the upwardly extending surface continues into an upwardly facing surface that extends in an orientation perpendicular to the upwardly extending surface. The upwardly facing surface of the channel protrusion 40 continues and extends into a second upwardly extending surface, which is connected to a second angled portion, which is then connected to a second downwardly extending portion. The channel surface 38 is symmetrical about a plane centered on the channel protrusion. When the shaft 12 includes both the first channel 34 and the second channel 54, the channel surface 56 is the same as the channel surface 38 (i.e., includes the same shape).

[0072] In a particular embodiment, the gripping end 22 includes a tapered portion 68 between the end surface 44 and the first channel 34 or the second channel 52. The tapered portion 68 includes a bottom tapered surface 69 that tapers inwardly (e.g., toward the longitudinal axis 32). In a particular embodiment, the tapered surface 69 is positioned at an angle between 1° and 10°, specifically between 1° and 5° and more specifically at about 2.86° (e.g., about 2.86°±0.3°). In a particular embodiment, the remaining tapered surfaces extending from and corresponding to the top surface 36, the first upper angled surface 48, the first lower angled surface 60, etc. taper inwardly at about 2.86° (e.g., about 2.86°±0.3°).

[0073] In a particular embodiment, the first lower angled surface 60 is positioned at an angle A relative to the bottom surface 54. In a particular embodiment, the angle A is between 100° and 140°, specifically between 115° and 125°, and more specifically about 120° (e.g., 120°±3°). In a particular embodiment, the first side connecting surface 64 is positioned at an angle B relative to the first lower angled surface 60. In a particular embodiment, the angle B is between 130° and 160°, specifically between 145° and 155°, and more specifically about 150° (e.g., about 150°±3°). Similarly, the first side connecting surface 64 is positioned at an angle B relative to the second upper angled surface 50, and the second upper angled surface 50 is positioned at an angle A relative to the top surface 36.

[0074] refer to Figure 6 , shows a side perspective view of the shaft 12 received in the grip insert 28 according to an exemplary embodiment. The grip insert 28 includes an upper section 72, a lower section 74 (in Figure 1 The upper and lower sections 72, 74 extend along the longitudinal axis 32 and are each coupled to the grip base 76 at opposite sides so that the upper and lower sections are positioned facing the top and bottom surfaces 36, 54, respectively.

[0075] In various different embodiments, the grip insert 28 is formed of a first material and the grip 26 is formed of a second material. In a particular embodiment, the second material is different from the first material. In a particular embodiment, the grip insert 28 is formed of a thermoplastic polymer (e.g., polypropylene, polyethylene, acrylonitrile butadiene styrene (ABS), etc.). In a particular embodiment, the grip insert 28 is formed of polypropylene. In various different embodiments, the grip 26 is formed of a thermoplastic elastomer (e.g., thermoplastic vulcanizate (TPV), thermoplastic styrene elastomer (TPS), etc.). In a particular embodiment, the grip 26 is formed of a thermoplastic vulcanizate (e.g., Santoprene). In a particular embodiment, the replaceable handle 24 can be formed using co-injection molding. In other embodiments, the replaceable handle 24 can be formed using other methods. The grip 26 provides a compressive force to the grip insert 28 so that the replaceable handle 24 is fixedly engaged with the shaft 12.

[0076] As mentioned above and Figure 2 As shown, the grip 26 at least partially surrounds the grip insert 28, which includes the bottom or gripping end of the replaceable handle 24, where the fasteners (see, e.g., bolts 70) are located. The grip 26 defines at least a majority of the outermost or exterior surface of the replaceable handle 24. In a particular embodiment, the grip 26 entirely surrounds the grip insert 28, such that the grip 26 defines the entire outermost or exterior surface of the replaceable handle 24. The grip 26 is configured to provide a secure attachment and retention to the hammer 10 during an impact (e.g., a forceful contact with a falling object, the hammer being dropped, etc.). Compared to a typical replaceable handle, the replaceable handle 24 does not expose the grip insert 28 at the gripping end 22 of the hammer 10. As such, Applicant believes that the replaceable handle 24 is less susceptible to damage from forceful contact due to the enhanced impact protection of the grip insert 28 and the fasteners.

[0077] refer to Figure 7 , a side perspective view of the grip insert 28 according to an exemplary embodiment is shown. The upper section 72 and the lower section 74 each include opposing inwardly facing surfaces 96. The corresponding protrusions 94 are longitudinal protrusions coupled to each inwardly facing surface 96. The corresponding longitudinal protrusions 94 are configured to extend into (i.e., at least partially positioned in) and engage with the first channel 34 and the second channel 52, respectively, when the interchangeable handle 24 is assembled. The engagement between the corresponding protrusions 94 and the first channel 34 and the second channel 52 of the shaft 12 reduces and / or prevents undesired rotation of the grip insert 28 and the interchangeable handle 24 relative to the hammer 10.

[0078] The upper section 72 further includes an outwardly facing surface 78 (e.g., facing away from the shaft 12 when assembled). The lower section 74 similarly includes an outwardly facing surface 79. The outwardly facing surfaces 78, 79 each include a plurality of protrusions 80 and a plurality of attachment recesses 82 at least partially defined between adjacent protrusions 80. In a particular embodiment, the attachment recesses 82 have a dovetail shape. In another embodiment, the attachment recesses may have a different shape (e.g., triangular, etc.).

[0079] Each tab 80 includes a left attachment portion having an angled surface 84 facing inwardly (i.e., partially toward the outwardly facing surface 78 or 79), and an opposing right attachment portion of the tab 80 includes an angled surface 84 facing inwardly (i.e., partially toward the outwardly facing surface 78 or 79). A recessed portion 86 having the outwardly facing surface 78 or 79 extends between the angled surfaces 84. When the interchangeable handle 24 is assembled, the recessed portion 86 extends parallel to the longitudinal axis 32 of the hammer 10. When the grip insert 28 is coupled to the shaft 12, a first end 88 of the grip insert 28 is positioned adjacent the neck 14 and a second end 90 opposite the first end 88 is positioned adjacent the gripping end 22 of the hammer 10. The grip base 76 further includes a recessed portion 92 extending along the longitudinal axis 32.

[0080] refer to Figures 8 to 9 , which shows rear and front perspective views of the grip insert 28 according to an exemplary embodiment. The grip base 76 further includes an end surface 98 in which the recess 92 is defined. The recess 92 includes a lower surface 100. A hole 102 is defined in and extends through the lower surface 100 of the recess 92. When the grip insert 28 is coupled to the shaft 12, the hole 102 is aligned with the hole 46 so that the bolt 70 can extend through both the hole 102 and the hole 46.

[0081] A pair of base attachment recesses 104 are defined in the grip base 76. The base attachment recesses 104 extend in a direction substantially perpendicular to the plurality of attachment recesses 82. The base attachment recesses 104 and the attachment recesses 82 provide multiple points for mechanical engagement between the grip insert 28 and the grip 26, thereby providing a robust attachment between the grip insert 28 and the grip 26.

[0082] like Fig. 9As shown, the corresponding protrusions 94 each include a pair of protrusions 106 defining a longitudinal recess 108. Each longitudinal recess 108 is shaped to receive and engage the first channel protrusion 40 and / or the second channel protrusion 58 while the pair of protrusions 106 are received within the first channel 34 and the second channel 52. When the grip insert 28 is engaged and / or coupled to the shaft 12, the pair of protrusions 106 interact with the channel surfaces 38 and 56 and the longitudinal recesses 108 engage between the channel protrusions 40, 58 to provide additional mechanical resistance to unwanted twisting of the replaceable handle 24.

[0083] refer to Figures 10 to 13 , illustrates various aspects of a grip insert 128 according to an exemplary embodiment. The grip insert 128 may be used with the hammer 10 and the grip 26 to form an interchangeable handle 124. Overall, the grip insert 128 is substantially the same as the grip insert 28 except for the differences discussed herein.

[0084] refer to Fig.10 , shows a side perspective view of a grip insert 128 according to an exemplary embodiment. The grip insert 128 includes an upper section 172, a lower section 174 (in Figure 1 The upper and lower sections 172, 174 extend along the longitudinal axis 32 and are each coupled to the grip base 176 at opposite sides so that the upper and lower sections are positioned facing the top and bottom surfaces 36, 54 of the shaft 12, respectively.

[0085] The upper section 172 further includes an outwardly facing surface 178 (e.g., facing away from the shaft 12 when assembled). The lower section 174 similarly includes an outwardly facing surface 179. The outwardly facing surfaces 178, 179 each include a plurality of protrusions 180 and a plurality of attachment recesses 182 at least partially defined between adjacent protrusions 180.

[0086] Each tab 180 includes a left attachment portion having an angled surface 184 facing inwardly (i.e., partially toward the outwardly facing surface 178 or 179), and the opposite right attachment portion of the tab 180 includes an angled surface 184 facing inwardly (i.e., partially toward the outwardly facing surface 178 or 179). A recessed portion 186 having the outwardly facing surface 178 or 179 extends between the angled surfaces 184. When the interchangeable handle 124 is assembled, the recessed portion 186 extends parallel to the longitudinal axis 32 of the hammer 10. When the grip insert 128 is coupled to the shaft 12, a first end 188 of the grip insert 128 is positioned adjacent the neck 14 and a second end 190 opposite the first end 188 is positioned adjacent the gripping end 22 of the hammer 10. The grip base 176 further includes a recessed portion 192 extending along the longitudinal axis 32.

[0087] Compared to the grip insert 28, the upper and lower sections 172, 174 of the grip insert 128 include portions (see, e.g., 189, 191) extending on the sides of the shaft 12. The upper section 172 includes a pair of upper angled walls 189 connected to and angled downwardly from the outwardly facing surface 178 (at Fig.10 The lower section 174 similarly includes a pair of lower angled walls 191 connected to the outwardly facing surface 179 and angled upwardly (in the direction shown) from the outwardly facing surface. Fig.10 191 ). When the grip insert 128 is coupled to the shaft 12, the inner surface of the upper angled wall 189 faces the first upper angled surface 48 and the second upper angled surface 50, while the inner surface of the lower angled wall 191 faces the first lower angled surface 60 and the second lower angled surface 62. A pair of openings (shown as slits 193) extend along the longitudinal axis of the grip insert 128 and are defined between each upper angled wall 189 and the corresponding lower angled wall 191. When the grip insert 128 is coupled to the shaft 12, each slit 193 will be at least partially positioned on the first side connecting surface 64 and the second side connecting surface 66.

[0088] refer to Figure 11 to Figure 12 , which shows a rear perspective view and a front perspective view of the grip insert 128 according to an exemplary embodiment. The grip base 176 further includes an end surface 198 in which the recess 192 is defined. The recess 192 includes a lower surface 200. A hole 202 is defined in and extends through the lower surface 200 of the recess 192. When the grip insert 128 is coupled to the shaft 12, the hole 202 is aligned with the hole 46 so that the bolt 70 can extend through both the hole 202 and the hole 46.

[0089] The upper section 172 and the lower section 174 each include opposing inwardly facing surfaces 196. A corresponding protrusion 194 is coupled to each inwardly facing surface 196. The corresponding protrusion 194 is configured to engage with the first channel 34 and the second channel 52 when the interchangeable handle 24 is assembled. The engagement between the corresponding protrusion 194 and the first channel 34 and the second channel 52 of the shaft 12 reduces and / or prevents undesired rotation of the grip insert 128 and the interchangeable handle 24 relative to the hammer 10. In addition, the engagement between the upper angled wall 189 and the lower angled wall 191 and the first upper angled surface 48, the second upper angled surface 50, the first lower angled surface 60, and the second lower angled surface 62, respectively, provides additional torsional resistance.

[0090] A pair of base attachment recesses 204 are defined in the grip base 176. The base attachment recesses 204 extend in a direction substantially perpendicular to the plurality of attachment recesses 182. The base attachment recesses 204 and the attachment recesses 182 provide multiple points for mechanical engagement between the grip insert 128 and the grip 26, thereby providing a robust attachment between the grip insert 128 and the grip 26.

[0091] like Figure 12 to Figure 13 As shown, the corresponding protrusions 194 each include a pair of protrusions 206 defining a longitudinal recess 208. The longitudinal recesses 208 are shaped to receive and engage the first channel protrusion 40 and the second channel protrusion 58 while the pair of protrusions 206 are received within the first channel 34 and the second channel 52. When the grip insert 28 is engaged and / or coupled to the shaft 12, the pair of protrusions 206 interact with the channel surfaces 38 and 56 and the longitudinal recesses 208 engage between the channel protrusions 40, 58 to provide additional mechanical resistance to unwanted twisting of the replaceable handle 124.

[0092] refer to Figures 14 to 26 , various aspects of a handheld tool, shown as a hammer 310, are shown. The hammer 310 may be used with the interchangeable handle 24 and / or the interchangeable handle 124. In general, the hammer 310 is substantially the same as the hammer 10, except for the differences discussed herein. Figure 14 to Figure 15 As shown, the hammer 310 includes a neck 314, a shaft or body 312, and a head (shown as a hammer body 316). The hammer body 316 includes a horn 318 on the end of the hammer body 316 opposite the striking portion 319 of the hammer body 316. In various embodiments, the striking portion 319 includes a striking surface or striking face that is removable and / or replaceable. The longitudinal axis 332 extends along the main axis of the hammer 310 between the striking end 320 and the gripping end 322.

[0093] The hammer 310 includes a handle (shown as an interchangeable handle 324). In general, the interchangeable handle 324 is substantially the same as the interchangeable handle 24 and / or the interchangeable handle 124, except for the differences discussed herein. In various different embodiments, the grip 326 includes a grip texture and / or roughness 331. The grip texture 331 includes protrusions and / or recesses that provide grip (i.e., friction between a user's hand and the interchangeable handle 324). In a particular embodiment, the grip 326 defines at least a majority (i.e., greater than 50%) of the outermost or exterior surface of the interchangeable handle 324. In various different embodiments, the interchangeable handle 324 is formed using overmolding (i.e., the grip 326 is molded onto the grip insert 328).

[0094] refer to Figure 16 to Figure 17 , showing the top of the shaft 312 (at Fig.16 312 and a detailed perspective view of the bottom of the shaft 312. The bottom surface 354 of the shaft 312 includes a protrusion 355 that extends outwardly from the bottom surface 354 toward the grip insert 328. The grip insert 328 includes a corresponding channel 404 (see, e.g. Fig. 22 ), the channel is configured to receive and / or engage with the protrusion 355. When the user assembles the replaceable handle 324, the protrusion 355 and the channel 404 act together to prevent the user from improperly assembling the replaceable handle 324. Specifically, the protrusion 355 and the corresponding channel 404 prevent the replaceable handle 324 from being positioned in an incorrect orientation (i.e., upside down) because without the space provided by the channel 404, the shaft 312, and specifically the protrusion 355, will not be able to fit into the grip insert 328.

[0095] refer to Fig.18 , shows a detailed perspective view of the grip end 322 according to an exemplary embodiment. A fastener (shown as a bolt 370) can be used to securely couple the hammer 310, and specifically the shaft 312, to the replaceable handle 324. When the bolt 370 is positioned within the grip insert 328 and the shaft 312 and tightened, a force is exerted on the grip insert 28 such that the grip insert 328 will press against the shaft 312 (e.g., the end surface 344, the top surface 336, the bottom surface 354, etc.), thereby providing additional force to maintain the position of the replaceable grip 324 on the shaft 312. In a particular embodiment, the fastener 370 is a bolt that is used with a nut 371 and a washer 367 positioned within the fastening recess 342 when the replaceable handle 324 is assembled. In a particular embodiment, the head of the fastener 370 extends through the hole 410 of the grip 326 (see, e.g., Fig.26), so that the user can tighten the fastener 370 and / or the replaceable handle 324 onto the shaft 312, while the replaceable handle 324 is connected to the shaft 312 and / or the hammer 310.

[0096] In a particular embodiment, the first lower angled surface 360 ​​is positioned at an angle C relative to the bottom surface 354. In a particular embodiment, angle C is the same as angle A (i.e., the angle is approximately 120° (e.g., 120°±3°)). In a particular embodiment, the first side connecting surface 364 is positioned at an angle D relative to the first lower angled surface 360. In a particular embodiment, angle D is the same as angle B (i.e., the angle is approximately 150° (e.g., 150°±3°)). Similarly, the first side connecting surface 364 is positioned at an angle D relative to the second upper angled surface 350, and the second upper angled surface 350 is positioned at an angle C relative to the top surface 336.

[0097] refer to Figures 19 to 21 , showing details of a grip insert 328 according to an exemplary embodiment. Unlike grip insert 28, upper and lower sections 372, 374 of grip insert 328 include portions extending on the sides of shaft 312 (see, e.g., 389, 391). Upper section 372 includes a pair of upper angled walls 389 connected to outwardly facing surface 378 and angled downwardly from the outwardly facing surface (at Fig.21 The lower section 374 similarly includes a pair of lower angled walls 391 connected to the outwardly facing surface 379 and angled upwardly (in the orientation shown) from the outwardly facing surface. Fig.21 As shown in the direction Figures 19 to 20 As shown, when the grip insert 328 is coupled to the shaft 312, the inner surface of the upper angled wall 389 faces the first upper angled surface 348 and the second upper angled surface 350, while the inner surface of the lower angled wall 391 faces the first lower angled surface 360 ​​and the second lower angled surface 362. A pair of openings (shown as slits 373) extend along the longitudinal axis of the grip insert 328 and are defined between each upper angled wall 389 and the corresponding lower angled wall 391.

[0098] refer to Figure 22 to Figure 24 , shows a perspective view of a grip insert 328 according to an exemplary embodiment. When the replaceable handle 324 is assembled, a first end 388 of the grip insert 328 is positioned adjacent to the neck 314, and a second end 390 opposite the first end 388 is positioned adjacent to the grip end 322 of the hammer 310. The first end 388 of the grip insert 328 is positioned between the head 316 and the second end 390. A lip 393 is positioned at the first end 388 of the grip insert 328. Figure 14 to Figure 15As shown, in a particular embodiment, the grip 326 surrounds at least a majority of the second end 390 of the grip insert 328. In various different embodiments, the grip 326 can entirely surround the second end 390 of the grip insert 328.

[0099] The upper section 372 and the lower section 374 each include opposing inwardly facing surfaces 396. A single protrusion 394 is coupled to at least one of the inwardly facing surfaces 396, while one or more protrusions 394 are coupled to opposing inwardly facing surfaces 396. The corresponding protrusions 394 serve as anti-rotation reinforcement ribs for the grip insert 328 and are configured to engage with the first channel 334 and the second channel 352, respectively, when the replaceable handle 324 is assembled. The channel 404, which is configured to receive the protrusion 355 of the shaft 312, is positioned between the one or more protrusions 394 to prevent misalignment and / or incorrect orientation of the replaceable handle 324 during assembly or re-gripping.

[0100] As previously discussed, the engagement between the upper angled wall 389 and the lower angled wall 391 and the first upper angled surface 348, the second upper angled surface 350, the first lower angled surface 360, and the second lower angled surface 362, respectively, provides resistance to twisting or rotation of the interchangeable handle 324 relative to the shaft 312. In addition, applicants believe that the engagement between the corresponding protrusions 394 and the first and second channels 334, 352 of the shaft 312 reduces and / or further prevents undesired rotation of the grip insert 328 and the interchangeable handle 324 relative to the hammer 310.

[0101] refer to Fig.25 , shows a perspective view of a grip 326 coupled to a grip insert 328 according to an exemplary embodiment. The grip 326 includes an internal boss 406 that engages the lip 393 of the grip insert 328. Fig.26 As shown, the internal boss 406 is recessed or set back from the end surface 408, which is located adjacent to the first end 388 of the grip insert 328. The grip 326 further includes a through hole 410. When the replaceable handle 324 is coupled to the hammer 310, the through hole 410 is aligned with the hole 402 and with the hole 346 so that the fastener 370 can extend through the grip 326, the grip insert 328 and the shaft 312 to securely couple the replaceable handle 324 to the hammer 310. In other words, the fastener 370 extends through the second end 390 of the grip insert 328 along the longitudinal axis 322 of the hammer 310 to securely couple the replaceable handle 324 to the shaft 312.

[0102] refer to Figure 27 to Figure 28, various aspects of a handheld tool, shown as a hammer 510, are shown. The hammer 510 may be used with the interchangeable handle 24, the interchangeable handle 124, and / or the interchangeable handle 324. Overall, the hammer 510 is substantially the same as the hammer 10 and / or the hammer 310, except for the differences discussed herein.

[0103] The neck 514 of the hammer 510 includes a pulling feature (shown as a pile puller 534). The pile puller 534 includes an opening 536. When the user wants to pull a pile out of the ground or workpiece (i.e., wood), the hammer 510 is moved so that the opening 536 surrounds the pile. The rod portion 538 of the pile puller engages the pile to provide a removal force. In addition, the pile puller 534 can be used with a pry bar to remove fasteners (e.g., nails). When the engagement end of the pry bar grabs the nail, the opposite handle end of the pry bar can extend through the opening 536, and the user can engage and / or pull the pry bar, thereby allowing the user to more easily remove the nail.

[0104] refer to Figure 29 to Figure 30 , details of a nail holding system of a hammer 510 according to an exemplary embodiment are shown. In a particular embodiment, the head 516 includes a replaceable striking surface 540. A fastener channel (shown as a nail channel 542) extends through the head 516 and a portion of the replaceable striking surface 540. A fastener (shown as a nail 544) can be positioned within the nail channel 542 to hold the nail on the head 516 of the hammer 510. In a particular embodiment, the nail 544 is a stud nail. In such an embodiment, the nail 544 includes a first head 546 and a second head 548 to allow easy removal of the stud nail.

[0105] like Fig.30 As shown, the head 516 includes a recessed section 550. A magnetic component (shown as a magnet 552) is positioned within the recessed section 550. The magnet 552 is used to further secure and retain the nail 544 on the head 516. Compared to conventional fastener retaining systems that typically engage the shaft of the nail (i.e., are positioned along the nail channel 542), the applicant believes that when the magnet 552 engages the head of the nail 544, the retention of the nail is improved. In a specific embodiment, the magnet 552 is positioned to engage the nail 544 between the first head 546 and the second head 548.

[0106] Referring to 31, details of a nail holding system according to another exemplary embodiment are shown. The replaceable strike face 640 includes a strike surface 642 and an upper surface 644 extending in a substantially vertical orientation away from the strike surface 642. The upper surface 644 includes a recess 646 configured to receive a magnetic component (e.g., 552) to hold a fastener (e.g., a nail) on the replaceable strike face 640.

[0107] refer to Fig.32 , a partially exploded view of a hammer head 716 according to an exemplary embodiment is shown. In general, the head 716 is substantially the same as the head 16, the head 316, and / or the head 516, except for the differences discussed herein. The head 716 can be used with a replaceable impact face 740. The impact face 740 includes an impact surface 742 and an inwardly facing (i.e., toward the head 716) rear surface 744 opposite the impact surface 742. When the head 716 is fully assembled, the inwardly facing rear surface 744 is positioned along the outwardly facing surface 720 of the head 716.

[0108] When the impact surface 740 is coupled to the head 716, the connector (shown as a protrusion 745) extends away from the inwardly facing rear surface 744 toward the head 716. Specifically, the protrusion 745 is received by the hole 722 on the head 716, which is defined in the outwardly facing surface 720. The shape of the hole 722 corresponds to the shape of the protrusion 745. In various different specific embodiments, the protrusion 745 and the hole 722 have a star shape (i.e., 5 extensions or arms). In other embodiments, the hole 722 and the protrusion 745 can have other corresponding shapes (i.e., polygonal, triangular, etc.).

[0109] The projection 745 includes a radially outwardly facing surface 746. When the impact surface 740 is coupled to the head 716, the radially outwardly facing surface 746 is positioned against and / or engages with the radially inwardly facing surface 724 of the hole 722. To further secure the replaceable impact surface 740 to the head 716, a fastener (shown as a screw 726) may be used. The projection 745 further includes a hole 748 having a threaded inner surface 750 configured to engage the screw 726.

[0110] refer to Figure 33 to Figure 35 , details of a hammer face 760 according to an exemplary embodiment are shown, which can be used with head 716, head 516, head 316 and / or head 16. As will be generally understood, mallets are often used as striking tools but are typically made of a material (i.e., wood, rubber, plastic, etc.) that is softer than the hammer face to avoid crushing or denting the surface. The hammer face 760 allows the user to have a single striking tool that can be used as a hammer or a mallet without having to carry multiple striking tools. In a specific embodiment, the hammer face 760 is formed of a polymer. In another specific embodiment, the hammer face is formed of thermoplastic polyurethane (TPU).

[0111] The hammer face 760 includes a hammer striking surface 762 on an outer surface or outer surface 764. In a particular embodiment, the outer surface 764 includes a protrusion or wedge 766 that assists a user in placing or pulling the hammer face 760 during installation and / or removal from the hammer. In various different embodiments, the wedge 766 is symmetrical. The hammer face 760 has a concave portion 768 that is formed when the hammer face 760 is coupled to the hammer head (see, e.g., Fig.33 ), the recessed portion receives the striking face of the hammer when the hammer is inserted into the recessed portion 768. The recessed portion 768 includes an inner surface or inner surface 770. A plurality of internal ribs 772 are coupled to the inner surface 770. Applicants believe that the internal ribs 772 assist in removing the hammer face 760 by preventing a vacuum effect when a user attempts to remove or pull the hammer face 760 from the head 716.

[0112] It should be understood that the drawings show exemplary embodiments in detail, and it should be understood that the present application is not limited to the details or methods set forth in the specification or shown in the drawings. It should also be understood that the terminology is for descriptive purposes only and should not be considered as limiting.

[0113] In view of this specification, further modifications and alternative embodiments of various aspects of the utility model will be obvious to those skilled in the art. Accordingly, this specification should be interpreted as being illustrative only. The construction and arrangement shown in various different exemplary embodiments are illustrative only. Although only several embodiments are described in detail in this disclosure, many modifications (e.g., the size, size, structure, shape and proportion, parameter value, installation arrangement, use of materials, color, orientation, etc. of various different elements) can be made without substantially departing from the novel teaching content and advantages of the subject described herein. Some elements shown as being integrally formed can be constructed of multiple parts or elements, the position of the elements can be reversed or otherwise changed, and the nature or quantity or position of discrete elements can be changed or changed. According to alternative embodiments, the order or sequence of any process, logic algorithm or method steps can be changed or reordered. Without departing from the scope of the utility model, other substitutions, modifications, changes and omissions can also be made to the design, operating conditions and arrangement of various different exemplary embodiments.

[0114] Unless otherwise expressly stated, it is by no means intended that any method set forth herein be interpreted as requiring that its steps be performed in a particular order. Accordingly, in the absence of an actual enumeration of the order in which the steps of a method claim should be followed or a specific statement in the claim or specification that the steps should be limited to a particular order, it is by no means intended that any particular order can be inferred. In addition, as used herein, the article "a" is intended to include one or more parts or elements and is not intended to be interpreted as only one. As used herein, "rigidly coupled" means that two parts are coupled in such a way that the parts move together in a fixed positional relationship when subjected to force.

[0115] For the purposes of this disclosure, the term "coupled" means that two components are directly or indirectly connected to each other. Such connection may be fixed in nature, or removable in nature. Such connection may be achieved by the two components and any additional intermediate components being integrally formed with each other as a single unitary body, or by the two components or the two components and any additional components being attached to each other. Such connection may be permanent in nature, or alternatively may be removable or releasable in nature.

[0116] Although the present application describes a specific combination of features in the appended claims, various different embodiments of the present invention relate to any combination of any features described herein (whether or not such combination is currently required), and any such combination of features may be claimed in this application or in future applications. Any feature, element or component of any exemplary embodiment discussed above may be used alone or in combination with any feature, element or component of any other embodiment discussed above.

[0117] In various exemplary embodiments, the relative dimensions (including angles, lengths, and radii) shown in the drawings are to scale. Actual measurements of the drawings will disclose the relative dimensions, angles, and ratios of the various exemplary embodiments. Various exemplary embodiments extend to various different ranges around the absolute and relative dimensions, angles, and ratios that can be determined from the drawings. Various exemplary embodiments include any combination of one or more relative dimensions or angles that can be determined from the drawings. Further, actual dimensions not explicitly stated in this specification may be determined by using ratios of dimensions measured in the drawings in combination with explicit dimensions stated in this specification.

Claims

1. A hammer, characterized in that: The hammer includes: a head portion, the head portion including a striking portion; a shaft rigidly coupled to the head and extending along a longitudinal axis of the hammer; and A replaceable handle removably coupled to the shaft, the replaceable handle comprising: a grip insert coupled to the shaft; and a grip coupled to the grip insert and at least partially surrounding the grip insert; wherein a radially outwardly facing outer surface of the shaft engages the grip insert to resist rotation of the interchangeable handle relative to the shaft during use of the hammer.

2. The hammer according to claim 1, characterized in that The radially outwardly facing outer surface of the shaft extends the length of the shaft.

3. The hammer according to claim 1, characterized in that A cross-sectional shape of the shaft taken perpendicular to the longitudinal axis of the shaft is octagonal such that the shaft resists rotation of the grip and the grip insert relative to the shaft during use.

4. The hammer according to claim 1, characterized in that The shaft further includes a channel extending along the longitudinal axis of the hammer.

5. The hammer according to claim 4, characterized in that The grip insert includes a longitudinal projection, and wherein the longitudinal projection extends into and engages the passage of the shaft such that the grip insert resists rotation of the interchangeable handle relative to the shaft during use of the hammer.

6. The hammer according to claim 1, characterized in that The hammer further comprises: a pair of opposed passages defined in the shaft, the pair of opposed passages extending along a longitudinal axis of the hammer; and a pair of projections on the grip insert, the pair of projections extending inwardly toward the shaft and along the longitudinal axis of the hammer; Wherein, when the replaceable handle is coupled to the shaft, each of the projections is positioned within and engaged with one of the pair of opposing channels.

7. The hammer according to claim 1, characterized in that A fastener further secures the replaceable handle to the shaft, the fastener extending along the longitudinal axis of the hammer.

8. The hammer according to claim 1, characterized in that The grip insert is formed from a first polymer material and the grip is formed from a second polymer material, and wherein the first polymer material is different from the second polymer material.

9. A hammer, characterized in that: The hammer includes: head; a shaft rigidly coupled to the head and extending along a longitudinal axis of the hammer; and A replaceable handle coupled to the shaft, the replaceable handle comprising: A grip insert coupled to the shaft; the grip insert comprising: a first end; and The second end; wherein the first end is positioned between the head and the second end; and a grip coupled to the grip insert and surrounding the second end of the grip insert; Wherein, the grip provides a compressive force to the grip insert so that the replaceable handle is securely engaged with the shaft.

10. The hammer according to claim 9, characterized in that The grip insert is formed from a first material and the grip is formed from a second material different from the first material.

11. The hammer according to claim 10, characterized in that The first material is a thermoplastic polymer and the second material is a thermoplastic elastomer.

12. The hammer according to claim 10, characterized in that The first material is polypropylene and the second material is thermoplastic vulcanizate.

13. The hammer according to claim 9, characterized in that A cross-sectional shape of the shaft taken perpendicular to a longitudinal axis of the shaft is polygonal such that the shaft resists rotation of the grip and the grip insert relative to the shaft during use.

14. The hammer according to claim 9, characterized in that A cross-sectional shape of the shaft taken perpendicular to the longitudinal axis of the shaft is octagonal.

15. The hammer according to claim 9, characterized in that The hammer further includes a fastener coupling the grip insert to the shaft, wherein the fastener extends through the second end of the grip insert along the longitudinal axis of the hammer.

16. A hammer, characterized in that: The hammer includes: head; a shaft coupled to the head and extending along a longitudinal axis of the hammer; and A replaceable handle coupled to the shaft, the replaceable handle comprising: A grip insert coupled to the shaft; the grip insert comprising: a first end; and The second end; wherein the first end is positioned between the head and the second end; and a grip coupled to the grip insert; and A fastener extends through the second end of the grip insert along the longitudinal axis of the hammer to securely couple the replaceable handle to the shaft.

17. The hammer according to claim 16, characterized in that The head of the fastener extends through the hole in the grip, enabling a user to tighten the fastener and the interchangeable handle to the shaft while the interchangeable handle is coupled to the shaft.

18. The hammer according to claim 16, characterized in that The grip surrounds at least a majority of the second end of the grip insert.

19. The hammer according to claim 16, characterized in that The hammer further comprises: a passage defined in the shaft, the passage extending along a longitudinal axis of the hammer; and A longitudinal projection is coupled to the grip insert, the longitudinal projection being configured to engage the passageway of the shaft such that the grip insert resists rotation of the interchangeable handle relative to the shaft during use of the hammer.

20. The hammer of claim 16, wherein: The shaft is a polygonal prism, and an outer surface of the shaft engages the grip insert to resist rotation of the interchangeable handle relative to the shaft.

Images